| package org.apache.helix.integration.rebalancer; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.PropertyKey; |
| import org.apache.helix.TestHelper; |
| import org.apache.helix.common.ZkTestBase; |
| import org.apache.helix.integration.manager.ClusterControllerManager; |
| import org.apache.helix.integration.manager.MockParticipantManager; |
| import org.apache.helix.manager.zk.ZKHelixDataAccessor; |
| import org.apache.helix.model.ExternalView; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.MasterSlaveSMD; |
| import org.apache.helix.tools.ClusterVerifiers.BestPossibleExternalViewVerifier; |
| import org.apache.helix.tools.ClusterVerifiers.ZkHelixClusterVerifier; |
| import org.testng.Assert; |
| import org.testng.annotations.AfterClass; |
| import org.testng.annotations.BeforeClass; |
| import org.testng.annotations.Test; |
| |
| public class TestSemiAutoRebalance extends ZkTestBase { |
| protected final String CLASS_NAME = getShortClassName(); |
| protected final String CLUSTER_NAME = CLUSTER_PREFIX + "_" + CLASS_NAME; |
| |
| protected static final int PARTICIPANT_NUMBER = 5; |
| protected static final int PARTICIPANT_START_PORT = 12918; |
| |
| protected static final String DB_NAME = "TestDB"; |
| protected static final int PARTITION_NUMBER = 20; |
| protected static final int REPLICA_NUMBER = 3; |
| protected static final String STATE_MODEL = "MasterSlave"; |
| |
| protected List<MockParticipantManager> _participants = new ArrayList<>(); |
| protected ClusterControllerManager _controller; |
| |
| protected HelixDataAccessor _accessor; |
| protected PropertyKey.Builder _keyBuilder; |
| |
| @BeforeClass |
| public void beforeClass() throws InterruptedException { |
| System.out |
| .println("START " + getShortClassName() + " at " + new Date(System.currentTimeMillis())); |
| |
| // setup storage cluster |
| _gSetupTool.addCluster(CLUSTER_NAME, true); |
| _gSetupTool.addResourceToCluster(CLUSTER_NAME, DB_NAME, PARTITION_NUMBER, STATE_MODEL, |
| IdealState.RebalanceMode.SEMI_AUTO.toString()); |
| |
| _accessor = new ZKHelixDataAccessor(CLUSTER_NAME, _baseAccessor); |
| _keyBuilder = _accessor.keyBuilder(); |
| |
| List<String> instances = new ArrayList<String>(); |
| for (int i = 0; i < PARTICIPANT_NUMBER; i++) { |
| String instance = PARTICIPANT_PREFIX + "_" + (PARTICIPANT_START_PORT + i); |
| _gSetupTool.addInstanceToCluster(CLUSTER_NAME, instance); |
| instances.add(instance); |
| } |
| |
| _gSetupTool.rebalanceStorageCluster(CLUSTER_NAME, DB_NAME, REPLICA_NUMBER); |
| |
| // start dummy participants |
| for (int i = 0; i < PARTICIPANT_NUMBER; i++) { |
| MockParticipantManager participant = |
| new MockParticipantManager(ZK_ADDR, CLUSTER_NAME, instances.get(i)); |
| participant.syncStart(); |
| _participants.add(participant); |
| } |
| |
| // start controller |
| String controllerName = CONTROLLER_PREFIX + "_0"; |
| _controller = new ClusterControllerManager(ZK_ADDR, CLUSTER_NAME, controllerName); |
| _controller.syncStart(); |
| |
| ZkHelixClusterVerifier verifier = new BestPossibleExternalViewVerifier.Builder(CLUSTER_NAME) |
| .setZkClient(_gZkClient) |
| .setWaitTillVerify(TestHelper.DEFAULT_REBALANCE_PROCESSING_WAIT_TIME) |
| .build(); |
| Assert.assertTrue(verifier.verifyByPolling()); |
| } |
| |
| @AfterClass |
| public void afterClass() throws Exception { |
| _controller.syncStop(); |
| for (MockParticipantManager p : _participants) { |
| p.syncStop(); |
| } |
| deleteCluster(CLUSTER_NAME); |
| System.out.println("END " + CLASS_NAME + " at " + new Date(System.currentTimeMillis())); |
| } |
| |
| @Test |
| public void testAddParticipant() throws InterruptedException { |
| String newInstance = PARTICIPANT_PREFIX + "_" + (PARTICIPANT_START_PORT + _participants.size()); |
| _gSetupTool.addInstanceToCluster(CLUSTER_NAME, newInstance); |
| |
| MockParticipantManager newParticipant = |
| new MockParticipantManager(ZK_ADDR, CLUSTER_NAME, newInstance); |
| newParticipant.syncStart(); |
| |
| Thread.sleep(1000); |
| |
| List<String> instances = _accessor.getChildNames(_keyBuilder.instanceConfigs()); |
| Assert.assertEquals(instances.size(), _participants.size() + 1); |
| Assert.assertTrue(instances.contains(newInstance)); |
| |
| List<String> liveInstances = _accessor.getChildNames(_keyBuilder.liveInstances()); |
| Assert.assertEquals(liveInstances.size(), _participants.size() + 1); |
| Assert.assertTrue(liveInstances.contains(newInstance)); |
| |
| // nothing for new participant |
| ExternalView externalView = _accessor.getProperty(_keyBuilder.externalView(DB_NAME)); |
| Assert.assertNotNull(externalView); |
| for (String partition : externalView.getPartitionSet()) { |
| Map<String, String> stateMap = externalView.getStateMap(partition); |
| Assert.assertFalse(stateMap.containsKey(newInstance)); |
| } |
| |
| // clear |
| newParticipant.syncStop(); |
| _gSetupTool.getClusterManagementTool().enableInstance(CLUSTER_NAME, newInstance, false); |
| _gSetupTool.dropInstanceFromCluster(CLUSTER_NAME, newInstance); |
| |
| instances = _accessor.getChildNames(_keyBuilder.instanceConfigs()); |
| Assert.assertEquals(instances.size(), _participants.size()); |
| |
| liveInstances = _accessor.getChildNames(_keyBuilder.liveInstances()); |
| Assert.assertEquals(liveInstances.size(), _participants.size()); |
| } |
| |
| @Test(dependsOnMethods = "testAddParticipant") |
| public void testStopAndReStartParticipant() throws InterruptedException { |
| MockParticipantManager participant = _participants.get(0); |
| String instance = participant.getInstanceName(); |
| |
| Map<String, MasterSlaveSMD.States> affectedPartitions = |
| new HashMap<String, MasterSlaveSMD.States>(); |
| |
| ExternalView externalView = _accessor.getProperty(_keyBuilder.externalView(DB_NAME)); |
| |
| for (String partition : externalView.getPartitionSet()) { |
| Map<String, String> stateMap = externalView.getStateMap(partition); |
| if (stateMap.containsKey(instance)) { |
| affectedPartitions.put(partition, MasterSlaveSMD.States.valueOf(stateMap.get(instance))); |
| } |
| } |
| |
| stopParticipant(participant, affectedPartitions); |
| |
| // create a new participant |
| participant = new MockParticipantManager(ZK_ADDR, CLUSTER_NAME, instance); |
| _participants.set(0, participant); |
| startParticipant(participant, affectedPartitions); |
| } |
| |
| private void stopParticipant(MockParticipantManager participant, |
| Map<String, MasterSlaveSMD.States> affectedPartitions) throws InterruptedException { |
| participant.syncStop(); |
| |
| Thread.sleep(1000); |
| |
| ExternalView externalView = _accessor.getProperty(_keyBuilder.externalView(DB_NAME)); |
| // No re-assignment of partition, if a MASTER is removed, one of SLAVE would be prompted |
| for (Map.Entry<String, MasterSlaveSMD.States> entry : affectedPartitions.entrySet()) { |
| Map<String, String> stateMap = externalView.getStateMap(entry.getKey()); |
| Assert.assertEquals(stateMap.size(), REPLICA_NUMBER - 1); |
| Assert.assertTrue(stateMap.values().contains(MasterSlaveSMD.States.MASTER.toString())); |
| } |
| } |
| |
| private void startParticipant(MockParticipantManager participant, |
| Map<String, MasterSlaveSMD.States> affectedPartitions) throws InterruptedException { |
| String instance = participant.getInstanceName(); |
| participant.syncStart(); |
| |
| Thread.sleep(2000); |
| |
| ExternalView externalView = _accessor.getProperty(_keyBuilder.externalView(DB_NAME)); |
| // Everything back to the initial state |
| for (Map.Entry<String, MasterSlaveSMD.States> entry : affectedPartitions.entrySet()) { |
| Map<String, String> stateMap = externalView.getStateMap(entry.getKey()); |
| Assert.assertEquals(stateMap.size(), REPLICA_NUMBER); |
| |
| Assert.assertTrue(stateMap.containsKey(instance)); |
| Assert.assertEquals(stateMap.get(instance), entry.getValue().toString()); |
| } |
| } |
| } |