72ba18468e
ServerGroupSoftAffinityWeigher implements the soft-affinity policy for server groups as it orders the hosts by the number of instances running on them from the same group in decreasing order. ServerGroupSoftAntiAffinityWeigher implements the soft-anti-affinity policy for server groups as it orders the hosts by the number of instances running on them from the same group in increasing order. Both weigher assumes the the RequestSpec object refers to a valid InstanceGroup object which has a populated members field. This will be provided by the subsequent patch. New configuration options added: * soft_affinity_weight_multiplier * soft_anti_affinity_multiplier Add docs about the new weigher classes and change the function name 'weigh_object' to '_weigh_object' in the Weights section to match the code. DocImpact Co-Authored-By: Balazs Gibizer <balazs.gibizer@ericsson.com> Implements: blueprint soft-affinity-for-server-group Change-Id: I3f156d5e5df4d9642bb4b0ffac30a6288459ce61
44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
# Copyright 2011-2014 IBM
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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.scheduler import weights
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from nova.scheduler.weights import affinity
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from nova.scheduler.weights import io_ops
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from nova.scheduler.weights import metrics
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from nova.scheduler.weights import ram
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from nova import test
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from nova.tests.unit import matchers
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from nova.tests.unit.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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self.assertIn(ram.RAMWeigher, classes)
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self.assertIn(metrics.MetricsWeigher, classes)
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self.assertIn(io_ops.IoOpsWeigher, classes)
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self.assertIn(affinity.ServerGroupSoftAffinityWeigher, classes)
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self.assertIn(affinity.ServerGroupSoftAntiAffinityWeigher, classes)
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