SSH proxy: allow using a bare hostname without root@

Otherwise we can't connect to the proxy as the local user and we can't
use ~/.ssh/config to set User directives.

Defaulting to root@ is hard to deprecate without introducing new config.
A clean break is probably clearest.

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    kamal (2.2.1)
+    kamal (2.1.1)
       activesupport (>= 7.0)
       base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)

lib/kamal/cli/accessory.rb

@@ -1,5 +1,3 @@
-require "active_support/core_ext/array/conversions"
-
 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, prepare: true)

lib/kamal/cli/main.rb

@@ -135,7 +135,7 @@ class Kamal::Cli::Main < Kamal::Cli::Base
     puts "No documentation found for #{section}"
   end
 
-  desc "init", "Create config stub in config/deploy.yml and secrets stub in .kamal"
+  desc "init", "Create config stub in config/deploy.yml and env stub in .env"
   option :bundle, type: :boolean, default: false, desc: "Add Kamal to the Gemfile and create a bin/kamal binstub"
   def init
     require "fileutils"

lib/kamal/cli/proxy.rb

@@ -21,18 +21,16 @@ class Kamal::Cli::Proxy < Kamal::Cli::Base
     end
   end
 
-  desc "boot_config <set|get|reset>", "Mange kamal-proxy boot configuration"
+  desc "boot_config <set|get|clear>", "Mange kamal-proxy boot configuration"
   option :publish, type: :boolean, default: true, desc: "Publish the proxy ports on the host"
   option :http_port, type: :numeric, default: Kamal::Configuration::PROXY_HTTP_PORT, desc: "HTTP port to publish on the host"
   option :https_port, type: :numeric, default: Kamal::Configuration::PROXY_HTTPS_PORT, desc: "HTTPS port to publish on the host"
-  option :log_max_size, type: :string, default: Kamal::Configuration::PROXY_LOG_MAX_SIZE, desc: "Max size of proxy logs"
   option :docker_options, type: :array, default: [], desc: "Docker options to pass to the proxy container", banner: "option=value option2=value2"
   def boot_config(subcommand)
     case subcommand
     when "set"
       boot_options = [
         *(KAMAL.config.proxy_publish_args(options[:http_port], options[:https_port]) if options[:publish]),
-        *(KAMAL.config.proxy_logging_args(options[:log_max_size])),
         *options[:docker_options].map { |option| "--#{option}" }
       ]
 

lib/kamal/cli/templates/deploy.yml

@@ -14,9 +14,8 @@ servers:
   #   cmd: bin/jobs
 
 # Enable SSL auto certification via Let's Encrypt (and allow for multiple apps on one server).
-# If using something like Cloudflare, it is recommended to set encryption mode 
-# in Cloudflare's SSL/TLS setting to "Full" to enable end-to-end encryption. 
-proxy: 
+# Set ssl: false if using something like Cloudflare to terminate SSL (but keep host!).
+proxy:
   ssl: true
   host: app.example.com
   # kamal-proxy connects to your container over port 80, use `app_port` to specify a different port.

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

@@ -1,3 +1,13 @@
-#!/bin/sh
+#!/usr/bin/env ruby
 
-echo "Docker set up on $KAMAL_HOSTS..."
+# A sample docker-setup hook
+#
+# Sets up a Docker network on defined hosts which can then be used by the application’s containers
+
+hosts = ENV["KAMAL_HOSTS"].split(",")
+
+hosts.each do |ip|
+  destination = "root@#{ip}"
+  puts "Creating a Docker network \"kamal\" on #{destination}"
+  `ssh #{destination} docker network create kamal`
+end

lib/kamal/configuration.rb

@@ -14,10 +14,9 @@ class Kamal::Configuration
 
   include Validation
 
-  PROXY_MINIMUM_VERSION = "v0.8.1"
+  PROXY_MINIMUM_VERSION = "v0.7.0"
   PROXY_HTTP_PORT = 80
   PROXY_HTTPS_PORT = 443
-  PROXY_LOG_MAX_SIZE = "10m"
 
   class << self
     def create_from(config_file:, destination: nil, version: nil)
@@ -253,12 +252,8 @@ class Kamal::Configuration
     argumentize "--publish", [ "#{http_port}:#{PROXY_HTTP_PORT}", "#{https_port}:#{PROXY_HTTPS_PORT}" ]
   end
 
-  def proxy_logging_args(max_size)
-    argumentize "--log-opt", "max-size=#{max_size}"
-  end
-
   def proxy_options_default
-    [ *proxy_publish_args(PROXY_HTTP_PORT, PROXY_HTTPS_PORT), *proxy_logging_args(PROXY_LOG_MAX_SIZE) ]
+    proxy_publish_args PROXY_HTTP_PORT, PROXY_HTTPS_PORT
   end
 
   def proxy_image

lib/kamal/configuration/docs/ssh.yml

@@ -29,8 +29,8 @@ ssh:
 
   # Proxy host
   #
-  # Specified in the form <host> or <user>@<host>:
-  proxy: root@proxy-host
+  # Specified in the form <host> or <user>@<host>
+  proxy: proxy-host
 
   # Proxy command
   #

lib/kamal/configuration/proxy.rb

@@ -29,7 +29,7 @@ class Kamal::Configuration::Proxy
   def deploy_options
     {
       host: hosts,
-      tls: proxy_config["ssl"].presence,
+      tls: proxy_config["ssl"],
       "deploy-timeout": seconds_duration(config.deploy_timeout),
       "drain-timeout": seconds_duration(config.drain_timeout),
       "health-check-interval": seconds_duration(proxy_config.dig("healthcheck", "interval")),

lib/kamal/configuration/ssh.rb

@@ -19,9 +19,9 @@ class Kamal::Configuration::Ssh
   end
 
   def proxy
-    if (proxy = ssh_config["proxy"])
-      Net::SSH::Proxy::Jump.new(proxy.include?("@") ? proxy : "root@#{proxy}")
-    elsif (proxy_command = ssh_config["proxy_command"])
+    if proxy = ssh_config["proxy"]
+      Net::SSH::Proxy::Jump.new(proxy)
+    elsif proxy_command = ssh_config["proxy_command"]
       Net::SSH::Proxy::Command.new(proxy_command)
     end
   end

lib/kamal/version.rb

@@ -1,3 +1,3 @@
 module Kamal
-  VERSION = "2.2.1"
+  VERSION = "2.1.1"
 end

test/cli/proxy_test.rb

@@ -4,7 +4,7 @@ class CliProxyTest < CliTestCase
   test "boot" do
     run_command("boot").tap do |output|
       assert_match "docker login", output
-      assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") #{KAMAL.config.proxy_image}", output
+      assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") #{KAMAL.config.proxy_image}", output
     end
   end
 
@@ -18,7 +18,7 @@ class CliProxyTest < CliTestCase
     exception = assert_raises do
       run_command("boot").tap do |output|
         assert_match "docker login", output
-        assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") #{KAMAL.config.proxy_image}", output
+        assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") #{KAMAL.config.proxy_image}", output
       end
     end
 
@@ -36,7 +36,7 @@ class CliProxyTest < CliTestCase
 
     run_command("boot").tap do |output|
       assert_match "docker login", output
-      assert_match "docker container start kamal-proxy || docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") #{KAMAL.config.proxy_image}", output
+      assert_match "docker container start kamal-proxy || docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") #{KAMAL.config.proxy_image}", output
     end
   ensure
     Thread.report_on_exception = false
@@ -57,13 +57,13 @@ class CliProxyTest < CliTestCase
       assert_match "docker container stop kamal-proxy on 1.1.1.1", output
       assert_match "Running docker container stop traefik ; docker container prune --force --filter label=org.opencontainers.image.title=Traefik && docker image prune --all --force --filter label=org.opencontainers.image.title=Traefik on 1.1.1.1", output
       assert_match "docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy on 1.1.1.1", output
-      assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") #{KAMAL.config.proxy_image} on 1.1.1.1", output
+      assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") #{KAMAL.config.proxy_image} on 1.1.1.1", output
       assert_match "docker exec kamal-proxy kamal-proxy deploy app-web --target=\"abcdefabcdef:80\" --deploy-timeout=\"6s\" --drain-timeout=\"30s\" --buffer-requests --buffer-responses --log-request-header=\"Cache-Control\" --log-request-header=\"Last-Modified\" --log-request-header=\"User-Agent\" on 1.1.1.1", output
 
       assert_match "docker container stop kamal-proxy on 1.1.1.2", output
       assert_match "Running docker container stop traefik ; docker container prune --force --filter label=org.opencontainers.image.title=Traefik && docker image prune --all --force --filter label=org.opencontainers.image.title=Traefik on 1.1.1.2", output
       assert_match "docker container prune --force --filter label=org.opencontainers.image.title=kamal-proxy on 1.1.1.2", output
-      assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") #{KAMAL.config.proxy_image} on 1.1.1.2", output
+      assert_match "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") #{KAMAL.config.proxy_image} on 1.1.1.2", output
       assert_match "docker exec kamal-proxy kamal-proxy deploy app-web --target=\"abcdefabcdef:80\" --deploy-timeout=\"6s\" --drain-timeout=\"30s\" --buffer-requests --buffer-responses --log-request-header=\"Cache-Control\" --log-request-header=\"Last-Modified\" --log-request-header=\"User-Agent\" on 1.1.1.2", output
     end
   end
@@ -198,7 +198,7 @@ class CliProxyTest < CliTestCase
       assert_match "/usr/bin/env mkdir -p .kamal", output
       assert_match "docker network create kamal", output
       assert_match "docker login -u [REDACTED] -p [REDACTED]", output
-      assert_match "docker container start kamal-proxy || docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") basecamp/kamal-proxy:#{Kamal::Configuration::PROXY_MINIMUM_VERSION}", output
+      assert_match "docker container start kamal-proxy || docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") basecamp/kamal-proxy:#{Kamal::Configuration::PROXY_MINIMUM_VERSION}", output
       assert_match "/usr/bin/env mkdir -p .kamal", output
       assert_match %r{docker rename app-web-latest app-web-latest_replaced_.*}, output
       assert_match "/usr/bin/env mkdir -p .kamal/apps/app/env/roles", output
@@ -240,7 +240,7 @@ class CliProxyTest < CliTestCase
     run_command("boot_config", "set").tap do |output|
       %w[ 1.1.1.1 1.1.1.2 ].each do |host|
         assert_match "Running /usr/bin/env mkdir -p .kamal/proxy on #{host}", output
-        assert_match "Uploading \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\" to .kamal/proxy/options on #{host}", output
+        assert_match "Uploading \"--publish 80:80 --publish 443:443\" to .kamal/proxy/options on #{host}", output
       end
     end
   end
@@ -249,16 +249,7 @@ class CliProxyTest < CliTestCase
     run_command("boot_config", "set", "--publish", "false").tap do |output|
       %w[ 1.1.1.1 1.1.1.2 ].each do |host|
         assert_match "Running /usr/bin/env mkdir -p .kamal/proxy on #{host}", output
-        assert_match "Uploading \"--log-opt max-size=10m\" to .kamal/proxy/options on #{host}", output
-      end
-    end
-  end
-
-  test "boot_config set custom max_size" do
-    run_command("boot_config", "set", "--log-max-size", "100m").tap do |output|
-      %w[ 1.1.1.1 1.1.1.2 ].each do |host|
-        assert_match "Running /usr/bin/env mkdir -p .kamal/proxy on #{host}", output
-        assert_match "Uploading \"--publish 80:80 --publish 443:443 --log-opt max-size=100m\" to .kamal/proxy/options on #{host}", output
+        assert_match "Uploading \"\" to .kamal/proxy/options on #{host}", output
       end
     end
   end
@@ -267,7 +258,7 @@ class CliProxyTest < CliTestCase
     run_command("boot_config", "set", "--http-port", "8080", "--https-port", "8443").tap do |output|
       %w[ 1.1.1.1 1.1.1.2 ].each do |host|
         assert_match "Running /usr/bin/env mkdir -p .kamal/proxy on #{host}", output
-        assert_match "Uploading \"--publish 8080:80 --publish 8443:443 --log-opt max-size=10m\" to .kamal/proxy/options on #{host}", output
+        assert_match "Uploading \"--publish 8080:80 --publish 8443:443\" to .kamal/proxy/options on #{host}", output
       end
     end
   end
@@ -276,14 +267,14 @@ class CliProxyTest < CliTestCase
     run_command("boot_config", "set", "--docker_options", "label=foo=bar", "add_host=thishost:thathost").tap do |output|
       %w[ 1.1.1.1 1.1.1.2 ].each do |host|
         assert_match "Running /usr/bin/env mkdir -p .kamal/proxy on #{host}", output
-        assert_match "Uploading \"--publish 80:80 --publish 443:443 --log-opt max-size=10m --label=foo=bar --add_host=thishost:thathost\" to .kamal/proxy/options on #{host}", output
+        assert_match "Uploading \"--publish 80:80 --publish 443:443 --label=foo=bar --add_host=thishost:thathost\" to .kamal/proxy/options on #{host}", output
       end
     end
   end
 
   test "boot_config get" do
     SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
-      .with(:cat, ".kamal/proxy/options", "||", :echo, "\"--publish 80:80 --publish 443:443 --log-opt max-size=10m\"")
+      .with(:cat, ".kamal/proxy/options", "||", :echo, "\"--publish 80:80 --publish 443:443\"")
       .returns("--publish 80:80 --publish 8443:443 --label=foo=bar")
       .twice
 

test/commands/app_test.rb

@@ -135,14 +135,6 @@ class CommandsAppTest < ActiveSupport::TestCase
       new_command.deploy(target: "172.1.0.2").join(" ")
   end
 
-  test "deploy with SSL false" do
-    @config[:proxy] = { "ssl" => false }
-
-    assert_equal \
-      "docker exec kamal-proxy kamal-proxy deploy app-web --target=\"172.1.0.2:80\" --deploy-timeout=\"30s\" --drain-timeout=\"30s\" --buffer-requests --buffer-responses --log-request-header=\"Cache-Control\" --log-request-header=\"Last-Modified\" --log-request-header=\"User-Agent\"",
-      new_command.deploy(target: "172.1.0.2").join(" ")
-  end
-
   test "remove" do
     assert_equal \
       "docker exec kamal-proxy kamal-proxy remove app-web",
@@ -302,7 +294,7 @@ class CommandsAppTest < ActiveSupport::TestCase
 
   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 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -J 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
@@ -312,7 +304,7 @@ class CommandsAppTest < ActiveSupport::TestCase
 
   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 -p 22 'ls'", new_command.run_over_ssh("ls", host: "1.1.1.1")
+    assert_equal "ssh -J 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

test/commands/proxy_test.rb

@@ -15,7 +15,7 @@ class CommandsProxyTest < ActiveSupport::TestCase
 
   test "run" do
     assert_equal \
-      "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") basecamp/kamal-proxy:#{Kamal::Configuration::PROXY_MINIMUM_VERSION}",
+      "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") basecamp/kamal-proxy:#{Kamal::Configuration::PROXY_MINIMUM_VERSION}",
       new_command.run.join(" ")
   end
 
@@ -23,7 +23,7 @@ class CommandsProxyTest < ActiveSupport::TestCase
     @config.delete(:proxy)
 
     assert_equal \
-      "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\") basecamp/kamal-proxy:#{Kamal::Configuration::PROXY_MINIMUM_VERSION}",
+      "docker run --name kamal-proxy --network kamal --detach --restart unless-stopped --volume kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy $(cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\") basecamp/kamal-proxy:#{Kamal::Configuration::PROXY_MINIMUM_VERSION}",
       new_command.run.join(" ")
   end
 
@@ -113,7 +113,7 @@ class CommandsProxyTest < ActiveSupport::TestCase
 
   test "get_boot_options" do
     assert_equal \
-      "cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443 --log-opt max-size=10m\"",
+      "cat .kamal/proxy/options || echo \"--publish 80:80 --publish 443:443\"",
       new_command.get_boot_options.join(" ")
   end
 

test/configuration/ssh_test.rb

@@ -30,7 +30,7 @@ class ConfigurationSshTest < ActiveSupport::TestCase
 
   test "ssh options with proxy host" do
     config = Kamal::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
+    assert_equal "1.2.3.4", config.ssh.options[:proxy].jump_proxies
   end
 
   test "ssh options with proxy host and user" do