OpenStack Compute (Nova)
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# 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 nova import test
from nova.tests import fixtures as nova_fixtures
from nova.tests.functional import integrated_helpers
import nova.tests.unit.image.fake
from nova.tests.unit import policy_fixture
class TestLocalDeleteAllocations(test.TestCase,
integrated_helpers.InstanceHelperMixin):
def setUp(self):
super(TestLocalDeleteAllocations, self).setUp()
self.useFixture(policy_fixture.RealPolicyFixture())
# The NeutronFixture is needed to show security groups for a server.
self.useFixture(nova_fixtures.NeutronFixture(self))
api_fixture = self.useFixture(nova_fixtures.OSAPIFixture(
api_version='v2.1'))
self.api = api_fixture.api
self.admin_api = api_fixture.admin_api
# We need the latest microversion to force-down the compute service
self.admin_api.microversion = 'latest'
# the image fake backend needed for image discovery
nova.tests.unit.image.fake.stub_out_image_service(self)
self.start_service('conductor')
self.start_service('consoleauth')
self.start_service('scheduler')
self.image_id = self.api.get_images()[0]['id']
self.flavor_id = self.api.get_flavors()[0]['id']
@staticmethod
def _get_usages(placement_api, rp_uuid):
fmt = '/resource_providers/%(uuid)s/usages'
resp = placement_api.get(fmt % {'uuid': rp_uuid})
return resp.body['usages']
def test_local_delete_removes_allocations_after_compute_restart(self):
"""Tests that allocations are removed after a local delete.
This tests the scenario where a server is local deleted (because the
compute host is down) and we want to make sure that its allocations
have been cleaned up once the nova-compute service restarts.
In this scenario we conditionally use the PlacementFixture to simulate
the case that nova-api isn't configured to talk to placement.
"""
# Get allocations, make sure they are 0.
with nova_fixtures.PlacementFixture() as placement:
compute = self.start_service('compute')
placement_api = placement.api
resp = placement_api.get('/resource_providers')
rp_uuid = resp.body['resource_providers'][0]['uuid']
usages_before = self._get_usages(placement_api, rp_uuid)
for usage in usages_before.values():
self.assertEqual(0, usage)
# Create a server.
server = self._build_minimal_create_server_request(self.api,
'local-delete-test', self.image_id, self.flavor_id, 'none')
server = self.admin_api.post_server({'server': server})
server = self._wait_for_state_change(self.api, server, 'ACTIVE')
# Assert usages are non zero now.
usages_during = self._get_usages(placement_api, rp_uuid)
for usage in usages_during.values():
self.assertNotEqual(0, usage)
# Force-down compute to trigger local delete.
compute.stop()
compute_service_id = self.admin_api.get_services(
host=compute.host, binary='nova-compute')[0]['id']
self.admin_api.put_service(compute_service_id,
{'forced_down': True})
# Delete the server (will be a local delete because compute is down).
self.api.delete_server(server['id'])
self._wait_until_deleted(server)
with nova_fixtures.PlacementFixture() as placement:
placement_api = placement.api
# Assert usages are still non-zero.
usages_during = self._get_usages(placement_api, rp_uuid)
for usage in usages_during.values():
self.assertNotEqual(0, usage)
# Start the compute service again. Before it comes up, it will
# call the update_available_resource code in the ResourceTracker
# which is what "heals" the allocations for the deleted instance.
compute.start()
# Get the allocations again to check against the original.
usages_after = self._get_usages(placement_api, rp_uuid)
# They should match.
self.assertEqual(usages_before, usages_after)
def test_local_delete_removes_allocations_from_api(self):
"""Tests that the compute API deletes allocations when the compute
service on which the instance was running is down.
"""
placement_api = self.useFixture(nova_fixtures.PlacementFixture()).api
compute = self.start_service('compute')
# Get allocations, make sure they are 0.
resp = placement_api.get('/resource_providers')
rp_uuid = resp.body['resource_providers'][0]['uuid']
usages_before = self._get_usages(placement_api, rp_uuid)
for usage in usages_before.values():
self.assertEqual(0, usage)
# Create a server.
server = self._build_minimal_create_server_request(self.api,
'local-delete-test', self.image_id, self.flavor_id, 'none')
server = self.admin_api.post_server({'server': server})
server = self._wait_for_state_change(self.api, server, 'ACTIVE')
# Assert usages are non zero now.
usages_during = self._get_usages(placement_api, rp_uuid)
for usage in usages_during.values():
self.assertNotEqual(0, usage)
# Force-down compute to trigger local delete.
compute.stop()
compute_service_id = self.admin_api.get_services(
host=compute.host, binary='nova-compute')[0]['id']
self.admin_api.put_service(compute_service_id, {'forced_down': True})
# Delete the server (will be a local delete because compute is down).
self.api.delete_server(server['id'])
self._wait_until_deleted(server)
# Get the allocations again to make sure they were deleted.
usages_after = self._get_usages(placement_api, rp_uuid)
# They should match.
self.assertEqual(usages_before, usages_after)