Class: Kamal::Cli::App

Inherits:
Base
  • Object
show all
Defined in:
lib/kamal/cli/app.rb

Defined Under Namespace

Classes: Boot, PrepareAssets

Instance Method Summary collapse

Methods inherited from Base

exit_on_failure?, #initialize

Constructor Details

This class inherits a constructor from Kamal::Cli::Base

Instance Method Details

#boot ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 3

def boot
  with_lock do
    say "Get most recent version available as an image...", :magenta unless options[:version]
    using_version(version_or_latest) do |version|
      say "Start container with version #{version} using a #{KAMAL.config.readiness_delay}s readiness delay (or reboot if already running)...", :magenta

      # Assets are prepared in a separate step to ensure they are on all hosts before booting
      on(KAMAL.hosts) do
        KAMAL.roles_on(host).each do |role|
          Kamal::Cli::App::PrepareAssets.new(host, role, self).run
        end
      end

      # Primary hosts and roles are returned first, so they can open the barrier
      barrier = Kamal::Cli::Healthcheck::Barrier.new if KAMAL.roles.many?

      on(KAMAL.hosts, **KAMAL.boot_strategy) do |host|
        KAMAL.roles_on(host).each do |role|
          Kamal::Cli::App::Boot.new(host, role, self, version, barrier).run
        end
      end

      # Tag once the app booted on all hosts
      on(KAMAL.hosts) do |host|
        execute *KAMAL.auditor.record("Tagging #{KAMAL.config.absolute_image} as the latest image"), verbosity: :debug
        execute *KAMAL.app.tag_latest_image
      end
    end
  end
end

#containers ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 129

def containers
  on(KAMAL.hosts) { |host| puts_by_host host, capture_with_info(*KAMAL.app.list_containers) }
end

#details ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 64

def details
  on(KAMAL.hosts) do |host|
    roles = KAMAL.roles_on(host)

    roles.each do |role|
      puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).info)
    end
  end
end

#exec(cmd) ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 78

def exec(cmd)
  env = options[:env]
  case
  when options[:interactive] && options[:reuse]
    say "Get current version of running container...", :magenta unless options[:version]
    using_version(options[:version] || current_running_version) do |version|
      say "Launching interactive command with version #{version} via SSH from existing container on #{KAMAL.primary_host}...", :magenta
      run_locally { exec KAMAL.app(role: KAMAL.primary_role, host: KAMAL.primary_host).execute_in_existing_container_over_ssh(cmd, env: env) }
    end

  when options[:interactive]
    say "Get most recent version available as an image...", :magenta unless options[:version]
    using_version(version_or_latest) do |version|
      say "Launching interactive command with version #{version} via SSH from new container on #{KAMAL.primary_host}...", :magenta
      run_locally do
        exec KAMAL.app(role: KAMAL.primary_role, host: KAMAL.primary_host).execute_in_new_container_over_ssh(cmd, env: env)
      end
    end

  when options[:reuse]
    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(KAMAL.hosts) do |host|
        roles = KAMAL.roles_on(host)

        roles.each do |role|
          execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on app version #{version}", role: role), verbosity: :debug
          puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).execute_in_existing_container(cmd, env: env))
        end
      end
    end

  else
    say "Get most recent version available as an image...", :magenta unless options[:version]
    using_version(version_or_latest) do |version|
      say "Launching command with version #{version} from new container...", :magenta
      on(KAMAL.hosts) do |host|
        roles = KAMAL.roles_on(host)

        roles.each do |role|
          execute *KAMAL.auditor.record("Executed cmd '#{cmd}' on app version #{version}"), verbosity: :debug
          puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).execute_in_new_container(cmd, env: env))
        end
      end
    end
  end
end

#images ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 161

def images
  on(KAMAL.hosts) { |host| puts_by_host host, capture_with_info(*KAMAL.app.list_images) }
end

#logs ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 170

def logs
  # FIXME: Catch when app containers aren't running

  grep = options[:grep]
  since = options[:since]
  if options[:follow]
    lines = options[:lines].presence || ((since || grep) ? nil : 10) # Default to 10 lines if since or grep isn't set

    run_locally do
      info "Following logs on #{KAMAL.primary_host}..."

      KAMAL.specific_roles ||= [ "web" ]
      role = KAMAL.roles_on(KAMAL.primary_host).first

      app = KAMAL.app(role: role, host: host)
      info app.follow_logs(host: KAMAL.primary_host, lines: lines, grep: grep)
      exec app.follow_logs(host: KAMAL.primary_host, lines: lines, grep: grep)
    end
  else
    lines = options[:lines].presence || ((since || grep) ? nil : 100) # Default to 100 lines if since or grep isn't set

    on(KAMAL.hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        begin
          puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).logs(since: since, lines: lines, grep: grep))
        rescue SSHKit::Command::Failed
          puts_by_host host, "Nothing found"
        end
      end
    end
  end
end

#remove ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 206

def remove
  with_lock do
    stop
    remove_containers
    remove_images
  end
end

#remove_container(version) ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 215

def remove_container(version)
  with_lock do
    on(KAMAL.hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.auditor.record("Removed app container with version #{version}", role: role), verbosity: :debug
        execute *KAMAL.app(role: role, host: host).remove_container(version: version)
      end
    end
  end
end

#remove_containers ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 229

def remove_containers
  with_lock do
    on(KAMAL.hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.auditor.record("Removed all app containers", role: role), verbosity: :debug
        execute *KAMAL.app(role: role, host: host).remove_containers
      end
    end
  end
end

#remove_images ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 243

def remove_images
  with_lock do
    on(KAMAL.hosts) do
      execute *KAMAL.auditor.record("Removed all app images"), verbosity: :debug
      execute *KAMAL.app.remove_images
    end
  end
end

#stale_containers ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 135

def stale_containers
  stop = options[:stop]

  with_lock_if_stopping do
    on(KAMAL.hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        app = KAMAL.app(role: role, host: host)
        versions = capture_with_info(*app.list_versions, raise_on_non_zero_exit: false).split("\n")
        versions -= [ capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip ]

        versions.each do |version|
          if stop
            puts_by_host host, "Stopping stale container for role #{role} with version #{version}"
            execute *app.stop(version: version), raise_on_non_zero_exit: false
          else
            puts_by_host host,  "Detected stale container for role #{role} with version #{version} (use `kamal app stale_containers --stop` to stop)"
          end
        end
      end
    end
  end
end

#start ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 35

def start
  with_lock do
    on(KAMAL.hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.auditor.record("Started app version #{KAMAL.config.version}"), verbosity: :debug
        execute *KAMAL.app(role: role, host: host).start, raise_on_non_zero_exit: false
      end
    end
  end
end

#stop ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 49

def stop
  with_lock do
    on(KAMAL.hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.auditor.record("Stopped app", role: role), verbosity: :debug
        execute *KAMAL.app(role: role, host: host).stop, raise_on_non_zero_exit: false
      end
    end
  end
end

#version ⇒ Object 



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# File 'lib/kamal/cli/app.rb', line 253

def version
  on(KAMAL.hosts) do |host|
    role = KAMAL.roles_on(host).first
    puts_by_host host, capture_with_info(*KAMAL.app(role: role, host: host).current_running_version).strip
  end
end