| /** |
| * 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.server.datanode; |
| |
| import static org.apache.hadoop.fs.CommonConfigurationKeys.HADOOP_SECURITY_AUTHENTICATION; |
| |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.nio.channels.ServerSocketChannel; |
| |
| import org.apache.commons.daemon.Daemon; |
| import org.apache.commons.daemon.DaemonContext; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.server.common.HdfsConstants; |
| import org.apache.hadoop.http.HttpServer; |
| import org.mortbay.jetty.nio.SelectChannelConnector; |
| |
| /** |
| * Utility class to start a datanode in a secure cluster, first obtaining |
| * privileged resources before main startup and handing them to the datanode. |
| */ |
| public class SecureDataNodeStarter implements Daemon { |
| /** |
| * Stash necessary resources needed for datanode operation in a secure env. |
| */ |
| public static class SecureResources { |
| private final ServerSocket streamingSocket; |
| private final SelectChannelConnector listener; |
| public SecureResources(ServerSocket streamingSocket, |
| SelectChannelConnector listener) { |
| |
| this.streamingSocket = streamingSocket; |
| this.listener = listener; |
| } |
| |
| public ServerSocket getStreamingSocket() { return streamingSocket; } |
| |
| public SelectChannelConnector getListener() { return listener; } |
| } |
| |
| private String [] args; |
| private SecureResources resources; |
| |
| @Override |
| public void init(DaemonContext context) throws Exception { |
| System.err.println("Initializing secure datanode resources"); |
| // We should only start up a secure datanode in a Kerberos-secured cluster |
| Configuration conf = new Configuration(); // Skip UGI method to not log in |
| if(!conf.get(HADOOP_SECURITY_AUTHENTICATION).equals("kerberos")) |
| throw new RuntimeException("Cannot start secure datanode in unsecure cluster"); |
| |
| // Stash command-line arguments for regular datanode |
| args = context.getArguments(); |
| |
| // Obtain secure port for data streaming to datanode |
| InetSocketAddress socAddr = DataNode.getStreamingAddr(conf); |
| int socketWriteTimeout = conf.getInt("dfs.datanode.socket.write.timeout", |
| HdfsConstants.WRITE_TIMEOUT); |
| |
| ServerSocket ss = (socketWriteTimeout > 0) ? |
| ServerSocketChannel.open().socket() : new ServerSocket(); |
| ss.bind(socAddr, 0); |
| |
| // Check that we got the port we need |
| if(ss.getLocalPort() != socAddr.getPort()) |
| throw new RuntimeException("Unable to bind on specified streaming port in secure " + |
| "context. Needed " + socAddr.getPort() + ", got " + ss.getLocalPort()); |
| |
| // Obtain secure listener for web server |
| SelectChannelConnector listener = |
| (SelectChannelConnector)HttpServer.createDefaultChannelConnector(); |
| InetSocketAddress infoSocAddr = DataNode.getInfoAddr(conf); |
| listener.setHost(infoSocAddr.getHostName()); |
| listener.setPort(infoSocAddr.getPort()); |
| // Open listener here in order to bind to port as root |
| listener.open(); |
| if(listener.getPort() != infoSocAddr.getPort()) |
| throw new RuntimeException("Unable to bind on specified info port in secure " + |
| "context. Needed " + socAddr.getPort() + ", got " + ss.getLocalPort()); |
| |
| if(ss.getLocalPort() >= 1023 || listener.getPort() >= 1023) |
| throw new RuntimeException("Cannot start secure datanode on non-privileged " |
| +" ports. (streaming port = " + ss + " ) (http listener port = " + |
| listener.getConnection() + "). Exiting."); |
| |
| System.err.println("Successfully obtained privileged resources (streaming port = " |
| + ss + " ) (http listener port = " + listener.getConnection() +")"); |
| |
| resources = new SecureResources(ss, listener); |
| } |
| |
| @Override |
| public void start() throws Exception { |
| System.err.println("Starting regular datanode initialization"); |
| DataNode.secureMain(args, resources); |
| } |
| |
| @Override public void destroy() { /* Nothing to do */ } |
| @Override public void stop() throws Exception { /* Nothing to do */ } |
| } |