Class: Bosh::Director::JobUpdater

Inherits:
Object
  • Object
show all
Defined in:
lib/bosh/director/job_updater.rb

Instance Method Summary collapse

Constructor Details

#initialize(deployment_plan, job) ⇒ JobUpdater

Returns a new instance of JobUpdater.

Parameters:



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# File 'lib/bosh/director/job_updater.rb', line 5

def initialize(deployment_plan, job)
  @deployment_plan = deployment_plan
  @job = job
  @cloud = Config.cloud
  @logger = Config.logger
  @event_log = Config.event_log
end

Instance Method Details

#halt ⇒ Object 



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# File 'lib/bosh/director/job_updater.rb', line 55

def halt
  raise(@job.halt_exception || RuntimeError.new("Deployment has been halted"))
end

#update ⇒ Object 



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# File 'lib/bosh/director/job_updater.rb', line 13

def update
  @logger.info("Deleting no longer needed instances")
  delete_unneeded_instances

  instances = []
  @job.instances.each do |instance|
    instances << instance if instance.changed?
  end

  if instances.empty?
    @logger.info("No instances to update for `#{@job.name}'")
    return
  end

  @logger.info("Found #{instances.size} instances to update")
  event_log_stage = @event_log.begin_stage("Updating job", instances.size, [ @job.name ])

  ThreadPool.new(:max_threads => @job.update.max_in_flight).wrap do |pool|
    num_canaries = [ @job.update.canaries, instances.size ].min
    @logger.info("Starting canary update num_canaries=#{num_canaries}")
    update_canaries(pool, instances, num_canaries, event_log_stage)

    @logger.info("Waiting for canaries to update")
    pool.wait

    @logger.info("Finished canary update")
    if @job.should_halt?
      @logger.warn("Halting deployment due to a canary failure")
      halt
    end

    @logger.info("Continuing the rest of the update")
    update_instances(pool, instances, event_log_stage)
  end

  @logger.info("Finished the rest of the update")
  if @job.should_halt?
    @logger.warn("Halting deployment due to an update failure")
    halt
  end
end