| package org.apache.helix.integration; |
| |
| /* |
| * 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 org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.HelixManager; |
| import org.apache.helix.controller.rebalancer.strategy.CrushEdRebalanceStrategy; |
| import org.apache.helix.integration.common.ZkStandAloneCMTestBase; |
| import org.apache.helix.model.IdealState; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| public class TestSwapInstance extends ZkStandAloneCMTestBase { |
| @Test |
| public void testSwapInstance() throws Exception { |
| HelixManager manager = _controller; |
| HelixDataAccessor dataAccessor = manager.getHelixDataAccessor(); |
| |
| // Create semi auto resource |
| _gSetupTool.addResourceToCluster(CLUSTER_NAME, "db-semi", 64, STATE_MODEL, |
| IdealState.RebalanceMode.SEMI_AUTO.name()); |
| _gSetupTool.rebalanceStorageCluster(CLUSTER_NAME, "db-semi", _replica); |
| |
| // Create customized resource |
| _gSetupTool.addResourceToCluster(CLUSTER_NAME, "db-customized", 64, STATE_MODEL, |
| IdealState.RebalanceMode.CUSTOMIZED.name()); |
| _gSetupTool.rebalanceStorageCluster(CLUSTER_NAME, "db-customized", _replica); |
| |
| // Create full-auto resource |
| _gSetupTool.addResourceToCluster(CLUSTER_NAME, "db-fa", 64, STATE_MODEL, |
| IdealState.RebalanceMode.FULL_AUTO.name(), CrushEdRebalanceStrategy.class.getName()); |
| _gSetupTool.rebalanceStorageCluster(CLUSTER_NAME, "db-fa", _replica); |
| |
| // Wait for cluster converge |
| Assert.assertTrue(_clusterVerifier.verifyByPolling()); |
| |
| // Get ideal states before swap |
| IdealState semiIS = dataAccessor.getProperty(dataAccessor.keyBuilder().idealStates("db-semi")); |
| IdealState customizedIS = |
| dataAccessor.getProperty(dataAccessor.keyBuilder().idealStates("db-customized")); |
| IdealState faIs = |
| dataAccessor.getProperty(dataAccessor.keyBuilder().idealStates("db-fa")); |
| |
| String oldInstanceName = String.format("%s_%s", PARTICIPANT_PREFIX, START_PORT); |
| String newInstanceName = String.format("%s_%s", PARTICIPANT_PREFIX, 66666); |
| |
| try { |
| _gSetupTool.swapInstance(CLUSTER_NAME, oldInstanceName, newInstanceName); |
| Assert.fail("Cannot swap as new instance is not added to cluster yet"); |
| } catch (Exception e) { |
| // OK - new instance not added to cluster yet |
| } |
| |
| // Add new instance to cluster |
| _gSetupTool.addInstanceToCluster(CLUSTER_NAME, newInstanceName); |
| |
| try { |
| _gSetupTool.swapInstance(CLUSTER_NAME, oldInstanceName, newInstanceName); |
| Assert.fail("Cannot swap as old instance is still alive"); |
| } catch (Exception e) { |
| // OK - old instance still alive |
| } |
| |
| // Stop old instance |
| _participants[0].syncStop(); |
| Assert.assertTrue(_clusterVerifier.verifyByPolling()); |
| |
| try { |
| _gSetupTool.swapInstance(CLUSTER_NAME, oldInstanceName, newInstanceName); |
| Assert.fail("Cannot swap as old instance is still enabled"); |
| } catch (Exception e) { |
| // OK - old instance still alive |
| } |
| |
| // disable old instance |
| _gSetupTool.getClusterManagementTool().enableInstance(CLUSTER_NAME, oldInstanceName, false); |
| Assert.assertTrue(_clusterVerifier.verifyByPolling()); |
| |
| // We can swap now |
| _gSetupTool.swapInstance(CLUSTER_NAME, oldInstanceName, newInstanceName); |
| |
| // verify cluster |
| Assert.assertTrue(_clusterVerifier.verifyByPolling()); |
| |
| verifySwapInstance(dataAccessor, "db-semi", semiIS, oldInstanceName, newInstanceName, false); |
| verifySwapInstance(dataAccessor, "db-customized", customizedIS, oldInstanceName, newInstanceName, |
| false); |
| verifySwapInstance(dataAccessor, "db-fa", faIs, oldInstanceName, newInstanceName, true); |
| |
| // Verify idempotency |
| _gSetupTool.swapInstance(CLUSTER_NAME, oldInstanceName, newInstanceName); |
| verifySwapInstance(dataAccessor, "db-semi", semiIS, oldInstanceName, newInstanceName, false); |
| verifySwapInstance(dataAccessor, "db-customized", customizedIS, oldInstanceName, newInstanceName, |
| false); |
| verifySwapInstance(dataAccessor, "db-fa", faIs, oldInstanceName, newInstanceName, true); |
| |
| } |
| |
| private void verifySwapInstance(HelixDataAccessor dataAccessor, String resourceName, |
| IdealState oldIs, String oldInstance, String newInstance, boolean isFullAuto) { |
| IdealState newIs = dataAccessor.getProperty(dataAccessor.keyBuilder().idealStates(resourceName)); |
| if (isFullAuto) { |
| // Full auto resource should not contain new instance as it's not live yet |
| for (String key : newIs.getRecord().getMapFields().keySet()) { |
| Assert.assertFalse(newIs.getRecord().getMapField(key).keySet().contains(newInstance)); |
| } |
| |
| for (String key : newIs.getRecord().getListFields().keySet()) { |
| Assert.assertFalse(newIs.getRecord().getListField(key).contains(newInstance)); |
| } |
| } else { |
| verifyIdealStateWithSwappedInstance(oldIs, newIs, oldInstance, newInstance); |
| } |
| } |
| |
| private void verifyIdealStateWithSwappedInstance(IdealState oldIs, IdealState newIs, |
| String oldInstance, String newInstance) { |
| |
| // Verify map fields |
| for (String key : oldIs.getRecord().getMapFields().keySet()) { |
| for (String host : oldIs.getRecord().getMapField(key).keySet()) { |
| if (host.equals(oldInstance)) { |
| Assert.assertTrue(oldIs.getRecord().getMapField(key).get(oldInstance) |
| .equals(newIs.getRecord().getMapField(key).get(newInstance))); |
| } else { |
| Assert.assertTrue(oldIs.getRecord().getMapField(key).get(host) |
| .equals(newIs.getRecord().getMapField(key).get(host))); |
| } |
| } |
| } |
| |
| // verify list fields |
| for (String key : oldIs.getRecord().getListFields().keySet()) { |
| Assert.assertEquals(oldIs.getRecord().getListField(key).size(), newIs.getRecord() |
| .getListField(key).size()); |
| for (int i = 0; i < oldIs.getRecord().getListField(key).size(); i++) { |
| String host = oldIs.getRecord().getListField(key).get(i); |
| String newHost = newIs.getRecord().getListField(key).get(i); |
| if (host.equals(oldInstance)) { |
| Assert.assertTrue(newHost.equals(newInstance)); |
| } else { |
| Assert.assertTrue(host.equals(newHost)); |
| } |
| } |
| } |
| } |
| |
| } |