| /** |
| * 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.hadoop.hdfs.tools; |
| |
| import java.io.PrintStream; |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| import org.apache.hadoop.ha.HAAdmin; |
| import org.apache.hadoop.ha.HAServiceTarget; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSUtil; |
| import org.apache.hadoop.hdfs.DFSUtilClient; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| /** |
| * Class to extend HAAdmin to do a little bit of HDFS-specific configuration. |
| */ |
| public class DFSHAAdmin extends HAAdmin { |
| |
| private static final Log LOG = LogFactory.getLog(DFSHAAdmin.class); |
| |
| private String nameserviceId; |
| |
| protected void setErrOut(PrintStream errOut) { |
| this.errOut = errOut; |
| } |
| |
| protected void setOut(PrintStream out) { |
| this.out = out; |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| if (conf != null) { |
| conf = addSecurityConfiguration(conf); |
| } |
| super.setConf(conf); |
| } |
| |
| /** |
| * Add the requisite security principal settings to the given Configuration, |
| * returning a copy. |
| * @param conf the original config |
| * @return a copy with the security settings added |
| */ |
| public static Configuration addSecurityConfiguration(Configuration conf) { |
| // Make a copy so we don't mutate it. Also use an HdfsConfiguration to |
| // force loading of hdfs-site.xml. |
| conf = new HdfsConfiguration(conf); |
| String nameNodePrincipal = conf.get( |
| DFSConfigKeys.DFS_NAMENODE_KERBEROS_PRINCIPAL_KEY, ""); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Using NN principal: " + nameNodePrincipal); |
| } |
| |
| conf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, |
| nameNodePrincipal); |
| return conf; |
| } |
| |
| /** |
| * Try to map the given namenode ID to its service address. |
| */ |
| @Override |
| protected HAServiceTarget resolveTarget(String nnId) { |
| HdfsConfiguration conf = (HdfsConfiguration)getConf(); |
| return new NNHAServiceTarget(conf, nameserviceId, nnId); |
| } |
| |
| @Override |
| protected String getUsageString() { |
| return "Usage: haadmin [-ns <nameserviceId>]"; |
| } |
| |
| @Override |
| protected int runCmd(String[] argv) throws Exception { |
| if (argv.length < 1) { |
| printUsage(errOut); |
| return -1; |
| } |
| |
| int i = 0; |
| String cmd = argv[i++]; |
| |
| if ("-ns".equals(cmd)) { |
| if (i == argv.length) { |
| errOut.println("Missing nameservice ID"); |
| printUsage(errOut); |
| return -1; |
| } |
| nameserviceId = argv[i++]; |
| if (i >= argv.length) { |
| errOut.println("Missing command"); |
| printUsage(errOut); |
| return -1; |
| } |
| argv = Arrays.copyOfRange(argv, i, argv.length); |
| } |
| |
| return super.runCmd(argv); |
| } |
| |
| /** |
| * returns the list of all namenode ids for the given configuration |
| */ |
| @Override |
| protected Collection<String> getTargetIds(String namenodeToActivate) { |
| return DFSUtilClient.getNameNodeIds(getConf(), |
| (nameserviceId != null) ? nameserviceId : DFSUtil.getNamenodeNameServiceId( |
| getConf())); |
| } |
| |
| public static void main(String[] argv) throws Exception { |
| int res = ToolRunner.run(new DFSHAAdmin(), argv); |
| System.exit(res); |
| } |
| } |