openstack/nova
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Add functional test for deleting a compute service

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This adds a functional test which asserts the things
related to bug 1756179 where deleting a compute service
does not also delete the related host mapping or resource
provider resources.

Also related to bug 1763183 in that it should not be
possible to delete a compute service that has instances
running on it since that will mess up resource tracking
in Placement.

Change-Id: I519c5abfe24b154998f481c8a86db239a75d4729
Related-Bug: #1756179
Related-Bug: #1763183
This commit is contained in:
Matt Riedemann 2018-04-11 16:00:59 -04:00
parent 324899c621
commit a80ac96362
1 changed files with 114 additions and 0 deletions
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114
nova/tests/functional/wsgi/test_services.py Normal file
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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 context as nova_context
from nova import objects
from nova import rc_fields
from nova.tests.functional import test_servers
class TestServicesAPI(test_servers.ProviderUsageBaseTestCase):
compute_driver = 'fake.SmallFakeDriver'
def test_compute_service_delete_ensure_related_cleanup(self):
"""Tests deleting a compute service and the related cleanup associated
with that like the compute_nodes table entry, removing the host
from any aggregates, the host mapping in the API DB and the associated
resource provider in Placement.
"""
compute = self._start_compute('host1')
# Make sure our compute host is represented as expected.
services = self.admin_api.get_services(binary='nova-compute')
self.assertEqual(1, len(services))
service = services[0]
# Now create a host aggregate and add our host to it.
aggregate = self.admin_api.post_aggregate(
{'aggregate': {'name': 'agg1'}})
self.admin_api.add_host_to_aggregate(aggregate['id'], service['host'])
# Make sure the host is in the aggregate.
aggregate = self.admin_api.api_get(
'/os-aggregates/%s' % aggregate['id']).body['aggregate']
self.assertEqual([service['host']], aggregate['hosts'])
rp_uuid = self._get_provider_uuid_by_host(service['host'])
# We'll know there is a host mapping implicitly if os-hypervisors
# returned something in _get_provider_uuid_by_host, but let's also
# make sure the host mapping is there like we expect.
ctxt = nova_context.get_admin_context()
objects.HostMapping.get_by_host(ctxt, service['host'])
# Make sure there is a resource provider for that compute node based
# on the uuid.
resp = self.placement_api.get('/resource_providers/%s' % rp_uuid)
self.assertEqual(200, resp.status)
# Make sure the resource provider has inventory.
inventories = self._get_provider_inventory(rp_uuid)
# Expect a minimal set of inventory for the fake virt driver.
for resource_class in [rc_fields.ResourceClass.VCPU,
rc_fields.ResourceClass.MEMORY_MB,
rc_fields.ResourceClass.DISK_GB]:
self.assertIn(resource_class, inventories)
# Now create a server so that the resource provider has some allocation
# records.
flavor = self.api.get_flavors()[0]
server = self._boot_and_check_allocations(flavor, service['host'])
# Now the fun part, delete the compute service and make sure related
# resources are cleaned up, like the compute node, host mapping, and
# resource provider. We have to first stop the compute service so
# it doesn't recreate the compute node during the
# update_available_resource periodic task.
self.admin_api.put_service(service['id'], {'forced_down': True})
compute.stop()
# FIXME(mriedem): This is bug 1763183 where the compute node has
# an instance running on it but we allow you to delete the service
# and compute node anyway, which will affect the allocations for the
# instance and orphans the compute node resource provider in Placement.
# Once the bug is fixed, this should fail until the instance is either
# migrated or deleted.
self.admin_api.api_delete('/os-services/%s' % service['id'])
# Make sure the service is deleted.
services = self.admin_api.get_services(binary='nova-compute')
self.assertEqual(0, len(services))
# Make sure the host was removed from the aggregate.
aggregate = self.admin_api.api_get(
'/os-aggregates/%s' % aggregate['id']).body['aggregate']
self.assertEqual([], aggregate['hosts'])
# Trying to get the hypervisor should result in a 404.
self.admin_api.api_get(
'os-hypervisors?hypervisor_hostname_pattern=%s' % service['host'],
check_response_status=[404])
# FIXME(mriedem): This is bug 1756179 where the host mapping is not
# deleted. Once the bug is fixed, we should be able to change this
# to assert that HostMappingNotFound is raised.
objects.HostMapping.get_by_host(ctxt, service['host'])
# FIXME(mriedem): This is bug 1756179 where the compute node resource
# provider is not deleted. Once the bug is fixed, this should result
# in a 404 response.
resp = self.placement_api.get('/resource_providers/%s' % rp_uuid)
self.assertEqual(200, resp.status)
# Assert the allocations still exist for the server against the
# compute node resource provider. Once the bug is fixed, there should
# be no allocations for the server.
allocations = self._get_allocations_by_server_uuid(server['id'])
self.assertEqual(1, len(allocations))
allocation = allocations[rp_uuid]['resources']
self.assertFlavorMatchesAllocation(flavor, allocation)