| /** |
| * 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.yarn.server.webproxy; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.SecurityUtil; |
| import org.apache.hadoop.util.ShutdownHookManager; |
| import org.apache.hadoop.util.StringUtils; |
| import org.apache.hadoop.yarn.YarnException; |
| import org.apache.hadoop.yarn.YarnUncaughtExceptionHandler; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.service.CompositeService; |
| |
| /** |
| * ProxyServer will sit in between the end user and AppMaster |
| * web interfaces. |
| */ |
| public class WebAppProxyServer extends CompositeService { |
| |
| /** |
| * Priority of the ResourceManager shutdown hook. |
| */ |
| public static final int SHUTDOWN_HOOK_PRIORITY = 30; |
| |
| private static final Log LOG = LogFactory.getLog(WebAppProxyServer.class); |
| |
| private WebAppProxy proxy = null; |
| |
| public WebAppProxyServer() { |
| super(WebAppProxyServer.class.getName()); |
| } |
| |
| @Override |
| public synchronized void init(Configuration conf) { |
| Configuration config = new YarnConfiguration(conf); |
| try { |
| doSecureLogin(conf); |
| } catch(IOException ie) { |
| throw new YarnException("Proxy Server Failed to login", ie); |
| } |
| proxy = new WebAppProxy(); |
| addService(proxy); |
| super.init(config); |
| } |
| |
| /** |
| * Log in as the Kerberose principal designated for the proxy |
| * @param conf the configuration holding this information in it. |
| * @throws IOException on any error. |
| */ |
| protected void doSecureLogin(Configuration conf) throws IOException { |
| SecurityUtil.login(conf, YarnConfiguration.PROXY_KEYTAB, |
| YarnConfiguration.PROXY_PRINCIPAL); |
| } |
| |
| /** |
| * Wait for service to finish. |
| * (Normally, it runs forever.) |
| */ |
| private void join() { |
| proxy.join(); |
| } |
| |
| public static void main(String[] args) { |
| Thread.setDefaultUncaughtExceptionHandler(new YarnUncaughtExceptionHandler()); |
| StringUtils.startupShutdownMessage(WebAppProxyServer.class, args, LOG); |
| try { |
| WebAppProxyServer proxy = new WebAppProxyServer(); |
| ShutdownHookManager.get().addShutdownHook( |
| new CompositeServiceShutdownHook(proxy), |
| SHUTDOWN_HOOK_PRIORITY); |
| YarnConfiguration conf = new YarnConfiguration(); |
| proxy.init(conf); |
| proxy.start(); |
| proxy.join(); |
| } catch (Throwable t) { |
| LOG.fatal("Error starting Proxy server", t); |
| System.exit(-1); |
| } |
| } |
| |
| } |