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The 'requested_destination', 'network_metadata', 'retry' fields in the RequestSpec object are reset when saving the object currently. When cold migrating a server, the API sets the requested_destination so conductor will pass that information to the scheduler to restrict the cold migration to that host. But the 'heal_reqspec_is_bfv' method called from the conductor makes an update to the RequestSpec which resets the requested_destination so the server could end up being cold migrated to some other host than the one that was requested by the API user. So make them not be reset when saving the object. Change-Id: I2131558f0edfe603ee1e8d8bae66a3caf5182a58 Closes-Bug: #1815153changes/71/636271/7
Takashi Natsume
3 years ago
committed by
Takashi NATSUME
4 changed files with 264 additions and 13 deletions
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# Copyright 2019 NTT Corporation |
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# |
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# 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 six |
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from nova import context |
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from nova import objects |
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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.api import client |
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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.image import fake as image_fake |
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from nova.tests.unit import policy_fixture |
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from nova.virt import fake |
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class NonPersistentFieldNotResetTest( |
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test.TestCase, integrated_helpers.InstanceHelperMixin): |
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"""Test for regression bug 1815153 |
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The bug is that the 'requested_destination' field in the RequestSpec |
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object is reset when saving the object in the 'heal_reqspec_is_bfv' |
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method in the case that a server created before Rocky which does not |
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have is_bfv field. |
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Tests the following two cases here. |
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* Cold migration with a target host without a force flag |
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* Evacuate with a target host without a force flag |
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The following two cases are not tested here because |
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'requested_destination' is not set when the 'heal_reqspec_is_bfv' method |
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is called. |
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* Live migration without a destination host. |
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* Unshelve a server |
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""" |
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def setUp(self): |
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super(NonPersistentFieldNotResetTest, self).setUp() |
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self.useFixture(policy_fixture.RealPolicyFixture()) |
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self.useFixture(nova_fixtures.NeutronFixture(self)) |
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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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# Use the latest microversion available to make sure something does |
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# not regress in new microversions; cap as necessary. |
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self.api.microversion = 'latest' |
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image_fake.stub_out_image_service(self) |
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self.addCleanup(image_fake.FakeImageService_reset) |
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self.start_service('conductor') |
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self.start_service('scheduler') |
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self.compute = {} |
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self.addCleanup(fake.restore_nodes) |
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for host in ('host1', 'host2', 'host3'): |
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fake.set_nodes([host]) |
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compute_service = self.start_service('compute', host=host) |
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self.compute.update({host: compute_service}) |
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self.ctxt = context.get_admin_context() |
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@staticmethod |
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def _get_target_host(host): |
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target_host = {'host1': 'host2', |
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'host2': 'host3', |
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'host3': 'host1'} |
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return target_host[host] |
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def _create_server(self): |
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# Create a server, it doesn't matter on which host it builds. |
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server = self._build_minimal_create_server_request( |
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self.api, 'sample-server', |
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image_uuid='155d900f-4e14-4e4c-a73d-069cbf4541e6', |
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networks='none') |
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server = self.api.post_server({'server': server}) |
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server = self._wait_for_state_change(self.api, server, 'ACTIVE') |
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return server |
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def _remove_is_bfv_in_request_spec(self, server_id): |
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# Now let's hack the RequestSpec.is_bfv field to mimic migrating an |
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# old instance created before RequestSpec.is_bfv was set in the API, |
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reqspec = objects.RequestSpec.get_by_instance_uuid(self.ctxt, |
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server_id) |
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del reqspec.is_bfv |
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reqspec.save() |
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reqspec = objects.RequestSpec.get_by_instance_uuid(self.ctxt, |
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server_id) |
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# Make sure 'is_bfv' is not set. |
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self.assertNotIn('is_bfv', reqspec) |
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def test_cold_migrate(self): |
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server = self._create_server() |
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original_host = server['OS-EXT-SRV-ATTR:host'] |
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target_host = self._get_target_host(original_host) |
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self._remove_is_bfv_in_request_spec(server['id']) |
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# Force a target host down |
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source_compute_id = self.api.get_services( |
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host=target_host, binary='nova-compute')[0]['id'] |
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self.compute[target_host].stop() |
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self.api.put_service( |
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source_compute_id, {'forced_down': 'true'}) |
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# Cold migrate a server with a target host. |
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# If requested_destination is reset, the server is moved to a host |
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# that is not a requested target host. |
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# In that case, the response code is 202. |
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# If requested_destination is not reset, no valid host error (400) is |
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# returned because the target host is down. |
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ex = self.assertRaises(client.OpenStackApiException, |
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self.api.post_server_action, |
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server['id'], |
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{'migrate': {'host': target_host}}) |
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self.assertEqual(400, ex.response.status_code) |
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self.assertIn('No valid host was found. No valid host found ' |
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'for cold migrate', six.text_type(ex)) |
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# Make sure 'is_bfv' is set. |
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reqspec = objects.RequestSpec.get_by_instance_uuid(self.ctxt, |
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server['id']) |
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self.assertIn('is_bfv', reqspec) |
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self.assertIs(reqspec.is_bfv, False) |
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def test_evacuate(self): |
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server = self._create_server() |
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original_host = server['OS-EXT-SRV-ATTR:host'] |
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target_host = self._get_target_host(original_host) |
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self._remove_is_bfv_in_request_spec(server['id']) |
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# Force source and target hosts down |
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for host in (original_host, target_host): |
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source_compute_id = self.api.get_services( |
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host=host, binary='nova-compute')[0]['id'] |
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self.compute[host].stop() |
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self.api.put_service( |
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source_compute_id, {'forced_down': 'true'}) |
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# Evacuate a server with a target host. |
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# If requested_destination is reset, the server is moved to a host |
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# that is not the target host. |
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# Its status becomes 'ACTIVE'. |
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# If requested_destination is not reset, a status of the server |
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# becomes 'ERROR' because the target host is down. |
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self.api.post_server_action( |
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server['id'], {'evacuate': {'host': target_host}}) |
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expected_params = {'OS-EXT-SRV-ATTR:host': original_host, |
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'status': 'ERROR'} |
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server = self._wait_for_server_parameter(self.api, server, |
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expected_params) |
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# Make sure 'is_bfv' is set. |
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reqspec = objects.RequestSpec.get_by_instance_uuid(self.ctxt, |
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server['id']) |
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self.assertIn('is_bfv', reqspec) |
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self.assertIs(reqspec.is_bfv, False) |
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