117 lines
4.3 KiB
Python
117 lines
4.3 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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from unittest import mock
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from cinder.common import constants
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from cinder import context
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from cinder.db.sqlalchemy import api
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from cinder.scheduler import weights
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from cinder.tests.unit import fake_constants
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from cinder.tests.unit.scheduler import fakes
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from cinder.tests.unit import test
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from cinder.volume import volume_utils
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def fake_volume_data_get_for_host(context, host, count_only=False):
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host = volume_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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uid = fake_constants.USER_ID
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pid = fake_constants.PROJECT_ID
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self.context = context.RequestContext(user_id=uid,
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project_id=pid,
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is_admin=False,
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read_deleted="no",
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overwrite=False)
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self.host_manager = fakes.FakeHostManager()
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self.weight_handler = weights.OrderedHostWeightHandler(
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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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[weights.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')
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def _get_all_backends(self, _mock_service_get_all, 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,
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disabled=disabled)
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backend_states = self.host_manager.get_all_backend_states(ctxt)
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_mock_service_get_all.assert_called_once_with(
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ctxt,
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None, # backend_match_level
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topic=constants.VOLUME_TOPIC,
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frozen=False,
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disabled=disabled)
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return backend_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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backend_info_list = self._get_all_backends()
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# host1: 1 volume Norm=0.0
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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 Norm=-1.0
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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(backend_info_list)
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self.assertEqual(0.0, weighed_host.weight)
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self.assertEqual('host1',
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volume_utils.extract_host(weighed_host.obj.host))
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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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backend_info_list = self._get_all_backends()
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# host1: 1 volume Norm=0
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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 Norm=1
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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(backend_info_list)
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self.assertEqual(1.0, weighed_host.weight)
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self.assertEqual('host5',
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volume_utils.extract_host(weighed_host.obj.host))
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