Add kamal proxy update

For easy updates from Traefik to kamal-proxy, add `kamal proxy update`.

This stops and removes Traefik and kamal-proxy containers (just in case
it is run after an update). Then it starts kamal-proxy and calls
`kamal-proxy deploy` to route to any app containers that are already
running.

It can be run with a rolling option and calls the `pre-proxy-reboot` and
`post-proxy-reboot` hooks for each host.

.github/workflows/ci.yml

@@ -5,6 +5,21 @@ on:
       - main
   pull_request:
 jobs:
+  rubocop:
+    name: RuboCop
+    runs-on: ubuntu-latest
+    env:
+      BUNDLE_ONLY: rubocop
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Setup Ruby and install gems
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.3.0
+          bundler-cache: true
+      - name: Run Rubocop
+        run: bundle exec rubocop --parallel
   tests:
     strategy:
       matrix:
@@ -12,17 +27,29 @@ jobs:
           - "2.7"
           - "3.1"
           - "3.2"
+          - "3.3"
         gemfile:
           - Gemfile
+          - gemfiles/ruby_2.7.gemfile
           - gemfiles/rails_edge.gemfile
-        continue-on-error: [false]
+        exclude:
+          - ruby-version: "2.7"
+            gemfile: Gemfile
+          - ruby-version: "2.7"
+            gemfile: gemfiles/rails_edge.gemfile
+          - ruby-version: "3.1"
+            gemfile: gemfiles/ruby_2.7.gemfile
+          - ruby-version: "3.2"
+            gemfile: gemfiles/ruby_2.7.gemfile
+          - ruby-version: "3.3"
+            gemfile: gemfiles/ruby_2.7.gemfile
     name: ${{ format('Tests (Ruby {0})', matrix.ruby-version) }}
     runs-on: ubuntu-latest
-    continue-on-error: ${{ matrix.continue-on-error }}
+    continue-on-error: true
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install Ruby
         uses: ruby/setup-ruby@v1

.rubocop.yml

@@ -0,0 +1,2 @@
+inherit_gem:
+  rubocop-rails-omakase: rubocop.yml

Gemfile

@@ -1,4 +1,8 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 gemspec
+
+group :rubocop do
+  gem "rubocop-rails-omakase", require: false
+end

Gemfile.lock

@@ -1,96 +1,171 @@
 PATH
   remote: .
   specs:
-    kamal (0.16.1)
+    kamal (1.5.2)
       activesupport (>= 7.0)
+      base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)
       concurrent-ruby (~> 1.2)
       dotenv (~> 2.8)
       ed25519 (~> 1.2)
       net-ssh (~> 7.0)
-      sshkit (~> 1.21)
+      sshkit (>= 1.22.2, < 2.0)
       thor (~> 1.2)
       zeitwerk (~> 2.5)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (7.0.4.3)
+    actionpack (7.1.2)
-      actionview (= 7.0.4.3)
+      actionview (= 7.1.2)
-      activesupport (= 7.0.4.3)
+      activesupport (= 7.1.2)
-      rack (~> 2.0, >= 2.2.0)
+      nokogiri (>= 1.8.5)
+      racc
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
+      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+      rails-html-sanitizer (~> 1.6)
-    actionview (7.0.4.3)
+    actionview (7.1.2)
-      activesupport (= 7.0.4.3)
+      activesupport (= 7.1.2)
       builder (~> 3.1)
-      erubi (~> 1.4)
+      erubi (~> 1.11)
-      rails-dom-testing (~> 2.0)
+      rails-dom-testing (~> 2.2)
-      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+      rails-html-sanitizer (~> 1.6)
-    activesupport (7.0.4.3)
+    activesupport (7.1.2)
+      base64
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
+      mutex_m
       tzinfo (~> 2.0)
+    ast (2.4.2)
+    base64 (0.2.0)
     bcrypt_pbkdf (1.1.0)
+    bigdecimal (3.1.5)
     builder (3.2.4)
     concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
     crass (1.0.6)
-    debug (1.7.2)
+    debug (1.9.1)
-      irb (>= 1.5.0)
+      irb (~> 1.10)
-      reline (>= 0.3.1)
+      reline (>= 0.3.8)
     dotenv (2.8.1)
+    drb (2.2.0)
+      ruby2_keywords
     ed25519 (1.3.0)
     erubi (1.12.0)
-    i18n (1.12.0)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    io-console (0.6.0)
+    io-console (0.7.1)
-    irb (1.6.3)
+    irb (1.11.0)
-      reline (>= 0.3.0)
+      rdoc
-    loofah (2.20.0)
+      reline (>= 0.3.8)
+    json (2.7.1)
+    language_server-protocol (3.17.0.3)
+    loofah (2.22.0)
       crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
+      nokogiri (>= 1.12.0)
-    method_source (1.0.0)
+    minitest (5.20.0)
-    minitest (5.18.0)
+    mocha (2.1.0)
-    mocha (2.0.2)
       ruby2_keywords (>= 0.0.5)
+    mutex_m (0.2.0)
     net-scp (4.0.0)
       net-ssh (>= 2.6.5, < 8.0.0)
-    net-ssh (7.1.0)
+    net-sftp (4.0.0)
-    nokogiri (1.14.2-arm64-darwin)
+      net-ssh (>= 5.0.0, < 8.0.0)
+    net-ssh (7.2.1)
+    nokogiri (1.16.0-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.14.2-x86_64-darwin)
+    nokogiri (1.16.0-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.14.2-x86_64-linux)
+    nokogiri (1.16.0-x86_64-linux)
       racc (~> 1.4)
-    racc (1.6.2)
+    parallel (1.24.0)
-    rack (2.2.6.4)
+    parser (3.3.0.5)
+      ast (~> 2.4.1)
+      racc
+    psych (5.1.2)
+      stringio
+    racc (1.7.3)
+    rack (3.0.8)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)
-    rails-dom-testing (2.0.3)
+    rackup (2.1.0)
-      activesupport (>= 4.2.0)
+      rack (>= 3)
+      webrick (~> 1.8)
+    rails-dom-testing (2.2.0)
+      activesupport (>= 5.0.0)
+      minitest
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.5.0)
+    rails-html-sanitizer (1.6.0)
-      loofah (~> 2.19, >= 2.19.1)
+      loofah (~> 2.21)
-    railties (7.0.4.3)
+      nokogiri (~> 1.14)
-      actionpack (= 7.0.4.3)
+    railties (7.1.2)
-      activesupport (= 7.0.4.3)
+      actionpack (= 7.1.2)
-      method_source
+      activesupport (= 7.1.2)
+      irb
+      rackup (>= 1.0.0)
       rake (>= 12.2)
-      thor (~> 1.0)
+      thor (~> 1.0, >= 1.2.2)
-      zeitwerk (~> 2.5)
+      zeitwerk (~> 2.6)
-    rake (13.0.6)
+    rainbow (3.1.1)
-    reline (0.3.3)
+    rake (13.1.0)
+    rdoc (6.6.2)
+      psych (>= 4.0.0)
+    regexp_parser (2.9.0)
+    reline (0.4.2)
       io-console (~> 0.5)
+    rexml (3.2.6)
+    rubocop (1.62.1)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.31.2)
+      parser (>= 3.3.0.4)
+    rubocop-minitest (0.35.0)
+      rubocop (>= 1.61, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+    rubocop-performance (1.20.2)
+      rubocop (>= 1.48.1, < 2.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
+    rubocop-rails (2.24.0)
+      activesupport (>= 4.2.0)
+      rack (>= 1.1)
+      rubocop (>= 1.33.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+    rubocop-rails-omakase (1.0.0)
+      rubocop
+      rubocop-minitest
+      rubocop-performance
+      rubocop-rails
+    ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
-    sshkit (1.21.4)
+    sshkit (1.22.2)
+      base64
+      mutex_m
       net-scp (>= 1.1.2)
+      net-sftp (>= 2.1.2)
       net-ssh (>= 2.8.0)
-    thor (1.2.1)
+    stringio (3.1.0)
+    thor (1.3.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    zeitwerk (2.6.7)
+    unicode-display_width (2.5.0)
+    webrick (1.8.1)
+    zeitwerk (2.6.12)
 
 PLATFORMS
   arm64-darwin
@@ -102,6 +177,7 @@ DEPENDENCIES
   kamal!
   mocha
   railties
+  rubocop-rails-omakase
 
 BUNDLED WITH
    2.4.3

README.md

@@ -1,6 +1,6 @@
 # Kamal: Deploy web apps anywhere
 
-From bare metal to cloud VMs using Docker, deploy web apps anywhere with zero downtime. Kamal uses the dynamic reverse-proxy Traefik to hold requests, while the new app container is started and the old one is stopped — working seamlessly across multiple hosts, using SSHKit to execute commands. Originally built for Rails apps, Kamal will work with any type of web app that can be containerized with Docker.
+From bare metal to cloud VMs, deploy web apps anywhere with zero downtime. Kamal uses a [custom proxy](https://github.com/basecamp/kamal-proxy) for zero-downtime deployments. Works seamlessly across multiple hosts, using SSHKit to execute commands. Originally built for Rails apps, Kamal will work with any type of web app that can be containerized with Docker.
 
 ➡️ See [kamal-deploy.org](https://kamal-deploy.org) for documentation on [installation](https://kamal-deploy.org/docs/installation), [configuration](https://kamal-deploy.org/docs/configuration), and [commands](https://kamal-deploy.org/docs/commands).
 

gemfiles/ruby_2.7.gemfile

@@ -0,0 +1,6 @@
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+gemspec path: "../"
+
+gem "nokogiri", "~> 1.15.0"

kamal.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.executables = %w[ kamal ]
 
   spec.add_dependency "activesupport", ">= 7.0"
-  spec.add_dependency "sshkit", "~> 1.21"
+  spec.add_dependency "sshkit", ">= 1.22.2", "< 2.0"
   spec.add_dependency "net-ssh", "~> 7.0"
   spec.add_dependency "thor", "~> 1.2"
   spec.add_dependency "dotenv", "~> 2.8"
@@ -20,6 +20,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "ed25519", "~> 1.2"
   spec.add_dependency "bcrypt_pbkdf", "~> 1.0"
   spec.add_dependency "concurrent-ruby", "~> 1.2"
+  spec.add_dependency "base64", "~> 0.2"
 
   spec.add_development_dependency "debug"
   spec.add_development_dependency "mocha"

lib/kamal.rb

@@ -5,6 +5,6 @@ require "active_support"
 require "zeitwerk"
 
 loader = Zeitwerk::Loader.for_gem
-loader.ignore("#{__dir__}/kamal/sshkit_with_ext.rb")
+loader.ignore(File.join(__dir__, "kamal", "sshkit_with_ext.rb"))
 loader.setup
 loader.eager_load # We need all commands loaded.

lib/kamal/cli.rb

@@ -1,6 +1,7 @@
 module Kamal::Cli
   class LockError < StandardError; end
   class HookError < StandardError; end
+  class BootError < StandardError; end
 end
 
 # SSHKit uses instance eval, so we need a global const for ergonomics

lib/kamal/cli/accessory.rb

@@ -1,15 +1,15 @@
 class Kamal::Cli::Accessory < Kamal::Cli::Base
   desc "boot [NAME]", "Boot new accessory service on host (use NAME=all to boot all accessories)"
   def boot(name, login: true)
-    mutating do
+    with_lock do
       if name == "all"
         KAMAL.accessory_names.each { |accessory_name| boot(accessory_name) }
       else
-        with_accessory(name) do |accessory|
+        with_accessory(name) do |accessory, hosts|
           directories(name)
           upload(name)
 
-          on(accessory.hosts) do
+          on(hosts) do
             execute *KAMAL.registry.login if login
             execute *KAMAL.auditor.record("Booted #{name} accessory"), verbosity: :debug
             execute *accessory.run
@@ -21,9 +21,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "upload [NAME]", "Upload accessory files to host", hide: true
   def upload(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           accessory.files.each do |(local, remote)|
             accessory.ensure_local_file_present(local)
 
@@ -38,9 +38,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "directories [NAME]", "Create accessory directories on host", hide: true
   def directories(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           accessory.directories.keys.each do |host_path|
             execute *accessory.make_directory(host_path)
           end
@@ -49,26 +49,30 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
     end
   end
 
-  desc "reboot [NAME]", "Reboot existing accessory on host (stop container, remove container, start new container)"
+  desc "reboot [NAME]", "Reboot existing accessory on host (stop container, remove container, start new container; use NAME=all to boot all accessories)"
   def reboot(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      if name == "all"
-        on(accessory.hosts) do
+        KAMAL.accessory_names.each { |accessory_name| reboot(accessory_name) }
-          execute *KAMAL.registry.login
+      else
-        end
+        with_accessory(name) do |accessory, hosts|
+          on(hosts) do
+            execute *KAMAL.registry.login
+          end
 
-        stop(name)
+          stop(name)
-        remove_container(name)
+          remove_container(name)
-        boot(name, login: false)
+          boot(name, login: false)
+        end
       end
     end
   end
 
   desc "start [NAME]", "Start existing accessory container on host"
   def start(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           execute *KAMAL.auditor.record("Started #{name} accessory"), verbosity: :debug
           execute *accessory.start
         end
@@ -78,9 +82,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "stop [NAME]", "Stop existing accessory container on host"
   def stop(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           execute *KAMAL.auditor.record("Stopped #{name} accessory"), verbosity: :debug
           execute *accessory.stop, raise_on_non_zero_exit: false
         end
@@ -90,7 +94,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "restart [NAME]", "Restart existing accessory container on host"
   def restart(name)
-    mutating do
+    with_lock do
       with_accessory(name) do
         stop(name)
         start(name)
@@ -103,8 +107,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
     if name == "all"
       KAMAL.accessory_names.each { |accessory_name| details(accessory_name) }
     else
-      with_accessory(name) do |accessory|
+      type = "Accessory #{name}"
-        on(accessory.hosts) { puts capture_with_info(*accessory.info) }
+      with_accessory(name) do |accessory, hosts|
+        on(hosts) { puts_by_host host, capture_with_info(*accessory.info), type: type }
       end
     end
   end
@@ -113,7 +118,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
   option :interactive, aliases: "-i", type: :boolean, default: false, desc: "Execute command over ssh for an interactive shell (use for console/bash)"
   option :reuse, type: :boolean, default: false, desc: "Reuse currently running container instead of starting a new one"
   def exec(name, cmd)
-    with_accessory(name) do |accessory|
+    with_accessory(name) do |accessory, hosts|
       case
       when options[:interactive] && options[:reuse]
         say "Launching interactive command with via SSH from existing container...", :magenta
@@ -125,14 +130,14 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
       when options[:reuse]
         say "Launching command from existing container...", :magenta
-        on(accessory.hosts) do
+        on(hosts) do
           execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on #{name} accessory"), verbosity: :debug
           capture_with_info(*accessory.execute_in_existing_container(cmd))
         end
 
       else
         say "Launching command from new container...", :magenta
-        on(accessory.hosts) do
+        on(hosts) do
           execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on #{name} accessory"), verbosity: :debug
           capture_with_info(*accessory.execute_in_new_container(cmd))
         end
@@ -146,12 +151,12 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
   option :grep, aliases: "-g", desc: "Show lines with grep match only (use this to fetch specific requests by id)"
   option :follow, aliases: "-f", desc: "Follow logs on primary server (or specific host set by --hosts)"
   def logs(name)
-    with_accessory(name) do |accessory|
+    with_accessory(name) do |accessory, hosts|
       grep = options[:grep]
 
       if options[:follow]
         run_locally do
-          info "Following logs on #{accessory.hosts}..."
+          info "Following logs on #{hosts}..."
           info accessory.follow_logs(grep: grep)
           exec accessory.follow_logs(grep: grep)
         end
@@ -159,7 +164,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
         since = options[:since]
         lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
 
-        on(accessory.hosts) do
+        on(hosts) do
           puts capture_with_info(*accessory.logs(since: since, lines: lines, grep: grep))
         end
       end
@@ -169,17 +174,12 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
   desc "remove [NAME]", "Remove accessory container, image and data directory from host (use NAME=all to remove all accessories)"
   option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
   def remove(name)
-    mutating do
+    confirming "This will remove all containers, images and data directories for #{name}. Are you sure?" do
-      if name == "all"
+      with_lock do
-        KAMAL.accessory_names.each { |accessory_name| remove(accessory_name) }
+        if name == "all"
-      else
+          KAMAL.accessory_names.each { |accessory_name| remove_accessory(accessory_name) }
-        if options[:confirmed] || ask("This will remove all containers, images and data directories for #{name}. Are you sure?", limited_to: %w( y N ), default: "N") == "y"
+        else
-          with_accessory(name) do
+          remove_accessory(name)
-            stop(name)
-            remove_container(name)
-            remove_image(name)
-            remove_service_directory(name)
-          end
         end
       end
     end
@@ -187,9 +187,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "remove_container [NAME]", "Remove accessory container from host", hide: true
   def remove_container(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           execute *KAMAL.auditor.record("Remove #{name} accessory container"), verbosity: :debug
           execute *accessory.remove_container
         end
@@ -199,9 +199,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "remove_image [NAME]", "Remove accessory image from host", hide: true
   def remove_image(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           execute *KAMAL.auditor.record("Removed #{name} accessory image"), verbosity: :debug
           execute *accessory.remove_image
         end
@@ -211,9 +211,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   desc "remove_service_directory [NAME]", "Remove accessory directory used for uploaded files and data directories from host", hide: true
   def remove_service_directory(name)
-    mutating do
+    with_lock do
-      with_accessory(name) do |accessory|
+      with_accessory(name) do |accessory, hosts|
-        on(accessory.hosts) do
+        on(hosts) do
           execute *accessory.remove_service_directory
         end
       end
@@ -222,8 +222,9 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
 
   private
     def with_accessory(name)
-      if accessory = KAMAL.accessory(name)
+      if KAMAL.config.accessory(name)
-        yield accessory
+        accessory = KAMAL.accessory(name)
+        yield accessory, accessory_hosts(accessory)
       else
         error_on_missing_accessory(name)
       end
@@ -236,4 +237,21 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
         "No accessory by the name of '#{name}'" +
         (options ? " (options: #{options.to_sentence})" : "")
     end
+
+    def accessory_hosts(accessory)
+      if KAMAL.specific_hosts&.any?
+        KAMAL.specific_hosts & accessory.hosts
+      else
+        accessory.hosts
+      end
+    end
+
+    def remove_accessory(name)
+      with_accessory(name) do
+        stop(name)
+        remove_container(name)
+        remove_image(name)
+        remove_service_directory(name)
+      end
+    end
 end

lib/kamal/cli/app.rb

@@ -1,70 +1,54 @@
 class Kamal::Cli::App < Kamal::Cli::Base
   desc "boot", "Boot app on servers (or reboot app if already running)"
   def boot
-    mutating do
+    with_lock do
-      hold_lock_on_error do
+      say "Get most recent version available as an image...", :magenta unless options[:version]
-        say "Get most recent version available as an image...", :magenta unless options[:version]
+      using_version(version_or_latest) do |version|
-        using_version(version_or_latest) do |version|
+        say "Start container with version #{version} using a #{KAMAL.config.readiness_delay}s readiness delay (or reboot if already running)...", :magenta
-          say "Start container with version #{version} using a #{KAMAL.config.readiness_delay}s readiness delay (or reboot if already running)...", :magenta
 
-          on(KAMAL.hosts) do
+        # Assets are prepared in a separate step to ensure they are on all hosts before booting
-            execute *KAMAL.auditor.record("Tagging #{KAMAL.config.absolute_image} as the latest image"), verbosity: :debug
+        on(KAMAL.hosts) do
-            execute *KAMAL.app.tag_current_as_latest
+          KAMAL.roles_on(host).each do |role|
+            PrepareAssets.new(host, role, self).run
           end
+        end
 
-          on(KAMAL.hosts, **KAMAL.boot_strategy) do |host|
+        # Primary hosts and roles are returned first, so they can open the barrier
-            roles = KAMAL.roles_on(host)
+        barrier = Barrier.new if KAMAL.roles.many?
 
-            roles.each do |role|
+        on(KAMAL.hosts, **KAMAL.boot_strategy) do |host|
-              app = KAMAL.app(role: role)
+          KAMAL.roles_on(host).each do |role|
-              auditor = KAMAL.auditor(role: role)
+            Boot.new(host, role, self, version, barrier).run
-              role_config = KAMAL.config.role(role)
-
-              if capture_with_info(*app.container_id_for_version(version), raise_on_non_zero_exit: false).present?
-                tmp_version = "#{version}_replaced_#{SecureRandom.hex(8)}"
-                info "Renaming container #{version} to #{tmp_version} as already deployed on #{host}"
-                execute *auditor.record("Renaming container #{version} to #{tmp_version}"), verbosity: :debug
-                execute *app.rename_container(version: version, new_version: tmp_version)
-              end
-
-              execute *auditor.record("Booted app version #{version}"), verbosity: :debug
-
-              old_version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
-
-              if role_config.uses_cord?
-                execute *app.tie_cord(role_config.cord_host_file)
-              end
-
-              execute *app.run(hostname: "#{host}-#{SecureRandom.hex(6)}")
-
-              Kamal::Utils::HealthcheckPoller.wait_for_healthy(pause_after_ready: true) { capture_with_info(*app.status(version: version)) }
-
-              if old_version.present?
-                if role_config.uses_cord?
-                  cord = capture_with_info(*app.cord(version: old_version), raise_on_non_zero_exit: false).strip
-                  if cord.present?
-                    execute *app.cut_cord(cord)
-                    Kamal::Utils::HealthcheckPoller.wait_for_unhealthy(pause_after_ready: true) { capture_with_info(*app.status(version: old_version)) }
-                  end
-                end
-                execute *app.stop(version: old_version), raise_on_non_zero_exit: false
-              end
-            end
           end
         end
+
+        # Tag once the app booted on all hosts
+        on(KAMAL.hosts) do |host|
+          execute *KAMAL.auditor.record("Tagging #{KAMAL.config.absolute_image} as the latest image"), verbosity: :debug
+          execute *KAMAL.app.tag_latest_image
+        end
       end
     end
   end
 
   desc "start", "Start existing app container on servers"
   def start
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do |host|
         roles = KAMAL.roles_on(host)
 
         roles.each do |role|
+          app = KAMAL.app(role: role, host: host)
           execute *KAMAL.auditor.record("Started app version #{KAMAL.config.version}"), verbosity: :debug
-          execute *KAMAL.app(role: role).start, raise_on_non_zero_exit: false
+          execute *app.start, raise_on_non_zero_exit: false
+
+          if role.running_proxy?
+            version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
+            endpoint = capture_with_info(*app.container_endpoint(version: version)).strip
+            raise Kamal::Cli::BootError, "Failed to get endpoint for #{role} on #{host}, did the container boot?" if endpoint.empty?
+
+            execute *KAMAL.proxy.deploy(role.container_prefix, target: endpoint)
+          end
         end
       end
     end
@@ -72,13 +56,24 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
   desc "stop", "Stop app container on servers"
   def stop
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do |host|
         roles = KAMAL.roles_on(host)
 
         roles.each do |role|
+          app = KAMAL.app(role: role, host: host)
+          version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
+
           execute *KAMAL.auditor.record("Stopped app", role: role), verbosity: :debug
-          execute *KAMAL.app(role: role).stop, raise_on_non_zero_exit: false
+
+          if role.running_proxy?
+            endpoint = capture_with_info(*app.container_endpoint(version: version)).strip
+            if endpoint.present?
+              execute *KAMAL.proxy.remove(role.container_prefix, target: endpoint), raise_on_non_zero_exit: false
+            end
+          end
+
+          execute *app.stop, raise_on_non_zero_exit: false
         end
       end
     end
@@ -91,28 +86,32 @@ class Kamal::Cli::App < Kamal::Cli::Base
       roles = KAMAL.roles_on(host)
 
       roles.each do |role|
-        puts_by_host host, capture_with_info(*KAMAL.app(role: role).info)
+        puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).info)
       end
     end
   end
 
-  desc "exec [CMD]", "Execute a custom command on servers (use --help to show options)"
+  desc "exec [CMD]", "Execute a custom command on servers within the app container (use --help to show options)"
   option :interactive, aliases: "-i", type: :boolean, default: false, desc: "Execute command over ssh for an interactive shell (use for console/bash)"
   option :reuse, type: :boolean, default: false, desc: "Reuse currently running container instead of starting a new one"
+  option :env, aliases: "-e", type: :hash, desc: "Set environment variables for the command"
   def exec(cmd)
+    env = options[:env]
     case
     when options[:interactive] && options[:reuse]
       say "Get current version of running container...", :magenta unless options[:version]
       using_version(options[:version] || current_running_version) do |version|
         say "Launching interactive command with version #{version} via SSH from existing container on #{KAMAL.primary_host}...", :magenta
-        run_locally { exec KAMAL.app(role: "web").execute_in_existing_container_over_ssh(cmd, host: KAMAL.primary_host) }
+        run_locally { exec KAMAL.app(role: KAMAL.primary_role, host: KAMAL.primary_host).execute_in_existing_container_over_ssh(cmd, env: env) }
       end
 
     when options[:interactive]
       say "Get most recent version available as an image...", :magenta unless options[:version]
       using_version(version_or_latest) do |version|
         say "Launching interactive command with version #{version} via SSH from new container on #{KAMAL.primary_host}...", :magenta
-        run_locally { exec KAMAL.app(role: KAMAL.roles_on(KAMAL.primary_host).first).execute_in_new_container_over_ssh(cmd, host: KAMAL.primary_host) }
+        run_locally do
+          exec KAMAL.app(role: KAMAL.primary_role, host: KAMAL.primary_host).execute_in_new_container_over_ssh(cmd, env: env)
+        end
       end
 
     when options[:reuse]
@@ -125,7 +124,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
           roles.each do |role|
             execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on app version #{version}", role: role), verbosity: :debug
-            puts_by_host host, capture_with_info(*KAMAL.app(role: role).execute_in_existing_container(cmd))
+            puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).execute_in_existing_container(cmd, env: env))
           end
         end
       end
@@ -135,8 +134,12 @@ class Kamal::Cli::App < Kamal::Cli::Base
       using_version(version_or_latest) do |version|
         say "Launching command with version #{version} from new container...", :magenta
         on(KAMAL.hosts) do |host|
-          execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on app version #{version}"), verbosity: :debug
+          roles = KAMAL.roles_on(host)
-          puts_by_host host, capture_with_info(*KAMAL.app.execute_in_new_container(cmd))
+
+          roles.each do |role|
+            execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on app version #{version}"), verbosity: :debug
+            puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).execute_in_new_container(cmd, env: env))
+          end
         end
       end
     end
@@ -150,19 +153,21 @@ class Kamal::Cli::App < Kamal::Cli::Base
   desc "stale_containers", "Detect app stale containers"
   option :stop, aliases: "-s", type: :boolean, default: false, desc: "Stop the stale containers found"
   def stale_containers
-    mutating do
+    stop = options[:stop]
-      stop = options[:stop]
-
-      cli = self
 
+    with_lock_if_stopping do
       on(KAMAL.hosts) do |host|
         roles = KAMAL.roles_on(host)
 
         roles.each do |role|
-          cli.send(:stale_versions, host: host, role: role).each do |version|
+          app = KAMAL.app(role: role, host: host)
+          versions = capture_with_info(*app.list_versions, raise_on_non_zero_exit: false).split("\n")
+          versions -= [ capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip ]
+
+          versions.each do |version|
             if stop
               puts_by_host host, "Stopping stale container for role #{role} with version #{version}"
-              execute *KAMAL.app(role: role).stop(version: version), raise_on_non_zero_exit: false
+              execute *app.stop(version: version), raise_on_non_zero_exit: false
             else
               puts_by_host host,  "Detected stale container for role #{role} with version #{version} (use `kamal app stale_containers --stop` to stop)"
             end
@@ -186,19 +191,21 @@ class Kamal::Cli::App < Kamal::Cli::Base
     # FIXME: Catch when app containers aren't running
 
     grep = options[:grep]
-
+    since = options[:since]
     if options[:follow]
+      lines = options[:lines].presence || ((since || grep) ? nil : 10) # Default to 10 lines if since or grep isn't set
+
       run_locally do
         info "Following logs on #{KAMAL.primary_host}..."
 
-        KAMAL.specific_roles ||= ["web"]
+        KAMAL.specific_roles ||= [ "web" ]
         role = KAMAL.roles_on(KAMAL.primary_host).first
 
-        info KAMAL.app(role: role).follow_logs(host: KAMAL.primary_host, grep: grep)
+        app = KAMAL.app(role: role, host: host)
-        exec KAMAL.app(role: role).follow_logs(host: KAMAL.primary_host, grep: grep)
+        info app.follow_logs(host: KAMAL.primary_host, lines: lines, grep: grep)
+        exec app.follow_logs(host: KAMAL.primary_host, lines: lines, grep: grep)
       end
     else
-      since = options[:since]
       lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
 
       on(KAMAL.hosts) do |host|
@@ -206,7 +213,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
         roles.each do |role|
           begin
-            puts_by_host host, capture_with_info(*KAMAL.app(role: role).logs(since: since, lines: lines, grep: grep))
+            puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).logs(since: since, lines: lines, grep: grep))
           rescue SSHKit::Command::Failed
             puts_by_host host, "Nothing found"
           end
@@ -217,7 +224,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
   desc "remove", "Remove app containers and images from servers"
   def remove
-    mutating do
+    with_lock do
       stop
       remove_containers
       remove_images
@@ -226,13 +233,13 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
   desc "remove_container [VERSION]", "Remove app container with given version from servers", hide: true
   def remove_container(version)
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do |host|
         roles = KAMAL.roles_on(host)
 
         roles.each do |role|
           execute *KAMAL.auditor.record("Removed app container with version #{version}", role: role), verbosity: :debug
-          execute *KAMAL.app(role: role).remove_container(version: version)
+          execute *KAMAL.app(role: role, host: host).remove_container(version: version)
         end
       end
     end
@@ -240,13 +247,13 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
   desc "remove_containers", "Remove all app containers from servers", hide: true
   def remove_containers
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do |host|
         roles = KAMAL.roles_on(host)
 
         roles.each do |role|
           execute *KAMAL.auditor.record("Removed all app containers", role: role), verbosity: :debug
-          execute *KAMAL.app(role: role).remove_containers
+          execute *KAMAL.app(role: role, host: host).remove_containers
         end
       end
     end
@@ -254,7 +261,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
 
   desc "remove_images", "Remove all app images from servers", hide: true
   def remove_images
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do
         execute *KAMAL.auditor.record("Removed all app images"), verbosity: :debug
         execute *KAMAL.app.remove_images
@@ -266,7 +273,7 @@ class Kamal::Cli::App < Kamal::Cli::Base
   def version
     on(KAMAL.hosts) do |host|
       role = KAMAL.roles_on(host).first
-      puts_by_host host, capture_with_info(*KAMAL.app(role: role).current_running_version).strip
+      puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).current_running_version).strip
     end
   end
 
@@ -289,23 +296,20 @@ class Kamal::Cli::App < Kamal::Cli::Base
       version = nil
       on(host) do
         role = KAMAL.roles_on(host).first
-        version = capture_with_info(*KAMAL.app(role: role).current_running_version).strip
+        version = capture_with_info(*KAMAL.app(role: role, host: host).current_running_version).strip
       end
       version.presence
     end
 
-    def stale_versions(host:, role:)
+    def version_or_latest
-      versions = nil
+      options[:version] || KAMAL.config.latest_tag
-      on(host) do
-        versions = \
-          capture_with_info(*KAMAL.app(role: role).list_versions, raise_on_non_zero_exit: false)
-          .split("\n")
-          .drop(1)
-      end
-      versions
     end
 
-    def version_or_latest
+    def with_lock_if_stopping
-      options[:version] || "latest"
+      if options[:stop]
+        with_lock { yield }
+      else
+        yield
+      end
     end
 end

lib/kamal/cli/app/barrier.rb

@@ -0,0 +1,31 @@
+class Kamal::Cli::App::Barrier
+  def initialize
+    @ivar = Concurrent::IVar.new
+  end
+
+  def close
+    set(false)
+  end
+
+  def open
+    set(true)
+  end
+
+  def wait
+    unless opened?
+      raise Kamal::Cli::BootError.new("Halted at barrier")
+    end
+  end
+
+  private
+    def opened?
+      @ivar.value
+    end
+
+    def set(value)
+      @ivar.set(value)
+      true
+    rescue Concurrent::MultipleAssignmentError
+      false
+    end
+end

lib/kamal/cli/app/boot.rb

@@ -0,0 +1,111 @@
+class Kamal::Cli::App::Boot
+  attr_reader :host, :role, :version, :barrier, :sshkit
+  delegate :execute, :capture_with_info, :capture_with_pretty_json, :info, :error, to: :sshkit
+  delegate :assets?, :running_proxy?, to: :role
+
+  def initialize(host, role, sshkit, version, barrier)
+    @host = host
+    @role = role
+    @version = version
+    @barrier = barrier
+    @sshkit = sshkit
+  end
+
+  def run
+    old_version = old_version_renamed_if_clashing
+
+    wait_at_barrier if queuer?
+
+    begin
+      start_new_version
+    rescue => e
+      close_barrier if gatekeeper?
+      stop_new_version
+      raise
+    end
+
+    release_barrier if gatekeeper?
+
+    if old_version
+      stop_old_version(old_version)
+    end
+  end
+
+  private
+    def old_version_renamed_if_clashing
+      if capture_with_info(*app.container_id_for_version(version), raise_on_non_zero_exit: false).present?
+        renamed_version = "#{version}_replaced_#{SecureRandom.hex(8)}"
+        info "Renaming container #{version} to #{renamed_version} as already deployed on #{host}"
+        audit("Renaming container #{version} to #{renamed_version}")
+        execute *app.rename_container(version: version, new_version: renamed_version)
+      end
+
+      capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip.presence
+    end
+
+    def start_new_version
+      audit "Booted app version #{version}"
+      hostname = "#{host.to_s[0...51].gsub(/\.+$/, '')}-#{SecureRandom.hex(6)}"
+      execute *app.run(hostname: hostname)
+      if running_proxy?
+        endpoint = capture_with_info(*app.container_endpoint(version: version)).strip
+        raise Kamal::Cli::BootError, "Failed to get endpoint for #{role} on #{host}, did the container boot?" if endpoint.empty?
+        execute *KAMAL.proxy.deploy(role.container_prefix, target: endpoint)
+      end
+    end
+
+    def stop_new_version
+      execute *app.stop(version: version), raise_on_non_zero_exit: false
+    end
+
+    def stop_old_version(version)
+      execute *app.stop(version: version), raise_on_non_zero_exit: false
+      execute *app.clean_up_assets if assets?
+    end
+
+    def release_barrier
+      if barrier.open
+        info "First #{KAMAL.primary_role} container is healthy on #{host}, booting other roles"
+      end
+    end
+
+    def wait_at_barrier
+      info "Waiting for the first healthy #{KAMAL.primary_role} container before booting #{role} on #{host}..."
+      barrier.wait
+      info "First #{KAMAL.primary_role} container is healthy, booting #{role} on #{host}..."
+    rescue Kamal::Cli::BootError
+      info "First #{KAMAL.primary_role} container is unhealthy, not booting #{role} on #{host}"
+      raise
+    end
+
+    def close_barrier
+      if barrier.close
+        info "First #{KAMAL.primary_role} container is unhealthy on #{host}, not booting other roles"
+        error capture_with_info(*app.logs(version: version))
+      end
+    end
+
+    def barrier_role?
+      role == KAMAL.primary_role
+    end
+
+    def app
+      @app ||= KAMAL.app(role: role, host: host)
+    end
+
+    def auditor
+      @auditor = KAMAL.auditor(role: role)
+    end
+
+    def audit(message)
+      execute *auditor.record(message), verbosity: :debug
+    end
+
+    def gatekeeper?
+      barrier && barrier_role?
+    end
+
+    def queuer?
+      barrier && !barrier_role?
+    end
+end

lib/kamal/cli/app/prepare_assets.rb

@@ -0,0 +1,24 @@
+class Kamal::Cli::App::PrepareAssets
+  attr_reader :host, :role, :sshkit
+  delegate :execute, :capture_with_info, :info, to: :sshkit
+  delegate :assets?, to: :role
+
+  def initialize(host, role, sshkit)
+    @host = host
+    @role = role
+    @sshkit = sshkit
+  end
+
+  def run
+    if assets?
+      execute *app.extract_assets
+      old_version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
+      execute *app.sync_asset_volumes(old_version: old_version)
+    end
+  end
+
+  private
+    def app
+      @app ||= KAMAL.app(role: role, host: host)
+    end
+end

lib/kamal/cli/base.rb

@@ -14,8 +14,8 @@ module Kamal::Cli
     class_option :version, desc: "Run commands against a specific app version"
 
     class_option :primary, type: :boolean, aliases: "-p", desc: "Run commands only on primary host instead of all"
-    class_option :hosts, aliases: "-h", desc: "Run commands on these hosts instead of all (separate by comma)"
+    class_option :hosts, aliases: "-h", desc: "Run commands on these hosts instead of all (separate by comma, supports wildcards with *)"
-    class_option :roles, aliases: "-r", desc: "Run commands on these roles instead of all (separate by comma)"
+    class_option :roles, aliases: "-r", desc: "Run commands on these roles instead of all (separate by comma, supports wildcards with *)"
 
     class_option :config_file, aliases: "-c", default: "config/deploy.yml", desc: "Path to config file"
     class_option :destination, aliases: "-d", desc: "Specify destination to be used for config file (staging -> deploy.staging.yml)"
@@ -24,6 +24,7 @@ module Kamal::Cli
 
     def initialize(*)
       super
+      @original_env = ENV.to_h.dup
       load_envs
       initialize_commander(options_with_subcommand_class_options)
     end
@@ -37,6 +38,12 @@ module Kamal::Cli
         end
       end
 
+      def reload_envs
+        ENV.clear
+        ENV.update(@original_env)
+        load_envs
+      end
+
       def options_with_subcommand_class_options
         options.merge(@_initializer.last[:class_options] || {})
       end
@@ -66,36 +73,43 @@ module Kamal::Cli
       def print_runtime
         started_at = Time.now
         yield
-        return Time.now - started_at
+        Time.now - started_at
       ensure
         runtime = Time.now - started_at
         puts "  Finished all in #{sprintf("%.1f seconds", runtime)}"
       end
 
-      def mutating
+      def with_lock
-        return yield if KAMAL.holding_lock?
+        if KAMAL.holding_lock?
-
-        KAMAL.config.ensure_env_available
-
-        run_hook "pre-connect"
-
-        ensure_run_directory
-
-        acquire_lock
-
-        begin
           yield
-        rescue
+        else
-          if KAMAL.hold_lock_on_error?
+          ensure_run_and_locks_directory
-            error "  \e[31mDeploy lock was not released\e[0m"
+
-          else
+          acquire_lock
-            release_lock
+
+          begin
+            yield
+          rescue
+            begin
+              release_lock
+            rescue => e
+              say "Error releasing the deploy lock: #{e.message}", :red
+            end
+            raise
           end
 
-          raise
+          release_lock
         end
+      end
 
-        release_lock
+      def confirming(question)
+        return yield if options[:confirmed]
+
+        if ask(question, limited_to: %w[ y N ], default: "N") == "y"
+          yield
+        else
+          say "Aborted", :red
+        end
       end
 
       def acquire_lock
@@ -118,36 +132,36 @@ module Kamal::Cli
         yield
       rescue SSHKit::Runner::ExecuteError => e
         if e.message =~ /cannot create directory/
+          say "Deploy lock already in place!", :red
           on(KAMAL.primary_host) { puts capture_with_debug(*KAMAL.lock.status) }
-          raise LockError, "Deploy lock found"
+          raise LockError, "Deploy lock found. Run 'kamal lock help' for more information"
         else
           raise e
         end
       end
 
-      def hold_lock_on_error
-        if KAMAL.hold_lock_on_error?
-          yield
-        else
-          KAMAL.hold_lock_on_error = true
-          yield
-          KAMAL.hold_lock_on_error = false
-        end
-      end
-
       def run_hook(hook, **extra_details)
         if !options[:skip_hooks] && KAMAL.hook.hook_exists?(hook)
           details = { hosts: KAMAL.hosts.join(","), command: command, subcommand: subcommand }
 
           say "Running the #{hook} hook...", :magenta
           run_locally do
-            KAMAL.with_verbosity(:debug) { execute *KAMAL.hook.run(hook, **details, **extra_details) }
+            execute *KAMAL.hook.run(hook, **details, **extra_details)
-          rescue SSHKit::Command::Failed
+          rescue SSHKit::Command::Failed => e
-            raise HookError.new("Hook `#{hook}` failed")
+            raise HookError.new("Hook `#{hook}` failed:\n#{e.message}")
           end
         end
       end
 
+      def on(*args, &block)
+        if !KAMAL.connected?
+          run_hook "pre-connect"
+          KAMAL.connected = true
+        end
+
+        super
+      end
+
       def command
         @kamal_command ||= begin
           invocation_class, invocation_commands = *first_invocation
@@ -170,10 +184,14 @@ module Kamal::Cli
         instance_variable_get("@_invocations").first
       end
 
-      def ensure_run_directory
+      def ensure_run_and_locks_directory
         on(KAMAL.hosts) do
           execute(*KAMAL.server.ensure_run_directory)
         end
+
+        on(KAMAL.primary_host) do
+          execute(*KAMAL.lock.ensure_locks_directory)
+        end
       end
-    end
+  end
 end

lib/kamal/cli/build.rb

@@ -1,41 +1,54 @@
+require "uri"
+
 class Kamal::Cli::Build < Kamal::Cli::Base
   class BuildError < StandardError; end
 
   desc "deliver", "Build app and push app image to registry then pull image on servers"
   def deliver
-    mutating do
+    push
-      push
+    pull
-      pull
-    end
   end
 
   desc "push", "Build and push app image to registry"
   def push
-    mutating do
+    cli = self
-      cli = self
 
-      verify_local_dependencies
+    verify_local_dependencies
-      run_hook "pre-build"
+    run_hook "pre-build"
 
-      if (uncommitted_changes = Kamal::Utils.uncommitted_changes).present?
+    uncommitted_changes = Kamal::Git.uncommitted_changes
-        say "The following paths have uncommitted changes:\n #{uncommitted_changes}", :yellow
+
+    if KAMAL.config.builder.git_clone?
+      if uncommitted_changes.present?
+        say "Building from a local git clone, so ignoring these uncommitted changes:\n #{uncommitted_changes}", :yellow
       end
 
       run_locally do
-        begin
+        Clone.new(self).prepare
-          KAMAL.with_verbosity(:debug) do
+      end
-            execute *KAMAL.builder.push
+    elsif uncommitted_changes.present?
-          end
+      say "Building with uncommitted changes:\n #{uncommitted_changes}", :yellow
-        rescue SSHKit::Command::Failed => e
+    end
-          if e.message =~ /(no builder)|(no such file or directory)/
-            error "Missing compatible builder, so creating a new one first"
 
-            if cli.create
+    # Get the command here to ensure the Dir.chdir doesn't interfere with it
-              KAMAL.with_verbosity(:debug) { execute *KAMAL.builder.push }
+    push = KAMAL.builder.push
+
+    run_locally do
+      begin
+        KAMAL.with_verbosity(:debug) do
+          Dir.chdir(KAMAL.config.builder.build_directory) { execute *push }
+        end
+      rescue SSHKit::Command::Failed => e
+        if e.message =~ /(no builder)|(no such file or directory)/
+          warn "Missing compatible builder, so creating a new one first"
+
+          if cli.create
+            KAMAL.with_verbosity(:debug) do
+              Dir.chdir(KAMAL.config.builder.build_directory) { execute *push }
             end
-          else
-            raise
           end
+        else
+          raise
         end
       end
     end
@@ -43,29 +56,30 @@ class Kamal::Cli::Build < Kamal::Cli::Base
 
   desc "pull", "Pull app image from registry onto servers"
   def pull
-    mutating do
+    on(KAMAL.hosts) do
-      on(KAMAL.hosts) do
+      execute *KAMAL.auditor.record("Pulled image with version #{KAMAL.config.version}"), verbosity: :debug
-        execute *KAMAL.auditor.record("Pulled image with version #{KAMAL.config.version}"), verbosity: :debug
+      execute *KAMAL.builder.clean, raise_on_non_zero_exit: false
-        execute *KAMAL.builder.clean, raise_on_non_zero_exit: false
+      execute *KAMAL.builder.pull
-        execute *KAMAL.builder.pull
+      execute *KAMAL.builder.validate_image
-      end
     end
   end
 
   desc "create", "Create a build setup"
   def create
-    mutating do
+    if (remote_host = KAMAL.config.builder.remote_host)
-      run_locally do
+      connect_to_remote_host(remote_host)
-        begin
+    end
-          debug "Using builder: #{KAMAL.builder.name}"
+
-          execute *KAMAL.builder.create
+    run_locally do
-        rescue SSHKit::Command::Failed => e
+      begin
-          if e.message =~ /stderr=(.*)/
+        debug "Using builder: #{KAMAL.builder.name}"
-            error "Couldn't create remote builder: #{$1}"
+        execute *KAMAL.builder.create
-            false
+      rescue SSHKit::Command::Failed => e
-          else
+        if e.message =~ /stderr=(.*)/
-            raise
+          error "Couldn't create remote builder: #{$1}"
-          end
+          false
+        else
+          raise
         end
       end
     end
@@ -73,11 +87,9 @@ class Kamal::Cli::Build < Kamal::Cli::Base
 
   desc "remove", "Remove build setup"
   def remove
-    mutating do
+    run_locally do
-      run_locally do
+      debug "Using builder: #{KAMAL.builder.name}"
-        debug "Using builder: #{KAMAL.builder.name}"
+      execute *KAMAL.builder.remove
-        execute *KAMAL.builder.remove
-      end
     end
   end
 
@@ -103,4 +115,17 @@ class Kamal::Cli::Build < Kamal::Cli::Base
         end
       end
     end
+
+    def connect_to_remote_host(remote_host)
+      remote_uri = URI.parse(remote_host)
+      if remote_uri.scheme == "ssh"
+        host = SSHKit::Host.new(
+          hostname: remote_uri.host,
+          ssh_options: { user: remote_uri.user, port: remote_uri.port }.compact
+        )
+        on(host, options) do
+          execute "true"
+        end
+      end
+    end
 end

lib/kamal/cli/build/clone.rb

@@ -0,0 +1,61 @@
+require "uri"
+
+class Kamal::Cli::Build::Clone
+  attr_reader :sshkit
+  delegate :info, :error, :execute, :capture_with_info, to: :sshkit
+
+  def initialize(sshkit)
+    @sshkit = sshkit
+  end
+
+  def prepare
+    begin
+      clone_repo
+    rescue SSHKit::Command::Failed => e
+      if e.message =~ /already exists and is not an empty directory/
+        reset
+      else
+        raise Kamal::Cli::Build::BuildError, "Failed to clone repo: #{e.message}"
+      end
+    end
+
+    validate!
+  rescue Kamal::Cli::Build::BuildError => e
+    error "Error preparing clone: #{e.message}, deleting and retrying..."
+
+    FileUtils.rm_rf KAMAL.config.builder.clone_directory
+    clone_repo
+    validate!
+  end
+
+  private
+    def clone_repo
+      info "Cloning repo into build directory `#{KAMAL.config.builder.build_directory}`..."
+
+      FileUtils.mkdir_p KAMAL.config.builder.clone_directory
+      execute *KAMAL.builder.clone
+    end
+
+    def reset
+      info "Resetting local clone as `#{KAMAL.config.builder.build_directory}` already exists..."
+
+      KAMAL.builder.clone_reset_steps.each { |step| execute *step }
+    rescue SSHKit::Command::Failed => e
+      raise Kamal::Cli::Build::BuildError, "Failed to clone repo: #{e.message}"
+    end
+
+    def validate!
+      status = capture_with_info(*KAMAL.builder.clone_status).strip
+
+      unless status.empty?
+        raise Kamal::Cli::Build::BuildError, "Clone in #{KAMAL.config.builder.build_directory} is dirty, #{status}"
+      end
+
+      revision = capture_with_info(*KAMAL.builder.clone_revision).strip
+      if revision != Kamal::Git.revision
+        raise Kamal::Cli::Build::BuildError, "Clone in #{KAMAL.config.builder.build_directory} is not on the correct revision, expected `#{Kamal::Git.revision}` but got `#{revision}`"
+      end
+    rescue SSHKit::Command::Failed => e
+      raise Kamal::Cli::Build::BuildError, "Failed to validate clone: #{e.message}"
+    end
+end

lib/kamal/cli/env.rb

@@ -3,25 +3,21 @@ require "tempfile"
 class Kamal::Cli::Env < Kamal::Cli::Base
   desc "push", "Push the env file to the remote hosts"
   def push
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do
-        KAMAL.roles_on(host).each do |role|
+        execute *KAMAL.auditor.record("Pushed env files"), verbosity: :debug
-          role_config = KAMAL.config.role(role)
-          execute *KAMAL.app(role: role).make_env_directory
-          upload! StringIO.new(role_config.env_file), role_config.host_env_file_path, mode: 400
-        end
-      end
 
-      on(KAMAL.traefik_hosts) do
+        KAMAL.roles_on(host).each do |role|
-        execute *KAMAL.traefik.make_env_directory
+          execute *KAMAL.app(role: role, host: host).make_env_directory
-        upload! StringIO.new(KAMAL.traefik.env_file), KAMAL.traefik.host_env_file_path, mode: 400
+          upload! role.env(host).secrets_io, role.env(host).secrets_file, mode: 400
+        end
       end
 
       on(KAMAL.accessory_hosts) do
         KAMAL.accessories_on(host).each do |accessory|
           accessory_config = KAMAL.config.accessory(accessory)
           execute *KAMAL.accessory(accessory).make_env_directory
-          upload! StringIO.new(accessory_config.env_file), accessory_config.host_env_file_path, mode: 400
+          upload! accessory_config.env.secrets_io, accessory_config.env.secrets_file, mode: 400
         end
       end
     end
@@ -29,16 +25,13 @@ class Kamal::Cli::Env < Kamal::Cli::Base
 
   desc "delete", "Delete the env file from the remote hosts"
   def delete
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do
-        KAMAL.roles_on(host).each do |role|
+        execute *KAMAL.auditor.record("Deleted env files"), verbosity: :debug
-          role_config = KAMAL.config.role(role)
-          execute *KAMAL.app(role: role).remove_env_file
-        end
-      end
 
-      on(KAMAL.traefik_hosts) do
+        KAMAL.roles_on(host).each do |role|
-        execute *KAMAL.traefik.remove_env_file
+          execute *KAMAL.app(role: role, host: host).remove_env_file
+        end
       end
 
       on(KAMAL.accessory_hosts) do

lib/kamal/cli/healthcheck.rb

@@ -1,20 +0,0 @@
-class Kamal::Cli::Healthcheck < Kamal::Cli::Base
-  default_command :perform
-
-  desc "perform", "Health check current app version"
-  def perform
-    on(KAMAL.primary_host) do
-      begin
-        execute *KAMAL.healthcheck.run
-        Kamal::Utils::HealthcheckPoller.wait_for_healthy { capture_with_info(*KAMAL.healthcheck.status) }
-      rescue Kamal::Utils::HealthcheckPoller::HealthcheckError => e
-        error capture_with_info(*KAMAL.healthcheck.logs)
-        error capture_with_pretty_json(*KAMAL.healthcheck.container_health_log)
-        raise
-      ensure
-        execute *KAMAL.healthcheck.stop, raise_on_non_zero_exit: false
-        execute *KAMAL.healthcheck.remove, raise_on_non_zero_exit: false
-      end
-    end
-  end
-end

lib/kamal/cli/main.rb

@@ -1,10 +1,18 @@
 class Kamal::Cli::Main < Kamal::Cli::Base
-  desc "setup", "Setup all accessories and deploy app to servers"
+  desc "setup", "Setup all accessories, push the env, and deploy app to servers"
+  option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip image build and push"
   def setup
     print_runtime do
-      mutating do
+      with_lock do
-        invoke "kamal:cli:server:bootstrap"
+        invoke_options = deploy_options
-        invoke "kamal:cli:accessory:boot", [ "all" ]
+
+        say "Ensure Docker is installed...", :magenta
+        invoke "kamal:cli:server:bootstrap", [], invoke_options
+
+        say "Evaluate and push env files...", :magenta
+        invoke "kamal:cli:main:envify", [], invoke_options
+
+        invoke "kamal:cli:accessory:boot", [ "all" ], invoke_options
         deploy
       end
     end
@@ -14,30 +22,27 @@ class Kamal::Cli::Main < Kamal::Cli::Base
   option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip image build and push"
   def deploy
     runtime = print_runtime do
-      mutating do
+      invoke_options = deploy_options
-        invoke_options = deploy_options
 
-        say "Log into image registry...", :magenta
+      say "Log into image registry...", :magenta
-        invoke "kamal:cli:registry:login", [], invoke_options
+      invoke "kamal:cli:registry:login", [], invoke_options
 
-        if options[:skip_push]
+      if options[:skip_push]
-          say "Pull app image...", :magenta
+        say "Pull app image...", :magenta
-          invoke "kamal:cli:build:pull", [], invoke_options
+        invoke "kamal:cli:build:pull", [], invoke_options
-        else
+      else
-          say "Build and push app image...", :magenta
+        say "Build and push app image...", :magenta
-          invoke "kamal:cli:build:deliver", [], invoke_options
+        invoke "kamal:cli:build:deliver", [], invoke_options
-        end
+      end
 
+      with_lock do
         run_hook "pre-deploy"
 
-        say "Ensure Traefik is running...", :magenta
+        say "Ensure proxy is running...", :magenta
-        invoke "kamal:cli:traefik:boot", [], invoke_options
+        invoke "kamal:cli:proxy:boot", [], invoke_options
-
-        say "Ensure app can pass healthcheck...", :magenta
-        invoke "kamal:cli:healthcheck:perform", [], invoke_options
 
         say "Detect stale containers...", :magenta
-        invoke "kamal:cli:app:stale_containers", [], invoke_options
+        invoke "kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true)
 
         invoke "kamal:cli:app:boot", [], invoke_options
 
@@ -49,28 +54,25 @@ class Kamal::Cli::Main < Kamal::Cli::Base
     run_hook "post-deploy", runtime: runtime.round
   end
 
-  desc "redeploy", "Deploy app to servers without bootstrapping servers, starting Traefik, pruning, and registry login"
+  desc "redeploy", "Deploy app to servers without bootstrapping servers, starting proxy, pruning, and registry login"
   option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip image build and push"
   def redeploy
     runtime = print_runtime do
-      mutating do
+      invoke_options = deploy_options
-        invoke_options = deploy_options
 
-        if options[:skip_push]
+      if options[:skip_push]
-          say "Pull app image...", :magenta
+        say "Pull app image...", :magenta
-          invoke "kamal:cli:build:pull", [], invoke_options
+        invoke "kamal:cli:build:pull", [], invoke_options
-        else
+      else
-          say "Build and push app image...", :magenta
+        say "Build and push app image...", :magenta
-          invoke "kamal:cli:build:deliver", [], invoke_options
+        invoke "kamal:cli:build:deliver", [], invoke_options
-        end
+      end
 
+      with_lock do
         run_hook "pre-deploy"
 
-        say "Ensure app can pass healthcheck...", :magenta
-        invoke "kamal:cli:healthcheck:perform", [], invoke_options
-
         say "Detect stale containers...", :magenta
-        invoke "kamal:cli:app:stale_containers", [], invoke_options
+        invoke "kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true)
 
         invoke "kamal:cli:app:boot", [], invoke_options
       end
@@ -83,7 +85,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
   def rollback(version)
     rolled_back = false
     runtime = print_runtime do
-      mutating do
+      with_lock do
         invoke_options = deploy_options
 
         KAMAL.config.version = version
@@ -105,7 +107,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
 
   desc "details", "Show details about all containers"
   def details
-    invoke "kamal:cli:traefik:details"
+    invoke "kamal:cli:proxy:details"
     invoke "kamal:cli:app:details"
     invoke "kamal:cli:accessory:details", [ "all" ]
   end
@@ -165,6 +167,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
   end
 
   desc "envify", "Create .env by evaluating .env.erb (or .env.staging.erb -> .env.staging when using -d staging)"
+  option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip .env file push"
   def envify
     if destination = options[:destination]
       env_template_path = ".env.#{destination}.erb"
@@ -174,18 +177,24 @@ class Kamal::Cli::Main < Kamal::Cli::Base
       env_path          = ".env"
     end
 
-    File.write(env_path, ERB.new(File.read(env_template_path)).result, perm: 0600)
+    if Pathname.new(File.expand_path(env_template_path)).exist?
+      File.write(env_path, ERB.new(File.read(env_template_path), trim_mode: "-").result, perm: 0600)
 
-    load_envs # reload new file
+      unless options[:skip_push]
-    invoke "kamal:cli:env:push", options
+        reload_envs
+        invoke "kamal:cli:env:push", options
+      end
+    else
+      puts "Skipping envify (no #{env_template_path} exist)"
+    end
   end
 
-  desc "remove", "Remove Traefik, app, accessories, and registry session from servers"
+  desc "remove", "Remove proxy, app, accessories, and registry session from servers"
   option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
   def remove
-    mutating do
+    confirming "This will remove all containers and images. Are you sure?" do
-      if options[:confirmed] || ask("This will remove all containers and images. Are you sure?", limited_to: %w( y N ), default: "N") == "y"
+      with_lock do
-        invoke "kamal:cli:traefik:remove", [], options.without(:confirmed)
+        invoke "kamal:cli:proxy:remove", [], options.without(:confirmed)
         invoke "kamal:cli:app:remove", [], options.without(:confirmed)
         invoke "kamal:cli:accessory:remove", [ "all" ], options
         invoke "kamal:cli:registry:logout", [], options.without(:confirmed)
@@ -210,9 +219,6 @@ class Kamal::Cli::Main < Kamal::Cli::Base
   desc "env", "Manage environment files"
   subcommand "env", Kamal::Cli::Env
 
-  desc "healthcheck", "Healthcheck application"
-  subcommand "healthcheck", Kamal::Cli::Healthcheck
-
   desc "lock", "Manage the deploy lock"
   subcommand "lock", Kamal::Cli::Lock
 
@@ -225,19 +231,19 @@ class Kamal::Cli::Main < Kamal::Cli::Base
   desc "server", "Bootstrap servers with curl and Docker"
   subcommand "server", Kamal::Cli::Server
 
-  desc "traefik", "Manage Traefik load balancer"
+  desc "proxy", "Manage load balancer proxy"
-  subcommand "traefik", Kamal::Cli::Traefik
+  subcommand "proxy", Kamal::Cli::Proxy
 
   private
     def container_available?(version)
       begin
         on(KAMAL.hosts) do
           KAMAL.roles_on(host).each do |role|
-            container_id = capture_with_info(*KAMAL.app(role: role).container_id_for_version(version))
+            container_id = capture_with_info(*KAMAL.app(role: role, host: host).container_id_for_version(version))
             raise "Container not found" unless container_id.present?
           end
         end
-      rescue SSHKit::Runner::ExecuteError => e
+      rescue SSHKit::Runner::ExecuteError, SSHKit::Runner::MultipleExecuteError => e
         if e.message =~ /Container not found/
           say "Error looking for container version #{version}: #{e.message}"
           return false

lib/kamal/cli/proxy.rb

@@ -0,0 +1,164 @@
+class Kamal::Cli::Proxy < Kamal::Cli::Base
+  desc "boot", "Boot proxy on servers"
+  def boot
+    with_lock do
+      on(KAMAL.proxy_hosts) do
+        execute *KAMAL.registry.login
+        execute *KAMAL.proxy.start_or_run
+      end
+    end
+  end
+
+  desc "reboot", "Reboot proxy on servers (stop container, remove container, start new container)"
+  option :rolling, type: :boolean, default: false, desc: "Reboot proxy on hosts in sequence, rather than in parallel"
+  option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
+  def reboot
+    confirming "This will cause a brief outage on each host. Are you sure?" do
+      with_lock do
+        host_groups = options[:rolling] ? KAMAL.proxy_hosts : [ KAMAL.proxy_hosts ]
+        host_groups.each do |hosts|
+          host_list = Array(hosts).join(",")
+          run_hook "pre-proxy-reboot", hosts: host_list
+          on(hosts) do
+            execute *KAMAL.auditor.record("Rebooted proxy"), verbosity: :debug
+            execute *KAMAL.registry.login
+            execute *KAMAL.proxy.stop, raise_on_non_zero_exit: false
+            execute *KAMAL.proxy.remove_container
+            execute *KAMAL.proxy.run
+          end
+          run_hook "post-proxy-reboot", hosts: host_list
+        end
+      end
+    end
+  end
+
+  desc "start", "Start existing proxy container on servers"
+  def start
+    with_lock do
+      on(KAMAL.proxy_hosts) do
+        execute *KAMAL.auditor.record("Started proxy"), verbosity: :debug
+        execute *KAMAL.proxy.start
+      end
+    end
+  end
+
+  desc "stop", "Stop existing proxy container on servers"
+  def stop
+    with_lock do
+      on(KAMAL.proxy_hosts) do
+        execute *KAMAL.auditor.record("Stopped proxy"), verbosity: :debug
+        execute *KAMAL.proxy.stop, raise_on_non_zero_exit: false
+      end
+    end
+  end
+
+  desc "restart", "Restart existing proxy container on servers"
+  def restart
+    with_lock do
+      stop
+      start
+    end
+  end
+
+  desc "update", "Update from Traefik to kamal-proxy, for when moving from Kamal v1 to Kamal v2"
+  option :rolling, type: :boolean, default: false, desc: "Reboot proxy on hosts in sequence, rather than in parallel"
+  option :confirmed, aliases: "-y", type: :boolean, default: false, desc: "Proceed without confirmation question"
+  def update
+    confirming "This will cause a brief outage on each host. Are you sure?" do
+      with_lock do
+        host_groups = options[:rolling] ? KAMAL.proxy_hosts : [ KAMAL.proxy_hosts ]
+        host_groups.each do |hosts|
+          host_list = Array(hosts).join(",")
+          run_hook "pre-proxy-reboot", hosts: host_list
+          on(hosts) do
+            info "Updating proxy from Traefik to kamal-proxy on #{host}..."
+            execute *KAMAL.auditor.record("Updated proxy from Traefik to kamal-proxy"), verbosity: :debug
+            execute *KAMAL.registry.login
+
+            info "Stopping and removing Traefik on #{host}..."
+            execute *KAMAL.proxy.stop(name: "traefik"), raise_on_non_zero_exit: false
+            execute *KAMAL.proxy.remove_container(filter: "label=org.opencontainers.image.title=traefik")
+            execute *KAMAL.proxy.remove_image(filter: "label=org.opencontainers.image.title=traefik")
+
+            info "Stopping and removing kamal-proxy on #{host}, if running..."
+            execute *KAMAL.proxy.stop, raise_on_non_zero_exit: false
+            execute *KAMAL.proxy.remove_container
+
+            info "Starting kamal-proxy on #{host}..."
+            execute *KAMAL.proxy.run
+
+            KAMAL.roles_on(host).select(&:running_proxy?).each do |role|
+              app = KAMAL.app(role: role, host: host)
+
+              version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
+              endpoint = capture_with_info(*app.container_endpoint(version: version)).strip
+              raise Kamal::Cli::BootError, "Failed to get endpoint for #{role} on #{host}, is the app container running?" if endpoint.empty?
+
+              info "Deploying #{endpoint} for role `#{role}` on #{host}..."
+              execute *KAMAL.proxy.deploy(role.container_prefix, target: endpoint)
+            end
+          end
+          run_hook "post-proxy-reboot", hosts: host_list
+        end
+      end
+    end
+  end
+
+  desc "details", "Show details about proxy container from servers"
+  def details
+    on(KAMAL.proxy_hosts) { |host| puts_by_host host, capture_with_info(*KAMAL.proxy.info), type: "Proxy" }
+  end
+
+  desc "logs", "Show log lines from proxy on servers"
+  option :since, aliases: "-s", desc: "Show logs since timestamp (e.g. 2013-01-02T13:23:37Z) or relative (e.g. 42m for 42 minutes)"
+  option :lines, type: :numeric, aliases: "-n", desc: "Number of log lines to pull from each server"
+  option :grep, aliases: "-g", desc: "Show lines with grep match only (use this to fetch specific requests by id)"
+  option :follow, aliases: "-f", desc: "Follow logs on primary server (or specific host set by --hosts)"
+  def logs
+    grep = options[:grep]
+
+    if options[:follow]
+      run_locally do
+        info "Following logs on #{KAMAL.primary_host}..."
+        info KAMAL.proxy.follow_logs(host: KAMAL.primary_host, grep: grep)
+        exec KAMAL.proxy.follow_logs(host: KAMAL.primary_host, grep: grep)
+      end
+    else
+      since = options[:since]
+      lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
+
+      on(KAMAL.proxy_hosts) do |host|
+        puts_by_host host, capture(*KAMAL.proxy.logs(since: since, lines: lines, grep: grep)), type: "Proxy"
+      end
+    end
+  end
+
+  desc "remove", "Remove proxy container and image from servers"
+  def remove
+    with_lock do
+      stop
+      remove_container
+      remove_image
+    end
+  end
+
+  desc "remove_container", "Remove proxy container from servers", hide: true
+  def remove_container
+    with_lock do
+      on(KAMAL.proxy_hosts) do
+        execute *KAMAL.auditor.record("Removed proxy container"), verbosity: :debug
+        execute *KAMAL.proxy.remove_container
+      end
+    end
+  end
+
+  desc "remove_image", "Remove proxy image from servers", hide: true
+  def remove_image
+    with_lock do
+      on(KAMAL.proxy_hosts) do
+        execute *KAMAL.auditor.record("Removed proxy image"), verbosity: :debug
+        execute *KAMAL.proxy.remove_image
+      end
+    end
+  end
+end

lib/kamal/cli/prune.rb

@@ -1,15 +1,15 @@
 class Kamal::Cli::Prune < Kamal::Cli::Base
   desc "all", "Prune unused images and stopped containers"
   def all
-    mutating do
+    with_lock do
       containers
       images
     end
   end
 
-  desc "images", "Prune dangling images"
+  desc "images", "Prune unused images"
   def images
-    mutating do
+    with_lock do
       on(KAMAL.hosts) do
         execute *KAMAL.auditor.record("Pruned images"), verbosity: :debug
         execute *KAMAL.prune.dangling_images
@@ -18,12 +18,16 @@ class Kamal::Cli::Prune < Kamal::Cli::Base
     end
   end
 
-  desc "containers", "Prune all stopped containers, except the last 5"
+  desc "containers", "Prune all stopped containers, except the last n (default 5)"
+  option :retain, type: :numeric, default: nil, desc: "Number of containers to retain"
   def containers
-    mutating do
+    retain = options.fetch(:retain, KAMAL.config.retain_containers)
+    raise "retain must be at least 1" if retain < 1
+
+    with_lock do
       on(KAMAL.hosts) do
         execute *KAMAL.auditor.record("Pruned containers"), verbosity: :debug
-        execute *KAMAL.prune.containers
+        execute *KAMAL.prune.app_containers(retain: retain)
       end
     end
   end

lib/kamal/cli/server.rb

@@ -1,25 +1,49 @@
 class Kamal::Cli::Server < Kamal::Cli::Base
-  desc "bootstrap", "Set up Docker to run Kamal apps"
+  desc "exec", "Run a custom command on the server (use --help to show options)"
-  def bootstrap
+  option :interactive, type: :boolean, aliases: "-i", default: false, desc: "Run the command interactively (use for console/bash)"
-    missing = []
+  def exec(cmd)
+    hosts = KAMAL.hosts | KAMAL.accessory_hosts
 
-    on(KAMAL.hosts | KAMAL.accessory_hosts) do |host|
+    case
-      unless execute(*KAMAL.docker.installed?, raise_on_non_zero_exit: false)
+    when options[:interactive]
-        if execute(*KAMAL.docker.superuser?, raise_on_non_zero_exit: false)
+      host = KAMAL.primary_host
-          info "Missing Docker on #{host}. Installing…"
+
-          execute *KAMAL.docker.install
+      say "Running '#{cmd}' on #{host} interactively...", :magenta
-        else
+
-          missing << host
+      run_locally { exec KAMAL.server.run_over_ssh(cmd, host: host) }
-        end
+    else
+      say "Running '#{cmd}' on #{hosts.join(', ')}...", :magenta
+
+      on(hosts) do |host|
+        execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on #{host}"), verbosity: :debug
+        puts_by_host host, capture_with_info(cmd)
       end
     end
+  end
 
-    on(KAMAL.hosts) do
+  desc "bootstrap", "Set up Docker to run Kamal apps"
-      execute(*KAMAL.server.ensure_run_directory)
+  def bootstrap
-    end
+    with_lock do
+      missing = []
 
-    if missing.any?
+      on(KAMAL.hosts | KAMAL.accessory_hosts) do |host|
-      raise "Docker is not installed on #{missing.join(", ")} and can't be automatically installed without having root access and the `curl` command available. Install Docker manually: https://docs.docker.com/engine/install/"
+        unless execute(*KAMAL.docker.installed?, raise_on_non_zero_exit: false)
+          if execute(*KAMAL.docker.superuser?, raise_on_non_zero_exit: false)
+            info "Missing Docker on #{host}. Installing…"
+            execute *KAMAL.docker.install
+          else
+            missing << host
+          end
+        end
+
+        execute(*KAMAL.server.ensure_run_directory)
+      end
+
+      if missing.any?
+        raise "Docker is not installed on #{missing.join(", ")} and can't be automatically installed without having root access and either `wget` or `curl`. Install Docker manually: https://docs.docker.com/engine/install/"
+      end
+
+      run_hook "docker-setup"
     end
   end
 end

lib/kamal/cli/templates/deploy.yml

@@ -19,6 +19,7 @@ registry:
     - KAMAL_REGISTRY_PASSWORD
 
 # Inject ENV variables into containers (secrets come from .env).
+# Remember to run `kamal env push` after making changes!
 # env:
 #   clear:
 #     DB_HOST: 192.168.0.2
@@ -52,7 +53,7 @@ registry:
 #         - MYSQL_ROOT_PASSWORD
 #     files:
 #       - config/mysql/production.cnf:/etc/mysql/my.cnf
-#       - db/production.sql.erb:/docker-entrypoint-initdb.d/setup.sql
+#       - db/production.sql:/docker-entrypoint-initdb.d/setup.sql
 #     directories:
 #       - data:/var/lib/mysql
 #   redis:
@@ -62,13 +63,28 @@ registry:
 #     directories:
 #       - data:/data
 
-# Configure custom arguments for Traefik
+# Bridge fingerprinted assets, like JS and CSS, between versions to avoid
-# traefik:
+# hitting 404 on in-flight requests. Combines all files from new and old
-#   args:
+# version inside the asset_path.
-#     accesslog: true
+#
-#     accesslog.format: json
+# If your app is using the Sprockets gem, ensure it sets `config.assets.manifest`.
+# See https://github.com/basecamp/kamal/issues/626 for details
+#
+# asset_path: /rails/public/assets
 
-# Configure a custom healthcheck (default is /up on port 3000)
+# Configure rolling deploys by setting a wait time between batches of restarts.
-# healthcheck:
+# boot:
-#   path: /healthz
+#   limit: 10 # Can also specify as a percentage of total hosts, such as "25%"
-#   port: 4000
+#   wait: 2
+
+# Configure the role used to determine the primary_host. This host takes
+# deploy locks, runs health checks during the deploy, and follow logs, etc.
+#
+# Caution: there's no support for role renaming yet, so be careful to cleanup
+#          the previous role on the deployed hosts.
+# primary_role: web
+
+# Controls if we abort when see a role with no hosts. Disabling this may be
+# useful for more complex deploy configurations.
+#
+# allow_empty_roles: false

lib/kamal/cli/templates/sample_hooks/docker-setup.sample

@@ -0,0 +1,7 @@
+#!/usr/bin/env ruby
+
+# A sample docker-setup hook
+#
+# Sets up a Docker network which can then be used by the application’s containers
+
+ssh user@example.com docker network create kamal

lib/kamal/cli/templates/sample_hooks/post-proxy-reboot.sample

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "Rebooted proxy on $KAMAL_HOSTS"

lib/kamal/cli/templates/sample_hooks/pre-build.sample

@@ -32,7 +32,7 @@ fi
 current_branch=$(git branch --show-current)
 
 if [ -z "$current_branch" ]; then
-  echo "No git remote set, aborting..." >&2
+  echo "Not on a git branch, aborting..." >&2
   exit 1
 fi
 

lib/kamal/cli/templates/sample_hooks/pre-proxy-reboot.sample

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "Rebooting proxy on $KAMAL_HOSTS..."

lib/kamal/cli/traefik.rb

@@ -1,111 +0,0 @@
-class Kamal::Cli::Traefik < Kamal::Cli::Base
-  desc "boot", "Boot Traefik on servers"
-  def boot
-    mutating do
-      on(KAMAL.traefik_hosts) do
-        execute *KAMAL.registry.login
-        execute *KAMAL.traefik.start_or_run
-      end
-    end
-  end
-
-  desc "reboot", "Reboot Traefik on servers (stop container, remove container, start new container)"
-  option :rolling, type: :boolean, default: false, desc: "Reboot traefik on hosts in sequence, rather than in parallel"
-  def reboot
-    mutating do
-      on(KAMAL.traefik_hosts, in: options[:rolling] ? :sequence : :parallel) do
-        execute *KAMAL.auditor.record("Rebooted traefik"), verbosity: :debug
-        execute *KAMAL.registry.login
-        execute *KAMAL.traefik.stop
-        execute *KAMAL.traefik.remove_container
-        execute *KAMAL.traefik.run
-      end
-    end
-  end
-
-  desc "start", "Start existing Traefik container on servers"
-  def start
-    mutating do
-      on(KAMAL.traefik_hosts) do
-        execute *KAMAL.auditor.record("Started traefik"), verbosity: :debug
-        execute *KAMAL.traefik.start
-      end
-    end
-  end
-
-  desc "stop", "Stop existing Traefik container on servers"
-  def stop
-    mutating do
-      on(KAMAL.traefik_hosts) do
-        execute *KAMAL.auditor.record("Stopped traefik"), verbosity: :debug
-        execute *KAMAL.traefik.stop
-      end
-    end
-  end
-
-  desc "restart", "Restart existing Traefik container on servers"
-  def restart
-    mutating do
-      stop
-      start
-    end
-  end
-
-  desc "details", "Show details about Traefik container from servers"
-  def details
-    on(KAMAL.traefik_hosts) { |host| puts_by_host host, capture_with_info(*KAMAL.traefik.info), type: "Traefik" }
-  end
-
-  desc "logs", "Show log lines from Traefik on servers"
-  option :since, aliases: "-s", desc: "Show logs since timestamp (e.g. 2013-01-02T13:23:37Z) or relative (e.g. 42m for 42 minutes)"
-  option :lines, type: :numeric, aliases: "-n", desc: "Number of log lines to pull from each server"
-  option :grep, aliases: "-g", desc: "Show lines with grep match only (use this to fetch specific requests by id)"
-  option :follow, aliases: "-f", desc: "Follow logs on primary server (or specific host set by --hosts)"
-  def logs
-    grep = options[:grep]
-
-    if options[:follow]
-      run_locally do
-        info "Following logs on #{KAMAL.primary_host}..."
-        info KAMAL.traefik.follow_logs(host: KAMAL.primary_host, grep: grep)
-        exec KAMAL.traefik.follow_logs(host: KAMAL.primary_host, grep: grep)
-      end
-    else
-      since = options[:since]
-      lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
-
-      on(KAMAL.traefik_hosts) do |host|
-        puts_by_host host, capture(*KAMAL.traefik.logs(since: since, lines: lines, grep: grep)), type: "Traefik"
-      end
-    end
-  end
-
-  desc "remove", "Remove Traefik container and image from servers"
-  def remove
-    mutating do
-      stop
-      remove_container
-      remove_image
-    end
-  end
-
-  desc "remove_container", "Remove Traefik container from servers", hide: true
-  def remove_container
-    mutating do
-      on(KAMAL.traefik_hosts) do
-        execute *KAMAL.auditor.record("Removed traefik container"), verbosity: :debug
-        execute *KAMAL.traefik.remove_container
-      end
-    end
-  end
-
-  desc "remove_image", "Remove Traefik image from servers", hide: true
-  def remove_image
-    mutating do
-      on(KAMAL.traefik_hosts) do
-        execute *KAMAL.auditor.record("Removed traefik image"), verbosity: :debug
-        execute *KAMAL.traefik.remove_image
-      end
-    end
-  end
-end

lib/kamal/commander.rb

@@ -2,12 +2,14 @@ require "active_support/core_ext/enumerable"
 require "active_support/core_ext/module/delegation"
 
 class Kamal::Commander
-  attr_accessor :verbosity, :holding_lock, :hold_lock_on_error
+  attr_accessor :verbosity, :holding_lock, :connected
+  delegate :hosts, :roles, :primary_host, :primary_role, :roles_on, :proxy_hosts, :accessory_hosts, to: :specifics
 
   def initialize
     self.verbosity = :info
     self.holding_lock = false
-    self.hold_lock_on_error = false
+    self.connected = false
+    @specifics = nil
   end
 
   def config
@@ -24,53 +26,36 @@ class Kamal::Commander
   attr_reader :specific_roles, :specific_hosts
 
   def specific_primary!
-    self.specific_hosts = [ config.primary_web_host ]
+    @specifics = nil
+    self.specific_hosts = [ config.primary_host ]
   end
 
   def specific_roles=(role_names)
-    @specific_roles = config.roles.select { |r| role_names.include?(r.name) } if role_names.present?
+    @specifics = nil
+    if role_names.present?
+      @specific_roles = Kamal::Utils.filter_specific_items(role_names, config.roles)
+
+      if @specific_roles.empty?
+        raise ArgumentError, "No --roles match for #{role_names.join(',')}"
+      end
+
+      @specific_roles
+    end
   end
 
   def specific_hosts=(hosts)
-    @specific_hosts = config.all_hosts & hosts if hosts.present?
+    @specifics = nil
-  end
+    if hosts.present?
+      @specific_hosts = Kamal::Utils.filter_specific_items(hosts, config.all_hosts)
 
-  def primary_host
+      if @specific_hosts.empty?
-    specific_hosts&.first || specific_roles&.first&.primary_host || config.primary_web_host
+        raise ArgumentError, "No --hosts match for #{hosts.join(',')}"
-  end
+      end
 
-  def roles
+      @specific_hosts
-    (specific_roles || config.roles).select do |role|
-      ((specific_hosts || config.all_hosts) & role.hosts).any?
     end
   end
 
-  def hosts
-    (specific_hosts || config.all_hosts).select do |host|
-      (specific_roles || config.roles).flat_map(&:hosts).include?(host)
-    end
-  end
-
-  def boot_strategy
-    if config.boot.limit.present?
-      { in: :groups, limit: config.boot.limit, wait: config.boot.wait }
-    else
-      {}
-    end
-  end
-
-  def roles_on(host)
-    roles.select { |role| role.hosts.include?(host.to_s) }.map(&:name)
-  end
-
-  def traefik_hosts
-    specific_hosts || config.traefik_hosts
-  end
-
-  def accessory_hosts
-    specific_hosts || config.accessories.flat_map(&:hosts)
-  end
-
   def accessory_names
     config.accessories&.collect(&:name) || []
   end
@@ -80,8 +65,8 @@ class Kamal::Commander
   end
 
 
-  def app(role: nil)
+  def app(role: nil, host: nil)
-    Kamal::Commands::App.new(config, role: role)
+    Kamal::Commands::App.new(config, role: role, host: host)
   end
 
   def accessory(name)
@@ -100,10 +85,6 @@ class Kamal::Commander
     @docker ||= Kamal::Commands::Docker.new(config)
   end
 
-  def healthcheck
-    @healthcheck ||= Kamal::Commands::Healthcheck.new(config)
-  end
-
   def hook
     @hook ||= Kamal::Commands::Hook.new(config)
   end
@@ -124,10 +105,11 @@ class Kamal::Commander
     @server ||= Kamal::Commands::Server.new(config)
   end
 
-  def traefik
+  def proxy
-    @traefik ||= Kamal::Commands::Traefik.new(config)
+    @proxy ||= Kamal::Commands::Proxy.new(config)
   end
 
+
   def with_verbosity(level)
     old_level = self.verbosity
 
@@ -140,12 +122,20 @@ class Kamal::Commander
     SSHKit.config.output_verbosity = old_level
   end
 
+  def boot_strategy
+    if config.boot.limit.present?
+      { in: :groups, limit: config.boot.limit, wait: config.boot.wait }
+    else
+      {}
+    end
+  end
+
   def holding_lock?
     self.holding_lock
   end
 
-  def hold_lock_on_error?
+  def connected?
-    self.hold_lock_on_error
+    self.connected
   end
 
   private
@@ -159,4 +149,8 @@ class Kamal::Commander
       SSHKit.config.command_map[:docker] = "docker" # No need to use /usr/bin/env, just clogs up the logs
       SSHKit.config.output_verbosity = verbosity
     end
+
+    def specifics
+      @specifics ||= Kamal::Commander::Specifics.new(config, specific_hosts, specific_roles)
+    end
 end

lib/kamal/commander/specifics.rb

@@ -0,0 +1,49 @@
+class Kamal::Commander::Specifics
+  attr_reader :primary_host, :primary_role, :hosts, :roles
+  delegate :stable_sort!, to: Kamal::Utils
+
+  def initialize(config, specific_hosts, specific_roles)
+    @config, @specific_hosts, @specific_roles = config, specific_hosts, specific_roles
+
+    @roles, @hosts = specified_roles, specified_hosts
+
+    @primary_host = specific_hosts&.first || primary_specific_role&.primary_host || config.primary_host
+    @primary_role = primary_or_first_role(roles_on(primary_host))
+
+    stable_sort!(roles) { |role| role == primary_role ? 0 : 1 }
+    stable_sort!(hosts) { |host| roles_on(host).any? { |role| role == primary_role } ? 0 : 1 }
+  end
+
+  def roles_on(host)
+    roles.select { |role| role.hosts.include?(host.to_s) }
+  end
+
+  def proxy_hosts
+    config.proxy_hosts & specified_hosts
+  end
+
+  def accessory_hosts
+    specific_hosts || config.accessories.flat_map(&:hosts)
+  end
+
+  private
+    attr_reader :config, :specific_hosts, :specific_roles
+
+    def primary_specific_role
+      primary_or_first_role(specific_roles) if specific_roles.present?
+    end
+
+    def primary_or_first_role(roles)
+      roles.detect { |role| role == config.primary_role } || roles.first
+    end
+
+    def specified_roles
+      (specific_roles || config.roles) \
+        .select { |role| ((specific_hosts || config.all_hosts) & role.hosts).any? }
+    end
+
+    def specified_hosts
+      (specific_hosts || config.all_hosts) \
+        .select { |host| (specific_roles || config.roles).flat_map(&:hosts).include?(host) }
+    end
+end

lib/kamal/commands/accessory.rb

@@ -99,11 +99,11 @@ class Kamal::Commands::Accessory < Kamal::Commands::Base
   end
 
   def make_env_directory
-    make_directory accessory_config.host_env_directory
+    make_directory accessory_config.env.secrets_directory
   end
 
   def remove_env_file
-    [:rm, "-f", accessory_config.host_env_file_path]
+    [ :rm, "-f", accessory_config.env.secrets_file ]
   end
 
   private

lib/kamal/commands/app.rb

@@ -1,12 +1,14 @@
 class Kamal::Commands::App < Kamal::Commands::Base
+  include Assets, Containers, Execution, Images, Logging
+
   ACTIVE_DOCKER_STATUSES = [ :running, :restarting ]
 
-  attr_reader :role, :role_config
+  attr_reader :role, :host
 
-  def initialize(config, role: nil)
+  def initialize(config, role: nil, host: nil)
     super(config)
     @role = role
-    @role_config = config.role(self.role)
+    @host = host
   end
 
   def run(hostname: nil)
@@ -14,16 +16,17 @@ class Kamal::Commands::App < Kamal::Commands::Base
       "--detach",
       "--restart unless-stopped",
       "--name", container_name,
-      *(["--hostname", hostname] if hostname),
+      *([ "--hostname", hostname ] if hostname),
       "-e", "KAMAL_CONTAINER_NAME=\"#{container_name}\"",
-      *role_config.env_args,
+      "-e", "KAMAL_VERSION=\"#{config.version}\"",
-      *role_config.health_check_args,
+      *role.env_args(host),
-      *config.logging_args,
+      *role.logging_args,
       *config.volume_args,
-      *role_config.label_args,
+      *role.asset_volume_args,
-      *role_config.option_args,
+      *role.label_args,
+      *role.option_args,
       config.absolute_image,
-      role_config.cmd
+      role.cmd
   end
 
   def start
@@ -45,136 +48,70 @@ class Kamal::Commands::App < Kamal::Commands::Base
   end
 
 
-  def logs(since: nil, lines: nil, grep: nil)
-    pipe \
-      current_running_container_id,
-      "xargs docker logs#{" --since #{since}" if since}#{" --tail #{lines}" if lines} 2>&1",
-      ("grep '#{grep}'" if grep)
-  end
-
-  def follow_logs(host:, grep: nil)
-    run_over_ssh \
-      pipe(
-        current_running_container_id,
-        "xargs docker logs --timestamps --tail 10 --follow 2>&1",
-        (%(grep "#{grep}") if grep)
-      ),
-      host: host
-  end
-
-
-  def execute_in_existing_container(*command, interactive: false)
-    docker :exec,
-      ("-it" if interactive),
-      container_name,
-      *command
-  end
-
-  def execute_in_new_container(*command, interactive: false)
-    docker :run,
-      ("-it" if interactive),
-      "--rm",
-      *role_config&.env_args,
-      *config.volume_args,
-      *role_config&.option_args,
-      config.absolute_image,
-      *command
-  end
-
-  def execute_in_existing_container_over_ssh(*command, host:)
-    run_over_ssh execute_in_existing_container(*command, interactive: true), host: host
-  end
-
-  def execute_in_new_container_over_ssh(*command, host:)
-    run_over_ssh execute_in_new_container(*command, interactive: true), host: host
-  end
-
-
   def current_running_container_id
-    docker :ps, "--quiet", *filter_args(statuses: ACTIVE_DOCKER_STATUSES), "--latest"
+    current_running_container(format: "--quiet")
   end
 
   def container_id_for_version(version, only_running: false)
     container_id_for(container_name: container_name(version), only_running: only_running)
   end
 
+  def container_name(version = nil)
+    [ role.container_prefix, version || config.version ].compact.join("-")
+  end
+
   def current_running_version
-    list_versions("--latest", statuses: ACTIVE_DOCKER_STATUSES)
+    pipe \
+      current_running_container(format: "--format '{{.Names}}'"),
+      extract_version_from_name
   end
 
   def list_versions(*docker_args, statuses: nil)
     pipe \
       docker(:ps, *filter_args(statuses: statuses), *docker_args, "--format", '"{{.Names}}"'),
-      %(while read line; do echo ${line##{role_config.full_name}-}; done) # Extract SHA from "service-role-dest-SHA"
+      extract_version_from_name
   end
 
-  def list_containers
-    docker :container, :ls, "--all", *filter_args
-  end
-
-  def list_container_names
-    [ *list_containers, "--format", "'{{ .Names }}'" ]
-  end
-
-  def remove_container(version:)
-    pipe \
-      container_id_for(container_name: container_name(version)),
-      xargs(docker(:container, :rm))
-  end
-
-  def rename_container(version:, new_version:)
-    docker :rename, container_name(version), container_name(new_version)
-  end
-
-  def remove_containers
-    docker :container, :prune, "--force", *filter_args
-  end
-
-  def list_images
-    docker :image, :ls, config.repository
-  end
-
-  def remove_images
-    docker :image, :prune, "--all", "--force", *filter_args
-  end
-
-  def tag_current_as_latest
-    docker :tag, config.absolute_image, config.latest_image
-  end
 
   def make_env_directory
-    make_directory role_config.host_env_directory
+    make_directory role.env(host).secrets_directory
   end
 
   def remove_env_file
-    [:rm, "-f", role_config.host_env_file_path]
+    [ :rm, "-f", role.env(host).secrets_file ]
   end
 
-  def cord(version:)
-    pipe \
-      docker(:inspect, "-f '{{ range .Mounts }}{{ .Source }} {{ .Destination }} {{ end }}'", container_name(version)),
-      [:awk, "'$2 == \"#{role_config.cord_container_directory}\" {print $1}'"]
-  end
-
-  def tie_cord(cord)
-    create_empty_file(cord)
-  end
-
-  def cut_cord(cord)
-    remove_directory(cord)
-  end
 
   private
     def container_name(version = nil)
-      [ role_config.full_name, version || config.version ].compact.join("-")
+      [ role.container_prefix, version || config.version ].compact.join("-")
+    end
+
+    def latest_image_id
+      docker :image, :ls, *argumentize("--filter", "reference=#{config.latest_image}"), "--format", "'{{.ID}}'"
+    end
+
+    def current_running_container(format:)
+      pipe \
+        shell(chain(latest_image_container(format: format), latest_container(format: format))),
+        [ :head, "-1" ]
+    end
+
+    def latest_image_container(format:)
+      latest_container format: format, filters: [ "ancestor=$(#{latest_image_id.join(" ")})" ]
+    end
+
+    def latest_container(format:, filters: nil)
+      docker :ps, "--latest", *format, *filter_args(statuses: ACTIVE_DOCKER_STATUSES), argumentize("--filter", filters)
     end
 
     def filter_args(statuses: nil)
       argumentize "--filter", filters(statuses: statuses)
     end
 
-    def service_role_dest
+    def extract_version_from_name
-      [config.service, role, config.destination].compact.join("-")
+      # Extract SHA from "service-role-dest-SHA"
+      %(while read line; do echo ${line##{role.container_prefix}-}; done)
     end
 
     def filters(statuses: nil)

lib/kamal/commands/app/assets.rb

@@ -0,0 +1,51 @@
+module Kamal::Commands::App::Assets
+  def extract_assets
+    asset_container = "#{role.container_prefix}-assets"
+
+    combine \
+      make_directory(role.asset_extracted_path),
+      [ *docker(:stop, "-t 1", asset_container, "2> /dev/null"), "|| true" ],
+      docker(:run, "--name", asset_container, "--detach", "--rm", config.absolute_image, "sleep 1000000"),
+      docker(:cp, "-L", "#{asset_container}:#{role.asset_path}/.", role.asset_extracted_path),
+      docker(:stop, "-t 1", asset_container),
+      by: "&&"
+  end
+
+  def sync_asset_volumes(old_version: nil)
+    new_extracted_path, new_volume_path = role.asset_extracted_path(config.version), role.asset_volume.host_path
+    if old_version.present?
+      old_extracted_path, old_volume_path = role.asset_extracted_path(old_version), role.asset_volume(old_version).host_path
+    end
+
+    commands = [ make_directory(new_volume_path), copy_contents(new_extracted_path, new_volume_path) ]
+
+    if old_version.present?
+      commands << copy_contents(new_extracted_path, old_volume_path, continue_on_error: true)
+      commands << copy_contents(old_extracted_path, new_volume_path, continue_on_error: true)
+    end
+
+    chain *commands
+  end
+
+  def clean_up_assets
+    chain \
+      find_and_remove_older_siblings(role.asset_extracted_path),
+      find_and_remove_older_siblings(role.asset_volume_path)
+  end
+
+  private
+    def find_and_remove_older_siblings(path)
+      [
+        :find,
+        Pathname.new(path).dirname.to_s,
+        "-maxdepth 1",
+        "-name", "'#{role.container_prefix}-*'",
+        "!", "-name", Pathname.new(path).basename.to_s,
+        "-exec rm -rf \"{}\" +"
+      ]
+    end
+
+    def copy_contents(source, destination, continue_on_error: false)
+      [ :cp, "-rnT", "#{source}", destination, *("|| true" if continue_on_error) ]
+    end
+end

lib/kamal/commands/app/containers.rb

@@ -0,0 +1,32 @@
+module Kamal::Commands::App::Containers
+  DOCKER_HEALTH_LOG_FORMAT    = "'{{json .State.Health}}'"
+
+  def list_containers
+    docker :container, :ls, "--all", *filter_args
+  end
+
+  def list_container_names
+    [ *list_containers, "--format", "'{{ .Names }}'" ]
+  end
+
+  def remove_container(version:)
+    pipe \
+      container_id_for(container_name: container_name(version)),
+      xargs(docker(:container, :rm))
+  end
+
+  def rename_container(version:, new_version:)
+    docker :rename, container_name(version), container_name(new_version)
+  end
+
+  def remove_containers
+    docker :container, :prune, "--force", *filter_args
+  end
+
+  def container_endpoint(version:)
+    pipe \
+      container_id_for(container_name: container_name(version)),
+      xargs(docker(:inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'")),
+      [ :sed, "-e", "'s/\\/tcp$//'" ]
+  end
+end

lib/kamal/commands/app/execution.rb

@@ -0,0 +1,29 @@
+module Kamal::Commands::App::Execution
+  def execute_in_existing_container(*command, interactive: false, env:)
+    docker :exec,
+      ("-it" if interactive),
+      *argumentize("--env", env),
+      container_name,
+      *command
+  end
+
+  def execute_in_new_container(*command, interactive: false, env:)
+    docker :run,
+      ("-it" if interactive),
+      "--rm",
+      *role&.env_args(host),
+      *argumentize("--env", env),
+      *config.volume_args,
+      *role&.option_args,
+      config.absolute_image,
+      *command
+  end
+
+  def execute_in_existing_container_over_ssh(*command,  env:)
+    run_over_ssh execute_in_existing_container(*command, interactive: true, env: env), host: host
+  end
+
+  def execute_in_new_container_over_ssh(*command, env:)
+    run_over_ssh execute_in_new_container(*command, interactive: true, env: env), host: host
+  end
+end

lib/kamal/commands/app/images.rb

@@ -0,0 +1,13 @@
+module Kamal::Commands::App::Images
+  def list_images
+    docker :image, :ls, config.repository
+  end
+
+  def remove_images
+    docker :image, :prune, "--all", "--force", *filter_args
+  end
+
+  def tag_latest_image
+    docker :tag, config.absolute_image, config.latest_image
+  end
+end

lib/kamal/commands/app/logging.rb

@@ -0,0 +1,18 @@
+module Kamal::Commands::App::Logging
+  def logs(version: nil, since: nil, lines: nil, grep: nil)
+    pipe \
+      version ? container_id_for_version(version) : current_running_container_id,
+      "xargs docker logs#{" --since #{since}" if since}#{" --tail #{lines}" if lines} 2>&1",
+      ("grep '#{grep}'" if grep)
+  end
+
+  def follow_logs(host:, lines: nil, grep: nil)
+    run_over_ssh \
+      pipe(
+        current_running_container_id,
+        "xargs docker logs --timestamps#{" --tail #{lines}" if lines} --follow 2>&1",
+        (%(grep "#{grep}") if grep)
+      ),
+      host: host
+  end
+end

lib/kamal/commands/auditor.rb

@@ -21,7 +21,7 @@ class Kamal::Commands::Auditor < Kamal::Commands::Base
     def audit_log_file
       file = [ config.service, config.destination, "audit.log" ].compact.join("-")
 
-      "#{config.run_directory}/#{file}"
+      File.join(config.run_directory, file)
     end
 
     def audit_tags(**details)

lib/kamal/commands/base.rb

@@ -3,7 +3,6 @@ module Kamal::Commands
     delegate :sensitive, :argumentize, to: Kamal::Utils
 
     DOCKER_HEALTH_STATUS_FORMAT = "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'"
-    DOCKER_HEALTH_LOG_FORMAT    = "'{{json .State.Health}}'"
 
     attr_accessor :config
 
@@ -18,7 +17,7 @@ module Kamal::Commands
         elsif config.ssh.proxy && config.ssh.proxy.is_a?(Net::SSH::Proxy::Command)
           cmd << " -o ProxyCommand='#{config.ssh.proxy.command_line_template}'"
         end
-        cmd << " -t #{config.ssh.user}@#{host} '#{command.join(" ")}'"
+        cmd << " -t #{config.ssh.user}@#{host} -p #{config.ssh.port} '#{command.join(" ").gsub("'", "'\\\\''")}'"
       end
     end
 
@@ -62,22 +61,28 @@ module Kamal::Commands
         combine *commands, by: ">"
       end
 
+      def any(*commands)
+        combine *commands, by: "||"
+      end
+
       def xargs(command)
         [ :xargs, command ].flatten
       end
 
+      def shell(command)
+        [ :sh, "-c", "'#{command.flatten.join(" ").gsub("'", "'\\\\''")}'" ]
+      end
+
       def docker(*args)
         args.compact.unshift :docker
       end
 
+      def git(*args, path: nil)
+        [ :git, *([ "-C", path ] if path), *args.compact ]
+      end
+
       def tags(**details)
         Kamal::Tags.from_config(config, **details)
       end
-
-      def create_empty_file(file)
-        chain \
-          make_directory_for(file),
-          [:touch, file]
-      end
   end
 end

lib/kamal/commands/builder.rb

@@ -1,7 +1,9 @@
 require "active_support/core_ext/string/filters"
 
 class Kamal::Commands::Builder < Kamal::Commands::Base
-  delegate :create, :remove, :push, :clean, :pull, :info, to: :target
+  delegate :create, :remove, :push, :clean, :pull, :info, :validate_image, to: :target
+
+  include Clone
 
   def name
     target.class.to_s.remove("Kamal::Commands::Builder::").underscore.inquiry

lib/kamal/commands/builder/base.rb

@@ -3,7 +3,7 @@ class Kamal::Commands::Builder::Base < Kamal::Commands::Base
   class BuilderError < StandardError; end
 
   delegate :argumentize, to: Kamal::Utils
-  delegate :args, :secrets, :dockerfile, :local_arch, :local_host, :remote_arch, :remote_host, :cache_from, :cache_to, to: :builder_config
+  delegate :args, :secrets, :dockerfile, :target, :local_arch, :local_host, :remote_arch, :remote_host, :cache_from, :cache_to, :ssh, to: :builder_config
 
   def clean
     docker :image, :rm, "--force", config.absolute_image
@@ -14,13 +14,22 @@ class Kamal::Commands::Builder::Base < Kamal::Commands::Base
   end
 
   def build_options
-    [ *build_tags, *build_cache, *build_labels, *build_args, *build_secrets, *build_dockerfile ]
+    [ *build_tags, *build_cache, *build_labels, *build_args, *build_secrets, *build_dockerfile, *build_target, *build_ssh ]
   end
 
   def build_context
     config.builder.context
   end
 
+  def validate_image
+    pipe \
+      docker(:inspect, "-f", "'{{ .Config.Labels.service }}'", config.absolute_image),
+      any(
+        [ :grep, "-x", config.service ],
+        "(echo \"Image #{config.absolute_image} is missing the 'service' label\" && exit 1)"
+      )
+  end
+
 
   private
     def build_tags
@@ -29,8 +38,8 @@ class Kamal::Commands::Builder::Base < Kamal::Commands::Base
 
     def build_cache
       if cache_to && cache_from
-        ["--cache-to", cache_to,
+        [ "--cache-to", cache_to,
-          "--cache-from", cache_from]
+          "--cache-from", cache_from ]
       end
     end
 
@@ -54,6 +63,14 @@ class Kamal::Commands::Builder::Base < Kamal::Commands::Base
       end
     end
 
+    def build_target
+      argumentize "--target", target if target.present?
+    end
+
+    def build_ssh
+      argumentize "--ssh", ssh if ssh.present?
+    end
+
     def builder_config
       config.builder
     end

lib/kamal/commands/builder/clone.rb

@@ -0,0 +1,28 @@
+module Kamal::Commands::Builder::Clone
+  extend ActiveSupport::Concern
+
+  included do
+    delegate :clone_directory, :build_directory, to: :"config.builder"
+  end
+
+  def clone
+    git :clone, Kamal::Git.root, path: clone_directory
+  end
+
+  def clone_reset_steps
+    [
+      git(:remote, "set-url", :origin, Kamal::Git.root, path: build_directory),
+      git(:fetch, :origin, path: build_directory),
+      git(:reset, "--hard", Kamal::Git.revision, path: build_directory),
+      git(:clean, "-fdx", path: build_directory)
+    ]
+  end
+
+  def clone_status
+    git :status, "--porcelain", path: build_directory
+  end
+
+  def clone_revision
+    git :"rev-parse", :HEAD, path: build_directory
+  end
+end

lib/kamal/commands/builder/multiarch.rb

@@ -7,23 +7,31 @@ class Kamal::Commands::Builder::Multiarch < Kamal::Commands::Builder::Base
     docker :buildx, :rm, builder_name
   end
 
-  def push
-    docker :buildx, :build,
-      "--push",
-      "--platform", "linux/amd64,linux/arm64",
-      "--builder", builder_name,
-      *build_options,
-      build_context
-  end
-
   def info
     combine \
       docker(:context, :ls),
       docker(:buildx, :ls)
   end
 
+  def push
+    docker :buildx, :build,
+      "--push",
+      "--platform", platform_names,
+      "--builder", builder_name,
+      *build_options,
+      build_context
+  end
+
   private
     def builder_name
       "kamal-#{config.service}-multiarch"
     end
+
+    def platform_names
+      if local_arch
+        "linux/#{local_arch}"
+      else
+        "linux/amd64,linux/arm64"
+      end
+    end
 end

lib/kamal/commands/builder/native.rb

@@ -7,14 +7,14 @@ class Kamal::Commands::Builder::Native < Kamal::Commands::Builder::Base
     # No-op on native without cache
   end
 
+  def info
+    # No-op on native
+  end
+
   def push
     combine \
       docker(:build, *build_options, build_context),
       docker(:push, config.absolute_image),
       docker(:push, config.latest_image)
   end
-
-  def info
-    # No-op on native
-  end
 end

lib/kamal/commands/builder/native/remote.rb

@@ -11,21 +11,21 @@ class Kamal::Commands::Builder::Native::Remote < Kamal::Commands::Builder::Nativ
       remove_buildx
   end
 
-  def push
-    docker :buildx, :build,
-      "--push",
-      "--platform", platform,
-      "--builder", builder_name,
-      *build_options,
-      build_context
-  end
-
   def info
     chain \
       docker(:context, :ls),
       docker(:buildx, :ls)
   end
 
+  def push
+    docker :buildx, :build,
+    "--push",
+    "--platform", platform,
+    "--builder", builder_name,
+    *build_options,
+    build_context
+  end
+
 
   private
     def builder_name

lib/kamal/commands/docker.rb

@@ -1,7 +1,7 @@
 class Kamal::Commands::Docker < Kamal::Commands::Base
   # Install Docker using the https://github.com/docker/docker-install convenience script.
   def install
-    pipe [ :curl, "-fsSL", "https://get.docker.com" ], :sh
+    pipe get_docker, :sh
   end
 
   # Checks the Docker client version. Fails if Docker is not installed.
@@ -16,6 +16,15 @@ class Kamal::Commands::Docker < Kamal::Commands::Base
 
   # Do we have superuser access to install Docker and start system services?
   def superuser?
-    [ '[ "${EUID:-$(id -u)}" -eq 0 ]' ]
+    [ '[ "${EUID:-$(id -u)}" -eq 0 ] || command -v sudo >/dev/null || command -v su >/dev/null' ]
   end
+
+  private
+    def get_docker
+      shell \
+        any \
+          [ :curl, "-fsSL", "https://get.docker.com" ],
+          [ :wget, "-O -", "https://get.docker.com" ],
+          [ :echo, "\"exit 1\"" ]
+    end
 end

lib/kamal/commands/healthcheck.rb

@@ -1,60 +0,0 @@
-class Kamal::Commands::Healthcheck < Kamal::Commands::Base
-
-  def run
-    web = config.role(:web)
-
-    docker :run,
-      "--detach",
-      "--name", container_name_with_version,
-      "--publish", "#{exposed_port}:#{config.healthcheck["port"]}",
-      "--label", "service=#{container_name}",
-      "-e", "KAMAL_CONTAINER_NAME=\"#{container_name}\"",
-      *web.env_args,
-      *web.health_check_args(cord: false),
-      *config.volume_args,
-      *web.option_args,
-      config.absolute_image,
-      web.cmd
-  end
-
-  def status
-    pipe container_id, xargs(docker(:inspect, "--format", DOCKER_HEALTH_STATUS_FORMAT))
-  end
-
-  def container_health_log
-    pipe container_id, xargs(docker(:inspect, "--format", DOCKER_HEALTH_LOG_FORMAT))
-  end
-
-  def logs
-    pipe container_id, xargs(docker(:logs, "--tail", 50, "2>&1"))
-  end
-
-  def stop
-    pipe container_id, xargs(docker(:stop))
-  end
-
-  def remove
-    pipe container_id, xargs(docker(:container, :rm))
-  end
-
-  private
-    def container_name
-      [ "healthcheck", config.service, config.destination ].compact.join("-")
-    end
-
-    def container_name_with_version
-      "#{container_name}-#{config.version}"
-    end
-
-    def container_id
-      container_id_for(container_name: container_name_with_version)
-    end
-
-    def health_url
-      "http://localhost:#{exposed_port}#{config.healthcheck["path"]}"
-    end
-
-    def exposed_port
-      config.healthcheck["exposed_port"]
-    end
-end

lib/kamal/commands/hook.rb

@@ -9,6 +9,6 @@ class Kamal::Commands::Hook < Kamal::Commands::Base
 
   private
     def hook_file(hook)
-      "#{config.hooks_path}/#{hook}"
+      File.join(config.hooks_path, hook)
     end
 end

lib/kamal/commands/lock.rb

@@ -1,17 +1,18 @@
 require "active_support/duration"
 require "time"
+require "base64"
 
 class Kamal::Commands::Lock < Kamal::Commands::Base
   def acquire(message, version)
     combine \
-      [:mkdir, lock_dir],
+      [ :mkdir, lock_dir ],
       write_lock_details(message, version)
   end
 
   def release
     combine \
-      [:rm, lock_details_file],
+      [ :rm, lock_details_file ],
-      [:rm, "-r", lock_dir]
+      [ :rm, "-r", lock_dir ]
   end
 
   def status
@@ -20,31 +21,41 @@ class Kamal::Commands::Lock < Kamal::Commands::Base
       read_lock_details
   end
 
+  def ensure_locks_directory
+    [ :mkdir, "-p", locks_dir ]
+  end
+
   private
     def write_lock_details(message, version)
       write \
-        [:echo, "\"#{Base64.encode64(lock_details(message, version))}\""],
+        [ :echo, "\"#{Base64.encode64(lock_details(message, version))}\"" ],
         lock_details_file
     end
 
     def read_lock_details
       pipe \
-        [:cat, lock_details_file],
+        [ :cat, lock_details_file ],
-        [:base64, "-d"]
+        [ :base64, "-d" ]
     end
 
     def stat_lock_dir
       write \
-        [:stat, lock_dir],
+        [ :stat, lock_dir ],
         "/dev/null"
     end
 
+    def locks_dir
+      File.join(config.run_directory, "locks")
+    end
+
     def lock_dir
-      "#{config.run_directory}/lock-#{config.service}"
+      dir_name = [ config.service, config.destination ].compact.join("-")
+
+      File.join(locks_dir, dir_name)
     end
 
     def lock_details_file
-      [lock_dir, :details].join("/")
+      File.join(lock_dir, "details")
     end
 
     def lock_details(message, version)
@@ -56,7 +67,7 @@ class Kamal::Commands::Lock < Kamal::Commands::Base
     end
 
     def locked_by
-      `git config user.name`.strip
+      Kamal::Git.user_name
     rescue Errno::ENOENT
       "Unknown"
     end

lib/kamal/commands/proxy.rb

@@ -0,0 +1,79 @@
+class Kamal::Commands::Proxy < Kamal::Commands::Base
+  delegate :argumentize, :optionize, to: Kamal::Utils
+  delegate :container_name, to: :proxy_config
+
+  attr_reader :proxy_config
+
+  def initialize(config)
+    super
+    @proxy_config = config.proxy
+  end
+
+  def run
+    docker :run,
+      "--name", container_name,
+      "--detach",
+      "--restart", "unless-stopped",
+      *proxy_config.publish_args,
+      "--volume", "/var/run/docker.sock:/var/run/docker.sock",
+      "--volume", "#{container_name}:/root/.config/kamal-proxy",
+      *config.logging_args,
+      *proxy_config.docker_options_args,
+      proxy_config.image
+  end
+
+  def start
+    docker :container, :start, container_name
+  end
+
+  def stop(name: container_name)
+    docker :container, :stop, name
+  end
+
+  def start_or_run
+    combine start, run, by: "||"
+  end
+
+  def deploy(service, target:)
+    optionize({ target: target })
+    docker :exec, container_name, "kamal-proxy", :deploy, service, *optionize({ target: target }), *proxy_config.deploy_command_args
+  end
+
+  def remove(service, target:)
+    docker :exec, container_name, "kamal-proxy", :remove, service, *optionize({ target: target })
+  end
+
+  def info
+    docker :ps, "--filter", "name=^#{container_name}$"
+  end
+
+  def logs(since: nil, lines: nil, grep: nil)
+    pipe \
+      docker(:logs, container_name, (" --since #{since}" if since), (" --tail #{lines}" if lines), "--timestamps", "2>&1"),
+      ("grep '#{grep}'" if grep)
+  end
+
+  def follow_logs(host:, grep: nil)
+    run_over_ssh pipe(
+      docker(:logs, container_name, "--timestamps", "--tail", "10", "--follow", "2>&1"),
+      (%(grep "#{grep}") if grep)
+    ).join(" "), host: host
+  end
+
+  def remove_container(filter: container_filter)
+    docker :container, :prune, "--force", "--filter", filter
+  end
+
+  def remove_image(filter: image_filter)
+    docker :image, :prune, "--all", "--force", "--filter", filter
+  end
+
+  private
+    def container_filter
+      "label=org.opencontainers.image.title=kamal-proxy"
+    end
+
+    def image_filter
+      "label=org.opencontainers.image.title=kamal-proxy"
+    end
+end

lib/kamal/commands/prune.rb

@@ -3,7 +3,7 @@ require "active_support/core_ext/numeric/time"
 
 class Kamal::Commands::Prune < Kamal::Commands::Base
   def dangling_images
-    docker :image, :prune, "--force", "--filter", "label=service=#{config.service}", "--filter", "dangling=true"
+    docker :image, :prune, "--force", "--filter", "label=service=#{config.service}"
   end
 
   def tagged_images
@@ -13,16 +13,16 @@ class Kamal::Commands::Prune < Kamal::Commands::Base
       "while read image tag; do docker rmi $tag; done"
   end
 
-  def containers(keep_last: 5)
+  def app_containers(retain:)
     pipe \
       docker(:ps, "-q", "-a", *service_filter, *stopped_containers_filters),
-      "tail -n +#{keep_last + 1}",
+      "tail -n +#{retain + 1}",
       "while read container_id; do docker rm $container_id; done"
   end
 
   private
     def stopped_containers_filters
-      [ "created", "exited", "dead" ].flat_map { |status| ["--filter", "status=#{status}"] }
+      [ "created", "exited", "dead" ].flat_map { |status| [ "--filter", "status=#{status}" ] }
     end
 
     def active_image_list

lib/kamal/commands/registry.rb

@@ -2,7 +2,10 @@ class Kamal::Commands::Registry < Kamal::Commands::Base
   delegate :registry, to: :config
 
   def login
-    docker :login, registry["server"], "-u", sensitive(lookup("username")), "-p", sensitive(lookup("password"))
+    docker :login,
+      registry["server"],
+      "-u", sensitive(Kamal::Utils.escape_shell_value(lookup("username"))),
+      "-p", sensitive(Kamal::Utils.escape_shell_value(lookup("password")))
   end
 
   def logout

lib/kamal/commands/server.rb

@@ -1,5 +1,5 @@
 class Kamal::Commands::Server < Kamal::Commands::Base
   def ensure_run_directory
-    [:mkdir, "-p", config.run_directory]
+    [ :mkdir, "-p", config.run_directory ]
   end
 end

lib/kamal/commands/traefik.rb

@@ -1,122 +0,0 @@
-class Kamal::Commands::Traefik < Kamal::Commands::Base
-  delegate :argumentize, :env_file_with_secrets, :optionize, to: Kamal::Utils
-
-  DEFAULT_IMAGE = "traefik:v2.9"
-  CONTAINER_PORT = 80
-  DEFAULT_ARGS = {
-    'log.level' => 'DEBUG'
-  }
-
-  def run
-    docker :run, "--name traefik",
-      "--detach",
-      "--restart", "unless-stopped",
-      *publish_args,
-      "--volume", "/var/run/docker.sock:/var/run/docker.sock",
-      *env_args,
-      *config.logging_args,
-      *label_args,
-      *docker_options_args,
-      image,
-      "--providers.docker",
-      *cmd_option_args
-  end
-
-  def start
-    docker :container, :start, "traefik"
-  end
-
-  def stop
-    docker :container, :stop, "traefik"
-  end
-
-  def start_or_run
-    combine start, run, by: "||"
-  end
-
-  def info
-    docker :ps, "--filter", "name=^traefik$"
-  end
-
-  def logs(since: nil, lines: nil, grep: nil)
-    pipe \
-      docker(:logs, "traefik", (" --since #{since}" if since), (" --tail #{lines}" if lines), "--timestamps", "2>&1"),
-      ("grep '#{grep}'" if grep)
-  end
-
-  def follow_logs(host:, grep: nil)
-    run_over_ssh pipe(
-      docker(:logs, "traefik", "--timestamps", "--tail", "10", "--follow", "2>&1"),
-      (%(grep "#{grep}") if grep)
-    ).join(" "), host: host
-  end
-
-  def remove_container
-    docker :container, :prune, "--force", "--filter", "label=org.opencontainers.image.title=Traefik"
-  end
-
-  def remove_image
-    docker :image, :prune, "--all", "--force", "--filter", "label=org.opencontainers.image.title=Traefik"
-  end
-
-  def port
-    "#{host_port}:#{CONTAINER_PORT}"
-  end
-
-  def env_file
-    env_file_with_secrets config.traefik.fetch("env", {})
-  end
-
-  def host_env_file_path
-    File.join host_env_directory, "traefik.env"
-  end
-
-  def make_env_directory
-    make_directory(host_env_directory)
-  end
-
-  def remove_env_file
-    [:rm, "-f", host_env_file_path]
-  end
-
-  private
-    def publish_args
-      argumentize "--publish", port unless config.traefik["publish"] == false
-    end
-
-    def label_args
-      argumentize "--label", labels
-    end
-
-    def env_args
-      argumentize "--env-file", host_env_file_path
-    end
-
-    def host_env_directory
-      File.join config.host_env_directory, "traefik"
-    end
-
-    def labels
-      config.traefik["labels"] || []
-    end
-
-    def image
-      config.traefik.fetch("image") { DEFAULT_IMAGE }
-    end
-
-    def docker_options_args
-      optionize(config.traefik["options"] || {})
-    end
-
-    def cmd_option_args
-      if args = config.traefik["args"]
-        optionize DEFAULT_ARGS.merge(args), with: "="
-      else
-        optionize DEFAULT_ARGS, with: "="
-      end
-    end
-
-    def host_port
-      config.traefik["host_port"] || CONTAINER_PORT
-    end
-end

lib/kamal/configuration.rb

@@ -6,11 +6,10 @@ require "erb"
 require "net/ssh/proxy/jump"
 
 class Kamal::Configuration
-  delegate :service, :image, :servers, :env, :labels, :registry, :stop_wait_time, :hooks_path, to: :raw_config, allow_nil: true
+  delegate :service, :image, :port, :servers, :labels, :registry, :stop_wait_time, :hooks_path, :logging, to: :raw_config, allow_nil: true
   delegate :argumentize, :optionize, to: Kamal::Utils
 
-  attr_accessor :destination
+  attr_reader :destination, :raw_config
-  attr_accessor :raw_config
 
   class << self
     def create_from(config_file:, destination: nil, version: nil)
@@ -26,7 +25,9 @@ class Kamal::Configuration
 
       def load_config_file(file)
         if file.exist?
-          YAML.load(ERB.new(IO.read(file)).result).symbolize_keys
+          # Newer Psych doesn't load aliases by default
+          load_method = YAML.respond_to?(:unsafe_load) ? :unsafe_load : :load
+          YAML.send(load_method, ERB.new(IO.read(file)).result).symbolize_keys
         else
           raise "Configuration file not found in #{file}"
         end
@@ -54,21 +55,20 @@ class Kamal::Configuration
   end
 
   def abbreviated_version
-    Kamal::Utils.abbreviate_version(version)
+    if version
-  end
+      # Don't abbreviate <sha>_uncommitted_<etc>
-
+      if version.include?("_")
-  def run_directory
+        version
-    raw_config.run_directory || ".kamal"
+      else
-  end
+        version[0...7]
-
+      end
-  def run_directory_as_docker_volume
-    if Pathname.new(run_directory).absolute?
-      run_directory
-    else
-      File.join "$(pwd)", run_directory
     end
   end
 
+  def minimum_version
+    raw_config.minimum_version
+  end
+
 
   def roles
     @roles ||= role_names.collect { |role_name| Role.new(role_name, config: self) }
@@ -88,21 +88,36 @@ class Kamal::Configuration
 
 
   def all_hosts
-    roles.flat_map(&:hosts).uniq
+    (roles + accessories).flat_map(&:hosts).uniq
   end
 
-  def primary_web_host
+  def primary_host
-    role(:web).primary_host
+    primary_role&.primary_host
   end
 
-  def traefik_hosts
+  def primary_role_name
-    roles.select(&:running_traefik?).flat_map(&:hosts).uniq
+    raw_config.primary_role || "web"
   end
 
-  def boot
+  def primary_role
-    Kamal::Configuration::Boot.new(config: self)
+    role(primary_role_name)
   end
 
+  def allow_empty_roles?
+    raw_config.allow_empty_roles
+  end
+
+  def proxy_roles
+    roles.select(&:running_proxy?)
+  end
+
+  def proxy_role_names
+    proxy_roles.flat_map(&:name)
+  end
+
+  def proxy_hosts
+    proxy_roles.flat_map(&:hosts).uniq
+  end
 
   def repository
     [ raw_config.registry["server"], image ].compact.join("/")
@@ -113,13 +128,25 @@ class Kamal::Configuration
   end
 
   def latest_image
-    "#{repository}:latest"
+    "#{repository}:#{latest_tag}"
+  end
+
+  def latest_tag
+    [ "latest", *destination ].join("-")
   end
 
   def service_with_version
     "#{service}-#{version}"
   end
 
+  def require_destination?
+    raw_config.require_destination
+  end
+
+  def retain_containers
+    raw_config.retain_containers || 5
+  end
+
 
   def volume_args
     if raw_config.volumes.present?
@@ -130,15 +157,27 @@ class Kamal::Configuration
   end
 
   def logging_args
-    if raw_config.logging.present?
+    if logging.present?
-      optionize({ "log-driver" => raw_config.logging["driver"] }.compact) +
+      optionize({ "log-driver" => logging["driver"] }.compact) +
-        argumentize("--log-opt", raw_config.logging["options"])
+        argumentize("--log-opt", logging["options"])
     else
       argumentize("--log-opt", { "max-size" => "10m" })
     end
   end
 
 
+  def boot
+    Kamal::Configuration::Boot.new(config: self)
+  end
+
+  def builder
+    Kamal::Configuration::Builder.new(config: self)
+  end
+
+  def proxy
+    Kamal::Configuration::Proxy.new(config: self)
+  end
+
   def ssh
     Kamal::Configuration::Ssh.new(config: self)
   end
@@ -148,28 +187,66 @@ class Kamal::Configuration
   end
 
 
-  def healthcheck
-    { "path" => "/up", "port" => 3000, "max_attempts" => 7, "exposed_port" => 3999, "cord" => "/tmp/kamal-cord" }.merge(raw_config.healthcheck || {})
-  end
-
   def readiness_delay
     raw_config.readiness_delay || 7
   end
 
-  def minimum_version
+  def run_id
-    raw_config.minimum_version
+    @run_id ||= SecureRandom.hex(16)
   end
 
+
+  def run_directory
+    raw_config.run_directory || ".kamal"
+  end
+
+  def run_directory_as_docker_volume
+    if Pathname.new(run_directory).absolute?
+      run_directory
+    else
+      File.join "$(pwd)", run_directory
+    end
+  end
+
+  def hooks_path
+    raw_config.hooks_path || ".kamal/hooks"
+  end
+
+  def asset_path
+    raw_config.asset_path
+  end
+
+
+  def host_env_directory
+    File.join(run_directory, "env")
+  end
+
+  def env
+    raw_config.env || {}
+  end
+
+  def env_tags
+    @env_tags ||= if (tags = raw_config.env["tags"])
+      tags.collect { |name, config| Kamal::Configuration::Env::Tag.new(name, config: config) }
+    else
+      []
+    end
+  end
+
+  def env_tag(name)
+    env_tags.detect { |t| t.name == name.to_s }
+  end
+
+
   def valid?
-    ensure_required_keys_present && ensure_valid_kamal_version
+    ensure_destination_if_required && ensure_required_keys_present && ensure_valid_kamal_version && ensure_retain_containers_valid && ensure_valid_service_name
   end
 
-
   def to_h
     {
       roles: role_names,
       hosts: all_hosts,
-      primary_host: primary_web_host,
+      primary_host: primary_host,
       version: version,
       repository: repository,
       absolute_image: absolute_image,
@@ -179,40 +256,21 @@ class Kamal::Configuration
       sshkit: sshkit.to_h,
       builder: builder.to_h,
       accessories: raw_config.accessories,
-      logging: logging_args,
+      logging: logging_args
-      healthcheck: healthcheck
     }.compact
   end
 
-  def traefik
-    raw_config.traefik || {}
-  end
-
-  def hooks_path
-    raw_config.hooks_path || ".kamal/hooks"
-  end
-
-  def builder
-    Kamal::Configuration::Builder.new(config: self)
-  end
-
-  # Will raise KeyError if any secret ENVs are missing
-  def ensure_env_available
-    roles.each(&:env_file)
-
-    true
-  end
-
-  def host_env_directory
-    "#{run_directory}/env"
-  end
-
-  def run_id
-    @run_id ||= SecureRandom.hex(16)
-  end
 
   private
     # Will raise ArgumentError if any required config keys are missing
+    def ensure_destination_if_required
+      if require_destination? && destination.nil?
+        raise ArgumentError, "You must specify a destination"
+      end
+
+      true
+    end
+
     def ensure_required_keys_present
       %i[ service image registry servers ].each do |key|
         raise ArgumentError, "Missing required configuration for #{key}" unless raw_config[key].present?
@@ -226,15 +284,31 @@ class Kamal::Configuration
         raise ArgumentError, "You must specify a password for the registry in config/deploy.yml (or set the ENV variable if that's used)"
       end
 
-      roles.each do |role|
+      unless role_names.include?(primary_role_name)
-        if role.hosts.empty?
+        raise ArgumentError, "The primary_role #{primary_role_name} isn't defined"
-          raise ArgumentError, "No servers specified for the #{role.name} role"
+      end
+
+      if primary_role.hosts.empty?
+        raise ArgumentError, "No servers specified for the #{primary_role.name} primary_role"
+      end
+
+      unless allow_empty_roles?
+        roles.each do |role|
+          if role.hosts.empty?
+            raise ArgumentError, "No servers specified for the #{role.name} role. You can ignore this with allow_empty_roles: true"
+          end
         end
       end
 
       true
     end
 
+    def ensure_valid_service_name
+      raise ArgumentError, "Service name can only include alphanumeric characters, hyphens, and underscores" unless raw_config[:service] =~ /^[a-z0-9_-]+$/i
+
+      true
+    end
+
     def ensure_valid_kamal_version
       if minimum_version && Gem::Version.new(minimum_version) > Gem::Version.new(Kamal::VERSION)
         raise ArgumentError, "Current version is #{Kamal::VERSION}, minimum required is #{minimum_version}"
@@ -243,6 +317,12 @@ class Kamal::Configuration
       true
     end
 
+    def ensure_retain_containers_valid
+      raise ArgumentError, "Must retain at least 1 container" if retain_containers < 1
+
+      true
+    end
+
 
     def role_names
       raw_config.servers.is_a?(Array) ? [ "web" ] : raw_config.servers.keys.sort
@@ -250,10 +330,11 @@ class Kamal::Configuration
 
     def git_version
       @git_version ||=
-        if system("git rev-parse")
+        if Kamal::Git.used?
-          uncommitted_suffix = Kamal::Utils.uncommitted_changes.present? ? "_uncommitted_#{SecureRandom.hex(8)}" : ""
+          if Kamal::Git.uncommitted_changes.present? && !builder.git_clone?
-
+            uncommitted_suffix = "_uncommitted_#{SecureRandom.hex(8)}"
-          "#{`git rev-parse HEAD`.strip}#{uncommitted_suffix}"
+          end
+          [ Kamal::Git.revision, uncommitted_suffix ].compact.join
         else
           raise "Can't use commit hash as version, no git repository found in #{Dir.pwd}"
         end

lib/kamal/configuration/accessory.rb

@@ -1,5 +1,5 @@
 class Kamal::Configuration::Accessory
-  delegate :argumentize, :env_file_with_secrets, :optionize, to: Kamal::Utils
+  delegate :argumentize, :optionize, to: Kamal::Utils
 
   attr_accessor :name, :specifics
 
@@ -8,7 +8,7 @@ class Kamal::Configuration::Accessory
   end
 
   def service_name
-    "#{config.service}-#{name}"
+    specifics["service"] || "#{config.service}-#{name}"
   end
 
   def image
@@ -16,7 +16,7 @@ class Kamal::Configuration::Accessory
   end
 
   def hosts
-    if (specifics.keys & ["host", "hosts", "roles"]).size != 1
+    if (specifics.keys & [ "host", "hosts", "roles" ]).size != 1
       raise ArgumentError, "Specify one of `host`, `hosts` or `roles` for accessory `#{name}`"
     end
 
@@ -42,23 +42,13 @@ class Kamal::Configuration::Accessory
   end
 
   def env
-    specifics["env"] || {}
+    Kamal::Configuration::Env.from_config \
-  end
+      config: specifics.fetch("env", {}),
-
+      secrets_file: File.join(config.host_env_directory, "accessories", "#{service_name}.env")
-  def env_file
-    env_file_with_secrets env
-  end
-
-  def host_env_directory
-    File.join config.host_env_directory, "accessories"
-  end
-
-  def host_env_file_path
-    File.join host_env_directory, "#{service_name}.env"
   end
 
   def env_args
-    argumentize "--env-file", host_env_file_path
+    env.args
   end
 
   def files
@@ -70,8 +60,8 @@ class Kamal::Configuration::Accessory
 
   def directories
     specifics["directories"]&.to_h do |host_to_container_mapping|
-      host_relative_path, container_path = host_to_container_mapping.split(":")
+      host_path, container_path = host_to_container_mapping.split(":")
-      [ expand_host_path(host_relative_path), container_path ]
+      [ expand_host_path(host_path), container_path ]
     end || {}
   end
 
@@ -111,10 +101,10 @@ class Kamal::Configuration::Accessory
     end
 
     def with_clear_env_loaded
-      (env["clear"] || env).each { |k, v| ENV[k] = v }
+      env.clear.each { |k, v| ENV[k] = v }
       yield
     ensure
-      (env["clear"] || env).each { |k, v| ENV.delete(k) }
+      env.clear.each { |k, v| ENV.delete(k) }
     end
 
     def read_dynamic_file(local_file)
@@ -138,13 +128,17 @@ class Kamal::Configuration::Accessory
 
     def remote_directories_as_volumes
       specifics["directories"]&.collect do |host_to_container_mapping|
-        host_relative_path, container_path = host_to_container_mapping.split(":")
+        host_path, container_path = host_to_container_mapping.split(":")
-        [ expand_host_path(host_relative_path), container_path ].join(":")
+        [ expand_host_path(host_path), container_path ].join(":")
       end || []
     end
 
-    def expand_host_path(host_relative_path)
+    def expand_host_path(host_path)
-      "#{service_data_directory}/#{host_relative_path}"
+      absolute_path?(host_path) ? host_path : File.join(service_data_directory, host_path)
+    end
+
+    def absolute_path?(path)
+      Pathname.new(path).absolute?
     end
 
     def service_data_directory
@@ -155,7 +149,7 @@ class Kamal::Configuration::Accessory
       if specifics.key?("host")
         host = specifics["host"]
         if host
-          [host]
+          [ host ]
         else
           raise ArgumentError, "Missing host for accessory `#{name}`"
         end

lib/kamal/configuration/boot.rb

@@ -8,7 +8,7 @@ class Kamal::Configuration::Boot
     limit = @options["limit"]
 
     if limit.to_s.end_with?("%")
-      @host_count * limit.to_i / 100
+      [ @host_count * limit.to_i / 100, 1 ].max
     else
       limit
     end

lib/kamal/configuration/builder.rb

@@ -3,6 +3,8 @@ class Kamal::Configuration::Builder
     @options = config.raw_config.builder || {}
     @image = config.image
     @server = config.registry["server"]
+    @service = config.service
+    @destination = config.destination
 
     valid?
   end
@@ -39,6 +41,10 @@ class Kamal::Configuration::Builder
     @options["dockerfile"] || "Dockerfile"
   end
 
+  def target
+    @options["target"]
+  end
+
   def context
     @options["context"] || "."
   end
@@ -81,10 +87,31 @@ class Kamal::Configuration::Builder
     end
   end
 
+  def ssh
+    @options["ssh"]
+  end
+
+  def git_clone?
+    Kamal::Git.used? && @options["context"].nil?
+  end
+
+  def clone_directory
+    @clone_directory ||= File.join Dir.tmpdir, "kamal-clones", [ @service, pwd_sha ].compact.join("-")
+  end
+
+  def build_directory
+    @build_directory ||=
+      if git_clone?
+        File.join clone_directory, repo_basename, repo_relative_pwd
+      else
+        "."
+      end
+  end
+
   private
     def valid?
       if @options["cache"] && @options["cache"]["type"]
-        raise ArgumentError, "Invalid cache type: #{@options["cache"]["type"]}" unless ["gha", "registry"].include?(@options["cache"]["type"])
+        raise ArgumentError, "Invalid cache type: #{@options["cache"]["type"]}" unless [ "gha", "registry" ].include?(@options["cache"]["type"])
       end
     end
 
@@ -105,10 +132,22 @@ class Kamal::Configuration::Builder
     end
 
     def cache_to_config_for_gha
-      [ "type=gha", @options["cache"]&.fetch("options", nil)].compact.join(",")
+      [ "type=gha", @options["cache"]&.fetch("options", nil) ].compact.join(",")
     end
 
     def cache_to_config_for_registry
       [ "type=registry", @options["cache"]&.fetch("options", nil), "ref=#{cache_image_ref}" ].compact.join(",")
     end
+
+    def repo_basename
+      File.basename(Kamal::Git.root)
+    end
+
+    def repo_relative_pwd
+      Dir.pwd.delete_prefix(Kamal::Git.root)
+    end
+
+    def pwd_sha
+      Digest::SHA256.hexdigest(Dir.pwd)[0..12]
+    end
 end

lib/kamal/configuration/env.rb

@@ -0,0 +1,40 @@
+class Kamal::Configuration::Env
+  attr_reader :secrets_keys, :clear, :secrets_file
+  delegate :argumentize, to: Kamal::Utils
+
+  def self.from_config(config:, secrets_file: nil)
+    secrets_keys = config.fetch("secret", [])
+    clear = config.fetch("clear", config.key?("secret") || config.key?("tags") ? {} : config)
+
+    new clear: clear, secrets_keys: secrets_keys, secrets_file: secrets_file
+  end
+
+  def initialize(clear:, secrets_keys:, secrets_file:)
+    @clear = clear
+    @secrets_keys = secrets_keys
+    @secrets_file = secrets_file
+  end
+
+  def args
+    [ "--env-file", secrets_file, *argumentize("--env", clear) ]
+  end
+
+  def secrets_io
+    StringIO.new(Kamal::EnvFile.new(secrets).to_s)
+  end
+
+  def secrets
+    @secrets ||= secrets_keys.to_h { |key| [ key, ENV.fetch(key) ] }
+  end
+
+  def secrets_directory
+    File.dirname(secrets_file)
+  end
+
+  def merge(other)
+    self.class.new \
+      clear: @clear.merge(other.clear),
+      secrets_keys: @secrets_keys | other.secrets_keys,
+      secrets_file: secrets_file
+  end
+end

lib/kamal/configuration/env/tag.rb

@@ -0,0 +1,12 @@
+class Kamal::Configuration::Env::Tag
+  attr_reader :name, :config
+
+  def initialize(name, config:)
+    @name = name
+    @config = config
+  end
+
+  def env
+    Kamal::Configuration::Env.from_config(config: config)
+  end
+end

lib/kamal/configuration/proxy.rb

@@ -0,0 +1,50 @@
+class Kamal::Configuration::Proxy
+  DEFAULT_HTTP_PORT = 80
+  DEFAULT_HTTPS_PORT = 443
+  DEFAULT_IMAGE = "basecamp/kamal-proxy:latest"
+
+  delegate :argumentize, :optionize, to: Kamal::Utils
+
+  def initialize(config:)
+    @options = config.raw_config.proxy || {}
+  end
+
+  def image
+    options.fetch("image", DEFAULT_IMAGE)
+  end
+
+  def debug?
+    !!options[:debug]
+  end
+
+  def http_port
+    options.fetch(:http_port, DEFAULT_HTTP_PORT)
+  end
+
+  def https_port
+    options.fetch(:http_port, DEFAULT_HTTPS_PORT)
+  end
+
+  def container_name
+    "kamal-proxy"
+  end
+
+  def docker_options_args
+    optionize(options.fetch("options", {}))
+  end
+
+  def publish_args
+    argumentize "--publish", [ *("#{http_port}:#{DEFAULT_HTTP_PORT}" if http_port), *("#{https_port}:#{DEFAULT_HTTPS_PORT}" if https_port) ]
+  end
+
+  def deploy_options
+    options.fetch(:deploy, {})
+  end
+
+  def deploy_command_args
+    optionize deploy_options
+  end
+
+  private
+    attr_accessor :options
+end

lib/kamal/configuration/role.rb

@@ -1,11 +1,12 @@
 class Kamal::Configuration::Role
-  CORD_FILE = "cord"
+  delegate :argumentize, :optionize, to: Kamal::Utils
-  delegate :argumentize, :env_file_with_secrets, :optionize, to: Kamal::Utils
 
   attr_accessor :name
+  alias to_s name
 
   def initialize(name, config:)
-   @name, @config = name.inquiry, config
+    @name, @config = name.inquiry, config
+    @tagged_hosts ||= extract_tagged_hosts_from_config
   end
 
   def primary_host
@@ -13,87 +14,13 @@ class Kamal::Configuration::Role
   end
 
   def hosts
-    @hosts ||= extract_hosts_from_config
+    tagged_hosts.keys
   end
 
-  def labels
+  def env_tags(host)
-    default_labels.merge(traefik_labels).merge(custom_labels)
+    tagged_hosts.fetch(host).collect { |tag| config.env_tag(tag) }
   end
 
-  def label_args
-    argumentize "--label", labels
-  end
-
-  def env
-    if config.env && config.env["secret"]
-      merged_env_with_secrets
-    else
-      merged_env
-    end
-  end
-
-  def env_file
-    env_file_with_secrets env
-  end
-
-  def host_env_directory
-    File.join config.host_env_directory, "roles"
-  end
-
-  def host_env_file_path
-    File.join host_env_directory, "#{[config.service, name, config.destination].compact.join("-")}.env"
-  end
-
-  def env_args
-    argumentize "--env-file", host_env_file_path
-  end
-
-  def health_check_args(cord: true)
-    if health_check_cmd.present?
-      if cord && uses_cord?
-        optionize({ "health-cmd" => health_check_cmd_with_cord, "health-interval" => health_check_interval })
-          .concat(["--volume", "#{cord_host_directory}:#{cord_container_directory}"])
-      else
-        optionize({ "health-cmd" => health_check_cmd, "health-interval" => health_check_interval })
-      end
-    else
-      []
-    end
-  end
-
-  def health_check_cmd
-    health_check_options["cmd"] || http_health_check(port: health_check_options["port"], path: health_check_options["path"])
-  end
-
-  def health_check_cmd_with_cord
-    "(#{health_check_cmd}) && (stat #{cord_container_file} > /dev/null || exit 1)"
-  end
-
-  def health_check_interval
-    health_check_options["interval"] || "1s"
-  end
-
-  def uses_cord?
-    running_traefik? && cord_container_directory.present? && health_check_cmd.present?
-  end
-
-  def cord_host_directory
-    File.join config.run_directory_as_docker_volume, "cords", [full_name, config.run_id].join("-")
-  end
-
-  def cord_host_file
-    File.join cord_host_directory, CORD_FILE
-  end
-
-  def cord_container_directory
-    health_check_options.fetch("cord", nil)
-  end
-
-  def cord_container_file
-    File.join cord_container_directory, CORD_FILE
-  end
-
-
   def cmd
     specializations["cmd"]
   end
@@ -106,16 +33,105 @@ class Kamal::Configuration::Role
     end
   end
 
-  def running_traefik?
+  def labels
-    name.web? || specializations["traefik"]
+    default_labels.merge(custom_labels)
   end
 
-  def full_name
+  def label_args
+    argumentize "--label", labels
+  end
+
+  def logging_args
+    args = config.logging || {}
+    args.deep_merge!(specializations["logging"]) if specializations["logging"].present?
+
+    if args.any?
+      optionize({ "log-driver" => args["driver"] }.compact) +
+        argumentize("--log-opt", args["options"])
+    else
+      config.logging_args
+    end
+  end
+
+
+  def env(host)
+    @envs ||= {}
+    @envs[host] ||= [ base_env, specialized_env, *env_tags(host).map(&:env) ].reduce(:merge)
+  end
+
+  def env_args(host)
+    env(host).args
+  end
+
+  def asset_volume_args
+    asset_volume&.docker_args
+  end
+
+
+  def running_proxy?
+    if specializations["proxy"].nil?
+      primary?
+    else
+      specializations["proxy"]
+    end
+  end
+
+  def primary?
+    self == @config.primary_role
+  end
+
+
+  def container_name(version = nil)
+    [ container_prefix, version || config.version ].compact.join("-")
+  end
+
+  def container_prefix
     [ config.service, name, config.destination ].compact.join("-")
   end
 
+
+  def asset_path
+    specializations["asset_path"] || config.asset_path
+  end
+
+  def assets?
+    asset_path.present? && running_proxy?
+  end
+
+  def asset_volume(version = nil)
+    if assets?
+      Kamal::Configuration::Volume.new \
+        host_path: asset_volume_path(version), container_path: asset_path
+    end
+  end
+
+  def asset_extracted_path(version = nil)
+    File.join config.run_directory, "assets", "extracted", container_name(version)
+  end
+
+  def asset_volume_path(version = nil)
+    File.join config.run_directory, "assets", "volumes", container_name(version)
+  end
+
   private
-    attr_accessor :config
+    attr_accessor :config, :tagged_hosts
+
+    def extract_tagged_hosts_from_config
+      {}.tap do |tagged_hosts|
+        extract_hosts_from_config.map do |host_config|
+          if host_config.is_a?(Hash)
+            raise ArgumentError, "Multiple hosts found: #{host_config.inspect}" unless host_config.size == 1
+
+            host, tags = host_config.first
+            tagged_hosts[host] = Array(tags)
+          elsif host_config.is_a?(String) || host_config.is_a?(Symbol)
+            tagged_hosts[host_config] = []
+          else
+            raise ArgumentError, "Invalid host config: #{host_config.inspect}"
+          end
+        end
+      end
+    end
 
     def extract_hosts_from_config
       if config.servers.is_a?(Array)
@@ -127,31 +143,7 @@ class Kamal::Configuration::Role
     end
 
     def default_labels
-      if config.destination
+      { "service" => config.service, "role" => name, "destination" => config.destination }
-        { "service" => config.service, "role" => name, "destination" => config.destination }
-      else
-        { "service" => config.service, "role" => name }
-      end
-    end
-
-    def traefik_labels
-      if running_traefik?
-        {
-          # Setting a service property ensures that the generated service name will be consistent between versions
-          "traefik.http.services.#{traefik_service}.loadbalancer.server.scheme" => "http",
-
-          "traefik.http.routers.#{traefik_service}.rule" => "PathPrefix(`/`)",
-          "traefik.http.middlewares.#{traefik_service}-retry.retry.attempts" => "5",
-          "traefik.http.middlewares.#{traefik_service}-retry.retry.initialinterval" => "500ms",
-          "traefik.http.routers.#{traefik_service}.middlewares" => "#{traefik_service}-retry@docker"
-        }
-      else
-        {}
-      end
-    end
-
-    def traefik_service
-      [ config.service, name, config.destination ].compact.join("-")
     end
 
     def custom_labels
@@ -163,42 +155,20 @@ class Kamal::Configuration::Role
 
     def specializations
       if config.servers.is_a?(Array) || config.servers[name].is_a?(Array)
-        { }
+        {}
       else
         config.servers[name].except("hosts")
       end
     end
 
     def specialized_env
-      specializations["env"] || {}
+      Kamal::Configuration::Env.from_config config: specializations.fetch("env", {})
-    end
-
-    def merged_env
-      config.env&.merge(specialized_env) || {}
     end
 
     # Secrets are stored in an array, which won't merge by default, so have to do it by hand.
-    def merged_env_with_secrets
+    def base_env
-      merged_env.tap do |new_env|
+      Kamal::Configuration::Env.from_config \
-        new_env["secret"] = Array(config.env["secret"]) + Array(specialized_env["secret"])
+        config: config.env,
-
+        secrets_file: File.join(config.host_env_directory, "roles", "#{container_prefix}.env")
-        # If there's no secret/clear split, everything is clear
-        clear_app_env  = config.env["secret"] ? Array(config.env["clear"]) : Array(config.env["clear"] || config.env)
-        clear_role_env = specialized_env["secret"] ? Array(specialized_env["clear"]) : Array(specialized_env["clear"] || specialized_env)
-
-        new_env["clear"] = (clear_app_env + clear_role_env).uniq
-      end
-    end
-
-    def http_health_check(port:, path:)
-      "curl -f #{URI.join("http://localhost:#{port}", path)} || exit 1" if path.present? || port.present?
-    end
-
-    def health_check_options
-      @health_check_options ||= begin
-        options = specializations["healthcheck"] || {}
-        options = config.healthcheck.merge(options) if running_traefik?
-        options
-      end
     end
 end

lib/kamal/configuration/ssh.rb

@@ -9,6 +9,10 @@ class Kamal::Configuration::Ssh
     config.fetch("user", "root")
   end
 
+  def port
+    config.fetch("port", 22)
+  end
+
   def proxy
     if (proxy = config["proxy"])
       Net::SSH::Proxy::Jump.new(proxy.include?("@") ? proxy : "root@#{proxy}")
@@ -18,7 +22,7 @@ class Kamal::Configuration::Ssh
   end
 
   def options
-    { user: user, proxy: proxy, auth_methods: [ "publickey" ], logger: logger, keepalive: true, keepalive_interval: 30 }.compact
+    { user: user, port: port, proxy: proxy, logger: logger, keepalive: true, keepalive_interval: 30 }.compact
   end
 
   def to_h

lib/kamal/configuration/volume.rb

@@ -0,0 +1,22 @@
+class Kamal::Configuration::Volume
+  attr_reader :host_path, :container_path
+  delegate :argumentize, to: Kamal::Utils
+
+  def initialize(host_path:, container_path:)
+    @host_path = host_path
+    @container_path = container_path
+  end
+
+  def docker_args
+    argumentize "--volume", "#{host_path_for_docker_volume}:#{container_path}"
+  end
+
+  private
+    def host_path_for_docker_volume
+      if Pathname.new(host_path).absolute?
+        host_path
+      else
+        File.join "$(pwd)", host_path
+      end
+    end
+end

lib/kamal/env_file.rb

@@ -0,0 +1,38 @@
+# Encode an env hash as a string where secret values have been looked up and all values escaped for Docker.
+class Kamal::EnvFile
+  def initialize(env)
+    @env = env
+  end
+
+  def to_s
+    env_file = StringIO.new.tap do |contents|
+      @env.each do |key, value|
+        contents << docker_env_file_line(key, value)
+      end
+    end.string
+
+    # Ensure the file has some contents to avoid the SSHKIT empty file warning
+    env_file.presence || "\n"
+  end
+
+  alias to_str to_s
+
+  private
+    def docker_env_file_line(key, value)
+      "#{key}=#{escape_docker_env_file_value(value)}\n"
+    end
+
+    # Escape a value to make it safe to dump in a docker file.
+    def escape_docker_env_file_value(value)
+      # keep non-ascii(UTF-8) characters as it is
+      value.to_s.scan(/[\x00-\x7F]+|[^\x00-\x7F]+/).map do |part|
+        part.ascii_only? ? escape_docker_env_file_ascii_value(part) : part
+      end.join
+    end
+
+    def escape_docker_env_file_ascii_value(value)
+      # Doublequotes are treated literally in docker env files
+      # so remove leading and trailing ones and unescape any others
+      value.to_s.dump[1..-2].gsub(/\\"/, "\"")
+    end
+end

lib/kamal/git.rb

@@ -0,0 +1,23 @@
+module Kamal::Git
+  extend self
+
+  def used?
+    system("git rev-parse")
+  end
+
+  def user_name
+    `git config user.name`.strip
+  end
+
+  def revision
+    `git rev-parse HEAD`.strip
+  end
+
+  def uncommitted_changes
+    `git status --porcelain`.strip
+  end
+
+  def root
+    `git rev-parse --show-toplevel`.strip
+  end
+end

lib/kamal/sshkit_with_ext.rb

@@ -1,5 +1,6 @@
 require "sshkit"
 require "sshkit/dsl"
+require "net/scp"
 require "active_support/core_ext/hash/deep_merge"
 require "json"
 
@@ -102,3 +103,39 @@ class SSHKit::Backend::Netssh
 
   prepend LimitConcurrentStartsInstance
 end
+
+class SSHKit::Runner::Parallel
+  # SSHKit joins the threads in sequence and fails on the first error it encounters, which means that we wait threads
+  # before the first failure to complete but not for ones after.
+  #
+  # We'll patch it to wait for them all to complete, and to record all the threads that errored so we can see when a
+  # problem occurs on multiple hosts.
+  module CompleteAll
+    def execute
+      threads = hosts.map do |host|
+        Thread.new(host) do |h|
+          backend(h, &block).run
+        rescue ::StandardError => e
+          e2 = SSHKit::Runner::ExecuteError.new e
+          raise e2, "Exception while executing #{host.user ? "as #{host.user}@" : "on host "}#{host}: #{e.message}"
+        end
+      end
+
+      exceptions = []
+      threads.each do |t|
+        begin
+          t.join
+        rescue SSHKit::Runner::ExecuteError => e
+          exceptions << e
+        end
+      end
+      if exceptions.one?
+        raise exceptions.first
+      elsif exceptions.many?
+        raise exceptions.first, [ "Exceptions on #{exceptions.count} hosts:", exceptions.map(&:message) ].join("\n")
+      end
+    end
+  end
+
+  prepend CompleteAll
+end

lib/kamal/utils.rb

@@ -9,33 +9,13 @@ module Kamal::Utils
       if value.present?
         attr = "#{key}=#{escape_shell_value(value)}"
         attr = self.sensitive(attr, redaction: "#{key}=[REDACTED]") if sensitive
-        [ argument, attr]
+        [ argument, attr ]
       else
         [ argument, key ]
       end
     end
   end
 
-  def env_file_with_secrets(env)
-    env_file = StringIO.new.tap do |contents|
-      if (secrets = env["secret"]).present?
-        env.fetch("secret", env)&.each do |key|
-          contents << docker_env_file_line(key, ENV.fetch(key))
-        end
-        env["clear"]&.each do |key, value|
-          contents << docker_env_file_line(key, value)
-        end
-      else
-        env.fetch("clear", env)&.each do |key, value|
-          contents << docker_env_file_line(key, value)
-        end
-      end
-    end.string
-
-    # Ensure the file has some contents to avoid the SSHKIT empty file warning
-    env_file || "\n"
-  end
-
   # Returns a list of shell-dashed option arguments. If the value is true, it's treated like a value-less option.
   def optionize(args, with: nil)
     options = if with
@@ -49,7 +29,7 @@ module Kamal::Utils
 
   # Flattens a one-to-many structure into an array of two-element arrays each containing a key-value pair
   def flatten_args(args)
-    args.flat_map { |key, value| value.try(:map) { |entry| [key, entry] } || [ [ key, value ] ] }
+    args.flat_map { |key, value| value.try(:map) { |entry| [ key, entry ] } || [ [ key, value ] ] }
   end
 
   # Marks sensitive values for redaction in logs and human-visible output.
@@ -72,19 +52,6 @@ module Kamal::Utils
     end
   end
 
-  def unredacted(value)
-    case
-    when value.respond_to?(:unredacted)
-      value.unredacted
-    when value.respond_to?(:transform_values)
-      value.transform_values { |value| unredacted value }
-    when value.respond_to?(:map)
-      value.map { |element| unredacted element }
-    else
-      value
-    end
-  end
-
   # Escape a value to make it safe for shell use.
   def escape_shell_value(value)
     value.to_s.dump
@@ -92,27 +59,22 @@ module Kamal::Utils
       .gsub(DOLLAR_SIGN_WITHOUT_SHELL_EXPANSION_REGEX, '\$')
   end
 
-  # Abbreviate a git revhash for concise display
+  # Apply a list of host or role filters, including wildcard matches
-  def abbreviate_version(version)
+  def filter_specific_items(filters, items)
-    if version
+    matches = []
-      # Don't abbreviate <sha>_uncommitted_<etc>
+
-      if version.include?("_")
+    Array(filters).select do |filter|
-        version
+      matches += Array(items).select do |item|
-      else
+        # Only allow * for a wildcard
-        version[0...7]
+        # items are roles or hosts
+        File.fnmatch(filter, item.to_s, File::FNM_EXTGLOB)
       end
     end
+
+    matches.uniq
   end
 
-  def uncommitted_changes
+  def stable_sort!(elements, &block)
-    `git status --porcelain`.strip
+    elements.sort_by!.with_index { |element, index| [ block.call(element), index ] }
-  end
-
-  def docker_env_file_line(key, value)
-    if key.include?("\n") || value.to_s.include?("\n")
-      raise ArgumentError, "docker env file format does not support newlines in keys or values, key: #{key}"
-    end
-
-    "#{key.to_s}=#{value.to_s}\n"
   end
 end

lib/kamal/utils/healthcheck_poller.rb

@@ -1,64 +0,0 @@
-class Kamal::Utils::HealthcheckPoller
-  TRAEFIK_UPDATE_DELAY = 2
-
-  class HealthcheckError < StandardError; end
-
-  class << self
-    def wait_for_healthy(pause_after_ready: false, &block)
-      attempt = 1
-      max_attempts = KAMAL.config.healthcheck["max_attempts"]
-
-      begin
-        case status = block.call
-        when "healthy"
-          sleep TRAEFIK_UPDATE_DELAY if pause_after_ready
-        when "running" # No health check configured
-          sleep KAMAL.config.readiness_delay if pause_after_ready
-        else
-          raise HealthcheckError, "container not ready (#{status})"
-        end
-      rescue HealthcheckError => e
-        if attempt <= max_attempts
-          info "#{e.message}, retrying in #{attempt}s (attempt #{attempt}/#{max_attempts})..."
-          sleep attempt
-          attempt += 1
-          retry
-        else
-          raise
-        end
-      end
-
-      info "Container is healthy!"
-    end
-
-    def wait_for_unhealthy(pause_after_ready: false, &block)
-      attempt = 1
-      max_attempts = KAMAL.config.healthcheck["max_attempts"]
-
-      begin
-        case status = block.call
-        when "unhealthy"
-          sleep TRAEFIK_UPDATE_DELAY if pause_after_ready
-        else
-          raise HealthcheckError, "container not unhealthy (#{status})"
-        end
-      rescue HealthcheckError => e
-        if attempt <= max_attempts
-          info "#{e.message}, retrying in #{attempt}s (attempt #{attempt}/#{max_attempts})..."
-          sleep attempt
-          attempt += 1
-          retry
-        else
-          raise
-        end
-      end
-
-      info "Container is unhealthy!"
-    end
-
-    private
-      def info(message)
-        SSHKit.config.output.info(message)
-      end
-  end
-end

lib/kamal/utils/sensitive.rb

@@ -1,4 +1,5 @@
 require "active_support/core_ext/module/delegation"
+require "sshkit"
 
 class Kamal::Utils::Sensitive
   # So SSHKit knows to redact these values.

lib/kamal/version.rb

@@ -1,3 +1,3 @@
 module Kamal
-  VERSION = "0.16.1"
+  VERSION = "1.5.2"
 end

test/cli/accessory_test.rb

@@ -7,7 +7,7 @@ class CliAccessoryTest < CliTestCase
 
     run_command("boot", "mysql").tap do |output|
       assert_match /docker login.*on 1.1.1.3/, output
-      assert_match "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --volume $PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf --volume $PWD/app-mysql/data:/var/lib/mysql --label service=\"app-mysql\" mysql:5.7 on 1.1.1.3", output
+      assert_match "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" --volume $PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf --volume $PWD/app-mysql/data:/var/lib/mysql --label service=\"app-mysql\" mysql:5.7 on 1.1.1.3", output
     end
   end
 
@@ -21,7 +21,7 @@ class CliAccessoryTest < CliTestCase
       assert_match /docker login.*on 1.1.1.3/, output
       assert_match /docker login.*on 1.1.1.1/, output
       assert_match /docker login.*on 1.1.1.2/, output
-      assert_match "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --volume $PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf --volume $PWD/app-mysql/data:/var/lib/mysql --label service=\"app-mysql\" mysql:5.7 on 1.1.1.3", output
+      assert_match "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" --volume $PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf --volume $PWD/app-mysql/data:/var/lib/mysql --label service=\"app-mysql\" mysql:5.7 on 1.1.1.3", output
       assert_match "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume $PWD/app-redis/data:/data --label service=\"app-redis\" redis:latest on 1.1.1.1", output
       assert_match "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume $PWD/app-redis/data:/data --label service=\"app-redis\" redis:latest on 1.1.1.2", output
     end
@@ -48,6 +48,18 @@ class CliAccessoryTest < CliTestCase
     run_command("reboot", "mysql")
   end
 
+  test "reboot all" do
+    Kamal::Commands::Registry.any_instance.expects(:login).times(3)
+    Kamal::Cli::Accessory.any_instance.expects(:stop).with("mysql")
+    Kamal::Cli::Accessory.any_instance.expects(:remove_container).with("mysql")
+    Kamal::Cli::Accessory.any_instance.expects(:boot).with("mysql", login: false)
+    Kamal::Cli::Accessory.any_instance.expects(:stop).with("redis")
+    Kamal::Cli::Accessory.any_instance.expects(:remove_container).with("redis")
+    Kamal::Cli::Accessory.any_instance.expects(:boot).with("redis", login: false)
+
+    run_command("reboot", "all")
+  end
+
   test "start" do
     assert_match "docker container start app-mysql", run_command("start", "mysql")
   end
@@ -64,11 +76,20 @@ class CliAccessoryTest < CliTestCase
   end
 
   test "details" do
-    assert_match "docker ps --filter label=service=app-mysql", run_command("details", "mysql")
+    run_command("details", "mysql").tap do |output|
+      assert_match "docker ps --filter label=service=app-mysql", output
+      assert_match "Accessory mysql Host: 1.1.1.3", output
+    end
+  end
+
+  test "details with non-existent accessory" do
+    assert_equal "No accessory by the name of 'hello' (options: mysql and redis)", stderred { run_command("details", "hello") }
   end
 
   test "details with all" do
     run_command("details", "all").tap do |output|
+      assert_match "Accessory mysql Host: 1.1.1.3", output
+      assert_match "Accessory redis Host: 1.1.1.2", output
       assert_match "docker ps --filter label=service=app-mysql", output
       assert_match "docker ps --filter label=service=app-redis", output
     end
@@ -97,7 +118,7 @@ class CliAccessoryTest < CliTestCase
 
   test "logs with follow" do
     SSHKit::Backend::Abstract.any_instance.stubs(:exec)
-      .with("ssh -t root@1.1.1.3 'docker logs app-mysql --timestamps --tail 10 --follow 2>&1'")
+      .with("ssh -t root@1.1.1.3 -p 22 'docker logs app-mysql --timestamps --tail 10 --follow 2>&1'")
 
     assert_match "docker logs app-mysql --timestamps --tail 10 --follow 2>&1", run_command("logs", "mysql", "--follow")
   end
@@ -136,8 +157,32 @@ class CliAccessoryTest < CliTestCase
     assert_match "rm -rf app-mysql", run_command("remove_service_directory", "mysql")
   end
 
+  test "hosts param respected" do
+    Kamal::Cli::Accessory.any_instance.expects(:directories).with("redis")
+    Kamal::Cli::Accessory.any_instance.expects(:upload).with("redis")
+
+    run_command("boot", "redis", "--hosts", "1.1.1.1").tap do |output|
+      assert_match /docker login.*on 1.1.1.1/, output
+      assert_no_match /docker login.*on 1.1.1.2/, output
+      assert_match "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume $PWD/app-redis/data:/data --label service=\"app-redis\" redis:latest on 1.1.1.1", output
+      assert_no_match "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume $PWD/app-redis/data:/data --label service=\"app-redis\" redis:latest on 1.1.1.2", output
+    end
+  end
+
+  test "hosts param intersected with configuration" do
+    Kamal::Cli::Accessory.any_instance.expects(:directories).with("redis")
+    Kamal::Cli::Accessory.any_instance.expects(:upload).with("redis")
+
+    run_command("boot", "redis", "--hosts", "1.1.1.1,1.1.1.3").tap do |output|
+      assert_match /docker login.*on 1.1.1.1/, output
+      assert_no_match /docker login.*on 1.1.1.3/, output
+      assert_match "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume $PWD/app-redis/data:/data --label service=\"app-redis\" redis:latest on 1.1.1.1", output
+      assert_no_match "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume $PWD/app-redis/data:/data --label service=\"app-redis\" redis:latest on 1.1.1.3", output
+    end
+  end
+
   private
     def run_command(*command)
-      stdouted { Kamal::Cli::Accessory.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Accessory.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
     end
 end

test/cli/app_test.rb

@@ -11,7 +11,6 @@ class CliAppTest < CliTestCase
   end
 
   test "boot will rename if same version is already running" do
-    Object.any_instance.stubs(:sleep)
     run_command("details") # Preheat Kamal const
 
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
@@ -19,20 +18,13 @@ class CliAppTest < CliTestCase
       .returns("12345678") # running version
 
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
-      .returns("running") # health check
-
-    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=web", "--filter", "status=running", "--filter", "status=restarting", "--latest", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
       .returns("123") # old version
 
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :inspect, "-f '{{ range .Mounts }}{{ .Source }} {{ .Destination }} {{ end }}'", "app-web-123", "|", :awk, "'$2 == \"/tmp/kamal-cord\" {print $1}'", :raise_on_non_zero_exit => false)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
-      .returns("cordfile") # old version
+      .returns("172.1.0.2:80")
-
+      .at_least_once
-    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-      .returns("unhealthy") # old version unhealthy
 
     run_command("boot").tap do |output|
       assert_match /Renaming container .* to .* as already deployed on 1.1.1.1/, output # Rename
@@ -45,7 +37,7 @@ class CliAppTest < CliTestCase
   end
 
   test "boot uses group strategy when specified" do
-    Kamal::Cli::App.any_instance.stubs(:on).with("1.1.1.1").twice # acquire & release lock
+    Kamal::Cli::App.any_instance.stubs(:on).with("1.1.1.1").times(3) # ensure locks dir, acquire & release lock
     Kamal::Cli::App.any_instance.stubs(:on).with([ "1.1.1.1" ]) # tag container
 
     # Strategy is used when booting the containers
@@ -54,19 +46,123 @@ class CliAppTest < CliTestCase
     run_command("boot", config: :with_boot_strategy)
   end
 
-  test "boot errors leave lock in place" do
+  test "boot errors don't leave lock in place" do
-    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999" }
-
     Kamal::Cli::App.any_instance.expects(:using_version).raises(RuntimeError)
 
-    assert !KAMAL.holding_lock?
+    assert_not KAMAL.holding_lock?
     assert_raises(RuntimeError) do
       stderred { run_command("boot") }
     end
-    assert KAMAL.holding_lock?
+    assert_not KAMAL.holding_lock?
+  end
+
+  test "boot with assets" do
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", raise_on_non_zero_exit: false)
+      .returns("12345678") # running version
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
+      .returns("123").twice # old version
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
+      .returns("172.1.0.2:80").at_least_once
+
+    run_command("boot", config: :with_assets).tap do |output|
+      assert_match "docker tag dhh/app:latest dhh/app:latest", output
+      assert_match "/usr/bin/env mkdir -p .kamal/assets/volumes/app-web-latest ; cp -rnT .kamal/assets/extracted/app-web-latest .kamal/assets/volumes/app-web-latest ; cp -rnT .kamal/assets/extracted/app-web-latest .kamal/assets/volumes/app-web-123 || true ; cp -rnT .kamal/assets/extracted/app-web-123 .kamal/assets/volumes/app-web-latest || true", output
+      assert_match "/usr/bin/env mkdir -p .kamal/assets/extracted/app-web-latest && docker stop -t 1 app-web-assets 2> /dev/null || true && docker run --name app-web-assets --detach --rm dhh/app:latest sleep 1000000 && docker cp -L app-web-assets:/public/assets/. .kamal/assets/extracted/app-web-latest && docker stop -t 1 app-web-assets", output
+      assert_match /docker run --detach --restart unless-stopped --name app-web-latest --hostname 1.1.1.1-[0-9a-f]{12} /, output
+      assert_match "docker container ls --all --filter name=^app-web-123$ --quiet | xargs docker stop", output
+      assert_match "/usr/bin/env find .kamal/assets/extracted -maxdepth 1 -name 'app-web-*' ! -name app-web-latest -exec rm -rf \"{}\" + ; find .kamal/assets/volumes -maxdepth 1 -name 'app-web-*' ! -name app-web-latest -exec rm -rf \"{}\" +", output
+    end
+  end
+
+  test "boot with host tags" do
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", raise_on_non_zero_exit: false)
+      .returns("12345678") # running version
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
+      .returns("123") # old version
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
+      .returns("172.1.0.2:80").at_least_once
+
+    run_command("boot", config: :with_env_tags).tap do |output|
+      assert_match "docker tag dhh/app:latest dhh/app:latest", output
+      assert_match %r{docker run --detach --restart unless-stopped --name app-web-latest --hostname 1.1.1.1-[0-9a-f]{12} -e KAMAL_CONTAINER_NAME="app-web-latest" -e KAMAL_VERSION="latest" --env-file .kamal/env/roles/app-web.env --env TEST="root" --env EXPERIMENT="disabled" --env SITE="site1"}, output
+      assert_match "docker container ls --all --filter name=^app-web-123$ --quiet | xargs docker stop", output
+    end
+  end
+
+  test "boot with web barrier opened" do
+    SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info).returns("")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
+      .returns("172.1.0.2:80").at_least_once
+
+    run_command("boot", config: :with_roles, host: nil).tap do |output|
+      assert_match "Waiting for the first healthy web container before booting workers on 1.1.1.3...", output
+      assert_match "Waiting for the first healthy web container before booting workers on 1.1.1.4...", output
+      assert_match "First web container is healthy, booting workers on 1.1.1.3", output
+      assert_match "First web container is healthy, booting workers on 1.1.1.4", output
+    end
+  end
+
+  test "boot with web barrier closed" do
+    Thread.report_on_exception = false
+
+    SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info).returns("")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", raise_on_non_zero_exit: false)
+      .returns("abcdef123456")
+      .twice # web container id
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-workers-latest$", "--quiet", raise_on_non_zero_exit: false)
+      .returns("abcdef123456")
+      .twice # worker container id
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info).with { |*args| args[0..1] == [ :sh, "-c" ] }.returns("123").at_least_once
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
+      .returns("172.1.0.2:80")
+      .at_least_once
+
+    SSHKit::Backend::Abstract.any_instance.stubs(:execute).returns("")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:docker, :exec, "kamal-proxy", "kamal-proxy", :deploy, "app-web", "--target", "\"172.1.0.2:80\"").raises(SSHKit::Command::Failed, "Deploy failed").at_least_once
+
+    stderred do
+      run_command("boot", config: :with_roles, host: nil, allowed_error_message: "Deploy failed").tap do |output|
+        assert_match "Waiting for the first healthy web container before booting workers on 1.1.1.3...", output
+        assert_match "Waiting for the first healthy web container before booting workers on 1.1.1.4...", output
+        assert_match "First web container is unhealthy, not booting workers on 1.1.1.3", output
+        assert_match "First web container is unhealthy, not booting workers on 1.1.1.4", output
+      end
+    end
+  ensure
+    Thread.report_on_exception = true
   end
 
   test "start" do
+    # SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info).returns("")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
+      .returns("123") # current version
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
+      .returns("172.1.0.2:80")
+      .at_least_once
+
     run_command("start").tap do |output|
       assert_match "docker start app-web-999", output
     end
@@ -74,14 +170,18 @@ class CliAppTest < CliTestCase
 
   test "stop" do
     run_command("stop").tap do |output|
-      assert_match "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker stop", output
+      assert_match "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker stop", output
     end
   end
 
   test "stale_containers" do
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
       .with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=web", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
-      .returns("12345678\n87654321")
+      .returns("12345678\n87654321\n")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
+      .returns("12345678\n")
 
     run_command("stale_containers").tap do |output|
       assert_match /Detected stale container for role web with version 87654321/, output
@@ -91,7 +191,11 @@ class CliAppTest < CliTestCase
   test "stop stale_containers" do
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
       .with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=web", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
-      .returns("12345678\n87654321")
+      .returns("12345678\n87654321\n")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
+      .returns("12345678\n")
 
     run_command("stale_containers", "--stop").tap do |output|
       assert_match /Stopping stale container for role web with version 87654321/, output
@@ -107,7 +211,7 @@ class CliAppTest < CliTestCase
 
   test "remove" do
     run_command("remove").tap do |output|
-      assert_match /#{Regexp.escape("docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker stop")}/, output
+      assert_match /#{Regexp.escape("sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker stop")}/, output
       assert_match /#{Regexp.escape("docker container prune --force --filter label=service=app")}/, output
       assert_match /#{Regexp.escape("docker image prune --all --force --filter label=service=app")}/, output
     end
@@ -133,17 +237,36 @@ class CliAppTest < CliTestCase
 
   test "exec" do
     run_command("exec", "ruby -v").tap do |output|
-      assert_match "docker run --rm dhh/app:latest ruby -v", output
+      assert_match "docker run --rm --env-file .kamal/env/roles/app-web.env dhh/app:latest ruby -v", output
     end
   end
 
   test "exec with reuse" do
     run_command("exec", "--reuse", "ruby -v").tap do |output|
-      assert_match "docker ps --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest --format \"{{.Names}}\" | while read line; do echo ${line#app-web-}; done", output # Get current version
+      assert_match "sh -c 'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | while read line; do echo ${line#app-web-}; done", output # Get current version
       assert_match "docker exec app-web-999 ruby -v", output
     end
   end
 
+  test "exec interactive" do
+    SSHKit::Backend::Abstract.any_instance.expects(:exec)
+      .with("ssh -t root@1.1.1.1 -p 22 'docker run -it --rm --env-file .kamal/env/roles/app-web.env dhh/app:latest ruby -v'")
+    run_command("exec", "-i", "ruby -v").tap do |output|
+      assert_match "Get most recent version available as an image...", output
+      assert_match "Launching interactive command with version latest via SSH from new container on 1.1.1.1...", output
+    end
+  end
+
+  test "exec interactive with reuse" do
+    SSHKit::Backend::Abstract.any_instance.expects(:exec)
+      .with("ssh -t root@1.1.1.1 -p 22 'docker exec -it app-web-999 ruby -v'")
+    run_command("exec", "-i", "--reuse", "ruby -v").tap do |output|
+      assert_match "Get current version of running container...", output
+      assert_match "Running /usr/bin/env sh -c 'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | while read line; do echo ${line#app-web-}; done on 1.1.1.1", output
+      assert_match "Launching interactive command with version 999 via SSH from existing container on 1.1.1.1...", output
+    end
+  end
+
   test "containers" do
     run_command("containers").tap do |output|
       assert_match "docker container ls --all --filter label=service=app", output
@@ -158,47 +281,61 @@ class CliAppTest < CliTestCase
 
   test "logs" do
     SSHKit::Backend::Abstract.any_instance.stubs(:exec)
-      .with("ssh -t root@1.1.1.1 'docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest| xargs docker logs --timestamps --tail 10 2>&1'")
+      .with("ssh -t root@1.1.1.1 'sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1| xargs docker logs --timestamps --tail 10 2>&1'")
 
-    assert_match "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --tail 100 2>&1", run_command("logs")
+    assert_match "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs --tail 100 2>&1", run_command("logs")
   end
 
   test "logs with follow" do
     SSHKit::Backend::Abstract.any_instance.stubs(:exec)
-      .with("ssh -t root@1.1.1.1 'docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --timestamps --tail 10 --follow 2>&1'")
+      .with("ssh -t root@1.1.1.1 -p 22 'sh -c '\\''docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''\\'\\'''\\''{{.ID}}'\\''\\'\\'''\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'\\'' | head -1 | xargs docker logs --timestamps --tail 10 --follow 2>&1'")
 
-    assert_match "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --timestamps --tail 10 --follow 2>&1", run_command("logs", "--follow")
+    assert_match "sh -c '\\''docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''\\'\\'''\\''{{.ID}}'\\''\\'\\'''\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'\\'' | head -1 | xargs docker logs --timestamps --tail 10 --follow 2>&1", run_command("logs", "--follow")
   end
 
   test "version" do
     run_command("version").tap do |output|
-      assert_match "docker ps --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest --format \"{{.Names}}\" | while read line; do echo ${line#app-web-}; done", output
+      assert_match "sh -c 'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | while read line; do echo ${line#app-web-}; done", output
     end
   end
 
 
   test "version through main" do
-    stdouted { Kamal::Cli::Main.start(["app", "version", "-c", "test/fixtures/deploy_with_accessories.yml", "--hosts", "1.1.1.1"]) }.tap do |output|
+    stdouted { Kamal::Cli::Main.start([ "app", "version", "-c", "test/fixtures/deploy_with_accessories.yml", "--hosts", "1.1.1.1" ]) }.tap do |output|
-      assert_match "docker ps --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest --format \"{{.Names}}\" | while read line; do echo ${line#app-web-}; done", output
+      assert_match "sh -c 'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | while read line; do echo ${line#app-web-}; done", output
+    end
+  end
+
+  test "long hostname" do
+    stub_running
+
+    hostname = "this-hostname-is-really-unacceptably-long-to-be-honest.example.com"
+
+    stdouted { Kamal::Cli::App.start([ "boot", "-c", "test/fixtures/deploy_with_uncommon_hostnames.yml", "--hosts", hostname ]) }.tap do |output|
+      assert_match /docker run --detach --restart unless-stopped --name app-web-latest --hostname this-hostname-is-really-unacceptably-long-to-be-hon-[0-9a-f]{12} /, output
+    end
+  end
+
+  test "hostname is trimmed if will end with a period" do
+    stub_running
+
+    hostname = "this-hostname-with-random-part-is-too-long.example.com"
+
+    stdouted { Kamal::Cli::App.start([ "boot", "-c", "test/fixtures/deploy_with_uncommon_hostnames.yml", "--hosts", hostname ]) }.tap do |output|
+      assert_match /docker run --detach --restart unless-stopped --name app-web-latest --hostname this-hostname-with-random-part-is-too-long.example-[0-9a-f]{12} /, output
     end
   end
 
   private
-    def run_command(*command, config: :with_accessories)
+    def run_command(*command, config: :with_accessories, host: "1.1.1.1", allowed_error_message: nil)
-      stdouted { Kamal::Cli::App.start([*command, "-c", "test/fixtures/deploy_#{config}.yml", "--hosts", "1.1.1.1"]) }
+      stdouted do
+        Kamal::Cli::App.start([ *command, "-c", "test/fixtures/deploy_#{config}.yml", *([ "--hosts", host ] if host) ])
+      rescue SSHKit::Runner::ExecuteError => e
+        raise e unless allowed_error_message && e.message.include?(allowed_error_message)
+      end
     end
 
     def stub_running
-      Object.any_instance.stubs(:sleep)
-
       SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info).returns("123") # old version
-
-      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-        .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-latest$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-        .returns("running") # health check
-
-      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-        .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-        .returns("unhealthy") # health check
     end
 end

test/cli/build_test.rb

@@ -9,29 +9,137 @@ class CliBuildTest < CliTestCase
   end
 
   test "push" do
+    with_build_directory do |build_directory|
+      Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
+      hook_variables = { version: 999, service_version: "app@999", hosts: "1.1.1.1,1.1.1.2,1.1.1.3,1.1.1.4", command: "build", subcommand: "push" }
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :"rev-parse", :HEAD)
+        .returns(Kamal::Git.revision)
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :status, "--porcelain")
+        .returns("")
+
+      run_command("push", "--verbose").tap do |output|
+        assert_hook_ran "pre-build", output, **hook_variables
+        assert_match /Cloning repo into build directory/, output
+        assert_match /git -C #{Dir.tmpdir}\/kamal-clones\/app-#{pwd_sha} clone #{Dir.pwd}/, output
+        assert_match /docker --version && docker buildx version/, output
+        assert_match /docker buildx build --push --platform linux\/amd64,linux\/arm64 --builder kamal-app-multiarch -t dhh\/app:999 -t dhh\/app:latest --label service="app" --file Dockerfile \. as .*@localhost/, output
+      end
+    end
+  end
+
+  test "push resetting clone" do
+    with_build_directory do |build_directory|
+      stub_setup
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:docker, "--version", "&&", :docker, :buildx, "version")
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute)
+        .with(:git, "-C", "#{Dir.tmpdir}/kamal-clones/app-#{pwd_sha}", :clone, Dir.pwd)
+        .raises(SSHKit::Command::Failed.new("fatal: destination path 'kamal' already exists and is not an empty directory"))
+        .then
+        .returns(true)
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:git, "-C", build_directory, :remote, "set-url", :origin, Dir.pwd)
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:git, "-C", build_directory, :fetch, :origin)
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:git, "-C", build_directory, :reset, "--hard", Kamal::Git.revision)
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:git, "-C", build_directory, :clean, "-fdx")
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute)
+        .with(:docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "kamal-app-multiarch", "-t", "dhh/app:999", "-t", "dhh/app:latest", "--label", "service=\"app\"", "--file", "Dockerfile", ".")
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :"rev-parse", :HEAD)
+        .returns(Kamal::Git.revision)
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :status, "--porcelain")
+        .returns("")
+
+      run_command("push", "--verbose").tap do |output|
+        assert_match /Cloning repo into build directory/, output
+        assert_match /Resetting local clone/, output
+      end
+    end
+  end
+
+  test "push without clone" do
     Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
     hook_variables = { version: 999, service_version: "app@999", hosts: "1.1.1.1,1.1.1.2,1.1.1.3,1.1.1.4", command: "build", subcommand: "push" }
 
-    run_command("push").tap do |output|
+    run_command("push", "--verbose", fixture: :without_clone).tap do |output|
+      assert_no_match /Cloning repo into build directory/, output
       assert_hook_ran "pre-build", output, **hook_variables
       assert_match /docker --version && docker buildx version/, output
-      assert_match /docker buildx build --push --platform linux\/amd64,linux\/arm64 --builder kamal-app-multiarch -t dhh\/app:999 -t dhh\/app:latest --label service="app" --file Dockerfile \. as .*@localhost/, output
+      assert_match /docker buildx build --push --platform linux\/amd64,linux\/arm64 --builder kamal-app-multiarch -t dhh\/app:999 -t dhh\/app:latest --label service="app" --file Dockerfile . as .*@localhost/, output
+    end
+  end
+
+  test "push with corrupt clone" do
+    with_build_directory do |build_directory|
+      stub_setup
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:docker, "--version", "&&", :docker, :buildx, "version")
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute)
+        .with(:git, "-C", "#{Dir.tmpdir}/kamal-clones/app-#{pwd_sha}", :clone, Dir.pwd)
+        .raises(SSHKit::Command::Failed.new("fatal: destination path 'kamal' already exists and is not an empty directory"))
+        .then
+        .returns(true)
+        .twice
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:git, "-C", build_directory, :remote, "set-url", :origin, Dir.pwd)
+        .raises(SSHKit::Command::Failed.new("fatal: not a git repository"))
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :"rev-parse", :HEAD)
+        .returns(Kamal::Git.revision)
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :status, "--porcelain")
+        .returns("")
+
+      Dir.stubs(:chdir)
+
+      run_command("push", "--verbose") do |output|
+        assert_match /Cloning repo into build directory `#{build_directory}`\.\.\..*Cloning repo into build directory `#{build_directory}`\.\.\./, output
+        assert_match "Resetting local clone as `#{build_directory}` already exists...", output
+        assert_match "Error preparing clone: Failed to clone repo: fatal: not a git repository, deleting and retrying...", output
+      end
     end
   end
 
   test "push without builder" do
-    stub_setup
+    with_build_directory do |build_directory|
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+      stub_setup
-      .with(:docker, "--version", "&&", :docker, :buildx, "version")
 
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+      SSHKit::Backend::Abstract.any_instance.expects(:execute)
-      .with { |*args| args[0..1] == [:docker, :buildx] }
+        .with(:docker, "--version", "&&", :docker, :buildx, "version")
-      .raises(SSHKit::Command::Failed.new("no builder"))
-      .then
-      .returns(true)
 
-    run_command("push").tap do |output|
+      SSHKit::Backend::Abstract.any_instance.expects(:execute)
-      assert_match /Missing compatible builder, so creating a new one first/, output
+        .with(:docker, :buildx, :create, "--use", "--name", "kamal-app-multiarch")
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute)
+        .with { |*args| args[0..1] == [ :docker, :buildx ] }
+        .raises(SSHKit::Command::Failed.new("no builder"))
+        .then
+        .returns(true)
+
+      SSHKit::Backend::Abstract.any_instance.expects(:execute).with { |*args| args.first.start_with?("git") }
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :"rev-parse", :HEAD)
+        .returns(Kamal::Git.revision)
+
+      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+        .with(:git, "-C", anything, :status, "--porcelain")
+        .returns("")
+
+      run_command("push").tap do |output|
+        assert_match /WARN Missing compatible builder, so creating a new one first/, output
+      end
     end
   end
 
@@ -48,15 +156,17 @@ class CliBuildTest < CliTestCase
   test "push pre-build hook failure" do
     fail_hook("pre-build")
 
-    assert_raises(Kamal::Cli::HookError) { run_command("push") }
+    error = assert_raises(Kamal::Cli::HookError) { run_command("push") }
+    assert_equal "Hook `pre-build` failed:\nfailed", error.message
 
-    assert @executions.none? { |args| args[0..2] == [:docker, :buildx, :build] }
+    assert @executions.none? { |args| args[0..2] == [ :docker, :buildx, :build ] }
   end
 
   test "pull" do
     run_command("pull").tap do |output|
       assert_match /docker image rm --force dhh\/app:999/, output
       assert_match /docker pull dhh\/app:999/, output
+      assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
     end
   end
 
@@ -66,6 +176,22 @@ class CliBuildTest < CliTestCase
     end
   end
 
+  test "create remote" do
+    run_command("create", fixture: :with_remote_builder).tap do |output|
+      assert_match "Running /usr/bin/env true on 1.1.1.5", output
+      assert_match "docker context create kamal-app-native-remote-amd64 --description 'kamal-app-native-remote amd64 native host' --docker 'host=ssh://app@1.1.1.5'", output
+      assert_match "docker buildx create --name kamal-app-native-remote kamal-app-native-remote-amd64 --platform linux/amd64", output
+    end
+  end
+
+  test "create remote with custom ports" do
+    run_command("create", fixture: :with_remote_builder_and_custom_ports).tap do |output|
+      assert_match "Running /usr/bin/env true on 1.1.1.5", output
+      assert_match "docker context create kamal-app-native-remote-amd64 --description 'kamal-app-native-remote amd64 native host' --docker 'host=ssh://app@1.1.1.5:2122'", output
+      assert_match "docker buildx create --name kamal-app-native-remote kamal-app-native-remote-amd64 --platform linux/amd64", output
+    end
+  end
+
   test "create with error" do
     stub_setup
     SSHKit::Backend::Abstract.any_instance.stubs(:execute)
@@ -95,14 +221,27 @@ class CliBuildTest < CliTestCase
   end
 
   private
-    def run_command(*command)
+    def run_command(*command, fixture: :with_accessories)
-      stdouted { Kamal::Cli::Build.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Build.start([ *command, "-c", "test/fixtures/deploy_#{fixture}.yml" ]) }
     end
 
     def stub_dependency_checks
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
         .with(:docker, "--version", "&&", :docker, :buildx, "version")
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-        .with { |*args| args[0..1] == [:docker, :buildx] }
+        .with { |*args| args[0..1] == [ :docker, :buildx ] }
+    end
+
+    def with_build_directory
+      build_directory = File.join Dir.tmpdir, "kamal-clones", "app-#{pwd_sha}", "kamal"
+      FileUtils.mkdir_p build_directory
+      FileUtils.touch File.join build_directory, "Dockerfile"
+      yield build_directory + "/"
+    ensure
+      FileUtils.rm_rf build_directory
+    end
+
+    def pwd_sha
+      Digest::SHA256.hexdigest(Dir.pwd)[0..12]
     end
 end

test/cli/cli_test_case.rb

@@ -21,7 +21,7 @@ class CliTestCase < ActiveSupport::TestCase
       Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
 
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-        .with { |*args| @executions << args; args != [".kamal/hooks/#{hook}"] }
+        .with { |*args| @executions << args; args != [ ".kamal/hooks/#{hook}" ] }
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
         .with { |*args| args.first == ".kamal/hooks/#{hook}" }
         .raises(SSHKit::Command::Failed.new("failed"))
@@ -31,12 +31,14 @@ class CliTestCase < ActiveSupport::TestCase
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
         .with { |*args| args == [ :mkdir, "-p", ".kamal" ] }
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-        .with { |arg1, arg2| arg1 == :mkdir && arg2 == ".kamal/lock-app" }
+        .with { |arg1, arg2, arg3| arg1 == :mkdir && arg2 == "-p" && arg3 == ".kamal/locks" }
       SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-        .with { |arg1, arg2| arg1 == :rm && arg2 == ".kamal/lock-app/details" }
+        .with { |arg1, arg2| arg1 == :mkdir && arg2 == ".kamal/locks/app" }
+      SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+        .with { |arg1, arg2| arg1 == :rm && arg2 == ".kamal/locks/app/details" }
     end
 
-    def assert_hook_ran(hook, output, version:, service_version:, hosts:, command:, subcommand: nil, runtime: nil)
+    def assert_hook_ran(hook, output, version:, service_version:, hosts:, command:, subcommand: nil, runtime: false)
       performer = `whoami`.strip
 
       assert_match "Running the #{hook} hook...\n", output
@@ -50,7 +52,7 @@ class CliTestCase < ActiveSupport::TestCase
         KAMAL_HOSTS=\"#{hosts}\"\s
         KAMAL_COMMAND=\"#{command}\"\s
         #{"KAMAL_SUBCOMMAND=\\\"#{subcommand}\\\"\\s" if subcommand}
-        #{"KAMAL_RUNTIME=\\\"#{runtime}\\\"\\s" if runtime}
+        #{"KAMAL_RUNTIME=\\\"\\d+\\\"\\s" if runtime}
         ;\s/usr/bin/env\s\.kamal/hooks/#{hook} }x
 
       assert_match expected, output

test/cli/env_test.rb

@@ -4,16 +4,12 @@ class CliEnvTest < CliTestCase
   test "push" do
     run_command("push").tap do |output|
       assert_match "Running /usr/bin/env mkdir -p .kamal/env/roles on 1.1.1.1", output
-      assert_match "Running /usr/bin/env mkdir -p .kamal/env/traefik on 1.1.1.1", output
       assert_match "Running /usr/bin/env mkdir -p .kamal/env/accessories on 1.1.1.1", output
       assert_match "Running /usr/bin/env mkdir -p .kamal/env/roles on 1.1.1.1", output
-      assert_match "Running /usr/bin/env mkdir -p .kamal/env/traefik on 1.1.1.2", output
       assert_match "Running /usr/bin/env mkdir -p .kamal/env/accessories on 1.1.1.1", output
       assert_match ".kamal/env/roles/app-web.env", output
       assert_match ".kamal/env/roles/app-workers.env", output
-      assert_match ".kamal/env/traefik/traefik.env", output
       assert_match ".kamal/env/accessories/app-redis.env", output
-
     end
   end
 
@@ -23,8 +19,6 @@ class CliEnvTest < CliTestCase
       assert_match "Running /usr/bin/env rm -f .kamal/env/roles/app-web.env on 1.1.1.2", output
       assert_match "Running /usr/bin/env rm -f .kamal/env/roles/app-workers.env on 1.1.1.3", output
       assert_match "Running /usr/bin/env rm -f .kamal/env/roles/app-workers.env on 1.1.1.4", output
-      assert_match "Running /usr/bin/env rm -f .kamal/env/traefik/traefik.env on 1.1.1.1", output
-      assert_match "Running /usr/bin/env rm -f .kamal/env/traefik/traefik.env on 1.1.1.2", output
       assert_match "Running /usr/bin/env rm -f .kamal/env/accessories/app-redis.env on 1.1.1.1", output
       assert_match "Running /usr/bin/env rm -f .kamal/env/accessories/app-redis.env on 1.1.1.2", output
       assert_match "Running /usr/bin/env rm -f .kamal/env/accessories/app-mysql.env on 1.1.1.3", output
@@ -33,6 +27,6 @@ class CliEnvTest < CliTestCase
 
   private
     def run_command(*command)
-      stdouted { Kamal::Cli::Env.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Env.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
     end
 end

test/cli/healthcheck_test.rb

@@ -1,72 +0,0 @@
-require_relative "cli_test_case"
-
-class CliHealthcheckTest < CliTestCase
-  test "perform" do
-    # Prevent expected failures from outputting to terminal
-    Thread.report_on_exception = false
-
-    Kamal::Utils::HealthcheckPoller.stubs(:sleep) # No sleeping when retrying
-    Kamal::Configuration.any_instance.stubs(:run_id).returns("12345678901234567890123456789012")
-
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :stop, raise_on_non_zero_exit: false)
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with(:docker, :run, "--detach", "--name", "healthcheck-app-999", "--publish", "3999:3000", "--label", "service=healthcheck-app", "-e", "KAMAL_CONTAINER_NAME=\"healthcheck-app\"", "--env-file", ".kamal/env/roles/app-web.env", "--health-cmd", "\"curl -f http://localhost:3000/up || exit 1\"", "--health-interval", "\"1s\"", "dhh/app:999")
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :container, :rm, raise_on_non_zero_exit: false)
-
-    # Fail twice to test retry logic
-    SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-      .returns("starting")
-      .then
-      .returns("unhealthy")
-      .then
-      .returns("healthy")
-
-    run_command("perform").tap do |output|
-      assert_match "container not ready (starting), retrying in 1s (attempt 1/7)...", output
-      assert_match "container not ready (unhealthy), retrying in 2s (attempt 2/7)...", output
-      assert_match "Container is healthy!", output
-    end
-  end
-
-  test "perform failing to become healthy" do
-    # Prevent expected failures from outputting to terminal
-    Thread.report_on_exception = false
-
-    Kamal::Utils::HealthcheckPoller.stubs(:sleep) # No sleeping when retrying
-
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :stop, raise_on_non_zero_exit: false)
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with(:docker, :run, "--detach", "--name", "healthcheck-app-999", "--publish", "3999:3000", "--label", "service=healthcheck-app", "-e", "KAMAL_CONTAINER_NAME=\"healthcheck-app\"", "--env-file", ".kamal/env/roles/app-web.env", "--health-cmd", "\"curl -f http://localhost:3000/up || exit 1\"", "--health-interval", "\"1s\"", "dhh/app:999")
-    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :container, :rm, raise_on_non_zero_exit: false)
-
-    # Continually report unhealthy
-    SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-      .returns("unhealthy")
-
-    # Capture logs when failing
-    SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :logs, "--tail", 50, "2>&1")
-      .returns("some log output")
-
-    # Capture container health log when failing
-    SSHKit::Backend::Abstract.any_instance.stubs(:capture_with_pretty_json)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^healthcheck-app-999$", "--quiet", "|", :xargs, :docker, :inspect, "--format",  "'{{json .State.Health}}'")
-      .returns('{"Status":"unhealthy","Log":[{"ExitCode": 1,"Output": "/bin/sh: 1: curl: not found\n"}]}"')
-
-    exception = assert_raises do
-      run_command("perform")
-    end
-    assert_match "container not ready (unhealthy)", exception.message
-  end
-
-  private
-    def run_command(*command)
-      stdouted { Kamal::Cli::Healthcheck.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
-    end
-end

test/cli/lock_test.rb

@@ -3,7 +3,7 @@ require_relative "cli_test_case"
 class CliLockTest < CliTestCase
   test "status" do
     run_command("status").tap do |output|
-      assert_match "Running /usr/bin/env stat .kamal/lock-app > /dev/null && cat .kamal/lock-app/details | base64 -d on 1.1.1.1", output
+      assert_match "Running /usr/bin/env stat .kamal/locks/app > /dev/null && cat .kamal/locks/app/details | base64 -d on 1.1.1.1", output
     end
   end
 
@@ -15,6 +15,6 @@ class CliLockTest < CliTestCase
 
   private
     def run_command(*command)
-      stdouted { Kamal::Cli::Lock.start([*command, "-v", "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Lock.start([ *command, "-v", "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
     end
 end

test/cli/main_test.rb

@@ -2,37 +2,69 @@ require_relative "cli_test_case"
 
 class CliMainTest < CliTestCase
   test "setup" do
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:server:bootstrap")
+    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false }
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:accessory:boot", [ "all" ])
+
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:server:bootstrap", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:main:envify", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:accessory:boot", [ "all" ], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:deploy)
 
-    run_command("setup")
+    run_command("setup").tap do |output|
+      assert_match /Ensure Docker is installed.../, output
+      assert_match /Evaluate and push env files.../, output
+    end
+  end
+
+  test "setup with skip_push" do
+    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false }
+
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:server:bootstrap", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:main:envify", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:accessory:boot", [ "all" ], invoke_options)
+    # deploy
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:registry:login", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:pull", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:proxy:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:prune:all", [], invoke_options)
+
+    run_command("setup", "--skip_push").tap do |output|
+      assert_match /Ensure Docker is installed.../, output
+      assert_match /Evaluate and push env files.../, output
+      # deploy
+      assert_match /Acquiring the deploy lock/, output
+      assert_match /Log into image registry/, output
+      assert_match /Pull app image/, output
+      assert_match /Ensure proxy is running/, output
+      assert_match /Detect stale containers/, output
+      assert_match /Prune old containers and images/, output
+      assert_match /Releasing the deploy lock/, output
+    end
   end
 
   test "deploy" do
-    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false }
+    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false, "verbose" => true }
 
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:registry:login", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:deliver", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:traefik:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:proxy:boot", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:healthcheck:perform", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:prune:all", [], invoke_options)
 
     Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
     hook_variables = { version: 999, service_version: "app@999", hosts: "1.1.1.1,1.1.1.2", command: "deploy" }
 
-    run_command("deploy").tap do |output|
+    run_command("deploy", "--verbose").tap do |output|
       assert_hook_ran "pre-connect", output, **hook_variables
       assert_match /Log into image registry/, output
       assert_match /Build and push app image/, output
       assert_hook_ran "pre-deploy", output, **hook_variables
-      assert_match /Ensure Traefik is running/, output
+      assert_match /Ensure proxy is running/, output
-      assert_match /Ensure app can pass healthcheck/, output
       assert_match /Detect stale containers/, output
       assert_match /Prune old containers and images/, output
-      assert_hook_ran "post-deploy", output, **hook_variables, runtime: 0
+      assert_hook_ran "post-deploy", output, **hook_variables, runtime: true
     end
   end
 
@@ -41,9 +73,8 @@ class CliMainTest < CliTestCase
 
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:registry:login", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:pull", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:traefik:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:proxy:boot", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:healthcheck:perform", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:prune:all", [], invoke_options)
 
@@ -51,8 +82,7 @@ class CliMainTest < CliTestCase
       assert_match /Acquiring the deploy lock/, output
       assert_match /Log into image registry/, output
       assert_match /Pull app image/, output
-      assert_match /Ensure Traefik is running/, output
+      assert_match /Ensure proxy is running/, output
-      assert_match /Ensure app can pass healthcheck/, output
       assert_match /Detect stale containers/, output
       assert_match /Prune old containers and images/, output
       assert_match /Releasing the deploy lock/, output
@@ -62,15 +92,29 @@ class CliMainTest < CliTestCase
   test "deploy when locked" do
     Thread.report_on_exception = false
 
+    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+    Dir.stubs(:chdir)
+
     SSHKit::Backend::Abstract.any_instance.stubs(:execute)
       .with { |*args| args == [ :mkdir, "-p", ".kamal" ] }
 
     SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with { |*arg| arg[0..1] == [:mkdir, ".kamal/lock-app"] }
+      .with { |*args| args == [ :mkdir, "-p", ".kamal/locks" ] }
-      .raises(RuntimeError, "mkdir: cannot create directory ‘kamal_lock-app’: File exists")
+
+    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+      .with { |*arg| arg[0..1] == [ :mkdir, ".kamal/locks/app" ] }
+      .raises(RuntimeError, "mkdir: cannot create directory ‘kamal/locks/app’: File exists")
 
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_debug)
-      .with(:stat, ".kamal/lock-app", ">", "/dev/null", "&&", :cat, ".kamal/lock-app/details", "|", :base64, "-d")
+      .with(:stat, ".kamal/locks/app", ">", "/dev/null", "&&", :cat, ".kamal/locks/app/details", "|", :base64, "-d")
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:git, "-C", anything, :"rev-parse", :HEAD)
+      .returns(Kamal::Git.revision)
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:git, "-C", anything, :status, "--porcelain")
+      .returns("")
 
     assert_raises(Kamal::Cli::LockError) do
       run_command("deploy")
@@ -80,13 +124,27 @@ class CliMainTest < CliTestCase
   test "deploy error when locking" do
     Thread.report_on_exception = false
 
+    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+    Dir.stubs(:chdir)
+
     SSHKit::Backend::Abstract.any_instance.stubs(:execute)
       .with { |*args| args == [ :mkdir, "-p", ".kamal" ] }
 
     SSHKit::Backend::Abstract.any_instance.stubs(:execute)
-      .with { |*arg| arg[0..1] == [:mkdir, ".kamal/lock-app"] }
+      .with { |*args| args == [ :mkdir, "-p", ".kamal/locks" ] }
+
+    SSHKit::Backend::Abstract.any_instance.stubs(:execute)
+      .with { |*arg| arg[0..1] == [ :mkdir, ".kamal/locks/app" ] }
       .raises(SocketError, "getaddrinfo: nodename nor servname provided, or not known")
 
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:git, "-C", anything, :"rev-parse", :HEAD)
+      .returns(Kamal::Git.revision)
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:git, "-C", anything, :status, "--porcelain")
+      .returns("")
+
     assert_raises(SSHKit::Runner::ExecuteError) do
       run_command("deploy")
     end
@@ -99,11 +157,11 @@ class CliMainTest < CliTestCase
       .with("kamal:cli:registry:login", [], invoke_options)
       .raises(RuntimeError)
 
-    assert !KAMAL.holding_lock?
+    assert_not KAMAL.holding_lock?
     assert_raises(RuntimeError) do
       stderred { run_command("deploy") }
     end
-    assert !KAMAL.holding_lock?
+    assert_not KAMAL.holding_lock?
   end
 
   test "deploy with skipped hooks" do
@@ -111,42 +169,46 @@ class CliMainTest < CliTestCase
 
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:registry:login", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:deliver", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:traefik:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:proxy:boot", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:healthcheck:perform", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:prune:all", [], invoke_options)
 
     run_command("deploy", "--skip_hooks") do
-      refute_match /Running the post-deploy hook.../, output
+      assert_no_match /Running the post-deploy hook.../, output
     end
   end
 
   test "deploy with missing secrets" do
-    assert_raises(KeyError) do
+    invoke_options = { "config_file" => "test/fixtures/deploy_with_secrets.yml", "version" => "999", "skip_hooks" => false }
-      run_command("deploy", config_file: "deploy_with_secrets")
+
-    end
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:registry:login", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:deliver", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:proxy:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:prune:all", [], invoke_options)
+
+    run_command("deploy", config_file: "deploy_with_secrets")
   end
 
   test "redeploy" do
-    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false }
+    invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false, "verbose" => true }
 
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:deliver", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:healthcheck:perform", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
 
     Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
 
     hook_variables = { version: 999, service_version: "app@999", hosts: "1.1.1.1,1.1.1.2", command: "redeploy" }
 
-    run_command("redeploy").tap do |output|
+    run_command("redeploy", "--verbose").tap do |output|
       assert_hook_ran "pre-connect", output, **hook_variables
       assert_match /Build and push app image/, output
       assert_hook_ran "pre-deploy", output, **hook_variables
       assert_match /Running the pre-deploy hook.../, output
-      assert_match /Ensure app can pass healthcheck/, output
+      assert_hook_ran "post-deploy", output, **hook_variables, runtime: true
-      assert_hook_ran "post-deploy", output, **hook_variables, runtime: "0"
     end
   end
 
@@ -154,13 +216,11 @@ class CliMainTest < CliTestCase
     invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false }
 
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:build:pull", [], invoke_options)
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:healthcheck:perform", [], invoke_options)
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options.merge(stop: true))
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:stale_containers", [], invoke_options)
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:boot", [], invoke_options)
 
     run_command("redeploy", "--skip_push").tap do |output|
       assert_match /Pull app image/, output
-      assert_match /Ensure app can pass healthcheck/, output
     end
   end
 
@@ -176,7 +236,6 @@ class CliMainTest < CliTestCase
   end
 
   test "rollback good version" do
-    Object.any_instance.stubs(:sleep)
     [ "web", "workers" ].each do |role|
       SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
         .with(:docker, :container, :ls, "--all", "--filter", "name=^app-#{role}-123$", "--quiet", raise_on_non_zero_exit: false)
@@ -185,47 +244,38 @@ class CliMainTest < CliTestCase
         .with(:docker, :container, :ls, "--all", "--filter", "name=^app-#{role}-123$", "--quiet")
         .returns("version-to-rollback\n").at_least_once
       SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-        .with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=#{role}", "--filter", "status=running", "--filter", "status=restarting", "--latest", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-#{role}-}; done", raise_on_non_zero_exit: false)
+        .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=#{role} --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=#{role} --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-#{role}-}; done", raise_on_non_zero_exit: false)
         .returns("version-to-rollback\n").at_least_once
-      SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-        .with(:docker, :container, :ls, "--all", "--filter", "name=^app-#{role}-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-        .returns("running").at_least_once # health check
     end
 
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :inspect, "-f '{{ range .Mounts }}{{ .Source }} {{ .Destination }} {{ end }}'", "app-web-version-to-rollback", "|", :awk, "'$2 == \"/tmp/kamal-cord\" {print $1}'", :raise_on_non_zero_exit => false)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
-      .returns("corddirectory").at_least_once # health check
+      .returns("172.1.0.2:80").at_least_once
-
-    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-version-to-rollback$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
-      .returns("unhealthy").at_least_once # health check
 
     Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
     hook_variables = { version: 123, service_version: "app@123", hosts: "1.1.1.1,1.1.1.2,1.1.1.3,1.1.1.4", command: "rollback" }
 
-    run_command("rollback", "123", config_file: "deploy_with_accessories").tap do |output|
+    run_command("rollback", "--verbose", "123", config_file: "deploy_with_accessories").tap do |output|
       assert_hook_ran "pre-deploy", output, **hook_variables
       assert_match "docker tag dhh/app:123 dhh/app:latest", output
       assert_match "docker run --detach --restart unless-stopped --name app-web-123", output
       assert_match "docker container ls --all --filter name=^app-web-version-to-rollback$ --quiet | xargs docker stop", output, "Should stop the container that was previously running"
-      assert_hook_ran "post-deploy", output, **hook_variables, runtime: "0"
+      assert_hook_ran "post-deploy", output, **hook_variables, runtime: true
     end
   end
 
   test "rollback without old version" do
     Kamal::Cli::Main.any_instance.stubs(:container_available?).returns(true)
 
-    Kamal::Utils::HealthcheckPoller.stubs(:sleep)
-
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
       .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", raise_on_non_zero_exit: false)
       .returns("").at_least_once
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :ps, "--filter", "label=service=app", "--filter", "label=role=web", "--filter", "status=running", "--filter", "status=restarting", "--latest", "--format", "\"{{.Names}}\"", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
+      .with(:sh, "-c", "'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'", "|", :head, "-1", "|", "while read line; do echo ${line#app-web-}; done", raise_on_non_zero_exit: false)
       .returns("").at_least_once
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'")
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
-      .returns("running").at_least_once # health check
+      .returns("127.1.0.4:80").at_least_once
 
     run_command("rollback", "123").tap do |output|
       assert_match "docker run --detach --restart unless-stopped --name app-web-123", output
@@ -234,7 +284,7 @@ class CliMainTest < CliTestCase
   end
 
   test "details" do
-    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:traefik:details")
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:proxy:details")
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:app:details")
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:accessory:details", [ "all" ])
 
@@ -252,8 +302,8 @@ class CliMainTest < CliTestCase
     run_command("config", config_file: "deploy_simple").tap do |output|
       config = YAML.load(output)
 
-      assert_equal ["web"], config[:roles]
+      assert_equal [ "web" ], config[:roles]
-      assert_equal ["1.1.1.1", "1.1.1.2"], config[:hosts]
+      assert_equal [ "1.1.1.1", "1.1.1.2" ], config[:hosts]
       assert_equal "999", config[:version]
       assert_equal "dhh/app", config[:repository]
       assert_equal "dhh/app:999", config[:absolute_image]
@@ -265,8 +315,8 @@ class CliMainTest < CliTestCase
     run_command("config", config_file: "deploy_with_roles").tap do |output|
       config = YAML.load(output)
 
-      assert_equal ["web", "workers"], config[:roles]
+      assert_equal [ "web", "workers" ], config[:roles]
-      assert_equal ["1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4"], config[:hosts]
+      assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4" ], config[:hosts]
       assert_equal "999", config[:version]
       assert_equal "registry.digitalocean.com/dhh/app", config[:repository]
       assert_equal "registry.digitalocean.com/dhh/app:999", config[:absolute_image]
@@ -274,12 +324,35 @@ class CliMainTest < CliTestCase
     end
   end
 
+  test "config with primary web role override" do
+    run_command("config", config_file: "deploy_primary_web_role_override").tap do |output|
+      config = YAML.load(output)
+
+      assert_equal [ "web_chicago", "web_tokyo" ], config[:roles]
+      assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4" ], config[:hosts]
+      assert_equal "1.1.1.3", config[:primary_host]
+    end
+  end
+
   test "config with destination" do
     run_command("config", "-d", "world", config_file: "deploy_for_dest").tap do |output|
       config = YAML.load(output)
 
-      assert_equal ["web"], config[:roles]
+      assert_equal [ "web" ], config[:roles]
-      assert_equal ["1.1.1.1", "1.1.1.2"], config[:hosts]
+      assert_equal [ "1.1.1.1", "1.1.1.2" ], config[:hosts]
+      assert_equal "999", config[:version]
+      assert_equal "registry.digitalocean.com/dhh/app", config[:repository]
+      assert_equal "registry.digitalocean.com/dhh/app:999", config[:absolute_image]
+      assert_equal "app-999", config[:service_with_version]
+    end
+  end
+
+  test "config with aliases" do
+    run_command("config", config_file: "deploy_with_aliases").tap do |output|
+      config = YAML.load(output)
+
+      assert_equal [ "web", "web_tokyo", "workers", "workers_tokyo" ], config[:roles]
+      assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4" ], config[:hosts]
       assert_equal "999", config[:version]
       assert_equal "registry.digitalocean.com/dhh/app", config[:repository]
       assert_equal "registry.digitalocean.com/dhh/app:999", config[:absolute_image]
@@ -339,24 +412,50 @@ class CliMainTest < CliTestCase
   end
 
   test "envify" do
+    Pathname.any_instance.expects(:exist?).returns(true).times(3)
     File.expects(:read).with(".env.erb").returns("HELLO=<%= 'world' %>")
     File.expects(:write).with(".env", "HELLO=world", perm: 0600)
 
     run_command("envify")
   end
 
+  test "envify with blank line trimming" do
+    file = <<~EOF
+      HELLO=<%= 'world' %>
+      <% if true -%>
+      KEY=value
+      <% end  -%>
+    EOF
+
+    Pathname.any_instance.expects(:exist?).returns(true).times(3)
+    File.expects(:read).with(".env.erb").returns(file.strip)
+    File.expects(:write).with(".env", "HELLO=world\nKEY=value\n", perm: 0600)
+
+    run_command("envify")
+  end
+
   test "envify with destination" do
+    Pathname.any_instance.expects(:exist?).returns(true).times(4)
     File.expects(:read).with(".env.world.erb").returns("HELLO=<%= 'world' %>")
     File.expects(:write).with(".env.world", "HELLO=world", perm: 0600)
 
     run_command("envify", "-d", "world", config_file: "deploy_for_dest")
   end
 
+  test "envify with skip_push" do
+    Pathname.any_instance.expects(:exist?).returns(true).times(1)
+    File.expects(:read).with(".env.erb").returns("HELLO=<%= 'world' %>")
+    File.expects(:write).with(".env", "HELLO=world", perm: 0600)
+
+    Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:env:push").never
+    run_command("envify", "--skip-push")
+  end
+
   test "remove with confirmation" do
     run_command("remove", "-y", config_file: "deploy_with_accessories").tap do |output|
-      assert_match /docker container stop traefik/, output
+      assert_match /docker container stop kamal-proxy/, output
-      assert_match /docker container prune --force --filter label=org.opencontainers.image.title=Traefik/, output
+      assert_match /docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy/, output
-      assert_match /docker image prune --all --force --filter label=org.opencontainers.image.title=Traefik/, output
+      assert_match /docker image prune --all --force --filter label=org.opencontainers.image.title=kamal-proxy/, output
 
       assert_match /docker ps --quiet --filter label=service=app | xargs docker stop/, output
       assert_match /docker container prune --force --filter label=service=app/, output
@@ -383,6 +482,6 @@ class CliMainTest < CliTestCase
 
   private
     def run_command(*command, config_file: "deploy_simple")
-      stdouted { Kamal::Cli::Main.start([*command, "-c", "test/fixtures/#{config_file}.yml"]) }
+      stdouted { Kamal::Cli::Main.start([ *command, "-c", "test/fixtures/#{config_file}.yml" ]) }
     end
 end

test/cli/proxy_test.rb

@@ -0,0 +1,116 @@
+require_relative "cli_test_case"
+
+class CliProxyTest < CliTestCase
+  test "boot" do
+    run_command("boot").tap do |output|
+      assert_match "docker login", output
+      assert_match "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-opt max-size=\"10m\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}", output
+    end
+  end
+
+  test "reboot" do
+    Kamal::Commands::Registry.any_instance.expects(:login).twice
+
+    run_command("reboot", "-y").tap do |output|
+      assert_match "docker container stop kamal-proxy", output
+      assert_match "docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy", output
+      assert_match "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-opt max-size=\"10m\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}", output
+    end
+  end
+
+  test "reboot --rolling" do
+    run_command("reboot", "--rolling", "-y").tap do |output|
+      assert_match "Running docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy on 1.1.1.1", output
+    end
+  end
+
+  test "start" do
+    run_command("start").tap do |output|
+      assert_match "docker container start kamal-proxy", output
+    end
+  end
+
+  test "stop" do
+    run_command("stop").tap do |output|
+      assert_match "docker container stop kamal-proxy", output
+    end
+  end
+
+  test "restart" do
+    Kamal::Cli::Proxy.any_instance.expects(:stop)
+    Kamal::Cli::Proxy.any_instance.expects(:start)
+
+    run_command("restart")
+  end
+
+  test "details" do
+    run_command("details").tap do |output|
+      assert_match "docker ps --filter name=^kamal-proxy$", output
+    end
+  end
+
+  test "logs" do
+    SSHKit::Backend::Abstract.any_instance.stubs(:capture)
+      .with(:docker, :logs, "kamal-proxy", " --tail 100", "--timestamps", "2>&1")
+      .returns("Log entry")
+
+    run_command("logs").tap do |output|
+      assert_match "Proxy Host: 1.1.1.1", output
+      assert_match "Log entry", output
+    end
+  end
+
+  test "logs with follow" do
+    SSHKit::Backend::Abstract.any_instance.stubs(:exec)
+      .with("ssh -t root@1.1.1.1 -p 22 'docker logs kamal-proxy --timestamps --tail 10 --follow 2>&1'")
+
+    assert_match "docker logs kamal-proxy --timestamps --tail 10 --follow", run_command("logs", "--follow")
+  end
+
+  test "remove" do
+    Kamal::Cli::Proxy.any_instance.expects(:stop)
+    Kamal::Cli::Proxy.any_instance.expects(:remove_container)
+    Kamal::Cli::Proxy.any_instance.expects(:remove_image)
+
+    run_command("remove")
+  end
+
+  test "remove_container" do
+    run_command("remove_container").tap do |output|
+      assert_match "docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy", output
+    end
+  end
+
+  test "remove_image" do
+    run_command("remove_image").tap do |output|
+      assert_match "docker image prune --all --force --filter label=org.opencontainers.image.title=kamal-proxy", output
+    end
+  end
+
+  test "update" do
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :container, :ls, "--all", "--filter", "name=^app-web-123$", "--quiet", "|", :xargs, :docker, :inspect, "--format", "'{{.NetworkSettings.IPAddress}}{{range $k, $v := .NetworkSettings.Ports}}{{printf \":%s\" $k}}{{break}}{{end}}'", "|", :sed, "-e", "'s/\\/tcp$//'")
+      .returns("172.1.0.2:80")
+      .at_least_once
+
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with { |*args| args[0..1] == [ :sh, "-c" ] }
+      .returns("123")
+      .at_least_once
+
+    run_command("update", "-y").tap do |output|
+      assert_match "docker container stop traefik", output
+      assert_match "docker container prune --force --filter label=org.opencontainers.image.title=traefik", output
+      assert_match "docker image prune --all --force --filter label=org.opencontainers.image.title=traefik", output
+      assert_match "docker container stop kamal-proxy", output
+      assert_match "docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy", output
+      assert_match "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-opt max-size=\"10m\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}", output
+      assert_match "docker exec kamal-proxy kamal-proxy deploy app-web --target \"172.1.0.2:80\"", output
+    end
+  end
+
+  private
+    def run_command(*command)
+      stdouted { Kamal::Cli::Proxy.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
+    end
+end

test/cli/prune_test.rb

@@ -10,7 +10,7 @@ class CliPruneTest < CliTestCase
 
   test "images" do
     run_command("images").tap do |output|
-      assert_match "docker image prune --force --filter label=service=app --filter dangling=true on 1.1.1.", output
+      assert_match "docker image prune --force --filter label=service=app on 1.1.1.", output
       assert_match "docker image ls --filter label=service=app --format '{{.ID}} {{.Repository}}:{{.Tag}}' | grep -v -w \"$(docker container ls -a --format '{{.Image}}\\|' --filter label=service=app | tr -d '\\n')dhh/app:latest\\|dhh/app:<none>\" | while read image tag; do docker rmi $tag; done on 1.1.1.", output
     end
   end
@@ -18,11 +18,19 @@ class CliPruneTest < CliTestCase
   test "containers" do
     run_command("containers").tap do |output|
       assert_match /docker ps -q -a --filter label=service=app --filter status=created --filter status=exited --filter status=dead | tail -n +6 | while read container_id; do docker rm $container_id; done on 1.1.1.\d/, output
+     end
+
+    run_command("containers", "--retain", "10").tap do |output|
+      assert_match /docker ps -q -a --filter label=service=app --filter status=created --filter status=exited --filter status=dead | tail -n +11 | while read container_id; do docker rm $container_id; done on 1.1.1.\d/, output
+    end
+
+    assert_raises(RuntimeError, "retain must be at least 1") do
+      run_command("containers", "--retain", "0")
     end
   end
 
   private
     def run_command(*command)
-      stdouted { Kamal::Cli::Prune.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Prune.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
     end
 end

test/cli/registry_test.rb

@@ -16,6 +16,6 @@ class CliRegistryTest < CliTestCase
 
   private
     def run_command(*command)
-      stdouted { Kamal::Cli::Registry.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Registry.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
     end
 end

test/cli/server_test.rb

@@ -1,16 +1,32 @@
 require_relative "cli_test_case"
 
 class CliServerTest < CliTestCase
+  test "running a command with exec" do
+    SSHKit::Backend::Abstract.any_instance.stubs(:capture)
+    .with("date", verbosity: 1)
+    .returns("Today")
+
+    hosts = "1.1.1.1".."1.1.1.4"
+    run_command("exec", "date").tap do |output|
+      hosts.map do |host|
+        assert_match "Running 'date' on #{hosts.to_a.join(', ')}...", output
+        assert_match "App Host: #{host}\nToday", output
+      end
+    end
+  end
+
   test "bootstrap already installed" do
+    stub_setup
     SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:docker, "-v", raise_on_non_zero_exit: false).returns(true).at_least_once
     SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:mkdir, "-p", ".kamal").returns("").at_least_once
 
-    assert_equal "", run_command("bootstrap")
+    assert_equal "Acquiring the deploy lock...\nReleasing the deploy lock...", run_command("bootstrap")
   end
 
   test "bootstrap install as non-root user" do
+    stub_setup
     SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:docker, "-v", raise_on_non_zero_exit: false).returns(false).at_least_once
-    SSHKit::Backend::Abstract.any_instance.expects(:execute).with('[ "${EUID:-$(id -u)}" -eq 0 ]', raise_on_non_zero_exit: false).returns(false).at_least_once
+    SSHKit::Backend::Abstract.any_instance.expects(:execute).with('[ "${EUID:-$(id -u)}" -eq 0 ] || command -v sudo >/dev/null || command -v su >/dev/null', raise_on_non_zero_exit: false).returns(false).at_least_once
     SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:mkdir, "-p", ".kamal").returns("").at_least_once
 
     assert_raise RuntimeError, "Docker is not installed on 1.1.1.1, 1.1.1.3, 1.1.1.4, 1.1.1.2 and can't be automatically installed without having root access and the `curl` command available. Install Docker manually: https://docs.docker.com/engine/install/" do
@@ -19,20 +35,25 @@ class CliServerTest < CliTestCase
   end
 
   test "bootstrap install as root user" do
+    stub_setup
     SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:docker, "-v", raise_on_non_zero_exit: false).returns(false).at_least_once
-    SSHKit::Backend::Abstract.any_instance.expects(:execute).with('[ "${EUID:-$(id -u)}" -eq 0 ]', raise_on_non_zero_exit: false).returns(true).at_least_once
+    SSHKit::Backend::Abstract.any_instance.expects(:execute).with('[ "${EUID:-$(id -u)}" -eq 0 ] || command -v sudo >/dev/null || command -v su >/dev/null', raise_on_non_zero_exit: false).returns(true).at_least_once
-    SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:curl, "-fsSL", "https://get.docker.com", "|", :sh).at_least_once
+    SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:sh, "-c", "'curl -fsSL https://get.docker.com || wget -O - https://get.docker.com || echo \"exit 1\"'", "|", :sh).at_least_once
     SSHKit::Backend::Abstract.any_instance.expects(:execute).with(:mkdir, "-p", ".kamal").returns("").at_least_once
+    Kamal::Commands::Hook.any_instance.stubs(:hook_exists?).returns(true)
+    SSHKit::Backend::Abstract.any_instance.expects(:execute).with(".kamal/hooks/pre-connect", anything).at_least_once
+    SSHKit::Backend::Abstract.any_instance.expects(:execute).with(".kamal/hooks/docker-setup", anything).at_least_once
 
     run_command("bootstrap").tap do |output|
       ("1.1.1.1".."1.1.1.4").map do |host|
         assert_match "Missing Docker on #{host}. Installing…", output
+        assert_match "Running the docker-setup hook", output
       end
     end
   end
 
   private
     def run_command(*command)
-      stdouted { Kamal::Cli::Server.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+      stdouted { Kamal::Cli::Server.start([ *command, "-c", "test/fixtures/deploy_with_accessories.yml" ]) }
     end
 end

test/cli/traefik_test.rb

@@ -1,96 +0,0 @@
-require_relative "cli_test_case"
-
-class CliTraefikTest < CliTestCase
-  test "boot" do
-    run_command("boot").tap do |output|
-      assert_match "docker login", output
-      assert_match "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{Kamal::Commands::Traefik::DEFAULT_IMAGE} --providers.docker --log.level=\"DEBUG\"", output
-    end
-  end
-
-  test "reboot" do
-    Kamal::Commands::Registry.any_instance.expects(:login).twice
-
-    run_command("reboot").tap do |output|
-      assert_match "docker container stop traefik", output
-      assert_match "docker container prune --force --filter label=org.opencontainers.image.title=Traefik", output
-      assert_match "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{Kamal::Commands::Traefik::DEFAULT_IMAGE} --providers.docker --log.level=\"DEBUG\"", output
-    end
-  end
-
-  test "reboot --rolling" do
-    Object.any_instance.stubs(:sleep)
-
-    run_command("reboot", "--rolling").tap do |output|
-      assert_match "Running docker container prune --force --filter label=org.opencontainers.image.title=Traefik on 1.1.1.1", output
-    end
-  end
-
-  test "start" do
-    run_command("start").tap do |output|
-      assert_match "docker container start traefik", output
-    end
-  end
-
-  test "stop" do
-    run_command("stop").tap do |output|
-      assert_match "docker container stop traefik", output
-    end
-  end
-
-  test "restart" do
-    Kamal::Cli::Traefik.any_instance.expects(:stop)
-    Kamal::Cli::Traefik.any_instance.expects(:start)
-
-    run_command("restart")
-  end
-
-  test "details" do
-    run_command("details").tap do |output|
-      assert_match "docker ps --filter name=^traefik$", output
-    end
-  end
-
-  test "logs" do
-    SSHKit::Backend::Abstract.any_instance.stubs(:capture)
-      .with(:docker, :logs, "traefik", " --tail 100", "--timestamps", "2>&1")
-      .returns("Log entry")
-
-    run_command("logs").tap do |output|
-      assert_match "Traefik Host: 1.1.1.1", output
-      assert_match "Log entry", output
-    end
-  end
-
-  test "logs with follow" do
-    SSHKit::Backend::Abstract.any_instance.stubs(:exec)
-      .with("ssh -t root@1.1.1.1 'docker logs traefik --timestamps --tail 10 --follow 2>&1'")
-
-    assert_match "docker logs traefik --timestamps --tail 10 --follow", run_command("logs", "--follow")
-  end
-
-  test "remove" do
-    Kamal::Cli::Traefik.any_instance.expects(:stop)
-    Kamal::Cli::Traefik.any_instance.expects(:remove_container)
-    Kamal::Cli::Traefik.any_instance.expects(:remove_image)
-
-    run_command("remove")
-  end
-
-  test "remove_container" do
-    run_command("remove_container").tap do |output|
-      assert_match "docker container prune --force --filter label=org.opencontainers.image.title=Traefik", output
-    end
-  end
-
-  test "remove_image" do
-    run_command("remove_image").tap do |output|
-      assert_match "docker image prune --all --force --filter label=org.opencontainers.image.title=Traefik", output
-    end
-  end
-
-  private
-    def run_command(*command)
-      stdouted { Kamal::Cli::Traefik.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
-    end
-end

test/commander_test.rb

@@ -14,6 +14,23 @@ class CommanderTest < ActiveSupport::TestCase
 
     @kamal.specific_hosts = [ "1.1.1.1", "1.1.1.2" ]
     assert_equal [ "1.1.1.1", "1.1.1.2" ], @kamal.hosts
+
+    @kamal.specific_hosts = [ "1.1.1.1*" ]
+    assert_equal [ "1.1.1.1" ], @kamal.hosts
+
+    @kamal.specific_hosts = [ "1.1.1.*", "*.1.2.*" ]
+    assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4" ], @kamal.hosts
+
+    @kamal.specific_hosts = [ "*" ]
+    assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4" ], @kamal.hosts
+
+    @kamal.specific_hosts = [ "1.1.1.[12]" ]
+    assert_equal [ "1.1.1.1", "1.1.1.2" ], @kamal.hosts
+
+    exception = assert_raises(ArgumentError) do
+      @kamal.specific_hosts = [ "*miss" ]
+    end
+    assert_match /hosts match for \*miss/, exception.message
   end
 
   test "filtering hosts by filtering roles" do
@@ -21,6 +38,11 @@ class CommanderTest < ActiveSupport::TestCase
 
     @kamal.specific_roles = [ "web" ]
     assert_equal [ "1.1.1.1", "1.1.1.2" ], @kamal.hosts
+
+    exception = assert_raises(ArgumentError) do
+      @kamal.specific_roles = [ "*miss" ]
+    end
+    assert_match /roles match for \*miss/, exception.message
   end
 
   test "filtering roles" do
@@ -28,6 +50,23 @@ class CommanderTest < ActiveSupport::TestCase
 
     @kamal.specific_roles = [ "workers" ]
     assert_equal [ "workers" ], @kamal.roles.map(&:name)
+
+    @kamal.specific_roles = [ "w*" ]
+    assert_equal [ "web", "workers" ], @kamal.roles.map(&:name)
+
+    @kamal.specific_roles = [ "we*", "*orkers" ]
+    assert_equal [ "web", "workers" ], @kamal.roles.map(&:name)
+
+    @kamal.specific_roles = [ "*" ]
+    assert_equal [ "web", "workers" ], @kamal.roles.map(&:name)
+
+    @kamal.specific_roles = [ "w{eb,orkers}" ]
+    assert_equal [ "web", "workers" ], @kamal.roles.map(&:name)
+
+    exception = assert_raises(ArgumentError) do
+      @kamal.specific_roles = [ "*miss" ]
+    end
+    assert_match /roles match for \*miss/, exception.message
   end
 
   test "filtering roles by filtering hosts" do
@@ -49,9 +88,20 @@ class CommanderTest < ActiveSupport::TestCase
     assert_equal "1.1.1.3", @kamal.primary_host
   end
 
+  test "primary_role" do
+    assert_equal "web", @kamal.primary_role.name
+    @kamal.specific_roles = "workers"
+    assert_equal "workers", @kamal.primary_role.name
+  end
+
   test "roles_on" do
-    assert_equal [ "web" ], @kamal.roles_on("1.1.1.1")
+    assert_equal [ "web" ], @kamal.roles_on("1.1.1.1").map(&:name)
-    assert_equal [ "workers" ], @kamal.roles_on("1.1.1.3")
+    assert_equal [ "workers" ], @kamal.roles_on("1.1.1.3").map(&:name)
+  end
+
+  test "roles_on web comes first" do
+    configure_with(:deploy_with_two_roles_one_host)
+    assert_equal [ "web", "workers" ], @kamal.roles_on("1.1.1.1").map(&:name)
   end
 
   test "default group strategy" do
@@ -70,6 +120,36 @@ class CommanderTest < ActiveSupport::TestCase
     assert_equal({ in: :groups, limit: 1, wait: 2 }, @kamal.boot_strategy)
   end
 
+  test "percentage-based group strategy limit is at least 1" do
+    configure_with(:deploy_with_low_percentage_boot_strategy)
+
+    assert_equal({ in: :groups, limit: 1, wait: 2 }, @kamal.boot_strategy)
+  end
+
+  test "try to match the primary role from a list of specific roles" do
+    configure_with(:deploy_primary_web_role_override)
+
+    @kamal.specific_roles = [ "web_*" ]
+    assert_equal [ "web_tokyo", "web_chicago" ], @kamal.roles.map(&:name)
+    assert_equal "web_tokyo", @kamal.primary_role.name
+    assert_equal "1.1.1.3", @kamal.primary_host
+    assert_equal [ "1.1.1.3", "1.1.1.4", "1.1.1.1", "1.1.1.2" ], @kamal.hosts
+  end
+
+  test "proxy hosts should observe filtered roles" do
+    configure_with(:deploy_with_aliases)
+
+    @kamal.specific_roles = [ "web_tokyo" ]
+    assert_equal [ "1.1.1.3", "1.1.1.4" ], @kamal.proxy_hosts
+  end
+
+  test "proxy hosts should observe filtered hosts" do
+    configure_with(:deploy_with_aliases)
+
+    @kamal.specific_hosts = [ "1.1.1.4" ]
+    assert_equal [ "1.1.1.4" ], @kamal.proxy_hosts
+  end
+
   private
     def configure_with(variant)
       @kamal = Kamal::Commander.new.tap do |kamal|

test/commands/accessory_test.rb

@@ -34,6 +34,7 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
           ]
         },
         "busybox" => {
+          "service" => "custom-busybox",
           "image" => "busybox:latest",
           "host" => "1.1.1.7"
         }
@@ -49,15 +50,15 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
 
   test "run" do
     assert_equal \
-      "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --label service=\"app-mysql\" private.registry/mysql:8.0",
+      "docker run --name app-mysql --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 3306:3306 --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" --label service=\"app-mysql\" private.registry/mysql:8.0",
       new_command(:mysql).run.join(" ")
 
     assert_equal \
-      "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --volume /var/lib/redis:/data --label service=\"app-redis\" --label cache=\"true\" redis:latest",
+      "docker run --name app-redis --detach --restart unless-stopped --log-opt max-size=\"10m\" --publish 6379:6379 --env-file .kamal/env/accessories/app-redis.env --env SOMETHING=\"else\" --volume /var/lib/redis:/data --label service=\"app-redis\" --label cache=\"true\" redis:latest",
       new_command(:redis).run.join(" ")
 
     assert_equal \
-      "docker run --name app-busybox --detach --restart unless-stopped --log-opt max-size=\"10m\" --env-file .kamal/env/accessories/app-busybox.env --label service=\"app-busybox\" busybox:latest",
+      "docker run --name custom-busybox --detach --restart unless-stopped --log-opt max-size=\"10m\" --env-file .kamal/env/accessories/custom-busybox.env --label service=\"custom-busybox\" busybox:latest",
       new_command(:busybox).run.join(" ")
   end
 
@@ -65,7 +66,7 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
     @config[:logging] = { "driver" => "local", "options" => { "max-size" => "100m", "max-file" => "3" } }
 
     assert_equal \
-      "docker run --name app-busybox --detach --restart unless-stopped --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" --env-file .kamal/env/accessories/app-busybox.env --label service=\"app-busybox\" busybox:latest",
+      "docker run --name custom-busybox --detach --restart unless-stopped --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" --env-file .kamal/env/accessories/custom-busybox.env --label service=\"custom-busybox\" busybox:latest",
       new_command(:busybox).run.join(" ")
   end
 
@@ -90,7 +91,7 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
 
   test "execute in new container" do
     assert_equal \
-      "docker run --rm --env-file .kamal/env/accessories/app-mysql.env private.registry/mysql:8.0 mysql -u root",
+      "docker run --rm --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" private.registry/mysql:8.0 mysql -u root",
       new_command(:mysql).execute_in_new_container("mysql", "-u", "root").join(" ")
   end
 
@@ -102,14 +103,14 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
 
   test "execute in new container over ssh" do
     new_command(:mysql).stub(:run_over_ssh, ->(cmd) { cmd.join(" ") }) do
-      assert_match %r|docker run -it --rm --env-file .kamal/env/accessories/app-mysql.env private.registry/mysql:8.0 mysql -u root|,
+      assert_match %r{docker run -it --rm --env-file .kamal/env/accessories/app-mysql.env --env MYSQL_ROOT_HOST=\"%\" private.registry/mysql:8.0 mysql -u root},
         new_command(:mysql).execute_in_new_container_over_ssh("mysql", "-u", "root")
     end
   end
 
   test "execute in existing container over ssh" do
     new_command(:mysql).stub(:run_over_ssh, ->(cmd) { cmd.join(" ") }) do
-      assert_match %r|docker exec -it app-mysql mysql -u root|,
+      assert_match %r{docker exec -it app-mysql mysql -u root},
         new_command(:mysql).execute_in_existing_container_over_ssh("mysql", "-u", "root")
     end
   end
@@ -128,7 +129,7 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
 
   test "follow logs" do
     assert_equal \
-      "ssh -t root@1.1.1.5 'docker logs app-mysql --timestamps --tail 10 --follow 2>&1'",
+      "ssh -t root@1.1.1.5 -p 22 'docker logs app-mysql --timestamps --tail 10 --follow 2>&1'",
       new_command(:mysql).follow_logs
   end
 

test/commands/app_test.rb

@@ -14,60 +14,54 @@ class CommandsAppTest < ActiveSupport::TestCase
 
   test "run" do
     assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(curl -f http://localhost:3000/up || exit 1) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
+      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-web.env --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label destination dhh/app:999",
       new_command.run.join(" ")
   end
 
   test "run with hostname" do
     assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 --hostname myhost -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(curl -f http://localhost:3000/up || exit 1) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
+      "docker run --detach --restart unless-stopped --name app-web-999 --hostname myhost -e KAMAL_CONTAINER_NAME=\"app-web-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-web.env --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label destination dhh/app:999",
       new_command.run(hostname: "myhost").join(" ")
   end
 
   test "run with volumes" do
-    @config[:volumes] = ["/local/path:/container/path" ]
+    @config[:volumes] = [ "/local/path:/container/path" ]
 
     assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(curl -f http://localhost:3000/up || exit 1) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-opt max-size=\"10m\" --volume /local/path:/container/path --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
+      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-web.env --log-opt max-size=\"10m\" --volume /local/path:/container/path --label service=\"app\" --label role=\"web\" --label destination dhh/app:999",
-      new_command.run.join(" ")
-  end
-
-  test "run with custom healthcheck path" do
-    @config[:healthcheck] = { "path" => "/healthz" }
-
-    assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(curl -f http://localhost:3000/healthz || exit 1) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
-      new_command.run.join(" ")
-  end
-
-  test "run with custom healthcheck command" do
-    @config[:healthcheck] = { "cmd" => "/bin/up" }
-
-    assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(/bin/up) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
-      new_command.run.join(" ")
-  end
-
-  test "run with role-specific healthcheck options" do
-    @config[:servers] = { "web" => { "hosts" => [ "1.1.1.1" ], "healthcheck" => { "cmd" => "/bin/healthy" } } }
-
-    assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(/bin/healthy) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
       new_command.run.join(" ")
   end
 
   test "run with custom options" do
     @config[:servers] = { "web" => [ "1.1.1.1" ], "jobs" => { "hosts" => [ "1.1.1.2" ], "cmd" => "bin/jobs", "options" => { "mount" => "somewhere", "cap-add" => true } } }
     assert_equal \
-      "docker run --detach --restart unless-stopped --name app-jobs-999 -e KAMAL_CONTAINER_NAME=\"app-jobs-999\" --env-file .kamal/env/roles/app-jobs.env --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"jobs\" --mount \"somewhere\" --cap-add dhh/app:999 bin/jobs",
+      "docker run --detach --restart unless-stopped --name app-jobs-999 -e KAMAL_CONTAINER_NAME=\"app-jobs-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-jobs.env --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"jobs\" --label destination --mount \"somewhere\" --cap-add dhh/app:999 bin/jobs",
-      new_command(role: "jobs").run.join(" ")
+      new_command(role: "jobs", host: "1.1.1.2").run.join(" ")
   end
 
   test "run with logging config" do
     @config[:logging] = { "driver" => "local", "options" => { "max-size" => "100m", "max-file" => "3" } }
 
     assert_equal \
-      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" --env-file .kamal/env/roles/app-web.env --health-cmd \"(curl -f http://localhost:3000/up || exit 1) && (stat /tmp/kamal-cord/cord > /dev/null || exit 1)\" --health-interval \"1s\" --volume $(pwd)/.kamal/cords/app-web-12345678901234567890123456789012:/tmp/kamal-cord --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" --label service=\"app\" --label role=\"web\" --label traefik.http.services.app-web.loadbalancer.server.scheme=\"http\" --label traefik.http.routers.app-web.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.middlewares.app-web-retry.retry.attempts=\"5\" --label traefik.http.middlewares.app-web-retry.retry.initialinterval=\"500ms\" --label traefik.http.routers.app-web.middlewares=\"app-web-retry@docker\" dhh/app:999",
+      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-web.env --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" --label service=\"app\" --label role=\"web\" --label destination dhh/app:999",
+      new_command.run.join(" ")
+  end
+
+  test "run with role logging config" do
+    @config[:logging] = { "driver" => "local", "options" => { "max-size" => "10m", "max-file" => "3" } }
+    @config[:servers] = { "web" => { "hosts" => [ "1.1.1.1" ], "logging" => { "driver" => "local", "options" => { "max-size" => "100m" } } } }
+
+    assert_equal \
+      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-web.env --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" --label service=\"app\" --label role=\"web\" --label destination dhh/app:999",
+      new_command.run.join(" ")
+  end
+
+  test "run with tags" do
+    @config[:servers] = [ { "1.1.1.1" => "tag1" } ]
+    @config[:env]["tags"] = { "tag1" => { "ENV1" => "value1" } }
+
+    assert_equal \
+      "docker run --detach --restart unless-stopped --name app-web-999 -e KAMAL_CONTAINER_NAME=\"app-web-999\" -e KAMAL_VERSION=\"999\" --env-file .kamal/env/roles/app-web.env --env ENV1=\"value1\" --log-opt max-size=\"10m\" --label service=\"app\" --label role=\"web\" --label destination dhh/app:999",
       new_command.run.join(" ")
   end
 
@@ -86,14 +80,14 @@ class CommandsAppTest < ActiveSupport::TestCase
 
   test "stop" do
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker stop",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker stop",
       new_command.stop.join(" ")
   end
 
   test "stop with custom stop wait time" do
     @config[:stop_wait_time] = 30
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker stop -t 30",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker stop -t 30",
       new_command.stop.join(" ")
   end
 
@@ -119,115 +113,157 @@ class CommandsAppTest < ActiveSupport::TestCase
 
   test "logs" do
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs 2>&1",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs 2>&1",
       new_command.logs.join(" ")
 
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --since 5m 2>&1",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs --since 5m 2>&1",
       new_command.logs(since: "5m").join(" ")
 
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --tail 100 2>&1",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs --tail 100 2>&1",
       new_command.logs(lines: "100").join(" ")
 
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --since 5m --tail 100 2>&1",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs --since 5m --tail 100 2>&1",
       new_command.logs(since: "5m", lines: "100").join(" ")
 
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs 2>&1 | grep 'my-id'",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs 2>&1 | grep 'my-id'",
       new_command.logs(grep: "my-id").join(" ")
 
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --since 5m 2>&1 | grep 'my-id'",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | xargs docker logs --since 5m 2>&1 | grep 'my-id'",
       new_command.logs(since: "5m", grep: "my-id").join(" ")
   end
 
   test "follow logs" do
-    assert_match \
+    assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --timestamps --tail 10 --follow 2>&1",
+      "ssh -t root@app-1 -p 22 'sh -c '\\''docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''\\'\\'''\\''{{.ID}}'\\''\\'\\'''\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'\\'' | head -1 | xargs docker logs --timestamps --follow 2>&1'",
       new_command.follow_logs(host: "app-1")
 
-    assert_match \
+    assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest | xargs docker logs --timestamps --tail 10 --follow 2>&1 | grep \"Completed\"",
+      "ssh -t root@app-1 -p 22 'sh -c '\\''docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''\\'\\'''\\''{{.ID}}'\\''\\'\\'''\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'\\'' | head -1 | xargs docker logs --timestamps --follow 2>&1 | grep \"Completed\"'",
       new_command.follow_logs(host: "app-1", grep: "Completed")
+
+    assert_equal \
+      "ssh -t root@app-1 -p 22 'sh -c '\\''docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''\\'\\'''\\''{{.ID}}'\\''\\'\\'''\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'\\'' | head -1 | xargs docker logs --timestamps --tail 123 --follow 2>&1'",
+      new_command.follow_logs(host: "app-1", lines: 123)
+
+    assert_equal \
+      "ssh -t root@app-1 -p 22 'sh -c '\\''docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''\\'\\'''\\''{{.ID}}'\\''\\'\\'''\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting'\\'' | head -1 | xargs docker logs --timestamps --tail 123 --follow 2>&1 | grep \"Completed\"'",
+      new_command.follow_logs(host: "app-1", lines: 123, grep: "Completed")
   end
 
 
   test "execute in new container" do
     assert_equal \
       "docker run --rm --env-file .kamal/env/roles/app-web.env dhh/app:999 bin/rails db:setup",
-      new_command.execute_in_new_container("bin/rails", "db:setup").join(" ")
+      new_command.execute_in_new_container("bin/rails", "db:setup", env: {}).join(" ")
+  end
+
+  test "execute in new container with env" do
+    assert_equal \
+      "docker run --rm --env-file .kamal/env/roles/app-web.env --env foo=\"bar\" dhh/app:999 bin/rails db:setup",
+      new_command.execute_in_new_container("bin/rails", "db:setup", env: { "foo" => "bar" }).join(" ")
+  end
+
+  test "execute in new container with tags" do
+    @config[:servers] = [ { "1.1.1.1" => "tag1" } ]
+    @config[:env]["tags"] = { "tag1" => { "ENV1" => "value1" } }
+
+    assert_equal \
+      "docker run --rm --env-file .kamal/env/roles/app-web.env --env ENV1=\"value1\" dhh/app:999 bin/rails db:setup",
+      new_command.execute_in_new_container("bin/rails", "db:setup", env: {}).join(" ")
   end
 
   test "execute in new container with custom options" do
     @config[:servers] = { "web" => { "hosts" => [ "1.1.1.1" ], "options" => { "mount" => "somewhere", "cap-add" => true } } }
     assert_equal \
       "docker run --rm --env-file .kamal/env/roles/app-web.env --mount \"somewhere\" --cap-add dhh/app:999 bin/rails db:setup",
-      new_command.execute_in_new_container("bin/rails", "db:setup").join(" ")
+      new_command.execute_in_new_container("bin/rails", "db:setup", env: {}).join(" ")
   end
 
   test "execute in existing container" do
     assert_equal \
       "docker exec app-web-999 bin/rails db:setup",
-      new_command.execute_in_existing_container("bin/rails", "db:setup").join(" ")
+      new_command.execute_in_existing_container("bin/rails", "db:setup", env: {}).join(" ")
+  end
+
+  test "execute in existing container with env" do
+    assert_equal \
+      "docker exec --env foo=\"bar\" app-web-999 bin/rails db:setup",
+      new_command.execute_in_existing_container("bin/rails", "db:setup", env: { "foo" => "bar" }).join(" ")
   end
 
   test "execute in new container over ssh" do
-    assert_match %r|docker run -it --rm --env-file .kamal/env/roles/app-web.env dhh/app:999 bin/rails c|,
+    assert_match %r{docker run -it --rm --env-file .kamal/env/roles/app-web.env dhh/app:999 bin/rails c},
-      new_command.execute_in_new_container_over_ssh("bin/rails", "c", host: "app-1")
+      new_command.execute_in_new_container_over_ssh("bin/rails", "c", env: {})
+  end
+
+  test "execute in new container over ssh with tags" do
+    @config[:servers] = [ { "1.1.1.1" => "tag1" } ]
+    @config[:env]["tags"] = { "tag1" => { "ENV1" => "value1" } }
+
+    assert_equal "ssh -t root@1.1.1.1 -p 22 'docker run -it --rm --env-file .kamal/env/roles/app-web.env --env ENV1=\"value1\" dhh/app:999 bin/rails c'",
+      new_command.execute_in_new_container_over_ssh("bin/rails", "c", env: {})
   end
 
   test "execute in new container with custom options over ssh" do
     @config[:servers] = { "web" => { "hosts" => [ "1.1.1.1" ], "options" => { "mount" => "somewhere", "cap-add" => true } } }
-    assert_match %r|docker run -it --rm --env-file .kamal/env/roles/app-web.env --mount \"somewhere\" --cap-add dhh/app:999 bin/rails c|,
+    assert_match %r{docker run -it --rm --env-file .kamal/env/roles/app-web.env --mount \"somewhere\" --cap-add dhh/app:999 bin/rails c},
-      new_command.execute_in_new_container_over_ssh("bin/rails", "c", host: "app-1")
+      new_command.execute_in_new_container_over_ssh("bin/rails", "c", env: {})
   end
 
   test "execute in existing container over ssh" do
-    assert_match %r|docker exec -it app-web-999 bin/rails c|,
+    assert_match %r{docker exec -it app-web-999 bin/rails c},
-      new_command.execute_in_existing_container_over_ssh("bin/rails", "c", host: "app-1")
+      new_command.execute_in_existing_container_over_ssh("bin/rails", "c", env: {})
   end
 
   test "run over ssh" do
-    assert_equal "ssh -t root@1.1.1.1 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -t root@1.1.1.1 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
   end
 
   test "run over ssh with custom user" do
     @config[:ssh] = { "user" => "app" }
-    assert_equal "ssh -t app@1.1.1.1 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -t app@1.1.1.1 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+  end
+
+  test "run over ssh with custom port" do
+    @config[:ssh] = { "port" => "2222" }
+    assert_equal "ssh -t root@1.1.1.1 -p 2222 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
   end
 
   test "run over ssh with proxy" do
     @config[:ssh] = { "proxy" => "2.2.2.2" }
-    assert_equal "ssh -J root@2.2.2.2 -t root@1.1.1.1 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -J root@2.2.2.2 -t root@1.1.1.1 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
   end
 
   test "run over ssh with proxy user" do
     @config[:ssh] = { "proxy" => "app@2.2.2.2" }
-    assert_equal "ssh -J app@2.2.2.2 -t root@1.1.1.1 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -J app@2.2.2.2 -t root@1.1.1.1 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
   end
 
   test "run over ssh with custom user with proxy" do
     @config[:ssh] = { "user" => "app", "proxy" => "2.2.2.2" }
-    assert_equal "ssh -J root@2.2.2.2 -t app@1.1.1.1 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -J root@2.2.2.2 -t app@1.1.1.1 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
   end
 
   test "run over ssh with proxy_command" do
     @config[:ssh] = { "proxy_command" => "ssh -W %h:%p user@proxy-server" }
-    assert_equal "ssh -o ProxyCommand='ssh -W %h:%p user@proxy-server' -t root@1.1.1.1 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -o ProxyCommand='ssh -W %h:%p user@proxy-server' -t root@1.1.1.1 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
   end
 
   test "current_running_container_id" do
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest",
+    "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1",
       new_command.current_running_container_id.join(" ")
   end
 
   test "current_running_container_id with destination" do
     @destination = "staging"
     assert_equal \
-      "docker ps --quiet --filter label=service=app --filter label=destination=staging --filter label=role=web --filter status=running --filter status=restarting --latest",
+      "sh -c 'docker ps --latest --quiet --filter label=service=app --filter label=destination=staging --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest-staging --format '\\''{{.ID}}'\\'') ; docker ps --latest --quiet --filter label=service=app --filter label=destination=staging --filter label=role=web --filter status=running --filter status=restarting' | head -1",
       new_command.current_running_container_id.join(" ")
   end
 
@@ -239,7 +275,7 @@ class CommandsAppTest < ActiveSupport::TestCase
 
   test "current_running_version" do
     assert_equal \
-      "docker ps --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --latest --format \"{{.Names}}\" | while read line; do echo ${line#app-web-}; done",
+      "sh -c 'docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting --filter ancestor=$(docker image ls --filter reference=dhh/app:latest --format '\\''{{.ID}}'\\'') ; docker ps --latest --format '\\''{{.Names}}'\\'' --filter label=service=app --filter label=role=web --filter status=running --filter status=restarting' | head -1 | while read line; do echo ${line#app-web-}; done",
       new_command.current_running_version.join(" ")
   end
 
@@ -317,10 +353,17 @@ class CommandsAppTest < ActiveSupport::TestCase
       new_command.remove_images.join(" ")
   end
 
-  test "tag_current_as_latest" do
+  test "tag_latest_image" do
     assert_equal \
       "docker tag dhh/app:999 dhh/app:latest",
-      new_command.tag_current_as_latest.join(" ")
+      new_command.tag_latest_image.join(" ")
+  end
+
+  test "tag_latest_image with destination" do
+    @destination = "staging"
+    assert_equal \
+      "docker tag dhh/app:999 dhh/app:latest-staging",
+      new_command.tag_latest_image.join(" ")
   end
 
   test "make_env_directory" do
@@ -331,22 +374,40 @@ class CommandsAppTest < ActiveSupport::TestCase
     assert_equal "rm -f .kamal/env/roles/app-web.env", new_command.remove_env_file.join(" ")
   end
 
-  test "cord" do
+  test "extract assets" do
-    assert_equal "docker inspect -f '{{ range .Mounts }}{{ .Source }} {{ .Destination }} {{ end }}' app-web-123 | awk '$2 == \"/tmp/kamal-cord\" {print $1}'", new_command.cord(version: 123).join(" ")
+    assert_equal [
+      :mkdir, "-p", ".kamal/assets/extracted/app-web-999", "&&",
+      :docker, :stop, "-t 1", "app-web-assets", "2> /dev/null", "|| true", "&&",
+      :docker, :run, "--name", "app-web-assets", "--detach", "--rm", "dhh/app:999", "sleep 1000000", "&&",
+      :docker, :cp, "-L", "app-web-assets:/public/assets/.", ".kamal/assets/extracted/app-web-999", "&&",
+      :docker, :stop, "-t 1", "app-web-assets"
+    ], new_command(asset_path: "/public/assets").extract_assets
   end
 
-  test "tie cord" do
+  test "sync asset volumes" do
-    assert_equal "mkdir -p . ; touch cordfile", new_command.tie_cord("cordfile").join(" ")
+    assert_equal [
-    assert_equal "mkdir -p corddir ; touch corddir/cordfile", new_command.tie_cord("corddir/cordfile").join(" ")
+      :mkdir, "-p", ".kamal/assets/volumes/app-web-999", ";",
-    assert_equal "mkdir -p /corddir ; touch /corddir/cordfile", new_command.tie_cord("/corddir/cordfile").join(" ")
+      :cp, "-rnT", ".kamal/assets/extracted/app-web-999", ".kamal/assets/volumes/app-web-999"
+    ], new_command(asset_path: "/public/assets").sync_asset_volumes
+
+    assert_equal [
+      :mkdir, "-p", ".kamal/assets/volumes/app-web-999", ";",
+      :cp, "-rnT", ".kamal/assets/extracted/app-web-999", ".kamal/assets/volumes/app-web-999", ";",
+      :cp, "-rnT", ".kamal/assets/extracted/app-web-999", ".kamal/assets/volumes/app-web-998", "|| true", ";",
+      :cp, "-rnT", ".kamal/assets/extracted/app-web-998", ".kamal/assets/volumes/app-web-999", "|| true"
+    ], new_command(asset_path: "/public/assets").sync_asset_volumes(old_version: 998)
   end
 
-  test "cut cord" do
+  test "clean up assets" do
-    assert_equal "rm -r corddir", new_command.cut_cord("corddir").join(" ")
+    assert_equal [
+      :find, ".kamal/assets/extracted", "-maxdepth 1", "-name", "'app-web-*'", "!", "-name", "app-web-999", "-exec rm -rf \"{}\" +", ";",
+      :find, ".kamal/assets/volumes", "-maxdepth 1", "-name", "'app-web-*'", "!", "-name", "app-web-999", "-exec rm -rf \"{}\" +"
+    ], new_command(asset_path: "/public/assets").clean_up_assets
   end
 
   private
-    def new_command(role: "web")
+    def new_command(role: "web", host: "1.1.1.1", **additional_config)
-      Kamal::Commands::App.new(Kamal::Configuration.new(@config, destination: @destination, version: "999"), role: role)
+      config = Kamal::Configuration.new(@config.merge(additional_config), destination: @destination, version: "999")
+      Kamal::Commands::App.new(config, role: config.role(role), host: host)
     end
 end

test/commands/builder_test.rb

@@ -6,7 +6,7 @@ class CommandsBuilderTest < ActiveSupport::TestCase
   end
 
   test "target multiarch by default" do
-    builder = new_builder_command(builder: { "cache" => { "type" => "gha" }})
+    builder = new_builder_command(builder: { "cache" => { "type" => "gha" } })
     assert_equal "multiarch", builder.name
     assert_equal \
       "docker buildx build --push --platform linux/amd64,linux/arm64 --builder kamal-app-multiarch -t dhh/app:123 -t dhh/app:latest --cache-to type=gha --cache-from type=gha --label service=\"app\" --file Dockerfile .",
@@ -22,7 +22,7 @@ class CommandsBuilderTest < ActiveSupport::TestCase
   end
 
   test "target native cached when multiarch is off and cache is set" do
-    builder = new_builder_command(builder: { "multiarch" => false, "cache" => { "type" => "gha" }})
+    builder = new_builder_command(builder: { "multiarch" => false, "cache" => { "type" => "gha" } })
     assert_equal "native/cached", builder.name
     assert_equal \
       "docker buildx build --push -t dhh/app:123 -t dhh/app:latest --cache-to type=gha --cache-from type=gha --label service=\"app\" --file Dockerfile .",
@@ -30,13 +30,21 @@ class CommandsBuilderTest < ActiveSupport::TestCase
   end
 
   test "target multiarch remote when local and remote is set" do
-    builder = new_builder_command(builder: { "local" => { }, "remote" => { }, "cache" => { "type" => "gha" } })
+    builder = new_builder_command(builder: { "local" => {}, "remote" => {}, "cache" => { "type" => "gha" } })
     assert_equal "multiarch/remote", builder.name
     assert_equal \
       "docker buildx build --push --platform linux/amd64,linux/arm64 --builder kamal-app-multiarch-remote -t dhh/app:123 -t dhh/app:latest --cache-to type=gha --cache-from type=gha --label service=\"app\" --file Dockerfile .",
       builder.push.join(" ")
   end
 
+  test "target multiarch local when arch is set" do
+    builder = new_builder_command(builder: { "local" => { "arch" => "amd64" } })
+    assert_equal "multiarch", builder.name
+    assert_equal \
+      "docker buildx build --push --platform linux/amd64 --builder kamal-app-multiarch -t dhh/app:123 -t dhh/app:latest --label service=\"app\" --file Dockerfile .",
+      builder.push.join(" ")
+  end
+
   test "target native remote when only remote is set" do
     builder = new_builder_command(builder: { "remote" => { "arch" => "amd64" }, "cache" => { "type" => "gha" } })
     assert_equal "native/remote", builder.name
@@ -53,7 +61,7 @@ class CommandsBuilderTest < ActiveSupport::TestCase
   end
 
   test "build secrets" do
-    builder = new_builder_command(builder: { "secrets" => ["token_a", "token_b"] })
+    builder = new_builder_command(builder: { "secrets" => [ "token_a", "token_b" ] })
     assert_equal \
       "-t dhh/app:123 -t dhh/app:latest --label service=\"app\" --secret id=\"token_a\" --secret id=\"token_b\" --file Dockerfile",
       builder.target.build_options.join(" ")
@@ -75,6 +83,13 @@ class CommandsBuilderTest < ActiveSupport::TestCase
     end
   end
 
+  test "build target" do
+    builder = new_builder_command(builder: { "target" => "prod" })
+    assert_equal \
+      "-t dhh/app:123 -t dhh/app:latest --label service=\"app\" --file Dockerfile --target prod",
+      builder.target.build_options.join(" ")
+  end
+
   test "build context" do
     builder = new_builder_command(builder: { "context" => ".." })
     assert_equal \
@@ -103,8 +118,52 @@ class CommandsBuilderTest < ActiveSupport::TestCase
       builder.push.join(" ")
   end
 
+  test "build with ssh agent socket" do
+    builder = new_builder_command(builder: { "ssh" => "default=$SSH_AUTH_SOCK" })
+
+    assert_equal \
+      "-t dhh/app:123 -t dhh/app:latest --label service=\"app\" --file Dockerfile --ssh default=$SSH_AUTH_SOCK",
+      builder.target.build_options.join(" ")
+  end
+
+  test "validate image" do
+    assert_equal "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:123 | grep -x app || (echo \"Image dhh/app:123 is missing the 'service' label\" && exit 1)", new_builder_command.validate_image.join(" ")
+  end
+
+  test "multiarch context build" do
+    builder = new_builder_command(builder: { "context" => "./foo" })
+    assert_equal \
+      "docker buildx build --push --platform linux/amd64,linux/arm64 --builder kamal-app-multiarch -t dhh/app:123 -t dhh/app:latest --label service=\"app\" --file Dockerfile ./foo",
+      builder.push.join(" ")
+  end
+
+  test "native context build" do
+    builder = new_builder_command(builder: { "multiarch" => false, "context" => "./foo" })
+    assert_equal \
+      "docker build -t dhh/app:123 -t dhh/app:latest --label service=\"app\" --file Dockerfile ./foo && docker push dhh/app:123 && docker push dhh/app:latest",
+      builder.push.join(" ")
+  end
+
+  test "cached context build" do
+    builder = new_builder_command(builder: { "multiarch" => false, "context" => "./foo", "cache" => { "type" => "gha" } })
+    assert_equal \
+      "docker buildx build --push -t dhh/app:123 -t dhh/app:latest --cache-to type=gha --cache-from type=gha --label service=\"app\" --file Dockerfile ./foo",
+      builder.push.join(" ")
+  end
+
+  test "remote context build" do
+    builder = new_builder_command(builder: { "remote" => { "arch" => "amd64" }, "context" => "./foo" })
+    assert_equal \
+      "docker buildx build --push --platform linux/amd64 --builder kamal-app-native-remote -t dhh/app:123 -t dhh/app:latest --label service=\"app\" --file Dockerfile ./foo",
+      builder.push.join(" ")
+  end
+
   private
     def new_builder_command(additional_config = {})
       Kamal::Commands::Builder.new(Kamal::Configuration.new(@config.merge(additional_config), version: "123"))
     end
+
+    def build_directory
+      "#{Dir.tmpdir}/kamal-clones/app/kamal/"
+    end
 end

test/commands/docker_test.rb

@@ -9,7 +9,7 @@ class CommandsDockerTest < ActiveSupport::TestCase
   end
 
   test "install" do
-    assert_equal "curl -fsSL https://get.docker.com | sh", @docker.install.join(" ")
+    assert_equal "sh -c 'curl -fsSL https://get.docker.com || wget -O - https://get.docker.com || echo \"exit 1\"' | sh", @docker.install.join(" ")
   end
 
   test "installed?" do
@@ -21,6 +21,6 @@ class CommandsDockerTest < ActiveSupport::TestCase
   end
 
   test "superuser?" do
-    assert_equal '[ "${EUID:-$(id -u)}" -eq 0 ]', @docker.superuser?.join(" ")
+    assert_equal '[ "${EUID:-$(id -u)}" -eq 0 ] || command -v sudo >/dev/null || command -v su >/dev/null', @docker.superuser?.join(" ")
   end
 end

test/commands/healthcheck_test.rb

@@ -1,107 +0,0 @@
-require "test_helper"
-
-class CommandsHealthcheckTest < ActiveSupport::TestCase
-  setup do
-    @config = {
-      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ],
-      traefik: { "args" => { "accesslog.format" => "json", "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
-    }
-  end
-
-  test "run" do
-    assert_equal \
-      "docker run --detach --name healthcheck-app-123 --publish 3999:3000 --label service=healthcheck-app -e KAMAL_CONTAINER_NAME=\"healthcheck-app\" --env-file .kamal/env/roles/app-web.env --health-cmd \"curl -f http://localhost:3000/up || exit 1\" --health-interval \"1s\" dhh/app:123",
-      new_command.run.join(" ")
-  end
-
-  test "run with custom port" do
-    @config[:healthcheck] = { "port" => 3001 }
-
-    assert_equal \
-      "docker run --detach --name healthcheck-app-123 --publish 3999:3001 --label service=healthcheck-app -e KAMAL_CONTAINER_NAME=\"healthcheck-app\" --env-file .kamal/env/roles/app-web.env --health-cmd \"curl -f http://localhost:3001/up || exit 1\" --health-interval \"1s\" dhh/app:123",
-      new_command.run.join(" ")
-  end
-
-  test "run with destination" do
-    @destination = "staging"
-
-    assert_equal \
-      "docker run --detach --name healthcheck-app-staging-123 --publish 3999:3000 --label service=healthcheck-app-staging -e KAMAL_CONTAINER_NAME=\"healthcheck-app-staging\" --env-file .kamal/env/roles/app-web-staging.env --health-cmd \"curl -f http://localhost:3000/up || exit 1\" --health-interval \"1s\" dhh/app:123",
-      new_command.run.join(" ")
-  end
-
-  test "run with custom healthcheck" do
-    @config[:healthcheck] = { "cmd" => "/bin/up" }
-
-    assert_equal \
-      "docker run --detach --name healthcheck-app-123 --publish 3999:3000 --label service=healthcheck-app -e KAMAL_CONTAINER_NAME=\"healthcheck-app\" --env-file .kamal/env/roles/app-web.env --health-cmd \"/bin/up\" --health-interval \"1s\" dhh/app:123",
-      new_command.run.join(" ")
-  end
-
-  test "run with custom options" do
-    @config[:servers] = { "web" => { "hosts" => [ "1.1.1.1" ], "options" => { "mount" => "somewhere" } } }
-    @config[:healthcheck] = { "exposed_port" => 4999 }
-    assert_equal \
-      "docker run --detach --name healthcheck-app-123 --publish 4999:3000 --label service=healthcheck-app -e KAMAL_CONTAINER_NAME=\"healthcheck-app\" --env-file .kamal/env/roles/app-web.env --health-cmd \"curl -f http://localhost:3000/up || exit 1\" --health-interval \"1s\" --mount \"somewhere\" dhh/app:123",
-      new_command.run.join(" ")
-  end
-
-  test "status" do
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-123$ --quiet | xargs docker inspect --format '{{if .State.Health}}{{.State.Health.Status}}{{else}}{{.State.Status}}{{end}}'",
-      new_command.status.join(" ")
-  end
-
-  test "container_health_log" do
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-123$ --quiet | xargs docker inspect --format '{{json .State.Health}}'",
-      new_command.container_health_log.join(" ")
-  end
-
-  test "stop" do
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-123$ --quiet | xargs docker stop",
-      new_command.stop.join(" ")
-  end
-
-  test "stop with destination" do
-    @destination = "staging"
-
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-staging-123$ --quiet | xargs docker stop",
-      new_command.stop.join(" ")
-  end
-
-  test "remove" do
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-123$ --quiet | xargs docker container rm",
-      new_command.remove.join(" ")
-  end
-
-  test "remove with destination" do
-    @destination = "staging"
-
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-staging-123$ --quiet | xargs docker container rm",
-      new_command.remove.join(" ")
-  end
-
-  test "logs" do
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-123$ --quiet | xargs docker logs --tail 50 2>&1",
-      new_command.logs.join(" ")
-  end
-
-  test "logs with destination" do
-    @destination = "staging"
-
-    assert_equal \
-      "docker container ls --all --filter name=^healthcheck-app-staging-123$ --quiet | xargs docker logs --tail 50 2>&1",
-      new_command.logs.join(" ")
-  end
-
-  private
-    def new_command
-      Kamal::Commands::Healthcheck.new(Kamal::Configuration.new(@config, destination: @destination, version: "123"))
-    end
-end

test/commands/hook_test.rb

@@ -7,8 +7,7 @@ class CommandsHookTest < ActiveSupport::TestCase
     freeze_time
 
     @config = {
-      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ],
+      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ]
-      traefik: { "args" => { "accesslog.format" => "json", "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
     }
 
     @performer = `whoami`.strip

test/commands/lock_test.rb

@@ -3,31 +3,30 @@ require "test_helper"
 class CommandsLockTest < ActiveSupport::TestCase
   setup do
     @config = {
-      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ],
+      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ]
-      traefik: { "args" => { "accesslog.format" => "json", "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
     }
   end
 
   test "status" do
     assert_equal \
-      "stat .kamal/lock-app > /dev/null && cat .kamal/lock-app/details | base64 -d",
+      "stat .kamal/locks/app-production > /dev/null && cat .kamal/locks/app-production/details | base64 -d",
       new_command.status.join(" ")
   end
 
   test "acquire" do
     assert_match \
-      %r{mkdir \.kamal/lock-app && echo ".*" > \.kamal/lock-app/details}m,
+      %r{mkdir \.kamal/locks/app-production && echo ".*" > \.kamal/locks/app-production/details}m,
       new_command.acquire("Hello", "123").join(" ")
   end
 
   test "release" do
     assert_match \
-      "rm .kamal/lock-app/details && rm -r .kamal/lock-app",
+      "rm .kamal/locks/app-production/details && rm -r .kamal/locks/app-production",
       new_command.release.join(" ")
   end
 
   private
     def new_command
-      Kamal::Commands::Lock.new(Kamal::Configuration.new(@config, version: "123"))
+      Kamal::Commands::Lock.new(Kamal::Configuration.new(@config, version: "123", destination: "production"))
     end
 end

test/commands/proxy_test.rb

@@ -0,0 +1,126 @@
+require "test_helper"
+
+class CommandsProxyTest < ActiveSupport::TestCase
+  setup do
+    @config = {
+      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ]
+    }
+
+    ENV["EXAMPLE_API_KEY"] = "456"
+  end
+
+  teardown do
+    ENV.delete("EXAMPLE_API_KEY")
+  end
+
+  test "run" do
+    assert_equal \
+      "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-opt max-size=\"10m\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}",
+      new_command.run.join(" ")
+  end
+
+  test "run with ports configured" do
+    assert_equal \
+      "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-opt max-size=\"10m\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}",
+      new_command.run.join(" ")
+  end
+
+  test "run without configuration" do
+    @config.delete(:proxy)
+
+    assert_equal \
+      "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-opt max-size=\"10m\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}",
+      new_command.run.join(" ")
+  end
+
+  test "run with logging config" do
+    @config[:logging] = { "driver" => "local", "options" => { "max-size" => "100m", "max-file" => "3" } }
+
+    assert_equal \
+      "docker run --name kamal-proxy --detach --restart unless-stopped --publish 80:80 --publish 443:443 --volume /var/run/docker.sock:/var/run/docker.sock --volume kamal-proxy:/root/.config/kamal-proxy --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" #{Kamal::Configuration::Proxy::DEFAULT_IMAGE}",
+      new_command.run.join(" ")
+  end
+
+  test "proxy start" do
+    assert_equal \
+      "docker container start kamal-proxy",
+      new_command.start.join(" ")
+  end
+
+  test "proxy stop" do
+    assert_equal \
+      "docker container stop kamal-proxy",
+      new_command.stop.join(" ")
+  end
+
+  test "proxy info" do
+    assert_equal \
+      "docker ps --filter name=^kamal-proxy$",
+      new_command.info.join(" ")
+  end
+
+  test "proxy logs" do
+    assert_equal \
+      "docker logs kamal-proxy --timestamps 2>&1",
+      new_command.logs.join(" ")
+  end
+
+  test "proxy logs since 2h" do
+    assert_equal \
+      "docker logs kamal-proxy  --since 2h --timestamps 2>&1",
+      new_command.logs(since: "2h").join(" ")
+  end
+
+  test "proxy logs last 10 lines" do
+    assert_equal \
+      "docker logs kamal-proxy  --tail 10 --timestamps 2>&1",
+      new_command.logs(lines: 10).join(" ")
+  end
+
+  test "proxy logs with grep hello!" do
+    assert_equal \
+      "docker logs kamal-proxy --timestamps 2>&1 | grep 'hello!'",
+      new_command.logs(grep: "hello!").join(" ")
+  end
+
+  test "proxy remove container" do
+    assert_equal \
+      "docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy",
+      new_command.remove_container.join(" ")
+  end
+
+  test "proxy remove image" do
+    assert_equal \
+      "docker image prune --all --force --filter label=org.opencontainers.image.title=kamal-proxy",
+      new_command.remove_image.join(" ")
+  end
+
+  test "proxy follow logs" do
+    assert_equal \
+      "ssh -t root@1.1.1.1 -p 22 'docker logs kamal-proxy --timestamps --tail 10 --follow 2>&1'",
+      new_command.follow_logs(host: @config[:servers].first)
+  end
+
+  test "proxy follow logs with grep hello!" do
+    assert_equal \
+      "ssh -t root@1.1.1.1 -p 22 'docker logs kamal-proxy --timestamps --tail 10 --follow 2>&1 | grep \"hello!\"'",
+      new_command.follow_logs(host: @config[:servers].first, grep: "hello!")
+  end
+
+  test "deploy" do
+    assert_equal \
+      "docker exec kamal-proxy kamal-proxy deploy service --target \"172.1.0.2:80\"",
+      new_command.deploy("service", target: "172.1.0.2:80").join(" ")
+  end
+
+  test "remove" do
+    assert_equal \
+      "docker exec kamal-proxy kamal-proxy remove service --target \"172.1.0.2:80\"",
+      new_command.remove("service", target: "172.1.0.2:80").join(" ")
+  end
+
+  private
+    def new_command
+      Kamal::Commands::Proxy.new(Kamal::Configuration.new(@config, version: "123"))
+    end
+end

test/commands/prune_test.rb

@@ -3,14 +3,13 @@ require "test_helper"
 class CommandsPruneTest < ActiveSupport::TestCase
   setup do
     @config = {
-      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ],
+      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ]
-      traefik: { "args" => { "accesslog.format" => "json", "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
     }
   end
 
   test "dangling images" do
     assert_equal \
-      "docker image prune --force --filter label=service=app --filter dangling=true",
+      "docker image prune --force --filter label=service=app",
       new_command.dangling_images.join(" ")
   end
 
@@ -20,10 +19,14 @@ class CommandsPruneTest < ActiveSupport::TestCase
       new_command.tagged_images.join(" ")
   end
 
-  test "containers" do
+  test "app containers" do
     assert_equal \
       "docker ps -q -a --filter label=service=app --filter status=created --filter status=exited --filter status=dead | tail -n +6 | while read container_id; do docker rm $container_id; done",
-      new_command.containers.join(" ")
+      new_command.app_containers(retain: 5).join(" ")
+
+    assert_equal \
+      "docker ps -q -a --filter label=service=app --filter status=created --filter status=exited --filter status=dead | tail -n +4 | while read container_id; do docker rm $container_id; done",
+      new_command.app_containers(retain: 3).join(" ")
   end
 
   private

test/commands/registry_test.rb

@@ -15,7 +15,7 @@ class CommandsRegistryTest < ActiveSupport::TestCase
 
   test "registry login" do
     assert_equal \
-      "docker login hub.docker.com -u dhh -p secret",
+      "docker login hub.docker.com -u \"dhh\" -p \"secret\"",
       @registry.login.join(" ")
   end
 
@@ -24,7 +24,18 @@ class CommandsRegistryTest < ActiveSupport::TestCase
     @config[:registry]["password"] = [ "KAMAL_REGISTRY_PASSWORD" ]
 
     assert_equal \
-      "docker login hub.docker.com -u dhh -p more-secret",
+      "docker login hub.docker.com -u \"dhh\" -p \"more-secret\"",
+      @registry.login.join(" ")
+  ensure
+    ENV.delete("KAMAL_REGISTRY_PASSWORD")
+  end
+
+  test "registry login escape password" do
+    ENV["KAMAL_REGISTRY_PASSWORD"] = "more-secret'\""
+    @config[:registry]["password"] = [ "KAMAL_REGISTRY_PASSWORD" ]
+
+    assert_equal \
+      "docker login hub.docker.com -u \"dhh\" -p \"more-secret'\\\"\"",
       @registry.login.join(" ")
   ensure
     ENV.delete("KAMAL_REGISTRY_PASSWORD")
@@ -35,7 +46,7 @@ class CommandsRegistryTest < ActiveSupport::TestCase
     @config[:registry]["username"] = [ "KAMAL_REGISTRY_USERNAME" ]
 
     assert_equal \
-      "docker login hub.docker.com -u also-secret -p secret",
+      "docker login hub.docker.com -u \"also-secret\" -p \"secret\"",
       @registry.login.join(" ")
   ensure
     ENV.delete("KAMAL_REGISTRY_USERNAME")

test/commands/server_test.rb

@@ -3,8 +3,7 @@ require "test_helper"
 class CommandsServerTest < ActiveSupport::TestCase
   setup do
     @config = {
-      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ],
+      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ]
-      traefik: { "args" => { "accesslog.format" => "json", "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
     }
   end
 

test/commands/traefik_test.rb

@@ -1,202 +0,0 @@
-require "test_helper"
-
-class CommandsTraefikTest < ActiveSupport::TestCase
-  setup do
-    @image = "traefik:test"
-
-    @config = {
-      service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ],
-      traefik: { "image" => @image, "args" => { "accesslog.format" => "json", "api.insecure" => true, "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
-    }
-
-    ENV["EXAMPLE_API_KEY"] = "456"
-  end
-
-  teardown do
-    ENV.delete("EXAMPLE_API_KEY")
-  end
-
-  test "run" do
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["host_port"] = "8080"
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 8080:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["publish"] = false
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with ports configured" do
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["options"] = {"publish" => %w[9000:9000 9001:9001]}
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" --publish \"9000:9000\" --publish \"9001:9001\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with volumes configured" do
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["options"] = {"volume" => %w[./letsencrypt/acme.json:/letsencrypt/acme.json] }
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" --volume \"./letsencrypt/acme.json:/letsencrypt/acme.json\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with several options configured" do
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["options"] = {"volume" => %w[./letsencrypt/acme.json:/letsencrypt/acme.json], "publish" => %w[8080:8080], "memory" => "512m"}
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" --volume \"./letsencrypt/acme.json:/letsencrypt/acme.json\" --publish \"8080:8080\" --memory \"512m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with labels configured" do
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["labels"] = { "traefik.http.routers.dashboard.service" => "api@internal", "traefik.http.routers.dashboard.middlewares" => "auth" }
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" --label traefik.http.routers.dashboard.service=\"api@internal\" --label traefik.http.routers.dashboard.middlewares=\"auth\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with env configured" do
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-
-    @config[:traefik]["env"] = { "secret" => %w[EXAMPLE_API_KEY] }
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run without configuration" do
-    @config.delete(:traefik)
-
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{Kamal::Commands::Traefik::DEFAULT_IMAGE} --providers.docker --log.level=\"DEBUG\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with logging config" do
-    @config[:logging] = { "driver" => "local", "options" => { "max-size" => "100m", "max-file" => "3" } }
-
-    assert_equal \
-      "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-driver \"local\" --log-opt max-size=\"100m\" --log-opt max-file=\"3\" #{@image} --providers.docker --log.level=\"DEBUG\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "run with default args overriden" do
-    @config[:traefik]["args"]["log.level"] = "ERROR"
-
-    assert_equal \
-    "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" #{@image} --providers.docker --log.level=\"ERROR\" --accesslog.format=\"json\" --api.insecure --metrics.prometheus.buckets=\"0.1,0.3,1.2,5.0\"",
-      new_command.run.join(" ")
-  end
-
-  test "traefik start" do
-    assert_equal \
-      "docker container start traefik",
-      new_command.start.join(" ")
-  end
-
-  test "traefik stop" do
-    assert_equal \
-      "docker container stop traefik",
-      new_command.stop.join(" ")
-  end
-
-  test "traefik info" do
-    assert_equal \
-      "docker ps --filter name=^traefik$",
-      new_command.info.join(" ")
-  end
-
-  test "traefik logs" do
-    assert_equal \
-      "docker logs traefik --timestamps 2>&1",
-      new_command.logs.join(" ")
-  end
-
-  test "traefik logs since 2h" do
-    assert_equal \
-      "docker logs traefik  --since 2h --timestamps 2>&1",
-      new_command.logs(since: '2h').join(" ")
-  end
-
-  test "traefik logs last 10 lines" do
-    assert_equal \
-      "docker logs traefik  --tail 10 --timestamps 2>&1",
-      new_command.logs(lines: 10).join(" ")
-  end
-
-  test "traefik logs with grep hello!" do
-    assert_equal \
-      "docker logs traefik --timestamps 2>&1 | grep 'hello!'",
-      new_command.logs(grep: 'hello!').join(" ")
-  end
-
-  test "traefik remove container" do
-    assert_equal \
-      "docker container prune --force --filter label=org.opencontainers.image.title=Traefik",
-      new_command.remove_container.join(" ")
-  end
-
-  test "traefik remove image" do
-    assert_equal \
-      "docker image prune --all --force --filter label=org.opencontainers.image.title=Traefik",
-      new_command.remove_image.join(" ")
-  end
-
-  test "traefik follow logs" do
-    assert_equal \
-      "ssh -t root@1.1.1.1 'docker logs traefik --timestamps --tail 10 --follow 2>&1'",
-      new_command.follow_logs(host: @config[:servers].first)
-  end
-
-  test "traefik follow logs with grep hello!" do
-    assert_equal \
-      "ssh -t root@1.1.1.1 'docker logs traefik --timestamps --tail 10 --follow 2>&1 | grep \"hello!\"'",
-      new_command.follow_logs(host: @config[:servers].first, grep: 'hello!')
-  end
-
-  test "env_file" do
-    @config[:traefik]["env"] = { "secret" => %w[EXAMPLE_API_KEY] }
-
-    assert_equal "EXAMPLE_API_KEY=456\n", new_command.env_file
-  end
-
-  test "host_env_file_path" do
-    assert_equal ".kamal/env/traefik/traefik.env", new_command.host_env_file_path
-  end
-
-  test "make_env_directory" do
-    assert_equal "mkdir -p .kamal/env/traefik", new_command.make_env_directory.join(" ")
-  end
-
-  test "remove_env_file" do
-    assert_equal "rm -f .kamal/env/traefik/traefik.env", new_command.remove_env_file.join(" ")
-  end
-
-  private
-    def new_command
-      Kamal::Commands::Traefik.new(Kamal::Configuration.new(@config, version: "123"))
-    end
-end

test/configuration/accessory_test.rb

@@ -20,7 +20,7 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
             },
             "secret" => [
               "MYSQL_ROOT_PASSWORD"
-            ],
+            ]
           },
           "files" => [
             "config/mysql/my.cnf:/etc/mysql/my.cnf",
@@ -49,6 +49,7 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
           }
         },
         "monitoring" => {
+          "service" => "custom-monitoring",
           "image" => "monitoring:latest",
           "roles" => [ "web" ],
           "port" => "4321:4321",
@@ -72,6 +73,7 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
   test "service name" do
     assert_equal "app-mysql", @config.accessory(:mysql).service_name
     assert_equal "app-redis", @config.accessory(:redis).service_name
+    assert_equal "custom-monitoring", @config.accessory(:monitoring).service_name
   end
 
   test "port" do
@@ -80,9 +82,9 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
   end
 
   test "host" do
-    assert_equal ["1.1.1.5"], @config.accessory(:mysql).hosts
+    assert_equal [ "1.1.1.5" ], @config.accessory(:mysql).hosts
-    assert_equal ["1.1.1.6", "1.1.1.7"], @config.accessory(:redis).hosts
+    assert_equal [ "1.1.1.6", "1.1.1.7" ], @config.accessory(:redis).hosts
-    assert_equal ["1.1.1.1", "1.1.1.2"], @config.accessory(:monitoring).hosts
+    assert_equal [ "1.1.1.1", "1.1.1.2" ], @config.accessory(:monitoring).hosts
   end
 
   test "missing host" do
@@ -105,40 +107,40 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
     assert_equal "Specify one of `host`, `hosts` or `roles` for accessory `mysql`", exception.message
   end
 
+  test "all hosts" do
+    assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4", "1.1.1.5", "1.1.1.6", "1.1.1.7" ], @config.all_hosts
+  end
+
   test "label args" do
-    assert_equal ["--label", "service=\"app-mysql\""], @config.accessory(:mysql).label_args
+    assert_equal [ "--label", "service=\"app-mysql\"" ], @config.accessory(:mysql).label_args
-    assert_equal ["--label", "service=\"app-redis\"", "--label", "cache=\"true\""], @config.accessory(:redis).label_args
+    assert_equal [ "--label", "service=\"app-redis\"", "--label", "cache=\"true\"" ], @config.accessory(:redis).label_args
   end
 
   test "env args" do
-    assert_equal ["--env-file", ".kamal/env/accessories/app-mysql.env"], @config.accessory(:mysql).env_args
+    assert_equal [ "--env-file", ".kamal/env/accessories/app-mysql.env", "--env", "MYSQL_ROOT_HOST=\"%\"" ], @config.accessory(:mysql).env_args
-    assert_equal ["--env-file", ".kamal/env/accessories/app-redis.env"], @config.accessory(:redis).env_args
+    assert_equal [ "--env-file", ".kamal/env/accessories/app-redis.env", "--env", "SOMETHING=\"else\"" ], @config.accessory(:redis).env_args
   end
 
-  test "env file with secret" do
+  test "env with secrets" do
     ENV["MYSQL_ROOT_PASSWORD"] = "secret123"
 
-    expected = <<~ENV
+    expected_secrets_file = <<~ENV
       MYSQL_ROOT_PASSWORD=secret123
-      MYSQL_ROOT_HOST=%
     ENV
 
-    assert_equal expected, @config.accessory(:mysql).env_file
+    assert_equal expected_secrets_file, @config.accessory(:mysql).env.secrets_io.string
+    assert_equal [ "--env-file", ".kamal/env/accessories/app-mysql.env", "--env", "MYSQL_ROOT_HOST=\"%\"" ], @config.accessory(:mysql).env_args
   ensure
     ENV["MYSQL_ROOT_PASSWORD"] = nil
   end
 
-  test "host_env_directory" do
+  test "env secrets path" do
-    assert_equal ".kamal/env/accessories", @config.accessory(:mysql).host_env_directory
+    assert_equal ".kamal/env/accessories/app-mysql.env", @config.accessory(:mysql).env.secrets_file
-  end
-
-  test "host_env_file_path" do
-    assert_equal ".kamal/env/accessories/app-mysql.env", @config.accessory(:mysql).host_env_file_path
   end
 
   test "volume args" do
-    assert_equal ["--volume", "$PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf", "--volume", "$PWD/app-mysql/docker-entrypoint-initdb.d/structure.sql:/docker-entrypoint-initdb.d/structure.sql", "--volume", "$PWD/app-mysql/data:/var/lib/mysql"], @config.accessory(:mysql).volume_args
+    assert_equal [ "--volume", "$PWD/app-mysql/etc/mysql/my.cnf:/etc/mysql/my.cnf", "--volume", "$PWD/app-mysql/docker-entrypoint-initdb.d/structure.sql:/docker-entrypoint-initdb.d/structure.sql", "--volume", "$PWD/app-mysql/data:/var/lib/mysql" ], @config.accessory(:mysql).volume_args
-    assert_equal ["--volume", "/var/lib/redis:/data"], @config.accessory(:redis).volume_args
+    assert_equal [ "--volume", "/var/lib/redis:/data" ], @config.accessory(:redis).volume_args
   end
 
   test "dynamic file expansion" do
@@ -149,11 +151,17 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
     assert_match "%", @config.accessory(:mysql).files.keys[2].read
   end
 
-  test "directories" do
+  test "directory with a relative path" do
-    assert_equal({"$PWD/app-mysql/data"=>"/var/lib/mysql"}, @config.accessory(:mysql).directories)
+    @deploy[:accessories]["mysql"]["directories"] = [ "data:/var/lib/mysql" ]
+    assert_equal({ "$PWD/app-mysql/data"=>"/var/lib/mysql" }, @config.accessory(:mysql).directories)
+  end
+
+  test "directory with an absolute path" do
+    @deploy[:accessories]["mysql"]["directories"] = [ "/var/data/mysql:/var/lib/mysql" ]
+    assert_equal({ "/var/data/mysql"=>"/var/lib/mysql" }, @config.accessory(:mysql).directories)
   end
 
   test "options" do
-    assert_equal ["--cpus", "\"4\"", "--memory", "\"2GB\""], @config.accessory(:redis).option_args
+    assert_equal [ "--cpus", "\"4\"", "--memory", "\"2GB\"" ], @config.accessory(:redis).option_args
   end
 end

test/configuration/builder_test.rb

@@ -124,9 +124,9 @@ class ConfigurationBuilderTest < ActiveSupport::TestCase
   end
 
   test "setting secrets" do
-    @deploy_with_builder_option[:builder] = { "secrets" => ["GITHUB_TOKEN"] }
+    @deploy_with_builder_option[:builder] = { "secrets" => [ "GITHUB_TOKEN" ] }
 
-    assert_equal ["GITHUB_TOKEN"], @config_with_builder_option.builder.secrets
+    assert_equal [ "GITHUB_TOKEN" ], @config_with_builder_option.builder.secrets
   end
 
   test "dockerfile" do
@@ -148,4 +148,14 @@ class ConfigurationBuilderTest < ActiveSupport::TestCase
 
     assert_equal "..", @config_with_builder_option.builder.context
   end
+
+  test "ssh" do
+    assert_nil @config.builder.ssh
+  end
+
+  test "setting ssh params" do
+    @deploy_with_builder_option[:builder] = { "ssh" => "default=$SSH_AUTH_SOCK" }
+
+    assert_equal "default=$SSH_AUTH_SOCK", @config_with_builder_option.builder.ssh
+  end
 end