Class: Bosh::Director::InstanceUpdater

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

Defined Under Namespace

Classes: InstanceState, Preparer, StateApplier

Constant Summary collapse

MAX_RECREATE_ATTEMPTS = 
3

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cloud, logger, ip_provider, blobstore, vm_deleter, vm_creator, dns_manager, disk_manager, vm_recreator) ⇒ InstanceUpdater

Returns a new instance of InstanceUpdater.



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# File 'lib/bosh/director/instance_updater.rb', line 30

def initialize(cloud, logger, ip_provider, blobstore, vm_deleter, vm_creator, dns_manager, disk_manager, vm_recreator)
  @cloud = cloud
  @logger = logger
  @blobstore = blobstore
  @vm_deleter = vm_deleter
  @vm_creator = vm_creator
  @dns_manager = dns_manager
  @disk_manager = disk_manager
  @ip_provider = ip_provider
  @vm_recreator = vm_recreator
  @current_state = {}
end

Class Method Details

.new_instance_updater(ip_provider) ⇒ Object 



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# File 'lib/bosh/director/instance_updater.rb', line 7

def self.new_instance_updater(ip_provider)
  logger = Config.logger
  cloud = Config.cloud
  vm_deleter = VmDeleter.new(cloud, logger, false, Config.enable_virtual_delete_vms)
  disk_manager = DiskManager.new(cloud, logger)
  job_renderer = JobRenderer.create
  arp_flusher = ArpFlusher.new
  vm_creator = VmCreator.new(cloud, logger, vm_deleter, disk_manager, job_renderer, arp_flusher)
  vm_recreator = VmRecreator.new(vm_creator, vm_deleter)
  dns_manager = DnsManagerProvider.create
  new(
    cloud,
    logger,
    ip_provider,
    App.instance.blobstores.blobstore,
    vm_deleter,
    vm_creator,
    dns_manager,
    disk_manager,
    vm_recreator
  )
end

Instance Method Details

#update(instance_plan, options = {}) ⇒ Object 



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# File 'lib/bosh/director/instance_updater.rb', line 43

def update(instance_plan, options = {})
  instance = instance_plan.instance
  action, context = get_action_and_context(instance_plan)
  parent_id = add_event(instance.deployment_model.name, action, instance.model.name, context) if instance_plan.changed?
  @logger.info("Updating instance #{instance}, changes: #{instance_plan.changes.to_a.join(', ').inspect}")

  update_procedure = lambda do
    # Optimization to only update DNS if nothing else changed.
    if dns_change_only?(instance_plan)
      @logger.debug('Only change is DNS configuration')
      update_dns(instance_plan)
      return
    end

    unless instance_plan.already_detached?
      Preparer.new(instance_plan, agent(instance), @logger).prepare

      stop(instance_plan)
      take_snapshot(instance)

      if instance.state == 'stopped'
        instance.update_state
        return
      end
    end

    if instance.state == 'detached'
      @logger.info("Detaching instance #{instance}")
      unless instance_plan.already_detached?
        @disk_manager.unmount_disk_for(instance_plan)
        instance_model = instance_plan.new? ? instance_plan.instance.model : instance_plan.existing_instance
        @vm_deleter.delete_for_instance(instance_model)
      end
      release_obsolete_ips(instance_plan)
      instance.update_state
      return
    end

    recreated = false
    if needs_recreate?(instance_plan)
      @logger.debug('Failed to update in place. Recreating VM')
      @disk_manager.unmount_disk_for(instance_plan)
      @vm_recreator.recreate_vm(instance_plan, nil)
      recreated = true
    end

    release_obsolete_ips(instance_plan)

    update_dns(instance_plan)
    @disk_manager.update_persistent_disk(instance_plan)

    unless recreated
      if instance.trusted_certs_changed?
        @logger.debug('Updating trusted certs')
        instance.update_trusted_certs
      end
    end

    cleaner = RenderedJobTemplatesCleaner.new(instance.model, @blobstore, @logger)
    state_applier = InstanceUpdater::StateApplier.new(
      instance_plan,
      agent(instance),
      cleaner,
      @logger,
      canary: options[:canary]
    )
    state_applier.apply(instance_plan.desired_instance.job.update)
  end
  InstanceUpdater::InstanceState.with_instance_update_and_event_creation(instance.model, parent_id, instance.deployment_model.name, action, &update_procedure)
end