Peter Stachowski
51f2655770
In order to allow clusters to be all on the same hypervisor (affinity) or all on different hypervisors (anti-affinity) a new argument (locality) needed to be added to the Trove cluster-create API. This changeset addresses the Trove server part of this feature. 'locality' can now be added to the ReST payload for a cluster-create command and it is passed along as a scheduler hint to Nova. The cluster scenario tests were enhanced to test that 'affinity' works. Testing that 'anti-affinity' fails proved to be too time consuming, since at present the only way for a cluster to 'fail' is to timeout (and that takes 10 hours). The server-group is checked to make sure it is created properly, and that it has been deleted after all the related instances are gone. DocImpact: New functionality Partially implements: blueprint replication-cluster-locality Depends-On: Ie46cfa69ffe6a64760aca38c495563f5724bd0d0 Change-Id: I657bf5c023d0257e462cc39f57c16eb6ee83807a
100 lines
3.9 KiB
Python
100 lines
3.9 KiB
Python
# Copyright 2016 Tesora 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 mock import ANY
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from mock import MagicMock
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from mock import Mock
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from mock import patch
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from trove.cluster import models
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from trove.common.strategies.cluster.experimental.cassandra.api \
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import CassandraCluster
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from trove.common.strategies.cluster.experimental.cassandra.taskmanager \
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import CassandraClusterTasks
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from trove.instance import models as inst_models
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from trove.quota import quota
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from trove.tests.unittests import trove_testtools
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class ClusterTest(trove_testtools.TestCase):
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def setUp(self):
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super(ClusterTest, self).setUp()
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self.context = trove_testtools.TroveTestContext(self)
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def tearDown(self):
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super(ClusterTest, self).tearDown()
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@patch.object(inst_models.Instance, 'create')
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@patch.object(quota.QUOTAS, 'check_quotas')
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@patch.object(models, 'get_flavors_from_instance_defs')
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@patch.object(models, 'get_required_volume_size', return_value=3)
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def test_create_cluster_instances(self, get_vol_size, _, check_quotas,
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inst_create):
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test_instances = [MagicMock(), MagicMock()]
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num_instances = len(test_instances)
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datastore = Mock(manager='cassandra')
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datastore_version = Mock(manager='cassandra')
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with patch.object(CassandraClusterTasks, 'find_cluster_node_ids',
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return_value=[inst.id for inst in test_instances]):
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CassandraCluster._create_cluster_instances(
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self.context, 'test_cluster_id', 'test_cluster',
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datastore, datastore_version,
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test_instances, None, None)
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check_quotas.assert_called_once_with(
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ANY, instances=num_instances, volumes=get_vol_size.return_value)
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self.assertEqual(num_instances, inst_create.call_count,
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"Unexpected number of instances created.")
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def test_choose_seed_nodes(self):
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nodes = self._build_mock_nodes(3)
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seeds = CassandraClusterTasks.choose_seed_nodes(nodes)
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self.assertEqual(1, len(seeds),
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"Only one seed node should be selected for a "
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"single-rack-single-dc cluster.")
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nodes = self._build_mock_nodes(3)
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nodes[0]['rack'] = 'rack1'
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nodes[1]['rack'] = 'rack2'
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seeds = CassandraClusterTasks.choose_seed_nodes(nodes)
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self.assertEqual(2, len(seeds),
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"There should be exactly two seed nodes. "
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"One from each rack.")
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nodes = self._build_mock_nodes(3)
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nodes[0]['rack'] = 'rack1'
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nodes[1]['rack'] = 'rack2'
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nodes[2]['dc'] = 'dc2'
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seeds = CassandraClusterTasks.choose_seed_nodes(nodes)
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self.assertEqual(3, len(seeds),
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"There should be exactly three seed nodes. "
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"One from each rack and data center.")
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def _build_mock_nodes(self, num_nodes):
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nodes = []
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for _ in range(num_nodes):
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mock_instance = MagicMock()
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nodes.append({'instance': mock_instance,
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'guest': MagicMock(),
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'id': mock_instance.id,
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'ip': '%s_IP' % mock_instance.id,
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'dc': 'dc1',
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'rack': 'rack1'
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})
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return nodes
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