Class: Indocker::ContainerDeployer

Inherits:
Object
  • Object
show all
Defined in:
lib/indocker/container_deployer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(configuration:, logger:) ⇒ ContainerDeployer

Returns a new instance of ContainerDeployer.



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# File 'lib/indocker/container_deployer.rb', line 4

def initialize(configuration:, logger:)
  @configuration = configuration
  @logger = logger

  @server_pool = Indocker::ServerPools::DeployServerPool.new(
    configuration: @configuration,
    logger: logger
  )

  @deployed_containers = Hash.new(false)
  @deployed_servers = {}

  @server_locks = {}
  @server_locks_mutex = Mutex.new
end

Instance Attribute Details

#server_pool ⇒ Object (readonly)

Returns the value of attribute server_pool.



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# File 'lib/indocker/container_deployer.rb', line 2

def server_pool
  @server_pool
end

Instance Method Details

#close_sessions ⇒ Object 



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# File 'lib/indocker/container_deployer.rb', line 51

def close_sessions
  @server_pool.close_sessions
rescue => e
  @logger.error("error during closing sessions #{e.inspect}")
end

#deploy(container, force_restart, skip_force_restart, progress) ⇒ Object 



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# File 'lib/indocker/container_deployer.rb', line 20

def deploy(container, force_restart, skip_force_restart, progress)
  return if @deployed_containers[container]

  exit_codes =
    if deploy_servers_in_parallel?(container)
      # Stateless containers: deploy to all servers at once.
      threads = container.servers.map do |server|
        Thread.new do
          deploy_to_server(container, server, force_restart, skip_force_restart, progress)
        end
      end

      threads.map(&:value)
    else
      # Rolling deploy: one server at a time. Containers with rolling-restart
      # hooks (e.g. draining/enabling an nginx upstream) sit behind a load
      # balancer, so all of their servers must not restart simultaneously —
      # otherwise there is a moment with no live backend (502s). Deploying
      # server by server keeps the rest of the fleet serving.
      container.servers.map do |server|
        deploy_to_server(container, server, force_restart, skip_force_restart, progress)
      end
    end

  if exit_codes.any? { |exit_code| exit_code != 0 }
    exit 1
  end

  @deployed_containers[container] = true
end