Class: Kamal::Cli::App

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

Defined Under Namespace

Classes: Assets, Boot, ErrorPages, SslCertificates

Instance Method Summary collapse

Methods inherited from Base

dynamic_command_class, 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} (or reboot if already running)...", :magenta

      # Assets are prepared in a separate step to ensure they are on all hosts before booting
      on(KAMAL.app_hosts) do
        Kamal::Cli::App::ErrorPages.new(host, self).run

        KAMAL.roles_on(host).each do |role|
          Kamal::Cli::App::Assets.new(host, role, self).run
          Kamal::Cli::App::SslCertificates.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

      host_boot_groups.each do |hosts|
        host_list = Array(hosts).join(",")
        run_hook "pre-app-boot", hosts: host_list

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

        run_hook "post-app-boot", hosts: host_list
        sleep KAMAL.config.boot.wait if KAMAL.config.boot.wait
      end

      # Tag once the app booted on all hosts
      on(KAMAL.app_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 175

def containers
  on(KAMAL.app_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 94

def details
  on(KAMAL.app_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 109

def exec(*cmd)
  pre_connect_if_required

  if (incompatible_options = [ :interactive, :reuse ].select { |key| options[:detach] && options[key] }.presence)
    raise ArgumentError, "Detach is not compatible with #{incompatible_options.join(" or ")}"
  end

  if cmd.empty?
    raise ArgumentError, "No command provided. You must specify a command to execute."
  end

  cmd = Kamal::Utils.join_commands(cmd)
  env = options[:env]
  detach = options[:detach]
  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
      on(KAMAL.primary_host) { execute *KAMAL.registry. }
      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.app_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.app_hosts) do |host|
        execute *KAMAL.registry.

        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, detach: detach))
        end
      end
    end
  end
end

#images ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 207

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

#live ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 269

def live
  with_lock do
    on(KAMAL.proxy_hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.app(role: role, host: host).live if role.running_proxy?
      end
    end
  end
end

#logs ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 219

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

  grep = options[:grep]
  grep_options = options[:grep_options]
  since = options[:since]
  container_id = options[:container_id]
  timestamps = !options[:skip_timestamps]

  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 ||= [ KAMAL.primary_role.name ]
      role = KAMAL.roles_on(KAMAL.primary_host).first

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

    on(KAMAL.app_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(container_id: container_id, timestamps: timestamps, since: since, lines: lines, grep: grep, grep_options: grep_options))
        rescue SSHKit::Command::Failed
          puts_by_host host, "Nothing found"
        end
      end
    end
  end
end

#maintenance ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 284

def maintenance
  maintenance_options = { drain_timeout: options[:drain_timeout] || KAMAL.config.drain_timeout, message: options[:message] }

  with_lock do
    on(KAMAL.proxy_hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.app(role: role, host: host).maintenance(**maintenance_options) if role.running_proxy?
      end
    end
  end
end

#remove ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 259

def remove
  with_lock do
    stop
    remove_containers
    remove_images
    remove_app_directories
  end
end

#remove_app_directories ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 337

def remove_app_directories
  with_lock do
    on(KAMAL.app_hosts) do |host|
      roles = KAMAL.roles_on(host)

      roles.each do |role|
        execute *KAMAL.auditor.record("Removed #{KAMAL.config.app_directory}", role: role), verbosity: :debug
        execute *KAMAL.server.remove_app_directory, raise_on_non_zero_exit: false
      end

      execute *KAMAL.auditor.record("Removed #{KAMAL.config.app_directory}"), verbosity: :debug
      execute *KAMAL.app.remove_proxy_app_directory, raise_on_non_zero_exit: false
    end
  end
end

#remove_container(version) ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 299

def remove_container(version)
  with_lock do
    on(KAMAL.app_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 313

def remove_containers
  with_lock do
    on(KAMAL.app_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 327

def remove_images
  with_lock do
    on(KAMAL.app_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 181

def stale_containers
  stop = options[:stop]

  with_lock_if_stopping do
    on(KAMAL.app_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 46

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

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

        if role.running_proxy?
          version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
          endpoint = capture_with_info(*app.container_id_for_version(version)).strip
          raise Kamal::Cli::BootError, "Failed to get endpoint for #{role} on #{host}, did the container boot?" if endpoint.empty?

          execute *app.deploy(target: endpoint)
        end
      end
    end
  end
end

#stop ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 69

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

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

        if role.running_proxy?
          version = capture_with_info(*app.current_running_version, raise_on_non_zero_exit: false).strip
          endpoint = capture_with_info(*app.container_id_for_version(version)).strip
          if endpoint.present?
            execute *app.remove, raise_on_non_zero_exit: false
          end
        end

        execute *app.stop, raise_on_non_zero_exit: false
      end
    end
  end
end

#version ⇒ Object

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# File 'lib/kamal/cli/app.rb', line 354

def version
  on(KAMAL.app_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