172 lines
6.3 KiB
Python
172 lines
6.3 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 RAM weights.
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"""
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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 ram
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from nova import test
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from nova.tests.unit.scheduler import fakes
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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.weight_handler = weights.HostWeightHandler()
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self.weighers = [ram.RAMWeigher()]
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self.ram_weigher = 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.weighers,
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hosts, weight_properties)[0]
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def _get_all_hosts(self):
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host_values = [
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('host1', 'node1', {'free_ram_mb': 512}),
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('host2', 'node2', {'free_ram_mb': 1024}),
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('host3', 'node3', {'free_ram_mb': 3072}),
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('host4', 'node4', {'free_ram_mb': 8192})
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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 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(1.0, weighed_host.weight)
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self.assertEqual('host4', weighed_host.obj.host)
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def test_ram_filter_multiplier1(self):
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self.flags(ram_weight_multiplier=0.0, group='filter_scheduler')
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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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# We do not know the host, all have same weight.
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weighed_host = self._get_weighed_host(hostinfo_list)
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self.assertEqual(0.0, weighed_host.weight)
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def test_ram_filter_multiplier2(self):
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self.flags(ram_weight_multiplier=2.0, group='filter_scheduler')
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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(1.0 * 2, weighed_host.weight)
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self.assertEqual('host4', weighed_host.obj.host)
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def test_ram_filter_negative(self):
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self.flags(ram_weight_multiplier=1.0, group='filter_scheduler')
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hostinfo_list = self._get_all_hosts()
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host_attr = {'id': 100, 'memory_mb': 8192, 'free_ram_mb': -512}
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host_state = fakes.FakeHostState('negative', 'negative', host_attr)
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hostinfo_list = list(hostinfo_list) + [host_state]
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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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# negativehost: free_ram_mb=-512
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# so, host4 should win
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weights = self.weight_handler.get_weighed_objects(self.weighers,
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hostinfo_list, {})
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weighed_host = weights[0]
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self.assertEqual(1, weighed_host.weight)
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self.assertEqual('host4', weighed_host.obj.host)
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# and negativehost should lose
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weighed_host = weights[-1]
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self.assertEqual(0, weighed_host.weight)
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self.assertEqual('negative', weighed_host.obj.host)
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def test_ram_weigher_multiplier(self):
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self.flags(ram_weight_multiplier=-1.0, group='filter_scheduler')
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host_attr = {'free_ram_mb': 5120}
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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(-1, self.ram_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={'ram_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.ram_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={'ram_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={'ram_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.ram_weigher.weight_multiplier(host1))
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def test_host_with_agg(self):
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self.flags(ram_weight_multiplier=-1.0, 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={'ram_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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# 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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weights = self.weight_handler.get_weighed_objects(self.weighers,
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hostinfo_list, {})
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weighed_host = weights[0]
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self.assertEqual(1.0 * 1.5, weighed_host.weight)
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self.assertEqual('host4', weighed_host.obj.host)
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