108 lines
3.8 KiB
Python
108 lines
3.8 KiB
Python
# Copyright 2014 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Tests For Volume Number Weigher.
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"""
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import mock
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from oslo_config import cfg
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from cinder import context
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from cinder.db.sqlalchemy import api
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from cinder.openstack.common.scheduler import weights
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from cinder.scheduler.weights import volume_number
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from cinder import test
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from cinder.tests.scheduler import fakes
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from cinder.volume import utils
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CONF = cfg.CONF
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def fake_volume_data_get_for_host(context, host, count_only=False):
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host = utils.extract_host(host)
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if host == 'host1':
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return 1
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elif host == 'host2':
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return 2
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elif host == 'host3':
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return 3
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elif host == 'host4':
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return 4
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elif host == 'host5':
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return 5
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else:
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return 6
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class VolumeNumberWeigherTestCase(test.TestCase):
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def setUp(self):
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super(VolumeNumberWeigherTestCase, self).setUp()
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self.context = context.get_admin_context()
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self.host_manager = fakes.FakeHostManager()
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self.weight_handler = weights.HostWeightHandler(
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'cinder.scheduler.weights')
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def _get_weighed_host(self, hosts, weight_properties=None):
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if weight_properties is None:
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weight_properties = {'context': self.context}
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return self.weight_handler.get_weighed_objects(
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[volume_number.VolumeNumberWeigher],
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hosts,
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weight_properties)[0]
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@mock.patch('cinder.db.sqlalchemy.api.service_get_all_by_topic')
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def _get_all_hosts(self, _mock_service_get_all_by_topic, disabled=False):
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ctxt = context.get_admin_context()
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fakes.mock_host_manager_db_calls(_mock_service_get_all_by_topic,
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disabled=disabled)
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host_states = self.host_manager.get_all_host_states(ctxt)
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_mock_service_get_all_by_topic.assert_called_once_with(
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ctxt, CONF.volume_topic, disabled=disabled)
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return host_states
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def test_volume_number_weight_multiplier1(self):
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self.flags(volume_number_multiplier=-1.0)
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hostinfo_list = self._get_all_hosts()
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# host1: 1 volume
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# host2: 2 volumes
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# host3: 3 volumes
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# host4: 4 volumes
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# host5: 5 volumes
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# so, host1 should win:
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with mock.patch.object(api, 'volume_data_get_for_host',
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fake_volume_data_get_for_host):
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weighed_host = self._get_weighed_host(hostinfo_list)
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self.assertEqual(weighed_host.weight, -1.0)
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self.assertEqual(utils.extract_host(weighed_host.obj.host),
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'host1')
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def test_volume_number_weight_multiplier2(self):
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self.flags(volume_number_multiplier=1.0)
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hostinfo_list = self._get_all_hosts()
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# host1: 1 volume
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# host2: 2 volumes
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# host3: 3 volumes
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# host4: 4 volumes
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# host5: 5 volumes
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# so, host5 should win:
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with mock.patch.object(api, 'volume_data_get_for_host',
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fake_volume_data_get_for_host):
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weighed_host = self._get_weighed_host(hostinfo_list)
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self.assertEqual(weighed_host.weight, 5.0)
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self.assertEqual(utils.extract_host(weighed_host.obj.host),
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'host5')
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