Class: Bosh::Director::InstanceUpdater::VmUpdater

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

Defined Under Namespace

Classes: DiskAttacher, DiskDetacher, VmCreator, VmDeleter, VmStateApplier

Instance Method Summary collapse

Constructor Details

#initialize(instance, vm_model, agent_client, job_renderer, cloud, max_update_tries, logger) ⇒ VmUpdater

Returns a new instance of VmUpdater.



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# File 'lib/bosh/director/instance_updater/vm_updater.rb', line 3

def initialize(instance, vm_model, agent_client, job_renderer, cloud, max_update_tries, logger)
  @instance = instance
  @vm_model = vm_model
  @agent_client = agent_client
  @job_renderer = job_renderer
  @cloud = cloud
  @max_update_tries = max_update_tries
  @logger = logger
end

Instance Method Details

#attach_missing_disk ⇒ Object 



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# File 'lib/bosh/director/instance_updater/vm_updater.rb', line 63

def attach_missing_disk
  if !@instance.model.persistent_disk_cid || @instance.disk_currently_attached?
    @logger.info('Skipping attaching missing VM')
    return
  end

  begin
    disk_attacher = DiskAttacher.new(@instance, @vm_model, @agent_client, @cloud, @logger)
    disk_attacher.attach
  rescue Bosh::Clouds::NoDiskSpace => e
    @logger.warn("Failed attaching missing disk first time: #{e.inspect}")
    update(@instance.model.persistent_disk_cid)
  end
end

#detach ⇒ Object 



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# File 'lib/bosh/director/instance_updater/vm_updater.rb', line 51

def detach
  @logger.info('Detaching VM')

  disk_detacher = DiskDetacher.new(@instance, @vm_model, @agent_client, @cloud, @logger)
  disk_detacher.detach

  vm_deleter = VmDeleter.new(@instance, @vm_model, @cloud, @logger)
  vm_deleter.delete

  @instance.job.resource_pool.add_idle_vm
end

#update(new_disk_cid) ⇒ Object 



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

def update(new_disk_cid)
  unless @instance.resource_pool_changed? || new_disk_cid
    @logger.info('Skipping VM update')
    return [@vm_model, @agent_client]
  end

  disk_detacher = DiskDetacher.new(@instance, @vm_model, @agent_client, @cloud, @logger)
  disk_detacher.detach

  @max_update_tries.times do |try|
    vm_deleter = VmDeleter.new(@instance, @vm_model, @cloud, @logger)
    vm_deleter.delete

    vm_creator = VmCreator.new(@instance, @cloud, @logger)
    @vm_model, @agent_client = vm_creator.create(new_disk_cid)

    begin
      # Could raise Bosh::Clouds::NoDiskSpace because some CPIs might lazily create disks
      disk_attacher = DiskAttacher.new(@instance, @vm_model, @agent_client, @cloud, @logger)
      disk_attacher.attach
      break
    rescue Bosh::Clouds::NoDiskSpace => e
      if e.ok_to_retry && try < @max_update_tries-1
        @logger.warn("Retrying attach disk operation #{try}: #{e.inspect}")
      else
        @logger.warn("Failed to attach disk to new VM: #{e.inspect}")
        raise CloudNotEnoughDiskSpace,
              "Not enough disk space to update `#{@instance}'"
      end
    end
  end

  vm_state_applier = VmStateApplier.new(@instance, @vm_model, @agent_client, @job_renderer, @logger)
  vm_state_applier.apply

  [@vm_model, @agent_client]
end