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, links_resolver, disk_manager) ⇒ JobUpdater

Returns a new instance of JobUpdater.

Parameters:



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# File 'lib/bosh/director/job_updater.rb', line 6

def initialize(deployment_plan, job, links_resolver, disk_manager)
  @deployment_plan = deployment_plan
  @job = job
  @links_resolver = links_resolver

  @logger = Config.logger
  @event_log = Config.event_log
  @disk_manager = disk_manager
end

Instance Method Details

#update ⇒ Object 



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# File 'lib/bosh/director/job_updater.rb', line 16

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

  instance_plans = @job.needed_instance_plans.select do | instance_plan |
    if instance_plan.should_be_ignored?
      false
    elsif instance_plan.changed?
      true
    else
      # no changes necessary for the agent, but some metadata may have
      # changed (i.e. vm_type.name), so push state to the db regardless
      instance_plan.persist_current_spec
      false
    end
  end

  if instance_plans.empty?
    @logger.info("No instances to update for '#{@job.name}'")
    return
  else
    @job.did_change = true
  end

  instance_plans.each do |instance_plan|
    changes = instance_plan.changes
    @logger.debug("Need to update instance '#{instance_plan.instance}', changes: #{changes.to_a.join(', ').inspect}")
  end

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

  ordered_azs = []
  instance_plans.each do | instance_plan |
    unless ordered_azs.include?(instance_plan.instance.availability_zone)
      ordered_azs.push(instance_plan.instance.availability_zone)
    end
  end

  instance_plans_by_az = instance_plans.group_by{ |instance_plan| instance_plan.instance.availability_zone }
  canaries_done = false

  ordered_azs.each do | az |
    az_instance_plans = instance_plans_by_az[az]
    @logger.info("Starting to update az '#{az}'")
    ThreadPool.new(:max_threads => @job.update.max_in_flight).wrap do |pool|
      unless canaries_done
        num_canaries = [@job.update.canaries, az_instance_plans.size].min
        @logger.info("Starting canary update num_canaries=#{num_canaries}")
        update_canaries(pool, az_instance_plans, num_canaries, event_log_stage)

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

        @logger.info('Finished canary update')

        canaries_done = true
      end

      @logger.info('Continuing the rest of the update')
      update_instances(pool, az_instance_plans, event_log_stage)
      @logger.info('Finished the rest of the update')
    end
    @logger.info("Finished updating az '#{az}'")
  end
end