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# 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
"""
from oslo.config import cfg
from nova import availability_zones as az
from nova import context
from nova import db
from nova import test
from nova.tests.api.openstack import fakes
CONF = cfg.CONF
CONF.import_opt('internal_service_availability_zone',
'nova.availability_zones')
CONF.import_opt('default_availability_zone',
'nova.availability_zones')
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):
db.aggregate_delete(self.context, self.agg['id'])
super(AvailabilityZoneTestCases, self).tearDown()
def _create_az(self, agg_name, az_name):
agg_meta = {'name': agg_name}
agg = db.aggregate_create(self.context, agg_meta)
metadata = {'availability_zone': az_name}
db.aggregate_metadata_add(self.context, agg['id'], metadata)
return agg
def _update_az(self, aggregate, az_name):
metadata = {'availability_zone': az_name}
db.aggregate_update(self.context, aggregate['id'], metadata)
def _create_service_with_topic(self, topic, host, disabled=False):
values = {
'binary': '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):
return db.aggregate_host_add(self.context,
aggregate['id'], service['host'])
def _delete_from_aggregate(self, service, aggregate):
return db.aggregate_host_delete(self.context,
aggregate['id'], service['host'])
def test_rest_availability_zone_reset_cache(self):
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(az._get_cache().get(cache_key), 'az1')
az.update_host_availability_zone_cache(self.context, self.host, 'az2')
self.assertEqual(az._get_cache().get(cache_key), 'az2')
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(new_service['availability_zone'],
self.default_az)
# 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(new_service['availability_zone'],
self.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)
new_service = az.set_availability_zones(self.context, services)[0]
self.assertEqual(type(services[0]['host']), unicode)
cached_key = az._make_cache_key(services[0]['host'])
self.assertEqual(type(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(new_service['availability_zone'],
self.default_in_az)
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 servies.
# Use the following test data:
#
# zone host enabled
# nova-test host1 Yes
# nova-test host2 No
# nova-test2 host3 Yes
# nova-test3 host4 No
# <default> 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(zones, ['nova-test', 'nova-test2'])
self.assertEqual(not_zones, ['nova-test3', 'nova'])
zones = az.get_availability_zones(self.context, True)
self.assertEqual(zones, ['nova-test', 'nova-test2'])
def test_get_instance_availability_zone_default_value(self):
"""Test get right availability zone by given an instance."""
fake_inst_id = 162
fake_inst = fakes.stub_instance(fake_inst_id, host=self.host)
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_id = 174
fake_inst = fakes.stub_instance(fake_inst_id, host=host)
self.assertEqual(self.availability_zone,
az.get_instance_availability_zone(self.context, fake_inst))
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