Synnefo » snf-ganeti » ganeti-local

def HotplugDevice(instance, action, dev_type, device, extra, seq):

  """Hotplug a device

  Hotplug is currently supported only for KVM Hypervisor.

  @type instance: L{objects.Instance}

  @param instance: the instance to which we hotplug a device

  @type action: string

  @param action: the hotplug action to perform

  @type dev_type: string

  @param dev_type: the device type to hotplug

  @type device: either L{objects.NIC} or L{objects.Disk}

  @param device: the device object to hotplug

  @type extra: string

  @param extra: extra info used by hotplug code (e.g. disk link)

  @type seq: int

  @param seq: the index of the device from master perspective

  @raise RPCFail: in case instance does not have KVM hypervisor

  """

  hyper = hypervisor.GetHypervisor(instance.hypervisor)

  try:

    hyper.HotplugSupported(instance, action, dev_type)

  except (errors.HotplugError, errors.HypervisorError), err:

    _Fail("Hotplug is not supported: %s", err)

  if action == constants.HOTPLUG_ACTION_ADD:

    fn = hyper.HotAddDevice

  elif action == constants.HOTPLUG_ACTION_REMOVE:

    fn = hyper.HotDelDevice

  elif action == constants.HOTPLUG_ACTION_MODIFY:

    fn = hyper.HotModDevice

  else:

    assert action in constants.HOTPLUG_ALL_ACTIONS

  return fn(instance, dev_type, device, extra, seq)