213 lines
7.8 KiB
Python
213 lines
7.8 KiB
Python
# Copyright 2011-2012 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 Scheduler weights.
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"""
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from nova import context
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from nova import exception
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from nova.openstack.common.fixture import mockpatch
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from gantt.scheduler import weights
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from gantt import test
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from gantt.tests import matchers
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from gantt.tests.scheduler import fakes
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class TestWeighedHost(test.NoDBTestCase):
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def test_dict_conversion(self):
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host_state = fakes.FakeHostState('somehost', None, {})
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host = weights.WeighedHost(host_state, 'someweight')
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expected = {'weight': 'someweight',
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'host': 'somehost'}
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self.assertThat(host.to_dict(), matchers.DictMatches(expected))
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def test_all_weighers(self):
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classes = weights.all_weighers()
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class_names = [cls.__name__ for cls in classes]
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self.assertEqual(len(classes), 2)
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self.assertIn('RAMWeigher', class_names)
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self.assertIn('MetricsWeigher', class_names)
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class RamWeigherTestCase(test.NoDBTestCase):
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def setUp(self):
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super(RamWeigherTestCase, self).setUp()
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self.useFixture(mockpatch.Patch(
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'nova.db.compute_node_get_all',
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return_value=fakes.COMPUTE_NODES))
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self.host_manager = fakes.FakeHostManager()
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self.weight_handler = weights.HostWeightHandler()
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self.weight_classes = self.weight_handler.get_matching_classes(
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['gantt.scheduler.weights.ram.RAMWeigher'])
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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 = {}
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return self.weight_handler.get_weighed_objects(self.weight_classes,
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hosts, weight_properties)[0]
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def _get_all_hosts(self):
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ctxt = context.get_admin_context()
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return self.host_manager.get_all_host_states(ctxt)
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def test_default_of_spreading_first(self):
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hostinfo_list = self._get_all_hosts()
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# host1: free_ram_mb=512
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# host2: free_ram_mb=1024
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# host3: free_ram_mb=3072
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# host4: free_ram_mb=8192
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# so, host4 should win:
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weighed_host = self._get_weighed_host(hostinfo_list)
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self.assertEqual(weighed_host.weight, 8192)
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self.assertEqual(weighed_host.obj.host, 'host4')
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def test_ram_filter_multiplier1(self):
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self.flags(ram_weight_multiplier=-1.0)
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hostinfo_list = self._get_all_hosts()
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# host1: free_ram_mb=-512
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# host2: free_ram_mb=-1024
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# host3: free_ram_mb=-3072
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# host4: free_ram_mb=-8192
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# so, host1 should win:
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weighed_host = self._get_weighed_host(hostinfo_list)
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self.assertEqual(weighed_host.weight, -512)
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self.assertEqual(weighed_host.obj.host, 'host1')
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def test_ram_filter_multiplier2(self):
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self.flags(ram_weight_multiplier=2.0)
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hostinfo_list = self._get_all_hosts()
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# host1: free_ram_mb=512 * 2
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# host2: free_ram_mb=1024 * 2
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# host3: free_ram_mb=3072 * 2
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# host4: free_ram_mb=8192 * 2
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# so, host4 should win:
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weighed_host = self._get_weighed_host(hostinfo_list)
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self.assertEqual(weighed_host.weight, 8192 * 2)
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self.assertEqual(weighed_host.obj.host, 'host4')
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class MetricsWeigherTestCase(test.NoDBTestCase):
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def setUp(self):
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super(MetricsWeigherTestCase, self).setUp()
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self.useFixture(mockpatch.Patch(
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'nova.db.compute_node_get_all',
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return_value=fakes.COMPUTE_NODES_METRICS))
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self.host_manager = fakes.FakeHostManager()
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self.weight_handler = weights.HostWeightHandler()
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self.weight_classes = self.weight_handler.get_matching_classes(
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['gantt.scheduler.weights.metrics.MetricsWeigher'])
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def _get_weighed_host(self, hosts, setting, weight_properties=None):
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if not weight_properties:
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weight_properties = {}
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self.flags(weight_setting=setting, group='metrics')
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return self.weight_handler.get_weighed_objects(self.weight_classes,
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hosts, weight_properties)[0]
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def _get_all_hosts(self):
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ctxt = context.get_admin_context()
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return self.host_manager.get_all_host_states(ctxt)
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def _do_test(self, settings, expected_weight, expected_host):
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hostinfo_list = self._get_all_hosts()
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weighed_host = self._get_weighed_host(hostinfo_list, settings)
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self.assertEqual(weighed_host.weight, expected_weight)
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self.assertEqual(weighed_host.obj.host, expected_host)
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def test_single_resource(self):
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# host1: foo=512
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# host2: foo=1024
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# host3: foo=3072
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# host4: foo=8192
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# so, host4 should win:
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setting = ['foo=1']
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self._do_test(setting, 8192, 'host4')
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def test_multiple_resource(self):
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# host1: foo=512, bar=1
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# host2: foo=1024, bar=2
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# host3: foo=3072, bar=1
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# host4: foo=8192, bar=0
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# so, host2 should win:
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setting = ['foo=0.0001', 'bar=1']
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self._do_test(setting, 2.1024, 'host2')
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def test_single_resourcenegtive_ratio(self):
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# host1: foo=512
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# host2: foo=1024
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# host3: foo=3072
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# host4: foo=8192
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# so, host1 should win:
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setting = ['foo=-1']
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self._do_test(setting, -512, 'host1')
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def test_multiple_resource_missing_ratio(self):
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# host1: foo=512, bar=1
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# host2: foo=1024, bar=2
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# host3: foo=3072, bar=1
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# host4: foo=8192, bar=0
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# so, host4 should win:
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setting = ['foo=0.0001', 'bar']
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self._do_test(setting, 0.8192, 'host4')
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def test_multiple_resource_wrong_ratio(self):
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# host1: foo=512, bar=1
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# host2: foo=1024, bar=2
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# host3: foo=3072, bar=1
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# host4: foo=8192, bar=0
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# so, host4 should win:
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setting = ['foo=0.0001', 'bar = 2.0t']
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self._do_test(setting, 0.8192, 'host4')
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def _check_parsing_result(self, weigher, setting, results):
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self.flags(weight_setting=setting, group='metrics')
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weigher._parse_setting()
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self.assertTrue(len(results) == len(weigher.setting))
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for item in results:
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self.assertTrue(item in weigher.setting)
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def test_parse_setting(self):
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weigher = self.weight_classes[0]()
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self._check_parsing_result(weigher,
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['foo=1'],
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[('foo', 1.0)])
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self._check_parsing_result(weigher,
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['foo=1', 'bar=-2.1'],
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[('foo', 1.0), ('bar', -2.1)])
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self._check_parsing_result(weigher,
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['foo=a1', 'bar=-2.1'],
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[('bar', -2.1)])
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self._check_parsing_result(weigher,
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['foo', 'bar=-2.1'],
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[('bar', -2.1)])
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self._check_parsing_result(weigher,
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['=5', 'bar=-2.1'],
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[('bar', -2.1)])
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def test_metric_not_found(self):
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setting = ['foo=1', 'zot=2']
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self.assertRaises(exception.ComputeHostMetricNotFound,
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self._do_test,
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setting,
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8192,
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'host4')
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