| /* |
| * 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. |
| */ |
| package org.apache.ambari.server.checks; |
| |
| import java.util.Arrays; |
| import java.util.Map; |
| |
| import org.apache.ambari.server.AmbariException; |
| import org.apache.ambari.server.controller.PrereqCheckRequest; |
| import org.apache.ambari.server.state.Cluster; |
| import org.apache.ambari.server.state.Service; |
| import org.apache.ambari.server.state.stack.PrereqCheckStatus; |
| import org.apache.ambari.server.state.stack.PrerequisiteCheck; |
| import org.apache.ambari.server.state.stack.UpgradePack.PrerequisiteCheckConfig; |
| import org.apache.ambari.server.utils.VersionUtils; |
| import org.apache.commons.lang.BooleanUtils; |
| |
| import com.google.inject.Singleton; |
| |
| /** |
| * The {@link YarnTimelineServerStatePreservingCheck} is used to check that the |
| * YARN Timeline server has state preserving mode enabled. This value is only |
| * present in HDP 2.2.4.2+. |
| */ |
| @Singleton |
| @UpgradeCheck(group = UpgradeCheckGroup.DEFAULT, order = 17.3f) |
| public class YarnTimelineServerStatePreservingCheck extends AbstractCheckDescriptor { |
| |
| private final static String YARN_TIMELINE_STATE_RECOVERY_ENABLED_KEY = "yarn.timeline-service.recovery.enabled"; |
| private final static String MIN_APPLICABLE_STACK_VERSION_PROPERTY_NAME = "min-applicable-stack-version"; |
| |
| /** |
| * Constructor. |
| */ |
| public YarnTimelineServerStatePreservingCheck() { |
| super(CheckDescription.SERVICES_YARN_TIMELINE_ST); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean isApplicable(PrereqCheckRequest request) throws AmbariException { |
| if (!super.isApplicable(request, Arrays.asList("YARN"), true)) { |
| return false; |
| } |
| |
| final Cluster cluster = clustersProvider.get().getCluster(request.getClusterName()); |
| |
| String minApplicableStackVersion = null; |
| PrerequisiteCheckConfig prerequisiteCheckConfig = request.getPrerequisiteCheckConfig(); |
| Map<String, String> checkProperties = null; |
| if(prerequisiteCheckConfig != null) { |
| checkProperties = prerequisiteCheckConfig.getCheckProperties(this.getClass().getName()); |
| } |
| if(checkProperties != null && checkProperties.containsKey(MIN_APPLICABLE_STACK_VERSION_PROPERTY_NAME)) { |
| minApplicableStackVersion = checkProperties.get(MIN_APPLICABLE_STACK_VERSION_PROPERTY_NAME); |
| } |
| |
| // Due to the introduction of YARN Timeline state recovery only from certain |
| // stack-versions onwards, this check is not applicable to earlier versions |
| // of the stack. |
| // Applicable only if min-applicable-stack-version config property is not defined, or |
| // version equals or exceeds the configured version. |
| if(minApplicableStackVersion != null && !minApplicableStackVersion.isEmpty()) { |
| String[] minStack = minApplicableStackVersion.split("-"); |
| if(minStack.length == 2) { |
| String minStackName = minStack[0]; |
| String minStackVersion = minStack[1]; |
| String stackName = cluster.getCurrentStackVersion().getStackName(); |
| if (minStackName.equals(stackName)) { |
| String currentClusterRepositoryVersion = cluster.getCurrentClusterVersion().getRepositoryVersion().getVersion(); |
| return VersionUtils.compareVersions(currentClusterRepositoryVersion, minStackVersion) >= 0; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException { |
| String propertyValue = getProperty(request, "yarn-site", |
| YARN_TIMELINE_STATE_RECOVERY_ENABLED_KEY); |
| |
| if (null == propertyValue || !BooleanUtils.toBoolean(propertyValue)) { |
| prerequisiteCheck.getFailedOn().add("YARN"); |
| prerequisiteCheck.setStatus(PrereqCheckStatus.FAIL); |
| prerequisiteCheck.setFailReason(getFailReason(prerequisiteCheck, request)); |
| } |
| } |
| } |