org.apache.hadoop.yarn.server.webproxy.WebAppProxyServer Maven / Gradle / Ivy
/**
* 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 java.net.InetSocketAddress;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
import org.apache.hadoop.metrics2.source.JvmMetrics;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.service.CompositeService;
import org.apache.hadoop.util.ExitUtil;
import org.apache.hadoop.util.GenericOptionsParser;
import org.apache.hadoop.util.JvmPauseMonitor;
import org.apache.hadoop.util.ShutdownHookManager;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.YarnUncaughtExceptionHandler;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 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 Logger LOG = LoggerFactory.getLogger(
WebAppProxyServer.class);
private WebAppProxy proxy = null;
private JvmPauseMonitor pauseMonitor;
public WebAppProxyServer() {
super(WebAppProxyServer.class.getName());
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
Configuration config = new YarnConfiguration(conf);
doSecureLogin(conf);
proxy = new WebAppProxy();
addService(proxy);
DefaultMetricsSystem.initialize("WebAppProxyServer");
JvmMetrics jm = JvmMetrics.initSingleton("WebAppProxyServer", null);
pauseMonitor = new JvmPauseMonitor();
addService(pauseMonitor);
jm.setPauseMonitor(pauseMonitor);
super.serviceInit(config);
}
@Override
protected void serviceStart() throws Exception {
super.serviceStart();
}
@Override
protected void serviceStop() throws Exception {
super.serviceStop();
DefaultMetricsSystem.shutdown();
}
/**
* 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 {
InetSocketAddress socAddr = getBindAddress(conf);
SecurityUtil.login(conf, YarnConfiguration.PROXY_KEYTAB,
YarnConfiguration.PROXY_PRINCIPAL, socAddr.getHostName());
}
/**
* Retrieve PROXY bind address from configuration
*
* @param conf
* @return InetSocketAddress
*/
public static InetSocketAddress getBindAddress(Configuration conf) {
return conf.getSocketAddr(
YarnConfiguration.PROXY_BIND_HOST,
YarnConfiguration.PROXY_ADDRESS,
YarnConfiguration.DEFAULT_PROXY_ADDRESS,
YarnConfiguration.DEFAULT_PROXY_PORT);
}
public static void main(String[] args) {
Thread.setDefaultUncaughtExceptionHandler(new YarnUncaughtExceptionHandler());
StringUtils.startupShutdownMessage(WebAppProxyServer.class, args, LOG);
try {
YarnConfiguration configuration = new YarnConfiguration();
new GenericOptionsParser(configuration, args);
WebAppProxyServer proxyServer = startServer(configuration);
proxyServer.proxy.join();
} catch (Throwable t) {
ExitUtil.terminate(-1, t);
}
}
/**
* Start proxy server.
*
* @return proxy server instance.
*/
protected static WebAppProxyServer startServer(Configuration configuration)
throws Exception {
WebAppProxyServer proxy = new WebAppProxyServer();
ShutdownHookManager.get().addShutdownHook(
new CompositeServiceShutdownHook(proxy), SHUTDOWN_HOOK_PRIORITY);
proxy.init(configuration);
proxy.start();
return proxy;
}
}