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OpenStack Study: test_capacity_weigher.py**** CubicPower OpenStack Study ****
# Copyright 2011-2012 OpenStack Foundation # 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 Capacity Weigher. """ import mock from oslo.config import cfg from cinder import context from cinder.openstack.common.scheduler.weights import HostWeightHandler from cinder.scheduler.weights.capacity import CapacityWeigher from cinder import test from cinder.tests.scheduler import fakes CONF = cfg.CONF
**** CubicPower OpenStack Study **** class CapacityWeigherTestCase(test.TestCase):
**** CubicPower OpenStack Study **** def setUp(self): super(CapacityWeigherTestCase, self).setUp() self.host_manager = fakes.FakeHostManager() self.weight_handler = HostWeightHandler('cinder.scheduler.weights')
**** CubicPower OpenStack Study **** def _get_weighed_host(self, hosts, weight_properties=None): if weight_properties is None: weight_properties = {} return self.weight_handler.get_weighed_objects([CapacityWeigher], hosts, weight_properties)[0] @mock.patch('cinder.db.sqlalchemy.api.service_get_all_by_topic')
**** CubicPower OpenStack Study **** def _get_all_hosts(self, _mock_service_get_all_by_topic): ctxt = context.get_admin_context() fakes.mock_host_manager_db_calls(_mock_service_get_all_by_topic) host_states = self.host_manager.get_all_host_states(ctxt) _mock_service_get_all_by_topic.assert_called_once_with( ctxt, CONF.volume_topic) return host_states
**** CubicPower OpenStack Study **** def test_default_of_spreading_first(self): hostinfo_list = self._get_all_hosts() # host1: free_capacity_gb=1024, free=1024*(1-0.1) # host2: free_capacity_gb=300, free=300*(1-0.1) # host3: free_capacity_gb=512, free=256 # host4: free_capacity_gb=200, free=200*(1-0.05) # so, host1 should win: weighed_host = self._get_weighed_host(hostinfo_list) self.assertEqual(weighed_host.weight, 921.0) self.assertEqual(weighed_host.obj.host, 'host1')
**** CubicPower OpenStack Study **** def test_capacity_weight_multiplier1(self): self.flags(capacity_weight_multiplier=-1.0) hostinfo_list = self._get_all_hosts() # host1: free_capacity_gb=1024, free=-1024*(1-0.1) # host2: free_capacity_gb=300, free=-300*(1-0.1) # host3: free_capacity_gb=512, free=-256 # host4: free_capacity_gb=200, free=-200*(1-0.05) # so, host4 should win: weighed_host = self._get_weighed_host(hostinfo_list) self.assertEqual(weighed_host.weight, -190.0) self.assertEqual(weighed_host.obj.host, 'host4')
**** CubicPower OpenStack Study **** def test_capacity_weight_multiplier2(self): self.flags(capacity_weight_multiplier=2.0) hostinfo_list = self._get_all_hosts() # host1: free_capacity_gb=1024, free=1024*(1-0.1)*2 # host2: free_capacity_gb=300, free=300*(1-0.1)*2 # host3: free_capacity_gb=512, free=256*2 # host4: free_capacity_gb=200, free=200*(1-0.05)*2 # so, host1 should win: weighed_host = self._get_weighed_host(hostinfo_list) self.assertEqual(weighed_host.weight, 921.0 * 2) self.assertEqual(weighed_host.obj.host, 'host1')
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