| /* |
| * 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 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.Config; |
| import org.apache.ambari.server.state.stack.PrereqCheckStatus; |
| import org.apache.ambari.server.state.stack.PrerequisiteCheck; |
| |
| import com.google.inject.Singleton; |
| |
| import java.util.Arrays; |
| import java.util.Map; |
| |
| /** |
| * Checks that namenode high availability is enabled. |
| */ |
| @Singleton |
| @UpgradeCheck(group = UpgradeCheckGroup.NAMENODE_HA, order = 16.2f) |
| public class ServicesNamenodeTruncateCheck extends AbstractCheckDescriptor { |
| |
| /** |
| * Constructor. |
| */ |
| public ServicesNamenodeTruncateCheck() { |
| super(CheckDescription.SERVICES_NAMENODE_TRUNCATE); |
| } |
| |
| @Override |
| public boolean isApplicable(PrereqCheckRequest request) throws AmbariException { |
| if (!super.isApplicable(request, Arrays.asList("HDFS"), true)) { |
| return false; |
| } |
| |
| PrereqCheckStatus ha = request.getResult(CheckDescription.SERVICES_NAMENODE_HA); |
| if (null != ha && ha == PrereqCheckStatus.FAIL) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public void perform(PrerequisiteCheck prerequisiteCheck, PrereqCheckRequest request) throws AmbariException { |
| final String clusterName = request.getClusterName(); |
| final Cluster cluster = clustersProvider.get().getCluster(clusterName); |
| Config config = cluster.getDesiredConfigByType("hdfs-site"); |
| |
| String truncateEnabled = config.getProperties().get("dfs.allow.truncate"); |
| |
| if (Boolean.valueOf(truncateEnabled)) { |
| prerequisiteCheck.getFailedOn().add("HDFS"); |
| PrereqCheckStatus checkStatus = PrereqCheckStatus.FAIL; |
| prerequisiteCheck.setStatus(checkStatus); |
| prerequisiteCheck.setFailReason(getFailReason(prerequisiteCheck, request)); |
| } |
| } |
| } |