YARN-1938. Added kerberos login for the Timeline Server. Contributed by Zhijie Shen.

svn merge --ignore-ancestry -c 1596710 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1596711 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -70,6 +70,9 @@ Release 2.5.0 - UNRELEASED
     YARN-1981. Nodemanager version is not updated when a node reconnects (Jason
     Lowe via jeagles)
 
+    YARN-1938. Added kerberos login for the Timeline Server. (Zhijie Shen via
+    vinodkv)
+
   OPTIMIZATIONS
 
   BUG FIXES 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java

@@ -1196,6 +1196,14 @@ public class YarnConfiguration extends Configuration {
   public static final long DEFAULT_TIMELINE_SERVICE_LEVELDB_TTL_INTERVAL_MS =
       1000 * 60 * 5;
 
+  /** The Kerberos principal for the timeline server.*/
+  public static final String TIMELINE_SERVICE_PRINCIPAL =
+      TIMELINE_SERVICE_PREFIX + "principal";
+
+  /** The Kerberos keytab for the timeline server.*/
+  public static final String TIMELINE_SERVICE_KEYTAB =
+      TIMELINE_SERVICE_PREFIX + "keytab";
+
   ////////////////////////////////
   // Other Configs
   ////////////////////////////////

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml

@@ -1194,6 +1194,18 @@
     <value>10</value>
   </property>
 
+  <property>
+    <description>The Kerberos principal for the timeline server.</description>
+    <name>yarn.timeline-service.principal</name>
+    <value></value>
+  </property>
+
+  <property>
+    <description>The Kerberos keytab for the timeline server.</description>
+    <name>yarn.timeline-service.keytab</name>
+    <value>/etc/krb5.keytab</value>
+  </property>
+
   <property>
     <description>Indicate to ResourceManager as well as clients whether
     history-service is enabled or not. If enabled, ResourceManager starts

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryServer.java

@@ -18,12 +18,16 @@
 
 package org.apache.hadoop.yarn.server.applicationhistoryservice;
 
+import java.io.IOException;
+import java.net.InetSocketAddress;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 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.service.Service;
 import org.apache.hadoop.util.ExitUtil;
@@ -33,8 +37,8 @@ import org.apache.hadoop.util.StringUtils;
 import org.apache.hadoop.yarn.YarnUncaughtExceptionHandler;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
-import org.apache.hadoop.yarn.server.applicationhistoryservice.timeline.TimelineStore;
 import org.apache.hadoop.yarn.server.applicationhistoryservice.timeline.LeveldbTimelineStore;
+import org.apache.hadoop.yarn.server.applicationhistoryservice.timeline.TimelineStore;
 import org.apache.hadoop.yarn.server.applicationhistoryservice.webapp.AHSWebApp;
 import org.apache.hadoop.yarn.webapp.WebApp;
 import org.apache.hadoop.yarn.webapp.WebApps;
@@ -69,13 +73,19 @@ public class ApplicationHistoryServer extends CompositeService {
     addService((Service) historyManager);
     timelineStore = createTimelineStore(conf);
     addIfService(timelineStore);
+
+    DefaultMetricsSystem.initialize("ApplicationHistoryServer");
+    JvmMetrics.initSingleton("ApplicationHistoryServer", null);
     super.serviceInit(conf);
   }
 
   @Override
   protected void serviceStart() throws Exception {
-    DefaultMetricsSystem.initialize("ApplicationHistoryServer");
-    JvmMetrics.initSingleton("ApplicationHistoryServer", null);
+    try {
+      doSecureLogin(getConfig());
+    } catch(IOException ie) {
+      throw new YarnRuntimeException("Failed to login", ie);
+    }
 
     startWebApp();
     super.serviceStart();
@@ -177,4 +187,22 @@ public class ApplicationHistoryServer extends CompositeService {
   public TimelineStore getTimelineStore() {
     return timelineStore;
   }
+
+  private void doSecureLogin(Configuration conf) throws IOException {
+    InetSocketAddress socAddr = getBindAddress(conf);
+    SecurityUtil.login(conf, YarnConfiguration.TIMELINE_SERVICE_KEYTAB,
+        YarnConfiguration.TIMELINE_SERVICE_PRINCIPAL, socAddr.getHostName());
+  }
+
+  /**
+   * Retrieve the timeline server bind address from configuration
+   *
+   * @param conf
+   * @return InetSocketAddress
+   */
+  private static InetSocketAddress getBindAddress(Configuration conf) {
+    return conf.getSocketAddr(YarnConfiguration.TIMELINE_SERVICE_ADDRESS,
+        YarnConfiguration.DEFAULT_TIMELINE_SERVICE_ADDRESS,
+        YarnConfiguration.DEFAULT_TIMELINE_SERVICE_PORT);
+  }
 }