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# Copyright 2014 Cloudbase Solutions Srl
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from os_win import exceptions as os_win_exc
from unittest import mock
from oslo_config import cfg
from nova import exception
from nova.objects import migrate_data as migrate_data_obj
from nova.tests.unit import fake_instance
from nova.tests.unit.virt.hyperv import test_base
from nova.virt.hyperv import livemigrationops
from nova.virt.hyperv import serialconsoleops
CONF = cfg.CONF
class LiveMigrationOpsTestCase(test_base.HyperVBaseTestCase):
"""Unit tests for the Hyper-V LiveMigrationOps class."""
def setUp(self):
super(LiveMigrationOpsTestCase, self).setUp()
self.context = 'fake_context'
self._livemigrops = livemigrationops.LiveMigrationOps()
self._livemigrops._livemigrutils = mock.MagicMock()
self._livemigrops._pathutils = mock.MagicMock()
self._livemigrops._block_dev_man = mock.MagicMock()
self._pathutils = self._livemigrops._pathutils
@mock.patch.object(serialconsoleops.SerialConsoleOps,
'stop_console_handler')
@mock.patch('nova.virt.hyperv.vmops.VMOps.copy_vm_dvd_disks')
def _test_live_migration(self, mock_copy_dvd_disk,
mock_stop_console_handler,
side_effect=None,
shared_storage=False,
migrate_data_received=True,
migrate_data_version='1.1'):
mock_instance = fake_instance.fake_instance_obj(self.context)
mock_post = mock.MagicMock()
mock_recover = mock.MagicMock()
mock_copy_logs = self._livemigrops._pathutils.copy_vm_console_logs
fake_dest = mock.sentinel.DESTINATION
mock_check_shared_inst_dir = (
self._pathutils.check_remote_instances_dir_shared)
mock_check_shared_inst_dir.return_value = shared_storage
self._livemigrops._livemigrutils.live_migrate_vm.side_effect = [
side_effect]
if migrate_data_received:
migrate_data = migrate_data_obj.HyperVLiveMigrateData()
if migrate_data_version != '1.0':
migrate_data.is_shared_instance_path = shared_storage
else:
migrate_data = None
self._livemigrops.live_migration(context=self.context,
instance_ref=mock_instance,
dest=fake_dest,
post_method=mock_post,
recover_method=mock_recover,
block_migration=(
mock.sentinel.block_migr),
migrate_data=migrate_data)
if side_effect is os_win_exc.HyperVException:
mock_recover.assert_called_once_with(self.context, mock_instance,
fake_dest,
migrate_data)
mock_post.assert_not_called()
else:
post_call_args = mock_post.call_args_list
self.assertEqual(1, len(post_call_args))
post_call_args_list = post_call_args[0][0]
self.assertEqual((self.context, mock_instance,
fake_dest, mock.sentinel.block_migr),
post_call_args_list[:-1])
# The last argument, the migrate_data object, should be created
# by the callee if not received.
migrate_data_arg = post_call_args_list[-1]
self.assertIsInstance(
migrate_data_arg,
migrate_data_obj.HyperVLiveMigrateData)
self.assertEqual(shared_storage,
migrate_data_arg.is_shared_instance_path)
if not migrate_data_received or migrate_data_version == '1.0':
mock_check_shared_inst_dir.assert_called_once_with(fake_dest)
else:
self.assertFalse(mock_check_shared_inst_dir.called)
mock_stop_console_handler.assert_called_once_with(mock_instance.name)
if not shared_storage:
mock_copy_logs.assert_called_once_with(mock_instance.name,
fake_dest)
mock_copy_dvd_disk.assert_called_once_with(mock_instance.name,
fake_dest)
else:
self.assertFalse(mock_copy_logs.called)
self.assertFalse(mock_copy_dvd_disk.called)
mock_live_migr = self._livemigrops._livemigrutils.live_migrate_vm
mock_live_migr.assert_called_once_with(
mock_instance.name,
fake_dest,
migrate_disks=not shared_storage)
def test_live_migration(self):
self._test_live_migration(migrate_data_received=False)
def test_live_migration_old_migrate_data_version(self):
self._test_live_migration(migrate_data_version='1.0')
def test_live_migration_exception(self):
self._test_live_migration(side_effect=os_win_exc.HyperVException)
def test_live_migration_shared_storage(self):
self._test_live_migration(shared_storage=True)
@mock.patch('nova.virt.hyperv.volumeops.VolumeOps.get_disk_path_mapping')
@mock.patch('nova.virt.hyperv.imagecache.ImageCache.get_cached_image')
@mock.patch('nova.virt.hyperv.volumeops.VolumeOps.connect_volumes')
def _test_pre_live_migration(self, mock_initialize_connection,
mock_get_cached_image,
mock_get_disk_path_mapping,
phys_disks_attached=True):
mock_instance = fake_instance.fake_instance_obj(self.context)
mock_instance.image_ref = "fake_image_ref"
mock_get_disk_path_mapping.return_value = (
mock.sentinel.disk_path_mapping if phys_disks_attached
else None)
bdman = self._livemigrops._block_dev_man
mock_is_boot_from_vol = bdman.is_boot_from_volume
mock_is_boot_from_vol.return_value = None
CONF.set_override('use_cow_images', True)
self._livemigrops.pre_live_migration(
self.context, mock_instance,
block_device_info=mock.sentinel.BLOCK_INFO,
network_info=mock.sentinel.NET_INFO)
check_config = (
self._livemigrops._livemigrutils.check_live_migration_config)
check_config.assert_called_once_with()
mock_is_boot_from_vol.assert_called_once_with(
mock.sentinel.BLOCK_INFO)
mock_get_cached_image.assert_called_once_with(self.context,
mock_instance)
mock_initialize_connection.assert_called_once_with(
mock.sentinel.BLOCK_INFO)
mock_get_disk_path_mapping.assert_called_once_with(
mock.sentinel.BLOCK_INFO)
if phys_disks_attached:
livemigrutils = self._livemigrops._livemigrutils
livemigrutils.create_planned_vm.assert_called_once_with(
mock_instance.name,
mock_instance.host,
mock.sentinel.disk_path_mapping)
def test_pre_live_migration(self):
self._test_pre_live_migration()
def test_pre_live_migration_invalid_disk_mapping(self):
self._test_pre_live_migration(phys_disks_attached=False)
@mock.patch('nova.virt.hyperv.volumeops.VolumeOps.disconnect_volumes')
def _test_post_live_migration(self, mock_disconnect_volumes,
shared_storage=False):
migrate_data = migrate_data_obj.HyperVLiveMigrateData(
is_shared_instance_path=shared_storage)
self._livemigrops.post_live_migration(
self.context, mock.sentinel.instance,
mock.sentinel.block_device_info,
migrate_data)
mock_disconnect_volumes.assert_called_once_with(
mock.sentinel.block_device_info)
mock_get_inst_dir = self._pathutils.get_instance_dir
if not shared_storage:
mock_get_inst_dir.assert_called_once_with(
mock.sentinel.instance.name,
create_dir=False, remove_dir=True)
else:
self.assertFalse(mock_get_inst_dir.called)
def test_post_block_migration(self):
self._test_post_live_migration()
def test_post_live_migration_shared_storage(self):
self._test_post_live_migration(shared_storage=True)
@mock.patch.object(migrate_data_obj, 'HyperVLiveMigrateData')
def test_check_can_live_migrate_destination(self, mock_migr_data_cls):
mock_instance = fake_instance.fake_instance_obj(self.context)
migr_data = self._livemigrops.check_can_live_migrate_destination(
mock.sentinel.context, mock_instance, mock.sentinel.src_comp_info,
mock.sentinel.dest_comp_info)
mock_check_shared_inst_dir = (
self._pathutils.check_remote_instances_dir_shared)
mock_check_shared_inst_dir.assert_called_once_with(mock_instance.host)
self.assertEqual(mock_migr_data_cls.return_value, migr_data)
self.assertEqual(mock_check_shared_inst_dir.return_value,
migr_data.is_shared_instance_path)
@mock.patch('nova.virt.hyperv.vmops.VMOps.plug_vifs')
def test_post_live_migration_at_destination(self, mock_plug_vifs):
self._livemigrops.post_live_migration_at_destination(
self.context, mock.sentinel.instance,
network_info=mock.sentinel.NET_INFO,
block_migration=mock.sentinel.BLOCK_INFO)
mock_plug_vifs.assert_called_once_with(mock.sentinel.instance,
mock.sentinel.NET_INFO)
def test_check_can_live_migrate_destination_exception(self):
mock_instance = fake_instance.fake_instance_obj(self.context)
mock_check = self._pathutils.check_remote_instances_dir_shared
mock_check.side_effect = exception.FileNotFound(file_path='C:\\baddir')
self.assertRaises(
exception.MigrationPreCheckError,
self._livemigrops.check_can_live_migrate_destination,
mock.sentinel.context, mock_instance, mock.sentinel.src_comp_info,
mock.sentinel.dest_comp_info)
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