122 lines
5.6 KiB
Python
122 lines
5.6 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import mock
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from nova.compute import api as compute_api
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from nova import context as nova_context
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from nova import objects
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from nova import test
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from nova.tests.functional import integrated_helpers
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class ColdMigrationDisallowSameHost(
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integrated_helpers.ProviderUsageBaseTestCase):
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"""Tests cold migrate where the source host does not have the
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COMPUTE_SAME_HOST_COLD_MIGRATE trait.
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"""
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compute_driver = 'fake.MediumFakeDriver'
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def setUp(self):
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super(ColdMigrationDisallowSameHost, self).setUp()
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# Start one compute service which will use the fake virt driver
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# which disallows cold migration to the same host.
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self._start_compute('host1')
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def _wait_for_migrate_no_valid_host(self, error='NoValidHost'):
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event = self.notifier.wait_for_versioned_notifications(
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'compute_task.migrate_server.error')[0]
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self.assertEqual(error,
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event['payload']['nova_object.data']['reason'][
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'nova_object.data']['exception'])
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def test_cold_migrate_same_host_not_supported(self):
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"""Simple test to show that you cannot cold-migrate to the same host
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when the resource provider does not expose the
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COMPUTE_SAME_HOST_COLD_MIGRATE trait.
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"""
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server = self._create_server(networks='none')
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# The fake driver does not report COMPUTE_SAME_HOST_COLD_MIGRATE
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# so cold migration should fail since we only have one host.
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self.api.post_server_action(server['id'], {'migrate': None})
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self._wait_for_migrate_no_valid_host()
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def test_cold_migrate_same_host_old_compute_disallow(self):
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"""Upgrade compat test where the resource provider does not report
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the COMPUTE_SAME_HOST_COLD_MIGRATE trait but the compute service is
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old so the API falls back to the allow_resize_to_same_host config which
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defaults to False.
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"""
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server = self._create_server(networks='none')
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# Stub the compute service version check to make the compute service
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# appear old.
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fake_service = objects.Service()
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fake_service.version = (
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compute_api.MIN_COMPUTE_SAME_HOST_COLD_MIGRATE - 1)
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with mock.patch('nova.objects.Service.get_by_compute_host',
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return_value=fake_service) as mock_get_service:
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self.api.post_server_action(server['id'], {'migrate': None})
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mock_get_service.assert_called_once_with(
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test.MatchType(nova_context.RequestContext), 'host1')
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# Since allow_resize_to_same_host defaults to False scheduling failed
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# since there are no other hosts.
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self._wait_for_migrate_no_valid_host()
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def test_cold_migrate_same_host_old_compute_allow(self):
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"""Upgrade compat test where the resource provider does not report
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the COMPUTE_SAME_HOST_COLD_MIGRATE trait but the compute service is
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old so the API falls back to the allow_resize_to_same_host config which
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in this test is set to True.
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"""
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self.flags(allow_resize_to_same_host=True)
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server = self._create_server(networks='none')
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# Stub the compute service version check to make the compute service
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# appear old.
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fake_service = objects.Service()
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fake_service.version = (
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compute_api.MIN_COMPUTE_SAME_HOST_COLD_MIGRATE - 1)
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with mock.patch('nova.objects.Service.get_by_compute_host',
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return_value=fake_service) as mock_get_service:
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self.api.post_server_action(server['id'], {'migrate': None})
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mock_get_service.assert_called_once_with(
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test.MatchType(nova_context.RequestContext), 'host1')
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# In this case the compute is old so the API falls back to checking
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# allow_resize_to_same_host which says same-host cold migrate is
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# allowed so the scheduler sends the request to the only compute
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# available but the virt driver says same-host cold migrate is not
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# supported and raises UnableToMigrateToSelf. A reschedule is sent
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# to conductor which results in MaxRetriesExceeded since there are no
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# alternative hosts.
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self._wait_for_migrate_no_valid_host(error='MaxRetriesExceeded')
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class ColdMigrationAllowSameHost(
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integrated_helpers.ProviderUsageBaseTestCase):
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"""Tests cold migrate where the source host has the
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COMPUTE_SAME_HOST_COLD_MIGRATE trait.
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"""
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compute_driver = 'fake.SameHostColdMigrateDriver'
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def setUp(self):
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super(ColdMigrationAllowSameHost, self).setUp()
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self._start_compute('host1')
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def test_cold_migrate_same_host_supported(self):
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"""Simple test to show that you can cold-migrate to the same host
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when the resource provider exposes the COMPUTE_SAME_HOST_COLD_MIGRATE
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trait.
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"""
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server = self._create_server(networks='none')
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self.api.post_server_action(server['id'], {'migrate': None})
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server = self._wait_for_state_change(server, 'VERIFY_RESIZE')
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self.assertEqual('host1', server['OS-EXT-SRV-ATTR:host'])
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