115 lines
4.8 KiB
Python
115 lines
4.8 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from nova.compute import manager
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from nova import test
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from nova.tests import fixtures as nova_fixtures
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from nova.tests.functional import fixtures as func_fixtures
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from nova.tests.functional import integrated_helpers
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from nova.tests.unit import fake_network
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from nova.tests.unit import fake_notifier
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from nova.tests.unit import policy_fixture
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class TestEvacuationWithSourceReturningDuringRebuild(
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test.TestCase, integrated_helpers.InstanceHelperMixin):
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"""Assert the behaviour of evacuating instances when the src returns early.
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This test asserts that evacuating instances end up in an ACTIVE state on
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the destination even when the source host comes back online during an
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evacuation while the migration record is in a pre-migrating state.
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"""
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def setUp(self):
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super(TestEvacuationWithSourceReturningDuringRebuild, self).setUp()
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self.useFixture(policy_fixture.RealPolicyFixture())
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# The NeutronFixture is needed to stub out validate_networks in API.
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self.useFixture(nova_fixtures.NeutronFixture(self))
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# This stubs out the network allocation in compute.
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fake_network.set_stub_network_methods(self)
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# We need the computes reporting into placement for the filter
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# scheduler to pick a host.
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self.useFixture(func_fixtures.PlacementFixture())
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api_fixture = self.useFixture(nova_fixtures.OSAPIFixture(
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api_version='v2.1'))
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self.api = api_fixture.admin_api
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# 2.11 is needed for force_down
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# 2.14 is needed for evacuate without onSharedStorage flag
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self.api.microversion = '2.14'
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# the image fake backend needed for image discovery
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self.useFixture(nova_fixtures.GlanceFixture(self))
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self.start_service('conductor')
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self.start_service('scheduler')
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# Start two computes
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self._start_compute('host1')
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self._start_compute('host2')
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self.image_id = self.api.get_images()[0]['id']
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self.flavor_id = self.api.get_flavors()[0]['id']
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self.addCleanup(fake_notifier.reset)
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# Stub out rebuild with a slower method allowing the src compute to be
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# restarted once the migration hits pre-migrating after claiming
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# resources on the dest.
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manager_class = manager.ComputeManager
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original_rebuild = manager_class._do_rebuild_instance
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def start_src_rebuild(self_, context, instance, *args, **kwargs):
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server = self.api.get_server(instance.uuid)
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# Start the src compute once the migration is pre-migrating.
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self._wait_for_migration_status(server, ['pre-migrating'])
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self.computes.get(self.source_compute).start()
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original_rebuild(self_, context, instance, *args, **kwargs)
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self.stub_out('nova.compute.manager.ComputeManager.'
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'_do_rebuild_instance', start_src_rebuild)
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def test_evacuation_with_source_compute_returning_during_rebuild(self):
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# Launch an instance
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server_request = {'name': 'server',
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'imageRef': self.image_id,
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'flavorRef': self.flavor_id}
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server_response = self.api.post_server({'server': server_request})
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server = self._wait_for_state_change(server_response,
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'ACTIVE')
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# Record where the instance is running before forcing the service down
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self.source_compute = server['OS-EXT-SRV-ATTR:host']
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self.computes.get(self.source_compute).stop()
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self.api.force_down_service(self.source_compute, 'nova-compute', True)
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# Start evacuating the instance from the source_host
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self.api.post_server_action(server['id'], {'evacuate': {}})
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# Wait for the instance to go into an ACTIVE state
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self._wait_for_state_change(server, 'ACTIVE')
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server = self.api.get_server(server['id'])
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host = server['OS-EXT-SRV-ATTR:host']
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migrations = self.api.get_migrations()
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# Assert that we have a single `done` migration record after the evac
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self.assertEqual(1, len(migrations))
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self.assertEqual('done', migrations[0]['status'])
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# Assert that the instance is now on the dest
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self.assertNotEqual(self.source_compute, host)
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