Class: Mamiya::Agent

Inherits:
Object
  • Object
show all
Includes:
Actions, Util::LabelMatcher
Defined in:
lib/mamiya/agent.rb,
lib/mamiya/agent/actions.rb,
lib/mamiya/agent/task_queue.rb,
lib/mamiya/agent/tasks/ping.rb,
lib/mamiya/agent/tasks/clean.rb,
lib/mamiya/agent/tasks/fetch.rb,
lib/mamiya/agent/tasks/switch.rb,
lib/mamiya/agent/handlers/task.rb,
lib/mamiya/agent/tasks/prepare.rb,
lib/mamiya/agent/tasks/abstract.rb,
lib/mamiya/agent/tasks/notifyable.rb,
lib/mamiya/agent/handlers/abstract.rb

Direct Known Subclasses

Master

Defined Under Namespace

Modules: Actions, Handlers, Tasks Classes: TaskQueue

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util::LabelMatcher

#match?, parse_string_expr

Methods included from Actions

#distribute, #order_task, #ping, #prepare, #switch

Constructor Details

#initialize(config, logger: Mamiya::Logger.new, events_only: nil) ⇒ Agent

Returns a new instance of Agent.



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# File 'lib/mamiya/agent.rb', line 29

def initialize(config, logger: Mamiya::Logger.new, events_only: nil)
  @config = config
  @serf = init_serf
  @trigger_lock = Mutex.new
  @events_only = events_only

  @terminate = false

  @logger = logger['agent']
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/mamiya/agent.rb', line 40

def config
  @config
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/mamiya/agent.rb', line 40

def logger
  @logger
end

#serf ⇒ Object (readonly)

Returns the value of attribute serf.



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# File 'lib/mamiya/agent.rb', line 40

def serf
  @serf
end

Instance Method Details

#currents ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 171

def currents
  # TODO: when the target is in outside?
  Hash[config.applications.map do |name, app|
    deploy_to = Pathname.new(app[:deploy_to])
    current = deploy_to.join('current')
    next unless current.exist?

    [
      name,
      current.realpath.basename.to_s
    ]
  end.compact]
end

#existing_packages ⇒ Object

Returns hash with existing packages (where valid) by app name. Packages which has json and tarball is considered as valid.



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# File 'lib/mamiya/agent.rb', line 111

def existing_packages
  paths_by_app = Dir[File.join(config[:packages_dir], '*', '*.{tar.gz,json}')].group_by { |path|
    path.split(File::SEPARATOR)[-2]
  }

  Hash[
    paths_by_app.map { |app, paths|
      names_by_base = paths.group_by do |path|
        File.basename(path).sub(/\.(?:tar\.gz|json)\z/, '')
      end

      packages = names_by_base.flat_map { |base, names|
        names.map do |name|
          (
            name.end_with?(".tar.gz") &&
            names.find { |_| _.end_with?(".json") } &&
            base
          ) || nil
        end
      }.compact

      [app, packages.sort]
    }
  ]
end

#existing_prereleases ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 137

def existing_prereleases
  paths_by_app = Dir[File.join(config[:prereleases_dir], '*', '*')].group_by { |path|
    path.split(File::SEPARATOR)[-2]
  }

  Hash[
    paths_by_app.map { |app, paths|
      [
        app,
        paths.select { |path|
          File.exist? File.join(path, '.mamiya.prepared')
        }.map { |path|
          File.basename(path)
        }.sort
      ]
    }
  ]
end

#labels ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 102

def labels
  config.labels[[]]
end

#releases ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 156

def releases
  Hash[config.applications.map do |name, app|
    deploy_to = Pathname.new(app[:deploy_to])
    releases = deploy_to.join('releases')
    next [name, []] unless releases.exist?

    [
      name,
      releases.children.map do |release|
        release.basename.to_s
      end.sort
    ]
  end.compact]
end

#run! ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 52

def run!
  logger.info "Starting..."
  start()
  logger.info "Started."

  loop do
    if @terminate
      terminate
      return
    end
    sleep 1
  end
end

#start ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 70

def start
  serf_start
  task_queue_start
end

#status(packages: true) ⇒ Object

Returns agent status. Used for HTTP API and ‘serf query` inspection.



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# File 'lib/mamiya/agent.rb', line 84

def status(packages: true)
  # When changing signature, don't forget to change samely of Master#status too
  {}.tap do |s|
    s[:name] = serf.name
    s[:version] = Mamiya::VERSION
    s[:labels] = labels

    s[:queues] = task_queue.status

    if packages
      s[:packages] = self.existing_packages
      s[:prereleases] = self.existing_prereleases
      s[:releases] = self.releases
      s[:currents] = self.currents
    end
  end
end

#stop! ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 66

def stop!
  @terminate = true
end

#task_queue ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 42

def task_queue
  @task_queue ||= Mamiya::Agent::TaskQueue.new(self, logger: logger, task_classes: [
    Mamiya::Agent::Tasks::Fetch,
    Mamiya::Agent::Tasks::Prepare,
    Mamiya::Agent::Tasks::Clean,
    Mamiya::Agent::Tasks::Switch,
    Mamiya::Agent::Tasks::Ping,
  ])
end

#terminate ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 75

def terminate
  serf.stop!
  task_queue.stop!
ensure
  @terminate = false
end

#trigger(type, action: nil, coalesce: true, **payload) ⇒ Object 



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# File 'lib/mamiya/agent.rb', line 185

def trigger(type, action: nil, coalesce: true, **payload)
  name = "mamiya:#{type}"
  name << ":#{action}" if action

  payload_str = payload.merge(name: self.serf.name).to_json

  @trigger_lock.synchronize do
    serf.event(name, payload_str, coalesce: coalesce)
  end
end