63 lines
2.7 KiB
Python
63 lines
2.7 KiB
Python
# Copyright (c) 2014 Cisco Systems, Inc.
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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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from nova.scheduler.solvers.constraints import ram_constraint
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from nova import test
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from nova.tests.scheduler import solver_scheduler_fakes as fakes
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class TestRamConstraint(test.NoDBTestCase):
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def setUp(self):
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super(TestRamConstraint, self).setUp()
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self.constraint_cls = ram_constraint.RamConstraint
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self._generate_fake_constraint_input()
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def _generate_fake_constraint_input(self):
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self.fake_filter_properties = {
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'instance_type': {'memory_mb': 1024},
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'instance_uuids': ['fake_uuid_%s' % x for x in range(2)],
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'num_instances': 2}
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host1 = fakes.FakeSolverSchedulerHostState('host1', 'node1',
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{'free_ram_mb': 512, 'total_usable_ram_mb': 1024})
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host2 = fakes.FakeSolverSchedulerHostState('host2', 'node1',
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{'free_ram_mb': 2048, 'total_usable_ram_mb': 2048})
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host3 = fakes.FakeSolverSchedulerHostState('host3', 'node1',
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{'free_ram_mb': -256, 'total_usable_ram_mb': 512})
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self.fake_hosts = [host1, host2, host3]
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def test_get_constraint_matrix(self):
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self.flags(ram_allocation_ratio=1.0)
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expected_cons_mat = [
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[False, False],
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[True, True],
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[False, False]]
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cons_mat = self.constraint_cls().get_constraint_matrix(
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self.fake_hosts, self.fake_filter_properties)
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self.assertEqual(expected_cons_mat, cons_mat)
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def test_get_constraint_matrix_oversubscribe(self):
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self.flags(ram_allocation_ratio=2.0)
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expected_cons_mat = [
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[True, False],
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[True, True],
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[False, False]]
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cons_mat = self.constraint_cls().get_constraint_matrix(
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self.fake_hosts, self.fake_filter_properties)
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self.assertEqual(expected_cons_mat, cons_mat)
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self.assertEqual(1024 * 2.0, self.fake_hosts[0].limits['memory_mb'])
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self.assertEqual(2048 * 2.0, self.fake_hosts[1].limits['memory_mb'])
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self.assertEqual(512 * 2.0, self.fake_hosts[2].limits['memory_mb'])
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