# Copyright 2013 Netease Corporation # All Rights Reserved. # # 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. """ Tests for availability zones """ import mock from oslo_utils.fixture import uuidsentinel import six from nova import availability_zones as az import nova.conf from nova import context from nova.db import api as db from nova import objects from nova import test CONF = nova.conf.CONF class AvailabilityZoneTestCases(test.TestCase): """Test case for aggregate based availability zone.""" def setUp(self): super(AvailabilityZoneTestCases, self).setUp() self.host = 'me' self.availability_zone = 'nova-test' self.default_az = CONF.default_availability_zone self.default_in_az = CONF.internal_service_availability_zone self.context = context.get_admin_context() self.agg = self._create_az('az_agg', self.availability_zone) def tearDown(self): self.agg.destroy() super(AvailabilityZoneTestCases, self).tearDown() def _create_az(self, agg_name, az_name): agg_meta = {'name': agg_name, 'uuid': uuidsentinel.agg_uuid, 'metadata': {'availability_zone': az_name}} agg = objects.Aggregate(self.context, **agg_meta) agg.create() agg = objects.Aggregate.get_by_id(self.context, agg.id) return agg def _update_az(self, aggregate, az_name): aggregate.update_metadata({'availability_zone': az_name}) def _create_service_with_topic(self, topic, host, disabled=False): values = { 'binary': 'nova-bin', 'host': host, 'topic': topic, 'disabled': disabled, } return db.service_create(self.context, values) def _destroy_service(self, service): return db.service_destroy(self.context, service['id']) def _add_to_aggregate(self, service, aggregate): aggregate.add_host(service['host']) def _delete_from_aggregate(self, service, aggregate): aggregate.delete_host(service['host']) def test_rest_availability_zone_reset_cache(self): az._get_cache().add('cache', 'fake_value') az.reset_cache() self.assertIsNone(az._get_cache().get('cache')) def test_update_host_availability_zone_cache(self): """Test availability zone cache could be update.""" service = self._create_service_with_topic('compute', self.host) # Create a new aggregate with an AZ and add the host to the AZ az_name = 'az1' cache_key = az._make_cache_key(self.host) agg_az1 = self._create_az('agg-az1', az_name) self._add_to_aggregate(service, agg_az1) az.update_host_availability_zone_cache(self.context, self.host) self.assertEqual('az1', az._get_cache().get(cache_key)) az.update_host_availability_zone_cache(self.context, self.host, 'az2') self.assertEqual('az2', az._get_cache().get(cache_key)) def test_set_availability_zone_compute_service(self): """Test for compute service get right availability zone.""" service = self._create_service_with_topic('compute', self.host) services = db.service_get_all(self.context) # The service is not add into aggregate, so confirm it is default # availability zone. new_service = az.set_availability_zones(self.context, services)[0] self.assertEqual(self.default_az, new_service['availability_zone']) # The service is added into aggregate, confirm return the aggregate # availability zone. self._add_to_aggregate(service, self.agg) new_service = az.set_availability_zones(self.context, services)[0] self.assertEqual(self.availability_zone, new_service['availability_zone']) self._destroy_service(service) def test_set_availability_zone_unicode_key(self): """Test set availability zone cache key is unicode.""" service = self._create_service_with_topic('network', self.host) services = db.service_get_all(self.context) az.set_availability_zones(self.context, services) self.assertIsInstance(services[0]['host'], six.text_type) cached_key = az._make_cache_key(services[0]['host']) self.assertIsInstance(cached_key, str) self._destroy_service(service) def test_set_availability_zone_not_compute_service(self): """Test not compute service get right availability zone.""" service = self._create_service_with_topic('network', self.host) services = db.service_get_all(self.context) new_service = az.set_availability_zones(self.context, services)[0] self.assertEqual(self.default_in_az, new_service['availability_zone']) self._destroy_service(service) def test_get_host_availability_zone(self): """Test get right availability zone by given host.""" self.assertEqual(self.default_az, az.get_host_availability_zone(self.context, self.host)) service = self._create_service_with_topic('compute', self.host) self._add_to_aggregate(service, self.agg) self.assertEqual(self.availability_zone, az.get_host_availability_zone(self.context, self.host)) def test_update_host_availability_zone(self): """Test availability zone could be update by given host.""" service = self._create_service_with_topic('compute', self.host) # Create a new aggregate with an AZ and add the host to the AZ az_name = 'az1' agg_az1 = self._create_az('agg-az1', az_name) self._add_to_aggregate(service, agg_az1) self.assertEqual(az_name, az.get_host_availability_zone(self.context, self.host)) # Update AZ new_az_name = 'az2' self._update_az(agg_az1, new_az_name) self.assertEqual(new_az_name, az.get_host_availability_zone(self.context, self.host)) def test_delete_host_availability_zone(self): """Test availability zone could be deleted successfully.""" service = self._create_service_with_topic('compute', self.host) # Create a new aggregate with an AZ and add the host to the AZ az_name = 'az1' agg_az1 = self._create_az('agg-az1', az_name) self._add_to_aggregate(service, agg_az1) self.assertEqual(az_name, az.get_host_availability_zone(self.context, self.host)) # Delete the AZ via deleting the aggregate self._delete_from_aggregate(service, agg_az1) self.assertEqual(self.default_az, az.get_host_availability_zone(self.context, self.host)) def test_get_availability_zones(self): """Test get_availability_zones.""" # When the param get_only_available of get_availability_zones is set # to default False, it returns two lists, zones with at least one # enabled services, and zones with no enabled services, # when get_only_available is set to True, only return a list of zones # with at least one enabled services. # Use the following test data: # # zone host enabled # nova-test host1 Yes # nova-test host2 No # nova-test2 host3 Yes # nova-test3 host4 No # host5 No agg2 = self._create_az('agg-az2', 'nova-test2') agg3 = self._create_az('agg-az3', 'nova-test3') service1 = self._create_service_with_topic('compute', 'host1', disabled=False) service2 = self._create_service_with_topic('compute', 'host2', disabled=True) service3 = self._create_service_with_topic('compute', 'host3', disabled=False) service4 = self._create_service_with_topic('compute', 'host4', disabled=True) self._create_service_with_topic('compute', 'host5', disabled=True) self._add_to_aggregate(service1, self.agg) self._add_to_aggregate(service2, self.agg) self._add_to_aggregate(service3, agg2) self._add_to_aggregate(service4, agg3) zones, not_zones = az.get_availability_zones(self.context) self.assertEqual(['nova-test', 'nova-test2'], zones) self.assertEqual(['nova-test3', 'nova'], not_zones) zones = az.get_availability_zones(self.context, True) self.assertEqual(['nova-test', 'nova-test2'], zones) zones, not_zones = az.get_availability_zones(self.context, with_hosts=True) self.assertJsonEqual(zones, [(u'nova-test2', set([u'host3'])), (u'nova-test', set([u'host1']))]) self.assertJsonEqual(not_zones, [(u'nova-test3', set([u'host4'])), (u'nova', set([u'host5']))]) def test_get_instance_availability_zone_default_value(self): """Test get right availability zone by given an instance.""" fake_inst = objects.Instance(host=self.host, availability_zone=None) self.assertEqual(self.default_az, az.get_instance_availability_zone(self.context, fake_inst)) def test_get_instance_availability_zone_from_aggregate(self): """Test get availability zone from aggregate by given an instance.""" host = 'host170' service = self._create_service_with_topic('compute', host) self._add_to_aggregate(service, self.agg) fake_inst = objects.Instance(host=host, availability_zone=self.availability_zone) self.assertEqual(self.availability_zone, az.get_instance_availability_zone(self.context, fake_inst)) @mock.patch.object(az._get_cache(), 'get') def test_get_instance_availability_zone_cache_differs(self, cache_get): host = 'host170' service = self._create_service_with_topic('compute', host) self._add_to_aggregate(service, self.agg) cache_get.return_value = self.default_az fake_inst = objects.Instance(host=host, availability_zone=self.availability_zone) self.assertEqual( self.availability_zone, az.get_instance_availability_zone(self.context, fake_inst)) def test_get_instance_availability_zone_no_host(self): """Test get availability zone from instance if host is None.""" fake_inst = objects.Instance(host=None, availability_zone='inst-az') result = az.get_instance_availability_zone(self.context, fake_inst) self.assertEqual('inst-az', result) def test_get_instance_availability_zone_no_host_set(self): """Test get availability zone from instance if host not set. This is testing the case in the compute API where the Instance object does not have the host attribute set because it's just the object that goes into the BuildRequest, it wasn't actually pulled from the DB. The instance in this case doesn't actually get inserted into the DB until it reaches conductor. So the host attribute may not be set but we expect availability_zone always will in the API because of _validate_and_build_base_options setting a default value which goes into the object. """ fake_inst = objects.Instance(availability_zone='inst-az') result = az.get_instance_availability_zone(self.context, fake_inst) self.assertEqual('inst-az', result) def test_get_instance_availability_zone_no_host_no_az(self): """Test get availability zone if neither host nor az is set.""" fake_inst = objects.Instance(host=None, availability_zone=None) result = az.get_instance_availability_zone(self.context, fake_inst) self.assertIsNone(result)