105 lines
4.4 KiB
Python
105 lines
4.4 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 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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import nova.tests.unit.image.fake
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from nova.tests.unit import policy_fixture
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class TestResizeWithNoAllocationScheduler(
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test.TestCase, integrated_helpers.InstanceHelperMixin):
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"""Regression tests for bug #1741307
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Some scheduler drivers, like the old CachingScheduler driver, do not use
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Placement to make claims (allocations) against compute nodes during
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scheduling like the FilterScheduler does.
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During a cold migrate / resize, the FilterScheduler will "double up" the
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instance allocations so the instance has resource allocations made against
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both the source node and the chosen destination node. Conductor will then
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attempt to "swap" the source node allocation to the migration record. If
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using a non-Placement driver, there are no allocations for the instance on
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the source node and conductor fails. Note that if the compute running the
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instance was running Ocata code or older, then the compute itself would
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create the allocations in Placement via the ResourceTracker, but once all
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computes are upgraded to Pike or newer, the compute no longer creates
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allocations in Placement because it assumes the scheduler is doing that,
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which is not the case with these outlier scheduler drivers.
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This is a regression test to show the failure before it's fixed and then
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can be used to confirm the fix.
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"""
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microversion = 'latest'
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def setUp(self):
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super(TestResizeWithNoAllocationScheduler, 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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self.api.microversion = self.microversion
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nova.tests.unit.image.fake.stub_out_image_service(self)
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self.addCleanup(nova.tests.unit.image.fake.FakeImageService_reset)
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self.start_service('conductor')
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# Create two compute nodes/services.
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for host in ('host1', 'host2'):
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self.start_service('compute', host=host)
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scheduler_service = self.start_service('scheduler')
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# We need to mock the FilterScheduler to not use Placement so that
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# allocations won't be created during scheduling.
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scheduler_service.manager.driver.USES_ALLOCATION_CANDIDATES = False
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flavors = self.api.get_flavors()
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self.old_flavor = flavors[0]
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self.new_flavor = flavors[1]
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def test_resize(self):
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# Create our server without networking just to keep things simple.
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server_req = self._build_minimal_create_server_request(
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'test-resize', flavor_id=self.old_flavor['id'],
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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_req})
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server = self._wait_for_state_change(server, 'ACTIVE')
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original_host = server['OS-EXT-SRV-ATTR:host']
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target_host = 'host1' if original_host == 'host2' else 'host2'
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# Issue the resize request.
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post = {
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'resize': {
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'flavorRef': self.new_flavor['id']
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}
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}
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self.api.post_server_action(server['id'], post)
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# Poll the server until the resize is done.
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server = self._wait_for_state_change(server, 'VERIFY_RESIZE')
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# Assert that the server was migrated to the other host.
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self.assertEqual(target_host, server['OS-EXT-SRV-ATTR:host'])
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# Confirm the resize.
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post = {'confirmResize': None}
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self.api.post_server_action(server['id'], post,
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check_response_status=[204])
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