Bump version for 0.6.2

Auto rotation, max is 100mb

.gitignore

@@ -1,2 +1,4 @@
 .byebug_history
 *.gem
+coverage/*
+.DS_Store

Gemfile

@@ -4,4 +4,5 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 gemspec
 
 gem "debug"
+gem "mocha"
 gem "railties"

Gemfile.lock

@@ -1,10 +1,12 @@
 PATH
   remote: .
   specs:
-    mrsk (0.3.1)
+    mrsk (0.6.2)
       activesupport (>= 7.0)
+      dotenv (~> 2.8)
       sshkit (~> 1.21)
       thor (~> 1.2)
+      zeitwerk (~> 2.5)
 
 GEM
   remote: https://rubygems.org/
@@ -33,6 +35,7 @@ GEM
     debug (1.7.1)
       irb (>= 1.5.0)
       reline (>= 0.3.1)
+    dotenv (2.8.1)
     erubi (1.12.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
@@ -44,6 +47,8 @@ GEM
       nokogiri (>= 1.5.9)
     method_source (1.0.0)
     minitest (5.17.0)
+    mocha (2.0.2)
+      ruby2_keywords (>= 0.0.5)
     net-scp (4.0.0)
       net-ssh (>= 2.6.5, < 8.0.0)
     net-ssh (7.0.1)
@@ -72,6 +77,7 @@ GEM
     rake (13.0.6)
     reline (0.3.2)
       io-console (~> 0.5)
+    ruby2_keywords (0.0.5)
     sshkit (1.21.3)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
@@ -86,10 +92,12 @@ PLATFORMS
   arm64-darwin-22
   x86_64-darwin-20
   x86_64-darwin-21
+  x86_64-darwin-22
   x86_64-linux
 
 DEPENDENCIES
   debug
+  mocha
   mrsk!
   railties
 

README.md

@@ -1,10 +1,10 @@
 # MRSK
 
-MRSK deploys Rails apps in containers to servers running Docker with zero downtime. It uses the dynamic reverse-proxy Traefik to hold requests while the new application container is started and the old one is stopped. It works seamlessly across multiple hosts, using SSHKit to execute commands.
+MRSK deploys web apps in containers to servers running Docker with zero downtime. It uses the dynamic reverse-proxy Traefik to hold requests while the new application container is started and the old one is stopped. It works seamlessly across multiple hosts, using SSHKit to execute commands.
 
 ## Installation
 
-Install MRSK globally with `gem install mrsk`. Then, inside your app directory, run `mrsk install`. Now edit the new file `config/deploy.yml`. It could look as simple as this:
+Install MRSK globally with `gem install mrsk`. Then, inside your app directory, run `mrsk init` (or `mrsk init --bundle` within Rails apps where you want a bin/mrsk binstub). Now edit the new file `config/deploy.yml`. It could look as simple as this:
 
 ```yaml
 service: hey
@@ -15,12 +15,17 @@ servers:
 registry:
   username: registry-user-name
   password: <%= ENV.fetch("MRSK_REGISTRY_PASSWORD") %>
+env:
+  secret:
+    - RAILS_MASTER_KEY
 ```
 
-Now you're ready to deploy a multi-arch image to the servers:
+Then edit your `.env` file to add your registry password as `MRSK_REGISTRY_PASSWORD` (and your `RAILS_MASTER_KEY` for production with a Rails app).
+
+Now you're ready to deploy to the servers:
 
 ```
-MRSK_REGISTRY_PASSWORD=pw mrsk deploy
+mrsk deploy
 ```
 
 This will:
@@ -38,14 +43,25 @@ This will:
 
 Voila! All the servers are now serving the app on port 80. If you're just running a single server, you're ready to go. If you're running multiple servers, you need to put a load balancer in front of them.
 
-## Why not just run Capistrano or Kubernetes?
+## Why not just run Capistrano, Kubernetes or Docker Swarm?
 
 MRSK basically is Capistrano for Containers, which allow us to use vanilla servers as the hosts. No need to ensure that the servers have just the right version of Ruby or other dependencies you need. That all lives in the Docker image now. You can boot a brand new Ubuntu (or whatever) server, add it to the deploy servers of MRSK, and it'll be auto-provisioned with Docker, and run right away. Docker's layer caching also allows for quicker deployments with less mucking about on the server. And the images built for MRSK can be used for CI or later introspection.
 
-Kubernetes is a beast. Running it yourself on your own hardware is not for the faint of heart. It's a fine option if you want to run on someone else's platform, like Render or Fly, but if you'd like the freedom to move between cloud and your own hardware, or even mix the two, MRSK is much simpler. You can see everything that's going on, it's just basic Docker commands being called.
+Kubernetes is a beast. Running it yourself on your own hardware is not for the faint of heart. It's a fine option if you want to run on someone else's platform, either transparently [like Render](https://thenewstack.io/render-cloud-deployment-with-less-engineering/) or explicitly on AWS/GCP, but if you'd like the freedom to move between cloud and your own hardware, or even mix the two, MRSK is much simpler. You can see everything that's going on, it's just basic Docker commands being called.
+
+Docker Swarm is much simpler than Kubernetes, but it's still built on the same declarative model that uses state reconciliation. MRSK is intentionally designed to around imperative commands, like Capistrano.
 
 ## Configuration
 
+### Using .env file to load required environment variables
+
+MRSK uses [dotenv](https://github.com/bkeepers/dotenv) to automatically load environment variables set in the `.env` file present in the application root. This file can be used to set variables like `MRSK_REGISTRY_PASSWORD` or database passwords. But for this reason you must ensure that .env files are not checked into Git or included in your Dockerfile! The format is just key-value like:
+
+```bash
+MRSK_REGISTRY_PASSWORD=pw
+DB_PASSWORD=secret123
+```
+
 ### Using another registry than Docker Hub
 
 The default registry is Docker Hub, but you can change it using `registry/server`:
@@ -59,10 +75,27 @@ registry:
 
 ### Using a different SSH user than root
 
-The default SSH user is root, but you can change it using `ssh_user`:
+The default SSH user is root, but you can change it using `ssh/user`:
 
 ```yaml
-ssh_user: app
+ssh:
+  user: app
+```
+
+### Using a proxy SSH host
+
+If you need to connect to server through a proxy host, you can use `ssh/proxy`:
+
+```yaml
+ssh:
+  proxy: "192.168.0.1" # defaults to root as the user
+```
+
+Or with specific user:
+
+```yaml
+ssh:
+  proxy: "app@192.168.0.1"
 ```
 
 ### Using env variables
@@ -216,14 +249,27 @@ builder:
 
 This build secret can then be referenced in the Dockerfile:
 
-```
+```dockerfile
 # Copy Gemfiles
 COPY Gemfile Gemfile.lock ./
 
-# Install dependencies, including private repositories via access token
+# Install dependencies, including private repositories via access token (then remove git configs with exposed GITHUB_TOKEN)
 RUN --mount=type=secret,id=GITHUB_TOKEN \
   BUNDLE_GITHUB__COM=x-access-token:$(cat /run/secrets/GITHUB_TOKEN) \
-  bundle install
+  bundle install && \
+  find /usr/local/bundle/cache/bundler/git -name "config" -delete
+```
+
+### Using command arguments for Traefik
+
+You can customize the traefik command line:
+
+```yaml
+traefik:
+  accesslog: true
+  accesslog.format: json
+  metrics.prometheus: true
+  metrics.prometheus.buckets: 0.1,0.3,1.2,5.0
 ```
 
 ### Configuring build args for new images
@@ -244,14 +290,6 @@ ARG RUBY_VERSION
 FROM ruby:$RUBY_VERSION-slim as base
 ```
 
-### Using without RAILS_MASTER_KEY
-
-If you're using MRSK with older Rails apps that predate RAILS_MASTER_KEY, or with a non-Rails app, you can skip the default usage and reference:
-
-```yaml
-skip_master_key: true
-```
-
 ### Using accessories for database, cache, search services
 
 You can manage your accessory services via MRSK as well. The services will build off public images, and will not be automatically updated when you deploy:
@@ -279,11 +317,28 @@ accessories:
 
 Now run `mrsk accessory start mysql` to start the MySQL server on 1.1.1.3. See `mrsk accessory` for all the commands possible.
 
+### Using a generated .env file
+
+If you're using a centralized secret store, like 1Password, you can create `.env.erb` as a template which looks up the secrets. Example of a .env.erb file:
+
+```erb
+<% if (session_token = `op signin --account my-one-password-account --raw`.strip) != "" %># Generated by mrsk envify
+GITHUB_TOKEN=<%= `gh config get -h github.com oauth_token`.strip %>
+MRSK_REGISTRY_PASSWORD=<%= `op read "op://Vault/Docker Hub/password" -n --session  #{session_token}` %>
+RAILS_MASTER_KEY=<%= `op read "op://Vault/My App/RAILS_MASTER_SECRET" -n --session #{session_token}` %>
+MYSQL_ROOT_PASSWORD=<%= `op read "op://Vault/My App/MYSQL_ROOT_PASSWORD" -n --session #{session_token}` %>
+<% else raise ArgumentError, "Session token missing" end %>
+```
+
+This template can safely be checked into git. Then everyone deploying the app can run `mrsk envify` when they setup the app for the first time or passwords change to get the correct `.env` file.
+
+If you need separate env variables for different destinations, you can set them with `.env.destination.erb` for the template, which will generate `.env.staging` when run with `mrsk envify -d staging`.
+
 ## Commands
 
-### Running remote execution and runners
+### Running commands on servers
 
-If you need to execute commands inside the Rails containers, you can use `mrsk app exec` and `mrsk app runner`. Examples:
+You can execute one-off commands on the servers:
 
 ```bash
 # Runs command on all servers
@@ -326,13 +381,25 @@ Database adapter          sqlite3
 Database schema version   20221231233303
 
 # Run Rails runner on primary server
-mrsk app runner -p 'puts Rails.application.config.time_zone'
+mrsk app exec -p 'bin/rails runner "puts Rails.application.config.time_zone"'
 UTC
 ```
 
-### Running a Rails console
+### Running interactive commands over SSH
+
+You can run interactive commands, like a Rails console or a bash session, on a server (default is primary, use `--hosts` to connect to another):
+
+```bash
+# Starts a bash session in a new container made from the most recent app image
+mrsk app exec -i bash
+
+# Starts a bash session in the currently running container for the app
+mrsk app exec -i --reuse bash
+
+# Starts a Rails console in a new container made from the most recent app image
+mrsk app exec -i 'bin/rails console'
+```
 
-If you need to interact with the production console for the app, you can use `mrsk app console`, which will start a Rails console session on the primary host. You can start the console on a different host using `mrsk app console --host 192.168.0.2`. Be mindful that this is a live wire! Any changes made to the production database will take effect immeditately.
 
 ### Running details to see state of containers
 

bin/mrsk

@@ -3,11 +3,14 @@
 # Prevent failures from being reported twice.
 Thread.report_on_exception = false
 
-require "mrsk/cli"
+require "mrsk"
 
 begin
   Mrsk::Cli::Main.start(ARGV)
 rescue SSHKit::Runner::ExecuteError => e
   puts "  \e[31mERROR (#{e.cause.class}): #{e.cause.message}\e[0m"
   puts e.cause.backtrace if ENV["VERBOSE"]
+rescue => e
+  puts "  \e[31mERROR (#{e.class}): #{e.message}\e[0m"
+  puts e.backtrace if ENV["VERBOSE"]
 end

lib/mrsk.rb

@@ -1,5 +1,9 @@
 module Mrsk
 end
 
-require "mrsk/version"
-require "mrsk/commander"
+require "zeitwerk"
+
+loader = Zeitwerk::Loader.for_gem
+loader.ignore("#{__dir__}/mrsk/sshkit_with_ext.rb")
+loader.setup
+loader.eager_load # We need all commands loaded.

lib/mrsk/cli.rb

@@ -1,9 +1,5 @@
-require "mrsk"
-
 module Mrsk::Cli
 end
 
 # SSHKit uses instance eval, so we need a global const for ergonomics
 MRSK = Mrsk::Commander.new
-
-require "mrsk/cli/main"

lib/mrsk/cli/accessory.rb

@@ -1,5 +1,3 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::Accessory < Mrsk::Cli::Base
   desc "boot [NAME]", "Boot accessory service on host (use NAME=all to boot all accessories)"
   def boot(name)
@@ -9,7 +7,11 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
       with_accessory(name) do |accessory|
         directories(name)
         upload(name)
-        on(accessory.host) { execute *accessory.run }
+
+        on(accessory.host) do
+          execute *MRSK.auditor.record("accessory #{name} boot"), verbosity: :debug
+          execute *accessory.run
+        end
       end
     end
   end
@@ -18,6 +20,8 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
   def upload(name)
     with_accessory(name) do |accessory|
       on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} upload files"), verbosity: :debug
+
         accessory.files.each do |(local, remote)|
           accessory.ensure_local_file_present(local)
 
@@ -33,6 +37,8 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
   def directories(name)
     with_accessory(name) do |accessory|
       on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} create directories"), verbosity: :debug
+
         accessory.directories.keys.each do |host_path|
           execute *accessory.make_directory(host_path)
         end
@@ -52,14 +58,20 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
   desc "start [NAME]", "Start existing accessory on host"
   def start(name)
     with_accessory(name) do |accessory|
-      on(accessory.host) { execute *accessory.start }
+      on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} start"), verbosity: :debug
+        execute *accessory.start
+      end
     end
   end
 
   desc "stop [NAME]", "Stop accessory on host"
   def stop(name)
     with_accessory(name) do |accessory|
-      on(accessory.host) { execute *accessory.stop, raise_on_non_zero_exit: false }
+      on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} stop"), verbosity: :debug
+        execute *accessory.stop, raise_on_non_zero_exit: false
+      end
     end
   end
 
@@ -82,21 +94,33 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
     end
   end
 
-  desc "exec [NAME] [CMD]", "Execute a custom command on accessory host"
-  option :run, type: :boolean, default: false, desc: "Start a new container to run the command rather than reusing existing"
+  desc "exec [NAME] [CMD]", "Execute a custom command on servers"
+  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|
-      runner = options[:run] ? :run_exec : :exec
-      on(accessory.host) { |host| puts_by_host host, capture_with_info(*accessory.send(runner, cmd)) }
-    end
-  end
+      case
+      when options[:interactive] && options[:reuse]
+        say "Launching interactive command with via SSH from existing container...", :magenta
+        run_locally { exec accessory.execute_in_existing_container_over_ssh(cmd) }
 
-  desc "bash [NAME]", "Start a bash session on primary host (or specific host set by --hosts)"
-  def bash(name)
-    with_accessory(name) do |accessory|
-      run_locally do
-        info "Launching bash session on #{accessory.host}"
-        exec accessory.bash(host: accessory.host)
+      when options[:interactive]
+        say "Launching interactive command via SSH from new container...", :magenta
+        run_locally { exec accessory.execute_in_new_container_over_ssh(cmd) }
+
+      when options[:reuse]
+        say "Launching command from existing container...", :magenta
+        on(accessory.host) do
+          execute *MRSK.auditor.record("accessory #{name} cmd '#{cmd}'"), verbosity: :debug
+          capture_with_info(*accessory.execute_in_existing_container(cmd))
+        end
+
+      else
+        say "Launching command from new container...", :magenta
+        on(accessory.host) do
+          execute *MRSK.auditor.record("accessory #{name} cmd '#{cmd}'"), verbosity: :debug
+          capture_with_info(*accessory.execute_in_new_container(cmd))
+        end
       end
     end
   end
@@ -118,7 +142,7 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
         end
       else
         since = options[:since]
-        lines = options[:lines]
+        lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
 
         on(accessory.host) do
           puts capture_with_info(*accessory.logs(since: since, lines: lines, grep: grep))
@@ -144,21 +168,30 @@ class Mrsk::Cli::Accessory < Mrsk::Cli::Base
   desc "remove_container [NAME]", "Remove accessory container from host"
   def remove_container(name)
     with_accessory(name) do |accessory|
-      on(accessory.host) { execute *accessory.remove_container }
+      on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} remove container"), verbosity: :debug
+        execute *accessory.remove_container
+      end
     end
   end
 
-  desc "remove_container [NAME]", "Remove accessory image from host"
+  desc "remove_image [NAME]", "Remove accessory image from host"
   def remove_image(name)
     with_accessory(name) do |accessory|
-      on(accessory.host) { execute *accessory.remove_image }
+      on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} remove image"), verbosity: :debug
+        execute *accessory.remove_image
+      end
     end
   end
 
   desc "remove_service_directory [NAME]", "Remove accessory directory used for uploaded files and data directories from host"
   def remove_service_directory(name)
     with_accessory(name) do |accessory|
-      on(accessory.host) { execute *accessory.remove_service_directory }
+      on(accessory.host) do
+        execute *MRSK.auditor.record("accessory #{name} remove service directory"), verbosity: :debug
+        execute *accessory.remove_service_directory
+      end
     end
   end
 

lib/mrsk/cli/app.rb

@@ -1,18 +1,27 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::App < Mrsk::Cli::Base
-  desc "boot", "Boot app on servers (or start them if they've already been booted)"
+  desc "boot", "Boot app on servers (or reboot app if already running)"
   def boot
-    MRSK.config.roles.each do |role|
-      on(role.hosts) do |host|
-        begin
-          execute *MRSK.app.run(role: role.name)
-        rescue SSHKit::Command::Failed => e
-          if e.message =~ /already in use/
-            error "Container with same version already deployed on #{host}, starting that instead"
-            execute *MRSK.app.start, host: host
-          else
-            raise
+    say "Get most recent version available as an image...", :magenta unless options[:version]
+    using_version(options[:version] || most_recent_version_available) do |version|
+      say "Start container with version #{version} (or reboot if already running)...", :magenta
+
+      MRSK.config.roles.each do |role|
+        on(role.hosts) do |host|
+          execute *MRSK.auditor.record("app boot version #{version}"), verbosity: :debug
+
+          begin
+            execute *MRSK.app.stop, raise_on_non_zero_exit: false
+            execute *MRSK.app.run(role: role.name)
+          rescue SSHKit::Command::Failed => e
+            if e.message =~ /already in use/
+              error "Rebooting container with same version already deployed on #{host}"
+              execute *MRSK.auditor.record("app rebooted with version #{version}"), verbosity: :debug
+
+              execute *MRSK.app.remove_container(version: version)
+              execute *MRSK.app.run(role: role.name)
+            else
+              raise
+            end
           end
         end
       end
@@ -20,18 +29,19 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
   end
 
   desc "start", "Start existing app on servers (use --version=<git-hash> to designate specific version)"
-  option :version, desc: "Defaults to the most recent git-hash in local repository"
   def start
-    if (version = options[:version]).present?
-      on(MRSK.hosts) { execute *MRSK.app.start(version: version) }
-    else
-      on(MRSK.hosts) { execute *MRSK.app.start, raise_on_non_zero_exit: false }
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("app start version #{MRSK.version}"), verbosity: :debug
+      execute *MRSK.app.start, raise_on_non_zero_exit: false
     end
   end
 
   desc "stop", "Stop app on servers"
   def stop
-    on(MRSK.hosts) { execute *MRSK.app.stop, raise_on_non_zero_exit: false }
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("app stop"), verbosity: :debug
+      execute *MRSK.app.stop, raise_on_non_zero_exit: false
+    end
   end
 
   desc "details", "Display details about app containers"
@@ -40,55 +50,55 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
   end
 
   desc "exec [CMD]", "Execute a custom command on servers"
-  option :method, aliases: "-m", default: "exec", desc: "Execution method: [exec] perform inside app container / [run] perform in new container / [ssh] perform over ssh"
+  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(cmd)
-    runner = \
-      case options[:method]
-      when "exec" then "exec"
-      when "run"  then "run_exec"
-      when "ssh"  then "exec_over_ssh"
-      else raise "Unknown method: #{options[:method]}"
-      end.inquiry
-
-    if runner.exec_over_ssh?
-      run_locally do
-        info "Launching command on #{MRSK.primary_host}"
-        exec MRSK.app.exec_over_ssh(cmd, host: MRSK.primary_host)
+    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 #{MRSK.primary_host}...", :magenta
+        run_locally { exec MRSK.app.execute_in_existing_container_over_ssh(cmd, host: MRSK.primary_host) }
       end
+
+    when options[:interactive]
+      say "Get most recent version available as an image...", :magenta unless options[:version]
+      using_version(options[:version] || most_recent_version_available) do |version|
+        say "Launching interactive command with version #{version} via SSH from new container on #{MRSK.primary_host}...", :magenta
+        run_locally { exec MRSK.app.execute_in_new_container_over_ssh(cmd, host: MRSK.primary_host) }
+      end
+
+    when options[:reuse]
+      say "Get current version of running container...", :magenta unless options[:version]
+      using_version(options[:version] || current_running_version) do |version|
+        say "Launching command with version #{version} from existing container...", :magenta
+
+        on(MRSK.hosts) do |host|
+          execute *MRSK.auditor.record("app cmd '#{cmd}' with version #{version}"), verbosity: :debug
+          puts_by_host host, capture_with_info(*MRSK.app.execute_in_existing_container(cmd))
+        end
+      end
+
     else
-      on(MRSK.hosts) { |host| puts_by_host host, capture_with_info(*MRSK.app.send(runner, cmd)) }
+      say "Get most recent version available as an image...", :magenta unless options[:version]
+      using_version(options[:version] || most_recent_version_available) do |version|
+        say "Launching command with version #{version} from new container...", :magenta
+        on(MRSK.hosts) do |host|
+          execute *MRSK.auditor.record("app cmd '#{cmd}' with version #{version}"), verbosity: :debug
+          puts_by_host host, capture_with_info(*MRSK.app.execute_in_new_container(cmd))
+        end
+      end
     end
   end
 
-  desc "console", "Start Rails Console on primary host (or specific host set by --hosts)"
-  def console
-    run_locally do
-      info "Launching Rails console on #{MRSK.primary_host}"
-      exec MRSK.app.console(host: MRSK.primary_host)
-    end
-  end
-
-  desc "bash", "Start a bash session on primary host (or specific host set by --hosts)"
-  def bash
-    run_locally do
-      info "Launching bash session on #{MRSK.primary_host}"
-      exec MRSK.app.bash(host: MRSK.primary_host)
-    end
-  end
-
-  desc "runner [EXPRESSION]", "Execute Rails runner with given expression"
-  def runner(expression)
-    on(MRSK.hosts) { |host| puts_by_host host, capture_with_info(*MRSK.app.exec("bin/rails", "runner", "'#{expression}'")) }
-  end
-
   desc "containers", "List all the app containers currently on servers"
   def containers
     on(MRSK.hosts) { |host| puts_by_host host, capture_with_info(*MRSK.app.list_containers) }
   end
 
-  desc "current", "Return the current running container ID"
-  def current
-    on(MRSK.hosts) { |host| puts_by_host host, capture_with_info(*MRSK.app.current_container_id) }
+  desc "images", "List all the app images currently on servers"
+  def images
+    on(MRSK.hosts) { |host| puts_by_host host, capture_with_info(*MRSK.app.list_images) }
   end
 
   desc "logs", "Show lines from app on servers"
@@ -109,7 +119,7 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
       end
     else
       since = options[:since]
-      lines = options[:lines]
+      lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
 
       on(MRSK.hosts) do |host|
         begin
@@ -122,16 +132,64 @@ class Mrsk::Cli::App < Mrsk::Cli::Base
   end
 
   desc "remove", "Remove app containers and images from servers"
-  option :only, default: "", desc: "Use 'containers' or 'images'"
   def remove
-    case options[:only]
-    when "containers"
-      on(MRSK.hosts) { execute *MRSK.app.remove_containers }
-    when "images"
-      on(MRSK.hosts) { execute *MRSK.app.remove_images }
-    else
-      on(MRSK.hosts) { execute *MRSK.app.remove_containers }
-      on(MRSK.hosts) { execute *MRSK.app.remove_images }
+    remove_containers
+    remove_images
+  end
+
+  desc "remove_container [VERSION]", "Remove app container with given version from servers"
+  def remove_container(version)
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("app remove container #{version}"), verbosity: :debug
+      execute *MRSK.app.remove_container(version: version)
     end
   end
+
+  desc "remove_containers", "Remove all app containers from servers"
+  def remove_containers
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("app remove containers"), verbosity: :debug
+      execute *MRSK.app.remove_containers
+    end
+  end
+
+  desc "remove_images", "Remove all app images from servers"
+  def remove_images
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("app remove images"), verbosity: :debug
+      execute *MRSK.app.remove_images
+    end
+  end
+
+  desc "current_version", "Shows the version currently running"
+  def current_version
+    on(MRSK.hosts) { |host| puts_by_host host, capture_with_info(*MRSK.app.current_running_version).strip }
+  end
+
+  private
+    def using_version(new_version)
+      if new_version
+        begin
+          old_version = MRSK.config.version
+          MRSK.config.version = new_version
+          yield new_version
+        ensure
+          MRSK.config.version = old_version
+        end
+      else
+        yield MRSK.config.version
+      end
+    end
+
+    def most_recent_version_available(host: MRSK.primary_host)
+      version = nil
+      on(host) { version = capture_with_info(*MRSK.app.most_recent_version_from_available_images).strip }
+      version.presence
+    end
+
+    def current_running_version(host: MRSK.primary_host)
+      version = nil
+      on(host) { version = capture_with_info(*MRSK.app.current_running_version).strip }
+      version.presence
+    end
 end

lib/mrsk/cli/base.rb

@@ -1,4 +1,5 @@
 require "thor"
+require "dotenv"
 require "mrsk/sshkit_with_ext"
 
 module Mrsk::Cli
@@ -8,6 +9,7 @@ module Mrsk::Cli
     def self.exit_on_failure?() true end
 
     class_option :verbose, type: :boolean, aliases: "-v", desc: "Detailed logging"
+    class_option :quiet, type: :boolean, aliases: "-q", desc: "Minimal logging"
 
     class_option :version, desc: "Run commands against a specific app version"
 
@@ -20,20 +22,37 @@ module Mrsk::Cli
 
     def initialize(*)
       super
+      load_envs
       initialize_commander(options)
     end
 
     private
+      def load_envs
+        if destination = options[:destination]
+          Dotenv.load(".env.#{destination}", ".env")
+        else
+          Dotenv.load(".env")
+        end
+      end
+
       def initialize_commander(options)
         MRSK.tap do |commander|
           commander.config_file = Pathname.new(File.expand_path(options[:config_file]))
           commander.destination = options[:destination]
-          commander.verbose     = options[:verbose]
           commander.version     = options[:version]
 
           commander.specific_hosts    = options[:hosts]&.split(",")
           commander.specific_roles    = options[:roles]&.split(",")
           commander.specific_primary! if options[:primary]
+
+          if options[:verbose]
+            ENV["VERBOSE"] = "1" # For backtraces via cli/start
+            commander.verbosity = :debug
+          end
+
+          if options[:quiet]
+            commander.verbosity = :error
+          end
         end
       end
 

lib/mrsk/cli/build.rb

@@ -1,5 +1,3 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::Build < Mrsk::Cli::Base
   desc "deliver", "Deliver a newly built app image to servers"
   def deliver
@@ -9,18 +7,17 @@ class Mrsk::Cli::Build < Mrsk::Cli::Base
 
   desc "push", "Build locally and push app image to registry"
   def push
-    verbose = options[:verbose]
     cli = self
 
     run_locally do
       begin
-        MRSK.verbosity(:debug) { execute *MRSK.builder.push }
+        MRSK.with_verbosity(:debug) { execute *MRSK.builder.push }
       rescue SSHKit::Command::Failed => e
         if e.message =~ /(no builder)|(no such file or directory)/
           error "Missing compatible builder, so creating a new one first"
 
           if cli.create
-            MRSK.verbosity(:debug) { execute *MRSK.builder.push }
+            MRSK.with_verbosity(:debug) { execute *MRSK.builder.push }
           end
         else
           raise
@@ -31,7 +28,10 @@ class Mrsk::Cli::Build < Mrsk::Cli::Base
 
   desc "pull", "Pull app image from the registry onto servers"
   def pull
-    on(MRSK.hosts) { execute *MRSK.builder.pull }
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("build pull image #{MRSK.version}"), verbosity: :debug
+      execute *MRSK.builder.pull
+    end
   end
 
   desc "create", "Create a local build setup"

lib/mrsk/cli/main.rb

@@ -1,13 +1,3 @@
-require "mrsk/cli/base"
-
-require "mrsk/cli/accessory"
-require "mrsk/cli/app"
-require "mrsk/cli/build"
-require "mrsk/cli/prune"
-require "mrsk/cli/registry"
-require "mrsk/cli/server"
-require "mrsk/cli/traefik"
-
 class Mrsk::Cli::Main < Mrsk::Cli::Base
   desc "setup", "Setup all accessories and deploy the app to servers"
   def setup
@@ -21,12 +11,21 @@ class Mrsk::Cli::Main < Mrsk::Cli::Base
   desc "deploy", "Deploy the app to servers"
   def deploy
     print_runtime do
+      say "Ensure Docker is installed...", :magenta
       invoke "mrsk:cli:server:bootstrap"
+
+      say "Log into image registry...", :magenta
       invoke "mrsk:cli:registry:login"
+
+      say "Build and push app image...", :magenta
       invoke "mrsk:cli:build:deliver"
+
+      say "Ensure Traefik is running...", :magenta
       invoke "mrsk:cli:traefik:boot"
-      invoke "mrsk:cli:app:stop"
+
       invoke "mrsk:cli:app:boot"
+
+      say "Prune old containers and images...", :magenta
       invoke "mrsk:cli:prune:all"
     end
   end
@@ -34,17 +33,23 @@ class Mrsk::Cli::Main < Mrsk::Cli::Base
   desc "redeploy", "Deploy new version of the app to servers (without bootstrapping servers, starting Traefik, pruning, and registry login)"
   def redeploy
     print_runtime do
+      say "Build and push app image...", :magenta
       invoke "mrsk:cli:build:deliver"
-      invoke "mrsk:cli:app:stop"
+
       invoke "mrsk:cli:app:boot"
     end
   end
 
-  desc "rollback [VERSION]", "Rollback the app to VERSION (that must already be on servers)"
+  desc "rollback [VERSION]", "Rollback the app to VERSION"
   def rollback(version)
+    MRSK.version = version
+
+    cli = self
+
+    cli.say "Stop current version, then start version #{version}...", :magenta
     on(MRSK.hosts) do
       execute *MRSK.app.stop, raise_on_non_zero_exit: false
-      execute *MRSK.app.start(version: version)
+      execute *MRSK.app.start
     end
   end
 
@@ -55,6 +60,13 @@ class Mrsk::Cli::Main < Mrsk::Cli::Base
     invoke "mrsk:cli:accessory:details", [ "all" ]
   end
 
+  desc "audit", "Show audit log from servers"
+  def audit
+    on(MRSK.hosts) do |host|
+      puts_by_host host, capture_with_info(*MRSK.auditor.reveal)
+    end
+  end
+
   desc "config", "Show combined config"
   def config
     run_locally do
@@ -62,22 +74,29 @@ class Mrsk::Cli::Main < Mrsk::Cli::Base
     end
   end
 
-  desc "install", "Create config stub in config/deploy.yml and binstub in bin/mrsk"
-  option :skip_binstub, type: :boolean, default: false, desc: "Skip adding MRSK to the Gemfile and creating bin/mrsk binstub"
-  def install
+  desc "init", "Create config stub in config/deploy.yml and env stub in .env"
+  option :bundle, type: :boolean, default: false, desc: "Add MRSK to the Gemfile and create a bin/mrsk binstub"
+  def init
     require "fileutils"
 
     if (deploy_file = Pathname.new(File.expand_path("config/deploy.yml"))).exist?
       puts "Config file already exists in config/deploy.yml (remove first to create a new one)"
     else
+      FileUtils.mkdir_p deploy_file.dirname
       FileUtils.cp_r Pathname.new(File.expand_path("templates/deploy.yml", __dir__)), deploy_file
       puts "Created configuration file in config/deploy.yml"
     end
 
-    unless options[:skip_binstub]
+    unless (deploy_file = Pathname.new(File.expand_path(".env"))).exist?
+      FileUtils.cp_r Pathname.new(File.expand_path("templates/template.env", __dir__)), deploy_file
+      puts "Created .env file"
+    end
+
+    if options[:bundle]
       if (binstub = Pathname.new(File.expand_path("bin/mrsk"))).exist?
         puts "Binstub already exists in bin/mrsk (remove first to create a new one)"
       else
+        puts "Adding MRSK to Gemfile and bundle..."
         `bundle add mrsk`
         `bundle binstubs mrsk`
         puts "Created binstub file in bin/mrsk"
@@ -85,6 +104,15 @@ class Mrsk::Cli::Main < Mrsk::Cli::Base
     end
   end
 
+  desc "envify", "Create .env by evaluating .env.erb (or .env.staging.erb -> .env.staging when using -d staging)"
+  def envify
+    if destination = options[:destination]
+      File.write(".env.#{destination}", ERB.new(IO.read(Pathname.new(File.expand_path(".env.#{destination}.erb")))).result)
+    else
+      File.write(".env", ERB.new(IO.read(Pathname.new(File.expand_path(".env.erb")))).result)
+    end
+  end
+
   desc "remove", "Remove Traefik, app, and registry session from servers"
   def remove
     invoke "mrsk:cli:traefik:remove"

lib/mrsk/cli/prune.rb

@@ -1,5 +1,3 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::Prune < Mrsk::Cli::Base
   desc "all", "Prune unused images and stopped containers"
   def all
@@ -9,11 +7,17 @@ class Mrsk::Cli::Prune < Mrsk::Cli::Base
 
   desc "images", "Prune unused images older than 30 days"
   def images
-    on(MRSK.hosts) { execute *MRSK.prune.images }
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("prune images"), verbosity: :debug
+      execute *MRSK.prune.images
+    end
   end
 
   desc "containers", "Prune stopped containers for the service older than 3 days"
   def containers
-    on(MRSK.hosts) { execute *MRSK.prune.containers }
+    on(MRSK.hosts) do
+      execute *MRSK.auditor.record("prune containers"), verbosity: :debug
+      execute *MRSK.prune.containers
+    end
   end
 end

lib/mrsk/cli/registry.rb

@@ -1,9 +1,7 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::Registry < Mrsk::Cli::Base
   desc "login", "Login to the registry locally and remotely"
   def login
-    run_locally           { execute *MRSK.registry.login }
+    run_locally    { execute *MRSK.registry.login }
     on(MRSK.hosts) { execute *MRSK.registry.login }
   rescue ArgumentError => e
     puts e.message

lib/mrsk/cli/server.rb

@@ -1,5 +1,3 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::Server < Mrsk::Cli::Base
   desc "bootstrap", "Ensure Docker is installed on the servers"
   def bootstrap

lib/mrsk/cli/templates/template.env

@@ -0,0 +1,2 @@
+MRSK_REGISTRY_PASSWORD=change-this
+RAILS_MASTER_KEY=another-env

lib/mrsk/cli/traefik.rb

@@ -1,5 +1,3 @@
-require "mrsk/cli/base"
-
 class Mrsk::Cli::Traefik < Mrsk::Cli::Base
   desc "boot", "Boot Traefik on servers"
   def boot
@@ -15,12 +13,18 @@ class Mrsk::Cli::Traefik < Mrsk::Cli::Base
 
   desc "start", "Start existing Traefik on servers"
   def start
-    on(MRSK.traefik_hosts) { execute *MRSK.traefik.start, raise_on_non_zero_exit: false }
+    on(MRSK.traefik_hosts) do
+      execute *MRSK.auditor.record("traefik start"), verbosity: :debug
+      execute *MRSK.traefik.start, raise_on_non_zero_exit: false
+    end
   end
 
   desc "stop", "Stop Traefik on servers"
   def stop
-    on(MRSK.traefik_hosts) { execute *MRSK.traefik.stop, raise_on_non_zero_exit: false }
+    on(MRSK.traefik_hosts) do
+      execute *MRSK.auditor.record("traefik stop"), verbosity: :debug
+      execute *MRSK.traefik.stop, raise_on_non_zero_exit: false
+    end
   end
 
   desc "restart", "Restart Traefik on servers"
@@ -50,7 +54,7 @@ class Mrsk::Cli::Traefik < Mrsk::Cli::Base
       end
     else
       since = options[:since]
-      lines = options[:lines]
+      lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set
 
       on(MRSK.traefik_hosts) do |host|
         puts_by_host host, capture(*MRSK.traefik.logs(since: since, lines: lines, grep: grep)), type: "Traefik"
@@ -67,11 +71,17 @@ class Mrsk::Cli::Traefik < Mrsk::Cli::Base
 
   desc "remove_container", "Remove Traefik container from servers"
   def remove_container
-    on(MRSK.traefik_hosts) { execute *MRSK.traefik.remove_container }
+    on(MRSK.traefik_hosts) do
+      execute *MRSK.auditor.record("traefik remove container"), verbosity: :debug
+      execute *MRSK.traefik.remove_container
+    end
   end
 
   desc "remove_container", "Remove Traefik image from servers"
   def remove_image
-    on(MRSK.traefik_hosts) { execute *MRSK.traefik.remove_image }
+    on(MRSK.traefik_hosts) do
+      execute *MRSK.auditor.record("traefik remove image"), verbosity: :debug
+      execute *MRSK.traefik.remove_image
+    end
   end
 end

lib/mrsk/commander.rb

@@ -1,18 +1,10 @@
 require "active_support/core_ext/enumerable"
 
-require "mrsk/configuration"
-require "mrsk/commands/accessory"
-require "mrsk/commands/app"
-require "mrsk/commands/builder"
-require "mrsk/commands/prune"
-require "mrsk/commands/traefik"
-require "mrsk/commands/registry"
-
 class Mrsk::Commander
-  attr_accessor :config_file, :destination, :verbose, :version
+  attr_accessor :config_file, :destination, :verbosity, :version
 
-  def initialize(config_file: nil, destination: nil, verbose: false)
-    @config_file, @destination, @verbose = config_file, destination, verbose
+  def initialize(config_file: nil, destination: nil, verbosity: :info)
+    @config_file, @destination, @verbosity = config_file, destination, verbosity
   end
 
   def config
@@ -77,24 +69,47 @@ class Mrsk::Commander
     Mrsk::Commands::Accessory.new(config, name: name)
   end
 
+  def auditor
+    @auditor ||= Mrsk::Commands::Auditor.new(config)
+  end
 
-  def verbosity(level) 
-    old_level = SSHKit.config.output_verbosity
+
+  def with_verbosity(level)
+    old_level = self.verbosity
+
+    self.verbosity = level
     SSHKit.config.output_verbosity = level
+
     yield
   ensure
+    self.verbosity = old_level
     SSHKit.config.output_verbosity = old_level
   end
 
+  # Test-induced damage!
+  def reset
+    @config = @config_file = @destination = @version = nil
+    @app = @builder = @traefik = @registry = @prune = @auditor = nil
+    @verbosity = :info
+  end
+
   private
     def cascading_version
-      version.presence || ENV["VERSION"] || `git rev-parse HEAD`.strip
+      version.presence || ENV["VERSION"] || current_commit_hash
+    end
+
+    def current_commit_hash
+      if system("git rev-parse")
+        `git rev-parse HEAD`.strip
+      else
+        raise "Can't use commit hash as version, no git repository found in #{Dir.pwd}"
+      end
     end
 
     # Lazy setup of SSHKit
     def configure_sshkit_with(config)
       SSHKit::Backend::Netssh.configure { |ssh| ssh.ssh_options = config.ssh_options }
       SSHKit.config.command_map[:docker] = "docker" # No need to use /usr/bin/env, just clogs up the logs
-      SSHKit.config.output_verbosity = :debug if verbose
+      SSHKit.config.output_verbosity = verbosity
     end
 end

lib/mrsk/commands/accessory.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/base"
-
 class Mrsk::Commands::Accessory < Mrsk::Commands::Base
   attr_reader :accessory_config
   delegate :service_name, :image, :host, :port, :files, :directories, :env_args, :volume_args, :label_args, to: :accessory_config
@@ -14,6 +12,7 @@ class Mrsk::Commands::Accessory < Mrsk::Commands::Base
       "--name", service_name,
       "-d",
       "--restart", "unless-stopped",
+      "--log-opt", "max-size=#{MAX_LOG_SIZE}",
       "-p", port,
       *env_args,
       *volume_args,
@@ -33,6 +32,7 @@ class Mrsk::Commands::Accessory < Mrsk::Commands::Base
     docker :ps, *service_filter
   end
 
+
   def logs(since: nil, lines: nil, grep: nil)
     pipe \
       docker(:logs, service_name, (" --since #{since}" if since), (" -n #{lines}" if lines), "-t", "2>&1"),
@@ -40,22 +40,21 @@ class Mrsk::Commands::Accessory < Mrsk::Commands::Base
   end
 
   def follow_logs(grep: nil)
-    run_over_ssh pipe(
-      docker(:logs, service_name, "-t", "-n", "10", "-f", "2>&1"),
-      ("grep '#{grep}'" if grep)
-    ).join(" "), host: host
+    run_over_ssh \
+      pipe \
+        docker(:logs, service_name, "-t", "-n", "10", "-f", "2>&1"),
+        (%(grep "#{grep}") if grep)
   end
 
-  def exec(*command, interactive: false)
+
+  def execute_in_existing_container(*command, interactive: false)
     docker :exec,
       ("-it" if interactive),
-      *env_args,
-      *volume_args,
       service_name,
       *command
   end
 
-  def run_exec(*command, interactive: false)
+  def execute_in_new_container(*command, interactive: false)
     docker :run,
       ("-it" if interactive),
       "--rm",
@@ -65,10 +64,19 @@ class Mrsk::Commands::Accessory < Mrsk::Commands::Base
       *command
   end
 
-  def bash(host:)
-    exec_over_ssh "bash", host: host
+  def execute_in_existing_container_over_ssh(*command)
+    run_over_ssh execute_in_existing_container(*command, interactive: true)
   end
 
+  def execute_in_new_container_over_ssh(*command)
+    run_over_ssh execute_in_new_container(*command, interactive: true)
+  end
+
+  def run_over_ssh(command)
+    super command, host: host
+  end
+
+
   def ensure_local_file_present(local_file)
     if !local_file.is_a?(StringIO) && !Pathname.new(local_file).exist?
       raise "Missing file: #{local_file}"
@@ -96,10 +104,6 @@ class Mrsk::Commands::Accessory < Mrsk::Commands::Base
   end
 
   private
-    def exec_over_ssh(*command, host:)
-      run_over_ssh run_exec(*command, interactive: true).join(" "), host: host
-    end
-
     def service_filter
       [ "--filter", "label=service=#{service_name}" ]
     end

lib/mrsk/commands/app.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/base"
-
 class Mrsk::Commands::App < Mrsk::Commands::Base
   def run(role: :web)
     role = config.role(role)
@@ -7,8 +5,8 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
     docker :run,
       "-d",
       "--restart unless-stopped",
-      "--name", config.service_with_version,
-      *rails_master_key_arg,
+      "--log-opt", "max-size=#{MAX_LOG_SIZE}",
+      "--name", service_with_version,
       *role.env_args,
       *config.volume_args,
       *role.label_args,
@@ -16,92 +14,119 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       role.cmd
   end
 
-  def start(version: config.version)
-    docker :start, "#{config.service}-#{version}"
-  end
-
-  def current_container_id
-    docker :ps, "-q", *service_filter
+  def start
+    docker :start, service_with_version
   end
 
   def stop
-    pipe current_container_id, "xargs docker stop"
+    pipe current_container_id, xargs(docker(:stop))
   end
 
   def info
     docker :ps, *service_filter
   end
 
+
   def logs(since: nil, lines: nil, grep: nil)
     pipe \
       current_container_id,
-      "xargs docker logs#{" --since #{since}" if since}#{" -n #{lines}" if lines} -t 2>&1",
+      "xargs docker logs#{" --since #{since}" if since}#{" -n #{lines}" if lines} 2>&1",
       ("grep '#{grep}'" if grep)
   end
 
-  def exec(*command, interactive: false)
+  def follow_logs(host:, grep: nil)
+    run_over_ssh \
+      pipe(
+        current_container_id,
+        "xargs docker logs -t -n 10 -f 2>&1",
+        (%(grep "#{grep}") if grep)
+      ),
+      host: host
+  end
+
+
+  def execute_in_existing_container(*command, interactive: false)
     docker :exec,
       ("-it" if interactive),
-      *rails_master_key_arg,
-      *config.env_args,
-      *config.volume_args,
       config.service_with_version,
       *command
   end
 
-  def run_exec(*command, interactive: false)
+  def execute_in_new_container(*command, interactive: false)
     docker :run,
       ("-it" if interactive),
       "--rm",
-      *rails_master_key_arg,
       *config.env_args,
       *config.volume_args,
       config.absolute_image,
       *command
   end
 
-  def exec_over_ssh(*command, host:)
-    run_over_ssh run_exec(*command, interactive: true).join(" "), host: host
+  def execute_in_existing_container_over_ssh(*command, host:)
+    run_over_ssh execute_in_existing_container(*command, interactive: true), host: host
   end
 
-  def follow_logs(host:, grep: nil)
-    run_over_ssh pipe(
-      current_container_id,
-      "xargs docker logs -t -n 10 -f 2>&1",
-      ("grep '#{grep}'" if grep)
-    ).join(" "), host: host
+  def execute_in_new_container_over_ssh(*command, host:)
+    run_over_ssh execute_in_new_container(*command, interactive: true), host: host
   end
 
-  def console(host:)
-    exec_over_ssh "bin/rails", "c", host: host
+
+  def current_container_id
+    docker :ps, "-q", *service_filter
   end
 
-  def bash(host:)
-    exec_over_ssh "bash", host: host
+  def container_id_for(container_name:)
+    docker :container, :ls, "-a", "-f", "name=#{container_name}", "-q"
   end
 
+  def current_running_version
+    # FIXME: Find more graceful way to extract the version from "app-version" than using sed and tail!
+    pipe \
+      docker(:ps, "--filter", "label=service=#{config.service}", "--format", '"{{.Names}}"'),
+      %(sed 's/-/\\n/g'),
+      "tail -n 1"
+  end
+
+  def most_recent_version_from_available_images
+    pipe \
+      docker(:image, :ls, "--format", '"{{.Tag}}"', config.repository),
+      "head -n 1"
+  end
+
+
   def list_containers
     docker :container, :ls, "-a", *service_filter
   end
 
+  def remove_container(version:)
+    pipe \
+      container_id_for(container_name: service_with_version(version)),
+      xargs(docker(:container, :rm))
+  end
+
   def remove_containers
     docker :container, :prune, "-f", *service_filter
   end
 
+  def list_images
+    docker :image, :ls, config.repository
+  end
+
   def remove_images
     docker :image, :prune, "-a", "-f", *service_filter
   end
 
+
   private
+    def service_with_version(version = nil)
+      if version
+        "#{config.service}-#{version}"
+      else
+        config.service_with_version
+      end
+    end
+
     def service_filter
       [ "--filter", "label=service=#{config.service}" ]
     end
-
-    def rails_master_key_arg
-      if master_key = config.master_key
-        [ "-e", redact("RAILS_MASTER_KEY=#{master_key}") ]
-      else
-        []
-      end
-    end
 end

lib/mrsk/commands/auditor.rb

@@ -0,0 +1,34 @@
+require "active_support/core_ext/time/conversions"
+
+class Mrsk::Commands::Auditor < Mrsk::Commands::Base
+  def record(line)
+    append \
+      [ :echo, tagged_line(line) ],
+      audit_log_file
+  end
+
+  def reveal
+    [ :tail, "-n", 50, audit_log_file ]
+  end
+
+  private
+    def audit_log_file
+      "mrsk-#{config.service}-audit.log"
+    end
+
+    def tagged_line(line)
+      "'#{tags} #{line}'"
+    end
+
+    def tags
+      "[#{timestamp}] [#{performer}]"
+    end
+
+    def performer
+      `whoami`.strip
+    end
+
+    def timestamp
+      Time.now.to_fs(:db)
+    end
+end

lib/mrsk/commands/base.rb

@@ -2,12 +2,21 @@ module Mrsk::Commands
   class Base
     delegate :redact, to: Mrsk::Utils
 
+    MAX_LOG_SIZE = "10m"
+
     attr_accessor :config
 
     def initialize(config)
       @config = config
     end
 
+    def run_over_ssh(*command, host:)
+      "ssh".tap do |cmd|
+        cmd << " -J #{config.ssh_proxy.jump_proxies}" if config.ssh_proxy
+        cmd << " -t #{config.ssh_user}@#{host} '#{command.join(" ")}'"
+      end
+    end
+
     private
       def combine(*commands, by: "&&")
         commands
@@ -24,12 +33,16 @@ module Mrsk::Commands
         combine *commands, by: "|"
       end
 
+      def append(*commands)
+        combine *commands, by: ">>"
+      end
+
+      def xargs(command)
+        [ :xargs, command ].flatten
+      end
+
       def docker(*args)
         args.compact.unshift :docker
       end
-
-      def run_over_ssh(command, host:)
-        "ssh -t #{config.ssh_user}@#{host} '#{command}'"
-      end
   end
 end

lib/mrsk/commands/builder.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/base"
-
 class Mrsk::Commands::Builder < Mrsk::Commands::Base
   delegate :create, :remove, :push, :pull, :info, to: :target
 
@@ -36,8 +34,3 @@ class Mrsk::Commands::Builder < Mrsk::Commands::Base
     @multiarch_remote ||= Mrsk::Commands::Builder::Multiarch::Remote.new(config)
   end
 end
-
-require "mrsk/commands/builder/native"
-require "mrsk/commands/builder/native/remote"
-require "mrsk/commands/builder/multiarch"
-require "mrsk/commands/builder/multiarch/remote"

lib/mrsk/commands/builder/base.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/base"
-
 class Mrsk::Commands::Builder::Base < Mrsk::Commands::Base
   delegate :argumentize, to: Mrsk::Utils
 
@@ -15,6 +13,10 @@ class Mrsk::Commands::Builder::Base < Mrsk::Commands::Base
     argumentize "--secret", secrets.collect { |secret| [ "id", secret ] }
   end
 
+  def build_tags
+    [ "-t", config.absolute_image, "-t", config.latest_image ]
+  end
+
   private
     def args
       (config.builder && config.builder["args"]) || {}

lib/mrsk/commands/builder/multiarch.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/builder/base"
-
 class Mrsk::Commands::Builder::Multiarch < Mrsk::Commands::Builder::Base
   def create
     docker :buildx, :create, "--use", "--name", builder_name
@@ -14,7 +12,7 @@ class Mrsk::Commands::Builder::Multiarch < Mrsk::Commands::Builder::Base
       "--push",
       "--platform", "linux/amd64,linux/arm64",
       "--builder", builder_name,
-      "-t", config.absolute_image,
+      *build_tags, 
       *build_args,
       *build_secrets,
       "."

lib/mrsk/commands/builder/multiarch/remote.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/builder/multiarch"
-
 class Mrsk::Commands::Builder::Multiarch::Remote < Mrsk::Commands::Builder::Multiarch
   def create
     combine \

lib/mrsk/commands/builder/native.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/builder/base"
-
 class Mrsk::Commands::Builder::Native < Mrsk::Commands::Builder::Base
   def create
     # No-op on native
@@ -11,7 +9,7 @@ class Mrsk::Commands::Builder::Native < Mrsk::Commands::Builder::Base
 
   def push
     combine \
-      docker(:build, "-t", *build_args, *build_secrets, config.absolute_image, "."),
+      docker(:build, *build_tags, *build_args, *build_secrets, "."),
       docker(:push, config.absolute_image)
   end
 

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

@@ -1,5 +1,3 @@
-require "mrsk/commands/builder/native"
-
 class Mrsk::Commands::Builder::Native::Remote < Mrsk::Commands::Builder::Native
   def create
     chain \
@@ -18,7 +16,7 @@ class Mrsk::Commands::Builder::Native::Remote < Mrsk::Commands::Builder::Native
       "--push",
       "--platform", platform,
       "--builder", builder_name,
-      "-t", config.absolute_image,
+      *build_tags,
       *build_args,
       *build_secrets,
       "."

lib/mrsk/commands/prune.rb

@@ -1,10 +1,9 @@
-require "mrsk/commands/base"
 require "active_support/duration"
 require "active_support/core_ext/numeric/time"
 
 class Mrsk::Commands::Prune < Mrsk::Commands::Base
-  PRUNE_IMAGES_AFTER     = 30.days.in_hours.to_i
-  PRUNE_CONTAINERS_AFTER =  3.days.in_hours.to_i
+  PRUNE_IMAGES_AFTER     = 7.days.in_hours.to_i
+  PRUNE_CONTAINERS_AFTER = 3.days.in_hours.to_i
 
   def images
     docker :image, :prune, "-f", "--filter", "until=#{PRUNE_IMAGES_AFTER}h"

lib/mrsk/commands/registry.rb

@@ -1,5 +1,3 @@
-require "mrsk/commands/base"
-
 class Mrsk::Commands::Registry < Mrsk::Commands::Base
   delegate :registry, to: :config
 

lib/mrsk/commands/traefik.rb

@@ -1,15 +1,15 @@
-require "mrsk/commands/base"
-
 class Mrsk::Commands::Traefik < Mrsk::Commands::Base
   def run
     docker :run, "--name traefik",
       "-d",
-      "--restart unless-stopped",
+      "--restart", "unless-stopped",
+      "--log-opt", "max-size=#{MAX_LOG_SIZE}",
       "-p 80:80",
       "-v /var/run/docker.sock:/var/run/docker.sock",
       "traefik",
       "--providers.docker",
-      "--log.level=DEBUG"
+      "--log.level=DEBUG",
+      *cmd_args
   end
 
   def start
@@ -33,7 +33,7 @@ class Mrsk::Commands::Traefik < Mrsk::Commands::Base
   def follow_logs(host:, grep: nil)
     run_over_ssh pipe(
       docker(:logs, "traefik", "-t", "-n", "10", "-f", "2>&1"),
-      ("grep '#{grep}'" if grep)
+      (%(grep "#{grep}") if grep)
     ).join(" "), host: host
   end
 
@@ -44,4 +44,9 @@ class Mrsk::Commands::Traefik < Mrsk::Commands::Base
   def remove_image
     docker :image, :prune, "-a", "-f", "--filter", "label=org.opencontainers.image.title=Traefik"
   end
+
+  private
+    def cmd_args
+      (config.raw_config.dig(:traefik, "args") || { }).collect { |(key, value)| [ "--#{key}", value ] }.flatten
+    end
 end

lib/mrsk/configuration.rb

@@ -3,12 +3,13 @@ require "active_support/core_ext/string/inquiry"
 require "active_support/core_ext/module/delegation"
 require "pathname"
 require "erb"
-require "mrsk/utils"
+require "net/ssh/proxy/jump"
 
 class Mrsk::Configuration
   delegate :service, :image, :servers, :env, :labels, :registry, :builder, to: :raw_config, allow_nil: true
   delegate :argumentize, :argumentize_env_with_secrets, to: Mrsk::Utils
 
+  attr_accessor :version
   attr_accessor :raw_config
 
   class << self
@@ -39,7 +40,7 @@ class Mrsk::Configuration
   def initialize(raw_config, version: "missing", validate: true)
     @raw_config = ActiveSupport::InheritableOptions.new(raw_config)
     @version = version
-    ensure_required_keys_present if validate
+    valid? if validate
   end
 
 
@@ -52,7 +53,7 @@ class Mrsk::Configuration
   end
 
   def accessories
-    @accessories ||= raw_config.accessories&.keys&.collect { |name| Mrsk::Configuration::Assessory.new(name, config: self) } || []
+    @accessories ||= raw_config.accessories&.keys&.collect { |name| Mrsk::Configuration::Accessory.new(name, config: self) } || []
   end
 
   def accessory(name)
@@ -73,10 +74,6 @@ class Mrsk::Configuration
   end
 
 
-  def version
-    @version
-  end
-
   def repository
     [ raw_config.registry["server"], image ].compact.join("/")
   end
@@ -85,6 +82,10 @@ class Mrsk::Configuration
     "#{repository}:#{version}"
   end
 
+  def latest_image
+    "#{repository}:latest"
+  end
+
   def service_with_version
     "#{service}-#{version}"
   end
@@ -107,19 +108,30 @@ class Mrsk::Configuration
   end
 
   def ssh_user
-    raw_config.ssh_user || "root"
+    if raw_config.ssh.present?
+      raw_config.ssh["user"] || "root"
+    else
+      "root"
+    end
+  end
+
+  def ssh_proxy
+    if raw_config.ssh.present? && raw_config.ssh["proxy"]
+      Net::SSH::Proxy::Jump.new \
+        raw_config.ssh["proxy"].include?("@") ? raw_config.ssh["proxy"] : "root@#{raw_config.ssh["proxy"]}"
+    end
   end
 
   def ssh_options
-    { user: ssh_user, auth_methods: [ "publickey" ] }
+    { user: ssh_user, proxy: ssh_proxy, auth_methods: [ "publickey" ] }.compact
   end
 
-  def master_key
-    unless raw_config.skip_master_key
-      ENV["RAILS_MASTER_KEY"] || File.read(Pathname.new(File.expand_path("config/master.key")))
-    end
+
+  def valid?
+    ensure_required_keys_present && ensure_env_available
   end
 
+
   def to_h
     {
       roles: role_names,
@@ -139,6 +151,7 @@ class Mrsk::Configuration
 
 
   private
+    # Will raise ArgumentError if any required config keys are missing
     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?
@@ -151,12 +164,19 @@ class Mrsk::Configuration
       if raw_config.registry["password"].blank?
         raise ArgumentError, "You must specify a password for the registry in config/deploy.yml (or set the ENV variable if that's used)"
       end
+
+      true
+    end
+
+    # Will raise KeyError if any secret ENVs are missing
+    def ensure_env_available
+      env_args
+      roles.each(&:env_args)
+
+      true
     end
 
     def role_names
       raw_config.servers.is_a?(Array) ? [ "web" ] : raw_config.servers.keys.sort
     end
 end
-
-require "mrsk/configuration/role"
-require "mrsk/configuration/accessory"

lib/mrsk/configuration/accessory.rb

@@ -1,4 +1,4 @@
-class Mrsk::Configuration::Assessory
+class Mrsk::Configuration::Accessory
   delegate :argumentize, :argumentize_env_with_secrets, to: Mrsk::Utils
 
   attr_accessor :name, :specifics
@@ -74,12 +74,19 @@ class Mrsk::Configuration::Assessory
 
     def expand_local_file(local_file)
       if local_file.end_with?("erb")
-        read_dynamic_file(local_file)
+        with_clear_env_loaded { read_dynamic_file(local_file) }
       else
         Pathname.new(File.expand_path(local_file)).to_s
       end
     end
 
+    def with_clear_env_loaded
+      (env["clear"] || env).each { |k, v| ENV[k] = v }
+      yield
+    ensure
+      (env["clear"] || env).each { |k, v| ENV.delete(k) }
+    end
+
     def read_dynamic_file(local_file)
       StringIO.new(ERB.new(IO.read(local_file)).result)
     end

lib/mrsk/configuration/role.rb

@@ -96,7 +96,12 @@ class Mrsk::Configuration::Role
     def merged_env_with_secrets
       merged_env.tap do |new_env|
         new_env["secret"] = Array(config.env["secret"]) + Array(specialized_env["secret"])
-        new_env["clear"]  = (Array(config.env["clear"] || config.env) + Array(specialized_env["clear"] || specialized_env)).uniq
+
+        # 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
 end

lib/mrsk/utils.rb

@@ -18,7 +18,7 @@ module Mrsk::Utils
     if (secrets = env["secret"]).present?
       argumentize("-e", secrets.to_h { |key| [ key, ENV.fetch(key) ] }, redacted: true) + argumentize("-e", env["clear"])
     else
-      argumentize "-e", env
+      argumentize "-e", env.fetch("clear", env)
     end
   end
 

lib/mrsk/version.rb

@@ -1,3 +1,3 @@
 module Mrsk
-  VERSION = "0.3.1"
+  VERSION = "0.6.2"
 end

mrsk.gemspec

@@ -6,7 +6,7 @@ Gem::Specification.new do |spec|
   spec.authors     = [ "David Heinemeier Hansson" ]
   spec.email       = "dhh@hey.com"
   spec.homepage    = "https://github.com/rails/mrsk"
-  spec.summary     = "Deploy Rails apps in containers to servers running Docker with zero downtime."
+  spec.summary     = "Deploy web apps in containers to servers running Docker with zero downtime."
   spec.license     = "MIT"
 
   spec.files = Dir["lib/**/*", "MIT-LICENSE", "README.md"]
@@ -15,4 +15,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency "activesupport", ">= 7.0"
   spec.add_dependency "sshkit", "~> 1.21"
   spec.add_dependency "thor", "~> 1.2"
+  spec.add_dependency "dotenv", "~> 2.8"
+  spec.add_dependency "zeitwerk", "~> 2.5"
 end

test/cli/accessory_test.rb

@@ -1,34 +1,38 @@
-require "test_helper"
-require "active_support/testing/stream"
-require "mrsk/cli"
-
-class CliAccessoryTest < ActiveSupport::TestCase
-  include ActiveSupport::Testing::Stream
-
-  setup    { ENV["MYSQL_ROOT_PASSWORD"] = "secret123" }
-  teardown { ENV["MYSQL_ROOT_PASSWORD"] = nil }
+require_relative "cli_test_case"
 
+class CliAccessoryTest < CliTestCase
   test "upload" do
-    command = stdouted { Mrsk::Cli::Accessory.start(["upload", "mysql", "-c", "test/fixtures/deploy_with_accessories.yml"]) }
-    
-    assert_match "test/fixtures/files/my.cnf app-mysql/etc/mysql/my.cnf", command
+    assert_match "test/fixtures/files/my.cnf app-mysql/etc/mysql/my.cnf", run_command("upload", "mysql")
   end
 
   test "directories" do
-    command = stdouted { Mrsk::Cli::Accessory.start(["directories", "mysql", "-c", "test/fixtures/deploy_with_accessories.yml"]) }
-    
-    assert_match "mkdir -p $PWD/app-mysql/data", command
+    assert_match "mkdir -p $PWD/app-mysql/data", run_command("directories", "mysql")
   end
 
   test "remove service direcotry" do
-    command = stdouted { Mrsk::Cli::Accessory.start(["remove_service_directory", "mysql", "-c", "test/fixtures/deploy_with_accessories.yml"]) }
-    
-    assert_match "rm -rf app-mysql", command
+    assert_match "rm -rf app-mysql", run_command("remove_service_directory", "mysql")
   end
 
   test "boot" do
-    command = stdouted { Mrsk::Cli::Accessory.start(["boot", "mysql", "-c", "test/fixtures/deploy_with_accessories.yml"]) }
-    
-    assert_match "Running docker run --name app-mysql -d --restart unless-stopped -p 3306:3306 -e [REDACTED] -e 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", command
+    assert_match "Running docker run --name app-mysql -d --restart unless-stopped --log-opt max-size=10m -p 3306:3306 -e [REDACTED] -e 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", run_command("boot", "mysql")
   end
+
+  test "exec" do
+    run_command("exec", "mysql", "mysql -v").tap do |output|
+      assert_match /Launching command from new container/, output
+      assert_match /mysql -v/, output
+    end
+  end
+
+  test "exec with reuse" do
+    run_command("exec", "mysql", "--reuse", "mysql -v").tap do |output|
+      assert_match /Launching command from existing container/, output
+      assert_match %r[docker exec app-mysql mysql -v], output
+    end
+  end
+
+  private
+    def run_command(*command)
+      stdouted { Mrsk::Cli::Accessory.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+    end
 end

test/cli/app_test.rb

@@ -0,0 +1,67 @@
+require_relative "cli_test_case"
+
+class CliAppTest < CliTestCase
+  test "boot" do
+    assert_match /Running docker run -d --restart unless-stopped/, run_command("boot")
+  end
+
+  test "boot will reboot if same version is already running" do
+    run_command("details") # Preheat MRSK const
+
+    # Prevent expected failures from outputting to terminal
+    Thread.report_on_exception = false
+
+    MRSK.app.stubs(:run).raises(SSHKit::Command::Failed.new("already in use")).then.returns([ :docker, :run ])
+
+    run_command("boot").tap do |output|
+      assert_match /Rebooting container with same version already deployed/, output # Can't start what's already running
+      assert_match /docker ps -q --filter label=service=app \| xargs docker stop/, output # Stop what's running
+      assert_match /docker container ls -a -f name=app-999 -q \| xargs docker container rm/, output # Remove old container
+      assert_match /docker run/, output # Start new container
+    end
+  ensure
+    Thread.report_on_exception = true
+  end
+
+  test "start" do
+    run_command("start").tap do |output|
+      assert_match /docker start app-999/, output
+    end
+  end
+
+  test "stop" do
+    run_command("stop").tap do |output|
+      assert_match /docker ps -q --filter label=service=app \| xargs docker stop/, output
+    end
+  end
+
+  test "details" do
+    run_command("details").tap do |output|
+      assert_match /docker ps --filter label=service=app/, output
+    end
+  end
+
+  test "remove_container" do
+    run_command("remove_container", "1234567").tap do |output|
+      assert_match /docker container ls -a -f name=app-1234567 -q \| xargs docker container rm/, output
+    end
+  end
+
+  test "exec" do
+    run_command("exec", "ruby -v").tap do |output|
+      assert_match /ruby -v/, output
+    end
+  end
+
+  test "exec with reuse" do
+    run_command("exec", "--reuse", "ruby -v").tap do |output|
+      assert_match %r[docker ps --filter label=service=app --format \"{{.Names}}\" | sed 's/-/\\n/g' | tail -n 1], output # Get current version
+      assert_match %r[docker exec app-999 ruby -v], output
+    end
+  end
+
+  private
+    def run_command(*command)
+      stdouted { Mrsk::Cli::App.start([*command, "-c", "test/fixtures/deploy_with_accessories.yml"]) }
+    end
+end

test/cli/cli_test_case.rb

@@ -0,0 +1,24 @@
+require "test_helper"
+require "active_support/testing/stream"
+
+class CliTestCase < ActiveSupport::TestCase
+  include ActiveSupport::Testing::Stream
+
+  setup do
+    ENV["VERSION"]             = "999"
+    ENV["RAILS_MASTER_KEY"]    = "123"
+    ENV["MYSQL_ROOT_PASSWORD"] = "secret123"
+  end
+
+  teardown do
+    ENV.delete("RAILS_MASTER_KEY")
+    ENV.delete("MYSQL_ROOT_PASSWORD")
+    ENV.delete("VERSION")
+    MRSK.reset
+  end
+
+  private
+    def stdouted
+      capture(:stdout) { yield }.strip
+    end
+end

test/cli/main_test.rb

@@ -1,13 +1,6 @@
-require "test_helper"
-require "active_support/testing/stream"
-require "mrsk/cli"
-
-class CliMainTest < ActiveSupport::TestCase
-  include ActiveSupport::Testing::Stream
-
-  setup do
-  end
+require_relative "cli_test_case"
 
+class CliMainTest < CliTestCase
   test "version" do
     version = stdouted { Mrsk::Cli::Main.new.version }
     assert_equal Mrsk::VERSION, version

test/commander_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "mrsk/commander"
 
 class CommanderTest < ActiveSupport::TestCase
   setup do
@@ -10,6 +9,16 @@ class CommanderTest < ActiveSupport::TestCase
     assert_equal Mrsk::Configuration, @mrsk.config.class
   end
 
+  test "commit hash as version" do
+    assert_equal `git rev-parse HEAD`.strip, @mrsk.config.version
+  end
+
+  test "commit hash as version but not in git" do
+    @mrsk.expects(:system).with("git rev-parse").returns(nil)
+    error = assert_raises(RuntimeError) { @mrsk.config }
+    assert_match /no git repository found/, error.message
+  end
+
   test "overwriting hosts" do
     assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3", "1.1.1.4" ], @mrsk.hosts
 

test/commands/accessory_test.rb

@@ -1,6 +1,4 @@
 require "test_helper"
-require "mrsk/configuration"
-require "mrsk/commands/accessory"
 
 class CommandsAccessoryTest < ActiveSupport::TestCase
   setup do
@@ -41,46 +39,96 @@ class CommandsAccessoryTest < ActiveSupport::TestCase
     @config = Mrsk::Configuration.new(@config)
     @mysql  = Mrsk::Commands::Accessory.new(@config, name: :mysql)
     @redis  = Mrsk::Commands::Accessory.new(@config, name: :redis)
+
+    ENV["MYSQL_ROOT_PASSWORD"] = "secret123"
+  end
+
+  teardown do
+    ENV.delete("MYSQL_ROOT_PASSWORD")
   end
 
   test "run" do
-    ENV["MYSQL_ROOT_PASSWORD"] = "secret123"
+    assert_equal \
+      "docker run --name app-mysql -d --restart unless-stopped --log-opt max-size=10m -p 3306:3306 -e MYSQL_ROOT_PASSWORD=secret123 -e MYSQL_ROOT_HOST=% --label service=app-mysql mysql:8.0",
+      @mysql.run.join(" ")
 
     assert_equal \
-      [:docker, :run, "--name", "app-mysql", "-d", "--restart", "unless-stopped", "-p", "3306:3306", "-e", "MYSQL_ROOT_PASSWORD=secret123", "-e", "MYSQL_ROOT_HOST=%", "--label", "service=app-mysql", "mysql:8.0"], @mysql.run
-
-    assert_equal \
-      [:docker, :run, "--name", "app-redis", "-d", "--restart", "unless-stopped", "-p", "6379:6379", "-e", "SOMETHING=else", "--volume", "/var/lib/redis:/data", "--label", "service=app-redis", "--label", "cache=true", "redis:latest"], @redis.run
-  ensure
-    ENV["MYSQL_ROOT_PASSWORD"] = nil
+      "docker run --name app-redis -d --restart unless-stopped --log-opt max-size=10m -p 6379:6379 -e SOMETHING=else --volume /var/lib/redis:/data --label service=app-redis --label cache=true redis:latest",
+      @redis.run.join(" ")
   end
 
   test "start" do
-    assert_equal [:docker, :container, :start, "app-mysql"], @mysql.start
+    assert_equal \
+      "docker container start app-mysql",
+      @mysql.start.join(" ")
   end
 
   test "stop" do
-    assert_equal [:docker, :container, :stop, "app-mysql"], @mysql.stop
+    assert_equal \
+      "docker container stop app-mysql",
+      @mysql.stop.join(" ")
   end
 
   test "info" do
-    assert_equal [:docker, :ps, "--filter", "label=service=app-mysql"], @mysql.info
+    assert_equal \
+      "docker ps --filter label=service=app-mysql",
+      @mysql.info.join(" ")
   end
 
+
+  test "execute in new container" do
+    assert_equal \
+      "docker run --rm -e MYSQL_ROOT_PASSWORD=secret123 -e MYSQL_ROOT_HOST=% mysql:8.0 mysql -u root",
+      @mysql.execute_in_new_container("mysql", "-u", "root").join(" ")
+  end
+
+  test "execute in existing container" do
+    assert_equal \
+      "docker exec app-mysql mysql -u root",
+      @mysql.execute_in_existing_container("mysql", "-u", "root").join(" ")
+  end
+
+  test "execute in new container over ssh" do
+    @mysql.stub(:run_over_ssh, ->(cmd) { cmd.join(" ") }) do
+      assert_match %r|docker run -it --rm -e MYSQL_ROOT_PASSWORD=secret123 -e MYSQL_ROOT_HOST=% mysql:8.0 mysql -u root|,
+        @mysql.execute_in_new_container_over_ssh("mysql", "-u", "root")
+    end
+  end
+
+  test "execute in existing container over ssh" do
+    @mysql.stub(:run_over_ssh, ->(cmd) { cmd.join(" ") }) do
+      assert_match %r|docker exec -it app-mysql mysql -u root|,
+        @mysql.execute_in_existing_container_over_ssh("mysql", "-u", "root")
+    end
+  end
+
+
+
   test "logs" do
-    assert_equal [:docker, :logs, "app-mysql", "-t", "2>&1"], @mysql.logs
-    assert_equal [:docker, :logs, "app-mysql", " --since 5m", " -n 100", "-t", "2>&1", "|", "grep 'thing'"], @mysql.logs(since: "5m", lines: 100, grep: "thing")
+    assert_equal \
+      "docker logs app-mysql -t 2>&1",
+      @mysql.logs.join(" ")
+
+    assert_equal \
+      "docker logs app-mysql  --since 5m  -n 100 -t 2>&1 | grep 'thing'",
+      @mysql.logs(since: "5m", lines: 100, grep: "thing").join(" ")
   end
 
   test "follow logs" do
-    assert_equal "ssh -t root@1.1.1.5 'docker logs app-mysql -t -n 10 -f 2>&1'", @mysql.follow_logs
+    assert_equal \
+      "ssh -t root@1.1.1.5 'docker logs app-mysql -t -n 10 -f 2>&1'",
+      @mysql.follow_logs
   end
 
   test "remove container" do
-    assert_equal [:docker, :container, :prune, "-f", "--filter", "label=service=app-mysql"], @mysql.remove_container
+    assert_equal \
+      "docker container prune -f --filter label=service=app-mysql",
+      @mysql.remove_container.join(" ")
   end
 
   test "remove image" do
-    assert_equal [:docker, :image, :prune, "-a", "-f", "--filter", "label=service=app-mysql"], @mysql.remove_image
+    assert_equal \
+      "docker image prune -a -f --filter label=service=app-mysql",
+      @mysql.remove_image.join(" ")
   end
 end

test/commands/app_test.rb

@@ -1,41 +1,161 @@
 require "test_helper"
-require "mrsk/configuration"
-require "mrsk/commands/app"
 
 class CommandsAppTest < ActiveSupport::TestCase
   setup do
     ENV["RAILS_MASTER_KEY"] = "456"
 
-    @config = { service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ] }
-    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config)
+    @config = { service: "app", image: "dhh/app", registry: { "username" => "dhh", "password" => "secret" }, servers: [ "1.1.1.1" ], env: { "secret" => [ "RAILS_MASTER_KEY" ] } }
+    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config).tap { |c| c.version = "999" }
   end
 
   teardown do
-    ENV["RAILS_MASTER_KEY"] = nil
+    ENV.delete("RAILS_MASTER_KEY")
   end
 
   test "run" do
     assert_equal \
-      [:docker, :run, "-d", "--restart unless-stopped", "--name", "app-missing", "-e", "RAILS_MASTER_KEY=456", "--label", "service=app", "--label", "role=web", "--label", "traefik.http.routers.app.rule='PathPrefix(`/`)'", "--label", "traefik.http.services.app.loadbalancer.healthcheck.path=/up", "--label", "traefik.http.services.app.loadbalancer.healthcheck.interval=1s", "--label", "traefik.http.middlewares.app.retry.attempts=3", "--label", "traefik.http.middlewares.app.retry.initialinterval=500ms", "dhh/app:missing"], @app.run
+      "docker run -d --restart unless-stopped --log-opt max-size=10m --name app-999 -e RAILS_MASTER_KEY=456 --label service=app --label role=web --label traefik.http.routers.app.rule='PathPrefix(`/`)' --label traefik.http.services.app.loadbalancer.healthcheck.path=/up --label traefik.http.services.app.loadbalancer.healthcheck.interval=1s --label traefik.http.middlewares.app.retry.attempts=3 --label traefik.http.middlewares.app.retry.initialinterval=500ms dhh/app:999",
+      @app.run.join(" ")
   end
 
   test "run with volumes" do
     @config[:volumes] = ["/local/path:/container/path" ]
 
     assert_equal \
-      [:docker, :run, "-d", "--restart unless-stopped", "--name", "app-missing", "-e", "RAILS_MASTER_KEY=456", "--volume", "/local/path:/container/path", "--label", "service=app", "--label", "role=web", "--label", "traefik.http.routers.app.rule='PathPrefix(`/`)'", "--label", "traefik.http.services.app.loadbalancer.healthcheck.path=/up", "--label", "traefik.http.services.app.loadbalancer.healthcheck.interval=1s", "--label", "traefik.http.middlewares.app.retry.attempts=3", "--label", "traefik.http.middlewares.app.retry.initialinterval=500ms", "dhh/app:missing"], @app.run
+      "docker run -d --restart unless-stopped --log-opt max-size=10m --name app-999 -e RAILS_MASTER_KEY=456 --volume /local/path:/container/path --label service=app --label role=web --label traefik.http.routers.app.rule='PathPrefix(`/`)' --label traefik.http.services.app.loadbalancer.healthcheck.path=/up --label traefik.http.services.app.loadbalancer.healthcheck.interval=1s --label traefik.http.middlewares.app.retry.attempts=3 --label traefik.http.middlewares.app.retry.initialinterval=500ms dhh/app:999",
+      @app.run.join(" ")
   end
 
-  test "run with" do
+  test "start" do
     assert_equal \
-      [ :docker, :run, "--rm", "-e", "RAILS_MASTER_KEY=456", "dhh/app:missing", "bin/rails", "db:setup" ],
-      @app.run_exec("bin/rails", "db:setup")
+      "docker start app-999",
+      @app.start.join(" ")
   end
 
-  test "run without master key" do
-    ENV["RAILS_MASTER_KEY"] = nil
-    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config.tap { |c| c[:skip_master_key] = true })
+  test "stop" do
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker stop",
+      @app.stop.join(" ")
+  end
 
-    assert @app.run.exclude?("RAILS_MASTER_KEY=456")
+  test "info" do
+    assert_equal \
+      "docker ps --filter label=service=app",
+      @app.info.join(" ")
+  end
+
+
+  test "logs" do
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker logs 2>&1",
+      @app.logs.join(" ")
+
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker logs --since 5m 2>&1",
+      @app.logs(since: "5m").join(" ")
+
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker logs -n 100 2>&1",
+      @app.logs(lines: "100").join(" ")
+
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker logs --since 5m -n 100 2>&1",
+      @app.logs(since: "5m", lines: "100").join(" ")
+
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker logs 2>&1 | grep 'my-id'",
+      @app.logs(grep: "my-id").join(" ")
+
+    assert_equal \
+      "docker ps -q --filter label=service=app | xargs docker logs --since 5m 2>&1 | grep 'my-id'",
+      @app.logs(since: "5m", grep: "my-id").join(" ")
+  end
+
+  test "follow logs" do
+    @app.stub(:run_over_ssh, ->(cmd, host:) { cmd.join(" ") }) do
+      assert_equal \
+        "docker ps -q --filter label=service=app | xargs docker logs -t -n 10 -f 2>&1",
+        @app.follow_logs(host: "app-1")
+
+      assert_equal \
+        "docker ps -q --filter label=service=app | xargs docker logs -t -n 10 -f 2>&1 | grep \"Completed\"",
+        @app.follow_logs(host: "app-1", grep: "Completed")
+    end
+  end
+
+
+  test "execute in new container" do
+    assert_equal \
+      "docker run --rm -e RAILS_MASTER_KEY=456 dhh/app:999 bin/rails db:setup",
+      @app.execute_in_new_container("bin/rails", "db:setup").join(" ")
+  end
+
+  test "execute in existing container" do
+    assert_equal \
+      "docker exec app-999 bin/rails db:setup",
+      @app.execute_in_existing_container("bin/rails", "db:setup").join(" ")
+  end
+
+  test "execute in new container over ssh" do
+    @app.stub(:run_over_ssh, ->(cmd, host:) { cmd.join(" ") }) do
+      assert_match %r|docker run -it --rm -e RAILS_MASTER_KEY=456 dhh/app:999 bin/rails c|,
+        @app.execute_in_new_container_over_ssh("bin/rails", "c", host: "app-1")
+    end
+  end
+
+  test "execute in existing container over ssh" do
+    @app.stub(:run_over_ssh, ->(cmd, host:) { cmd.join(" ") }) do
+      assert_match %r|docker exec -it app-999 bin/rails c|,
+        @app.execute_in_existing_container_over_ssh("bin/rails", "c", host: "app-1")
+    end
+  end
+
+  test "run over ssh" do
+    assert_equal "ssh -t root@1.1.1.1 'ls'", @app.run_over_ssh("ls", host: "1.1.1.1")
+  end
+
+  test "run over ssh with custom user" do
+    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config.tap { |c| c[:ssh] = { "user" => "app" } })
+    assert_equal "ssh -t app@1.1.1.1 'ls'", @app.run_over_ssh("ls", host: "1.1.1.1")
+  end
+
+  test "run over ssh with proxy" do
+    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config.tap { |c| c[:ssh] = { "proxy" => "2.2.2.2" } })
+    assert_equal "ssh -J root@2.2.2.2 -t root@1.1.1.1 'ls'", @app.run_over_ssh("ls", host: "1.1.1.1")
+  end
+
+  test "run over ssh with proxy user" do
+    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config.tap { |c| c[:ssh] = { "proxy" => "app@2.2.2.2" } })
+    assert_equal "ssh -J app@2.2.2.2 -t root@1.1.1.1 'ls'", @app.run_over_ssh("ls", host: "1.1.1.1")
+  end
+
+  test "run over ssh with custom user with proxy" do
+    @app = Mrsk::Commands::App.new Mrsk::Configuration.new(@config.tap { |c| c[:ssh] = { "user" => "app", "proxy" => "2.2.2.2" } })
+    assert_equal "ssh -J root@2.2.2.2 -t app@1.1.1.1 'ls'", @app.run_over_ssh("ls", host: "1.1.1.1")
+  end
+
+
+  test "current_container_id" do
+    assert_equal \
+      "docker ps -q --filter label=service=app",
+      @app.current_container_id.join(" ")
+  end
+
+  test "container_id_for" do
+    assert_equal \
+      "docker container ls -a -f name=app-999 -q",
+      @app.container_id_for(container_name: "app-999").join(" ")
+  end
+
+  test "current_running_version" do
+    assert_equal \
+      "docker ps --filter label=service=app --format \"{{.Names}}\" | sed 's/-/\\n/g' | tail -n 1",
+      @app.current_running_version.join(" ")
+  end
+
+  test "most_recent_version_from_available_images" do
+    assert_equal \
+      "docker image ls --format \"{{.Tag}}\" dhh/app | head -n 1",
+      @app.most_recent_version_from_available_images.join(" ")
   end
 end

test/commands/builder_test.rb

@@ -1,6 +1,4 @@
 require "test_helper"
-require "mrsk/configuration"
-require "mrsk/commands/builder"
 
 class CommandsBuilderTest < ActiveSupport::TestCase
   setup do
@@ -10,25 +8,25 @@ class CommandsBuilderTest < ActiveSupport::TestCase
   test "target multiarch by default" do
     builder = new_builder_command
     assert_equal "multiarch", builder.name
-    assert_equal [:docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "mrsk-app-multiarch", "-t", "dhh/app:123", "."], builder.push
+    assert_equal [:docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "mrsk-app-multiarch", "-t", "dhh/app:123", "-t", "dhh/app:latest", "."], builder.push
   end
 
   test "target native when multiarch is off" do
     builder = new_builder_command(builder: { "multiarch" => false })
     assert_equal "native", builder.name
-    assert_equal [:docker, :build, "-t", "dhh/app:123", ".", "&&", :docker, :push, "dhh/app:123"], builder.push
+    assert_equal [:docker, :build, "-t", "dhh/app:123", "-t", "dhh/app:latest", ".", "&&", :docker, :push, "dhh/app:123"], builder.push
   end
 
   test "target multiarch remote when local and remote is set" do
     builder = new_builder_command(builder: { "local" => { }, "remote" => { } })
     assert_equal "multiarch/remote", builder.name
-    assert_equal [:docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "mrsk-app-multiarch-remote", "-t", "dhh/app:123", "."], builder.push
+    assert_equal [:docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "mrsk-app-multiarch-remote", "-t", "dhh/app:123", "-t", "dhh/app:latest", "."], builder.push
   end
 
   test "target native remote when only remote is set" do
     builder = new_builder_command(builder: { "remote" => { "arch" => "amd64" } })
     assert_equal "native/remote", builder.name
-    assert_equal [:docker, :buildx, :build, "--push", "--platform", "linux/amd64", "--builder", "mrsk-app-native-remote", "-t", "dhh/app:123", "."], builder.push
+    assert_equal [:docker, :buildx, :build, "--push", "--platform", "linux/amd64", "--builder", "mrsk-app-native-remote", "-t", "dhh/app:123", "-t", "dhh/app:latest", "."], builder.push
   end
 
   test "build args" do
@@ -43,17 +41,17 @@ class CommandsBuilderTest < ActiveSupport::TestCase
 
   test "native push with build args" do
     builder = new_builder_command(builder: { "multiarch" => false, "args" => { "a" => 1, "b" => 2 } })
-    assert_equal [ :docker, :build, "-t", "--build-arg", "a=1", "--build-arg", "b=2", "dhh/app:123", ".", "&&", :docker, :push, "dhh/app:123" ], builder.push
+    assert_equal [ :docker, :build, "-t", "dhh/app:123", "-t", "dhh/app:latest", "--build-arg", "a=1", "--build-arg", "b=2", ".", "&&", :docker, :push, "dhh/app:123" ], builder.push
   end
 
   test "multiarch push with build args" do
     builder = new_builder_command(builder: { "args" => { "a" => 1, "b" => 2 } })
-    assert_equal [ :docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "mrsk-app-multiarch", "-t", "dhh/app:123", "--build-arg", "a=1", "--build-arg", "b=2", "." ], builder.push
+    assert_equal [ :docker, :buildx, :build, "--push", "--platform", "linux/amd64,linux/arm64", "--builder", "mrsk-app-multiarch", "-t", "dhh/app:123", "-t", "dhh/app:latest", "--build-arg", "a=1", "--build-arg", "b=2", "." ], builder.push
   end
 
   test "native push with with build secrets" do
     builder = new_builder_command(builder: { "multiarch" => false, "secrets" => [ "a", "b" ] })
-    assert_equal [ :docker, :build, "-t", "--secret", "id=a", "--secret", "id=b", "dhh/app:123", ".", "&&", :docker, :push, "dhh/app:123" ], builder.push
+    assert_equal [ :docker, :build, "-t", "dhh/app:123", "-t", "dhh/app:latest", "--secret", "id=a", "--secret", "id=b", ".", "&&", :docker, :push, "dhh/app:123" ], builder.push
   end
 
   private

test/commands/registry_test.rb

@@ -0,0 +1,23 @@
+require "test_helper"
+
+class CommandsRegistryTest < ActiveSupport::TestCase
+  setup do
+    @config = { service: "app",
+      image: "dhh/app",
+      registry: { "username" => "dhh",
+        "password" => "secret",
+        "server" => "hub.docker.com"
+      },
+      servers: [ "1.1.1.1" ]
+    }
+    @registry = Mrsk::Commands::Registry.new Mrsk::Configuration.new(@config)
+  end
+
+  test "registry login" do
+    assert_equal [ :docker, :login, "hub.docker.com", "-u", "dhh", "-p", "secret" ], @registry.login
+  end
+
+  test "registry logout" do
+    assert_equal [:docker, :logout, "hub.docker.com"], @registry.logout
+  end
+end

test/commands/traefik_test.rb

@@ -0,0 +1,87 @@
+require "test_helper"
+
+class CommandsTraefikTest < 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 --name traefik -d --restart unless-stopped --log-opt max-size=10m -p 80:80 -v /var/run/docker.sock:/var/run/docker.sock traefik --providers.docker --log.level=DEBUG --accesslog.format json --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 -t 2>&1",
+      new_command.logs.join(" ")
+  end
+
+  test "traefik logs since 2h" do
+    assert_equal \
+      "docker logs traefik  --since 2h -t 2>&1",
+      new_command.logs(since: '2h').join(" ")
+  end
+
+  test "traefik logs last 10 lines" do
+    assert_equal \
+      "docker logs traefik  -n 10 -t 2>&1",
+      new_command.logs(lines: 10).join(" ")
+  end
+
+  test "traefik logs with grep hello!" do
+    assert_equal \
+      "docker logs traefik -t 2>&1 | grep 'hello!'",
+      new_command.logs(grep: 'hello!').join(" ")
+  end
+
+  test "traefik remove container" do
+    assert_equal \
+      "docker container prune -f --filter label=org.opencontainers.image.title=Traefik",
+      new_command.remove_container.join(" ")
+  end
+
+  test "traefik remove image" do
+    assert_equal \
+      "docker image prune -a -f --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 -t -n 10 -f 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 -t -n 10 -f 2>&1 | grep \"hello!\"'",
+      new_command.follow_logs(host: @config[:servers].first, grep: 'hello!')
+  end
+
+  private
+    def new_command
+      Mrsk::Commands::Traefik.new(Mrsk::Configuration.new(@config, version: "123"))
+    end
+end

test/configuration/accessory_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "mrsk/configuration"
 
 class ConfigurationAccessoryTest < ActiveSupport::TestCase
   setup do
@@ -98,7 +97,8 @@ class ConfigurationAccessoryTest < ActiveSupport::TestCase
     @deploy[:accessories]["mysql"]["files"] << "test/fixtures/files/structure.sql.erb:/docker-entrypoint-initdb.d/structure.sql"
     @config = Mrsk::Configuration.new(@deploy)
 
-    assert_equal "This was dynamically expanded", @config.accessory(:mysql).files.keys[2].read
+    assert_match "This was dynamically expanded", @config.accessory(:mysql).files.keys[2].read
+    assert_match "%", @config.accessory(:mysql).files.keys[2].read
   end
 
   test "directories" do

test/configuration/role_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "mrsk/configuration"
 
 class ConfigurationRoleTest < ActiveSupport::TestCase
   setup do

test/configuration_test.rb

@@ -1,5 +1,4 @@
 require "test_helper"
-require "mrsk/configuration"
 
 class ConfigurationTest < ActiveSupport::TestCase
   setup do
@@ -105,6 +104,14 @@ class ConfigurationTest < ActiveSupport::TestCase
     ENV["PASSWORD"] = nil
   end
 
+  test "env args with only clear" do
+    config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!({
+      env: { "clear" => { "PORT" => "3000" } }
+    }) })
+
+    assert_equal [ "-e", "PORT=3000" ], config.env_args
+  end
+
   test "env args with only secrets" do
     ENV["PASSWORD"] = "secret123"
     config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!({
@@ -118,29 +125,32 @@ class ConfigurationTest < ActiveSupport::TestCase
   end
 
   test "env args with missing secret" do
-    config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!({
-      env: { "secret" => [ "PASSWORD" ] }
-    }) })
-
     assert_raises(KeyError) do
-      assert_equal [ "-e", "PASSWORD=secret123" ], config.env_args
+      config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!({
+        env: { "secret" => [ "PASSWORD" ] }
+      }) })
     end
   end
 
+  test "valid config" do
+    assert @config.valid?
+  end
+
   test "ssh options" do
     assert_equal "root", @config.ssh_options[:user]
 
-    config = Mrsk::Configuration.new(@deploy.tap { |c| c[:ssh_user] = "app" })
+    config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!(ssh: { "user" => "app" }) })
     assert_equal "app", @config.ssh_options[:user]
   end
 
-  test "master key" do
-    assert_equal "456", @config.master_key
+  test "ssh options with proxy host" do
+    config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!(ssh: { "proxy" => "1.2.3.4" }) })
+    assert_equal "root@1.2.3.4", @config.ssh_options[:proxy].jump_proxies
   end
 
-  test "skip master key" do
-    config = Mrsk::Configuration.new(@deploy.tap { |c| c[:skip_master_key] = true })
-    assert_nil @config.master_key
+  test "ssh options with proxy host and user" do
+    config = Mrsk::Configuration.new(@deploy.tap { |c| c.merge!(ssh: { "proxy" => "app@1.2.3.4" }) })
+    assert_equal "app@1.2.3.4", @config.ssh_options[:proxy].jump_proxies
   end
 
   test "volume_args" do

test/fixtures/files/structure.sql.erb

@@ -1 +1,2 @@
 <%= "This was dynamically expanded" %>
+<%= ENV["MYSQL_ROOT_HOST"] %>

test/test_helper.rb

@@ -2,15 +2,14 @@ require "bundler/setup"
 require "active_support/test_case"
 require "active_support/testing/autorun"
 require "debug"
+require "mocha/minitest" # using #stubs that can alter returns
+require "minitest/autorun" # using #stub that take args
 require "sshkit"
+require "mrsk"
 
 ActiveSupport::LogSubscriber.logger = ActiveSupport::Logger.new(STDOUT) if ENV["VERBOSE"]
 
 SSHKit.config.backend = SSHKit::Backend::Printer
 
 class ActiveSupport::TestCase
-  private
-    def stdouted
-      capture(:stdout) { yield }.strip
-    end
 end