def unrescue_instance(self, instance):
self.power_off(instance)
root_vhd_path = self._pathutils.lookup_root_vhd_path(instance.name)
rescue_vhd_path = self._pathutils.lookup_root_vhd_path(instance.name,
rescue=True)
if (instance.vm_state == vm_states.RESCUED and
not (rescue_vhd_path and root_vhd_path)):
err_msg = _('Missing instance root and/or rescue image.')
raise exception.InstanceNotRescuable(reason=err_msg,
instance_id=instance.uuid)
vm_gen = self._vmutils.get_vm_generation(instance.name)
controller_type = VM_GENERATIONS_CONTROLLER_TYPES[vm_gen]
self._vmutils.detach_vm_disk(instance.name, root_vhd_path,
is_physical=False)
if rescue_vhd_path:
self._vmutils.detach_vm_disk(instance.name, rescue_vhd_path,
is_physical=False)
fileutils.delete_if_exists(rescue_vhd_path)
self._attach_drive(instance.name, root_vhd_path, 0,
self._ROOT_DISK_CTRL_ADDR, controller_type)
self._detach_config_drive(instance.name, rescue=True, delete=True)
# Reattach the configdrive, if exists and not already attached.
configdrive_path = self._pathutils.lookup_configdrive_path(
instance.name)
if configdrive_path and not self._vmutils.is_disk_attached(
configdrive_path, is_physical=False):
self.attach_config_drive(instance, configdrive_path, vm_gen)
self.power_on(instance)
def test_rescue_raises_unrescuable(self, mock_rescue):
mock_rescue.side_effect = exception.InstanceNotRescuable(
'fake message')
body = dict(rescue=None)
self.assertRaises(webob.exc.HTTPBadRequest,
self.controller._rescue,
self.fake_req, UUID, body=body)
self.assertTrue(mock_rescue.called)
def _rescue_instance(self, context, instance, network_info, image_meta,
rescue_password):
rescue_image_id = image_meta.id or instance.image_ref
rescue_vhd_path = self._create_root_vhd(
context, instance, rescue_image_id=rescue_image_id)
rescue_vm_gen = self.get_image_vm_generation(instance.uuid,
image_meta)
vm_gen = self._vmutils.get_vm_generation(instance.name)
if rescue_vm_gen != vm_gen:
err_msg = _('The requested rescue image requires a different VM '
'generation than the actual rescued instance. '
'Rescue image VM generation: %(rescue_vm_gen)s. '
'Rescued instance VM generation: %(vm_gen)s.') % dict(
rescue_vm_gen=rescue_vm_gen,
vm_gen=vm_gen)
raise exception.ImageUnacceptable(reason=err_msg,
image_id=rescue_image_id)
root_vhd_path = self._pathutils.lookup_root_vhd_path(instance.name)
if not root_vhd_path:
err_msg = _('Instance root disk image could not be found. '
'Rescuing instances booted from volume is '
'not supported.')
raise exception.InstanceNotRescuable(reason=err_msg,
instance_id=instance.uuid)
controller_type = VM_GENERATIONS_CONTROLLER_TYPES[vm_gen]
self._vmutils.detach_vm_disk(instance.name, root_vhd_path,
is_physical=False)
self._attach_drive(instance.name, rescue_vhd_path, 0,
self._ROOT_DISK_CTRL_ADDR, controller_type)
self._vmutils.attach_scsi_drive(instance.name, root_vhd_path,
drive_type=constants.DISK)
if configdrive.required_by(instance):
self._detach_config_drive(instance.name)
rescue_configdrive_path = self._create_config_drive(
context,
instance,
injected_files=None,
admin_password=rescue_password,
network_info=network_info,
rescue=True)
self.attach_config_drive(instance, rescue_configdrive_path,
vm_gen)
self.power_on(instance)
def fake_rescue(*args, **kwargs):
raise exception.InstanceNotRescuable('fake message')
