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# Copyright 2018 Red Hat, Inc.
#
# 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_utils.fixture import uuidsentinel as uuids
from nova import exception
from nova.tests import fixtures as nova_fixtures
from nova.tests.functional import integrated_helpers
from nova.tests.unit import fake_notifier
class FakeCinderError(object):
"""Poor man's Mock because we're stubbing out and not mock.patching. Stubs
out attachment_delete. We keep a raise and call count to simulate a single
volume error while being able to assert that we still got called for all
of an instance's volumes.
"""
def __init__(self):
self.raise_count = 0
self.call_count = 0
def __call__(self, *args, **kwargs):
self.call_count += 1
if self.raise_count == 0:
self.raise_count += 1
raise exception.CinderConnectionFailed(reason='Fake Cinder error')
class LiveMigrationCinderFailure(integrated_helpers._IntegratedTestBase):
api_major_version = 'v2.1'
microversion = 'latest'
def setUp(self):
super(LiveMigrationCinderFailure, self).setUp()
fake_notifier.stub_notifier(self)
self.addCleanup(fake_notifier.reset)
# Start a second compute node (the first one was started for us by
# _IntegratedTestBase. set_nodes() is needed to avoid duplicate
# nodenames. See comments in test_bug_1702454.py.
self.compute2 = self.start_service('compute', host='host2')
def test_live_migrate_attachment_delete_fails(self):
self.useFixture(nova_fixtures.CinderFixture(self))
server = self.api.post_server({
'server': {
'flavorRef': 1,
'imageRef': '155d900f-4e14-4e4c-a73d-069cbf4541e6',
'name': 'live-migrate-attachment-delete-fail-test',
'networks': 'none',
'block_device_mapping_v2': [
{'boot_index': 0,
'uuid': uuids.broken_volume,
'source_type': 'volume',
'destination_type': 'volume'},
{'boot_index': 1,
'uuid': uuids.working_volume,
'source_type': 'volume',
'destination_type': 'volume'}]}})
server = self._wait_for_state_change(server, 'ACTIVE')
source = server['OS-EXT-SRV-ATTR:host']
if source == self.compute.host:
dest = self.compute2.host
else:
dest = self.compute.host
post = {
'os-migrateLive': {
'host': dest,
'block_migration': False,
}
}
stub_attachment_delete = FakeCinderError()
self.stub_out('nova.volume.cinder.API.attachment_delete',
stub_attachment_delete)
self.api.post_server_action(server['id'], post)
self._wait_for_server_parameter(server,
{'OS-EXT-SRV-ATTR:host': dest,
'status': 'ACTIVE'})
self.assertEqual(2, stub_attachment_delete.call_count)
self.assertEqual(1, stub_attachment_delete.raise_count)
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