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test_imagecache.py
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test_imagecache.py
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# Copyright 2013 OpenStack Foundation
#
# 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 oslo.config import cfg
from nova import block_device
from nova.compute import vm_states
from nova import context
from nova import objects
from nova import test
from nova.tests.unit import fake_instance
from nova.virt import imagecache
CONF = cfg.CONF
swap_bdm_128 = [block_device.BlockDeviceDict(
{'id': 1, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdb1',
'source_type': 'blank',
'destination_type': 'local',
'delete_on_termination': True,
'guest_format': 'swap',
'disk_bus': 'scsi',
'volume_size': 128,
'boot_index': -1})]
swap_bdm_256 = [block_device.BlockDeviceDict(
{'id': 1, 'instance_uuid': 'fake-instance',
'device_name': '/dev/sdb1',
'source_type': 'blank',
'destination_type': 'local',
'delete_on_termination': True,
'guest_format': 'swap',
'disk_bus': 'scsi',
'volume_size': 256,
'boot_index': -1})]
class ImageCacheManagerTests(test.NoDBTestCase):
def test_configurationi_defaults(self):
self.assertEqual(2400, CONF.image_cache_manager_interval)
self.assertEqual('_base', CONF.image_cache_subdirectory_name)
self.assertTrue(CONF.remove_unused_base_images)
self.assertEqual(24 * 3600,
CONF.remove_unused_original_minimum_age_seconds)
def test_cache_manager(self):
cache_manager = imagecache.ImageCacheManager()
self.assertTrue(cache_manager.remove_unused_base_images)
self.assertRaises(NotImplementedError,
cache_manager.update, None, [])
self.assertRaises(NotImplementedError,
cache_manager._get_base)
base_images = cache_manager._list_base_images(None)
self.assertEqual([], base_images['unexplained_images'])
self.assertEqual([], base_images['originals'])
self.assertRaises(NotImplementedError,
cache_manager._age_and_verify_cached_images,
None, [], None)
def test_list_running_instances(self):
instances = [{'image_ref': '1',
'host': CONF.host,
'id': '1',
'uuid': '123',
'vm_state': '',
'task_state': ''},
{'image_ref': '2',
'host': CONF.host,
'id': '2',
'uuid': '456',
'vm_state': '',
'task_state': ''},
{'image_ref': '2',
'kernel_id': '21',
'ramdisk_id': '22',
'host': 'remotehost',
'id': '3',
'uuid': '789',
'vm_state': '',
'task_state': ''}]
all_instances = [fake_instance.fake_instance_obj(None, **instance)
for instance in instances]
image_cache_manager = imagecache.ImageCacheManager()
self.mox.StubOutWithMock(objects.block_device.BlockDeviceMappingList,
'get_by_instance_uuid')
ctxt = context.get_admin_context()
objects.block_device.BlockDeviceMappingList.get_by_instance_uuid(
ctxt, '123').AndReturn(swap_bdm_256)
objects.block_device.BlockDeviceMappingList.get_by_instance_uuid(
ctxt, '456').AndReturn(swap_bdm_128)
objects.block_device.BlockDeviceMappingList.get_by_instance_uuid(
ctxt, '789').AndReturn(swap_bdm_128)
self.mox.ReplayAll()
# The argument here should be a context, but it's mocked out
running = image_cache_manager._list_running_instances(ctxt,
all_instances)
self.assertEqual(4, len(running['used_images']))
self.assertEqual((1, 0, ['instance-00000001']),
running['used_images']['1'])
self.assertEqual((1, 1, ['instance-00000002',
'instance-00000003']),
running['used_images']['2'])
self.assertEqual((0, 1, ['instance-00000003']),
running['used_images']['21'])
self.assertEqual((0, 1, ['instance-00000003']),
running['used_images']['22'])
self.assertIn('instance-00000001', running['instance_names'])
self.assertIn('123', running['instance_names'])
self.assertEqual(4, len(running['image_popularity']))
self.assertEqual(1, running['image_popularity']['1'])
self.assertEqual(2, running['image_popularity']['2'])
self.assertEqual(1, running['image_popularity']['21'])
self.assertEqual(1, running['image_popularity']['22'])
self.assertEqual(len(running['used_swap_images']), 2)
self.assertIn('swap_128', running['used_swap_images'])
self.assertIn('swap_256', running['used_swap_images'])
def test_list_resizing_instances(self):
instances = [{'image_ref': '1',
'host': CONF.host,
'id': '1',
'uuid': '123',
'vm_state': vm_states.RESIZED,
'task_state': None}]
all_instances = [fake_instance.fake_instance_obj(None, **instance)
for instance in instances]
image_cache_manager = imagecache.ImageCacheManager()
self.mox.StubOutWithMock(objects.block_device.BlockDeviceMappingList,
'get_by_instance_uuid')
ctxt = context.get_admin_context()
objects.block_device.BlockDeviceMappingList.get_by_instance_uuid(
ctxt, '123').AndReturn(swap_bdm_256)
self.mox.ReplayAll()
running = image_cache_manager._list_running_instances(ctxt,
all_instances)
self.assertEqual(1, len(running['used_images']))
self.assertEqual((1, 0, ['instance-00000001']),
running['used_images']['1'])
self.assertEqual(set(['instance-00000001', '123',
'instance-00000001_resize', '123_resize']),
running['instance_names'])
self.assertEqual(1, len(running['image_popularity']))
self.assertEqual(1, running['image_popularity']['1'])