259 lines
10 KiB
Python
259 lines
10 KiB
Python
# Copyright (c) 2015 Ericsson AB
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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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import mock
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from nova import objects
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from nova.scheduler import weights
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from nova.scheduler.weights import affinity
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from nova import test
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from nova.tests.unit.scheduler import fakes
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class SoftWeigherTestBase(test.NoDBTestCase):
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def setUp(self):
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super(SoftWeigherTestBase, self).setUp()
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self.weight_handler = weights.HostWeightHandler()
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self.weighers = []
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def _get_weighed_host(self, hosts, policy, group='default'):
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if group == 'default':
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members = ['member1', 'member2', 'member3', 'member4', 'member5',
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'member6', 'member7']
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else:
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members = ['othermember1', 'othermember2']
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request_spec = objects.RequestSpec(
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instance_group=objects.InstanceGroup(
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policy=policy,
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members=members))
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return self.weight_handler.get_weighed_objects(self.weighers,
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hosts,
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request_spec)[0]
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def _get_all_hosts(self):
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host_values = [
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('host1', 'node1', {'instances': {
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'member1': mock.sentinel,
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'instance13': mock.sentinel
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}}),
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('host2', 'node2', {'instances': {
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'member2': mock.sentinel,
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'member3': mock.sentinel,
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'member4': mock.sentinel,
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'member5': mock.sentinel,
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'othermember1': mock.sentinel,
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'othermember2': mock.sentinel,
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'instance14': mock.sentinel
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}}),
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('host3', 'node3', {'instances': {
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'instance15': mock.sentinel
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}}),
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('host4', 'node4', {'instances': {
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'member6': mock.sentinel,
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'member7': mock.sentinel,
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'instance16': mock.sentinel
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}})]
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return [fakes.FakeHostState(host, node, values)
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for host, node, values in host_values]
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def _do_test(self, policy, expected_weight, expected_host,
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group='default'):
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hostinfo_list = self._get_all_hosts()
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weighed_host = self._get_weighed_host(hostinfo_list,
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policy, group)
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self.assertEqual(expected_weight, weighed_host.weight)
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if expected_host:
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self.assertEqual(expected_host, weighed_host.obj.host)
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class SoftAffinityWeigherTestCase(SoftWeigherTestBase):
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def setUp(self):
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super(SoftAffinityWeigherTestCase, self).setUp()
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self.weighers = [affinity.ServerGroupSoftAffinityWeigher()]
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self.softaffin_weigher = affinity.ServerGroupSoftAffinityWeigher()
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def test_soft_affinity_weight_multiplier_by_default(self):
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self._do_test(policy='soft-affinity',
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expected_weight=1.0,
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expected_host='host2')
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def test_soft_affinity_weight_multiplier_zero_value(self):
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# We do not know the host, all have same weight.
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self.flags(soft_affinity_weight_multiplier=0.0,
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group='filter_scheduler')
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self._do_test(policy='soft-affinity',
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expected_weight=0.0,
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expected_host=None)
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def test_soft_affinity_weight_multiplier_positive_value(self):
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self.flags(soft_affinity_weight_multiplier=2.0,
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group='filter_scheduler')
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self._do_test(policy='soft-affinity',
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expected_weight=2.0,
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expected_host='host2')
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def test_soft_affinity_weight_multiplier(self):
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self.flags(soft_affinity_weight_multiplier=0.0,
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group='filter_scheduler')
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host_attr = {'instances': {'instance1': mock.sentinel}}
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host1 = fakes.FakeHostState('fake-host', 'node', host_attr)
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# By default, return the weight_multiplier configuration directly
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self.assertEqual(0.0, self.softaffin_weigher.weight_multiplier(host1))
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host1.aggregates = [
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objects.Aggregate(
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id=1,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_affinity_weight_multiplier': '2'},
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)]
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# read the weight multiplier from metadata to override the config
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self.assertEqual(2.0, self.softaffin_weigher.weight_multiplier(host1))
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host1.aggregates = [
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objects.Aggregate(
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id=1,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_affinity_weight_multiplier': '2'},
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),
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objects.Aggregate(
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id=2,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_affinity_weight_multiplier': '1.5'},
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)]
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# If the host is in multiple aggs and there are conflict weight values
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# in the metadata, we will use the min value among them
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self.assertEqual(1.5, self.softaffin_weigher.weight_multiplier(host1))
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def test_host_with_agg(self):
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self.flags(soft_affinity_weight_multiplier=0.0,
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group='filter_scheduler')
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hostinfo_list = self._get_all_hosts()
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aggs = [
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objects.Aggregate(
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id=1,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_affinity_weight_multiplier': '1.5'},
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)]
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for h in hostinfo_list:
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h.aggregates = aggs
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weighed_host = self._get_weighed_host(hostinfo_list,
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'soft-affinity')
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self.assertEqual(1.5, weighed_host.weight)
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self.assertEqual('host2', weighed_host.obj.host)
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def test_running_twice(self):
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"""Run the weighing twice for different groups each run
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The first run has a group with more members on the same host than the
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second both. In both cases, most members of their groups are on the
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same host => weight should be maximum (1 with default multiplier).
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"""
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self._do_test(policy='soft-affinity',
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expected_weight=1.0,
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expected_host='host2')
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self._do_test(policy='soft-affinity',
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expected_weight=1.0,
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expected_host='host2',
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group='other')
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class SoftAntiAffinityWeigherTestCase(SoftWeigherTestBase):
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def setUp(self):
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super(SoftAntiAffinityWeigherTestCase, self).setUp()
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self.weighers = [affinity.ServerGroupSoftAntiAffinityWeigher()]
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self.antiaffin_weigher = affinity.ServerGroupSoftAntiAffinityWeigher()
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def test_soft_anti_affinity_weight_multiplier_by_default(self):
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self._do_test(policy='soft-anti-affinity',
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expected_weight=1.0,
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expected_host='host3')
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def test_soft_anti_affinity_weight_multiplier_zero_value(self):
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# We do not know the host, all have same weight.
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self.flags(soft_anti_affinity_weight_multiplier=0.0,
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group='filter_scheduler')
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self._do_test(policy='soft-anti-affinity',
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expected_weight=0.0,
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expected_host=None)
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def test_soft_anti_affinity_weight_multiplier_positive_value(self):
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self.flags(soft_anti_affinity_weight_multiplier=2.0,
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group='filter_scheduler')
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self._do_test(policy='soft-anti-affinity',
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expected_weight=2.0,
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expected_host='host3')
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def test_soft_anti_affinity_weight_multiplier(self):
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self.flags(soft_anti_affinity_weight_multiplier=0.0,
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group='filter_scheduler')
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host_attr = {'instances': {'instance1': mock.sentinel}}
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host1 = fakes.FakeHostState('fake-host', 'node', host_attr)
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# By default, return the weight_multiplier configuration directly
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self.assertEqual(0.0, self.antiaffin_weigher.weight_multiplier(host1))
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host1.aggregates = [
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objects.Aggregate(
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id=1,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_anti_affinity_weight_multiplier': '2'},
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)]
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# read the weight multiplier from metadata to override the config
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self.assertEqual(2.0, self.antiaffin_weigher.weight_multiplier(host1))
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host1.aggregates = [
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objects.Aggregate(
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id=1,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_anti_affinity_weight_multiplier': '2'},
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),
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objects.Aggregate(
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id=2,
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name='foo',
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hosts=['fake-host'],
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metadata={'soft_anti_affinity_weight_multiplier': '1.5'},
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)]
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# If the host is in multiple aggs and there are conflict weight values
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# in the metadata, we will use the min value among them
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self.assertEqual(1.5, self.antiaffin_weigher.weight_multiplier(host1))
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def test_host_with_agg(self):
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self.flags(soft_anti_affinity_weight_multiplier=0.0,
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group='filter_scheduler')
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hostinfo_list = self._get_all_hosts()
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aggs = [
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objects.Aggregate(
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id=1,
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name='foo',
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hosts=['host1', 'host2', 'host3', 'host4'],
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metadata={'soft_anti_affinity_weight_multiplier': '1.5'},
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)]
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for h in hostinfo_list:
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h.aggregates = aggs
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weighed_host = self._get_weighed_host(hostinfo_list,
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'soft-anti-affinity')
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self.assertEqual(1.5, weighed_host.weight)
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self.assertEqual('host3', weighed_host.obj.host)
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