HDFS-6278. Create HTML5-based UI for SNN. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1589613 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -307,6 +307,8 @@ Release 2.5.0 - UNRELEASED
 
     HDFS-6265. Prepare HDFS codebase for JUnit 4.11. (cnauroth)
 
+    HDFS-6278. Create HTML5-based UI for SNN. (wheat9)
+
   OPTIMIZATIONS
 
     HDFS-6214. Webhdfs has poor throughput for files >2GB (daryn)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SecondaryNameNode.java

@@ -27,11 +27,9 @@ import java.net.URI;
 import java.net.URL;
 import java.security.PrivilegedAction;
 import java.security.PrivilegedExceptionAction;
-import java.util.Collection;
-import java.util.Date;
-import java.util.Iterator;
-import java.util.List;
+import java.util.*;
 
+import com.google.common.collect.Lists;
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.CommandLineParser;
 import org.apache.commons.cli.HelpFormatter;
@@ -70,6 +68,7 @@ import org.apache.hadoop.io.MD5Hash;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
 import org.apache.hadoop.metrics2.source.JvmMetrics;
+import org.apache.hadoop.metrics2.util.MBeans;
 import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.security.SecurityUtil;
 import org.apache.hadoop.security.UserGroupInformation;
@@ -80,6 +79,9 @@ import org.apache.hadoop.util.Time;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
+import org.apache.hadoop.util.VersionInfo;
+
+import javax.management.ObjectName;
 
 /**********************************************************
  * The Secondary NameNode is a helper to the primary NameNode.
@@ -95,7 +97,8 @@ import com.google.common.collect.ImmutableList;
  *
  **********************************************************/
 @InterfaceAudience.Private
-public class SecondaryNameNode implements Runnable {
+public class SecondaryNameNode implements Runnable,
+        SecondaryNameNodeInfoMXBean {
     
   static{
     HdfsConfiguration.init();
@@ -122,7 +125,7 @@ public class SecondaryNameNode implements Runnable {
   private FSNamesystem namesystem;
 
   private Thread checkpointThread;
-
+  private ObjectName nameNodeStatusBeanName;
 
   @Override
   public String toString() {
@@ -169,11 +172,6 @@ public class SecondaryNameNode implements Runnable {
     this.namenode = namenode;
   }
 
-  @VisibleForTesting
-  List<URI> getCheckpointDirs() {
-    return ImmutableList.copyOf(checkpointDirs);
-  }
-  
   /**
    * Create a connection to the primary namenode.
    */
@@ -265,6 +263,9 @@ public class SecondaryNameNode implements Runnable {
         DFSConfigKeys.DFS_SECONDARY_NAMENODE_KERBEROS_INTERNAL_SPNEGO_PRINCIPAL_KEY,
         DFSConfigKeys.DFS_SECONDARY_NAMENODE_KEYTAB_FILE_KEY);
 
+    nameNodeStatusBeanName = MBeans.register("SecondaryNameNode",
+            "SecondaryNameNodeInfo", this);
+
     infoServer = builder.build();
 
     infoServer.setAttribute("secondary.name.node", this);
@@ -330,6 +331,10 @@ public class SecondaryNameNode implements Runnable {
     } catch (Exception e) {
       LOG.warn("Exception shutting down SecondaryNameNode", e);
     }
+    if (nameNodeStatusBeanName != null) {
+      MBeans.unregister(nameNodeStatusBeanName);
+      nameNodeStatusBeanName = null;
+    }
     try {
       if (checkpointImage != null) {
         checkpointImage.close();
@@ -679,6 +684,50 @@ public class SecondaryNameNode implements Runnable {
     checkpointThread.start();
   }
 
+  @Override // SecondaryNameNodeInfoMXXBean
+  public String getHostAndPort() {
+    return NetUtils.getHostPortString(nameNodeAddr);
+  }
+
+  @Override // SecondaryNameNodeInfoMXXBean
+  public long getStartTime() {
+    return starttime;
+  }
+
+  @Override // SecondaryNameNodeInfoMXXBean
+  public long getLastCheckpointTime() {
+    return lastCheckpointTime;
+  }
+
+  @Override // SecondaryNameNodeInfoMXXBean
+  public String[] getCheckpointDirectories() {
+    ArrayList<String> r = Lists.newArrayListWithCapacity(checkpointDirs.size());
+    for (URI d : checkpointDirs) {
+      r.add(d.toString());
+    }
+    return r.toArray(new String[r.size()]);
+  }
+
+  @Override // SecondaryNameNodeInfoMXXBean
+  public String[] getCheckpointEditlogDirectories() {
+    ArrayList<String> r = Lists.newArrayListWithCapacity(checkpointEditsDirs.size());
+    for (URI d : checkpointEditsDirs) {
+      r.add(d.toString());
+    }
+    return r.toArray(new String[r.size()]);
+  }
+
+  @Override // VersionInfoMXBean
+  public String getCompileInfo() {
+    return VersionInfo.getDate() + " by " + VersionInfo.getUser() +
+            " from " + VersionInfo.getBranch();
+  }
+
+  @Override // VersionInfoMXBean
+  public String getSoftwareVersion() {
+    return VersionInfo.getVersion();
+  }
+
 
   /**
    * Container for parsed command-line options.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SecondaryNameNodeInfoMXBean.java

@@ -0,0 +1,52 @@
+/**
+ * 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.namenode;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+
+/**
+ * JMX information of the secondary NameNode
+ */
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+public interface SecondaryNameNodeInfoMXBean extends VersionInfoMXBean {
+  /**
+   * Gets the host and port colon separated.
+   */
+  public String getHostAndPort();
+
+  /**
+   * @return the timestamp of when the SNN starts
+   */
+  public long getStartTime();
+
+  /**
+   * @return the timestamp of the last checkpoint
+   */
+  public long getLastCheckpointTime();
+
+  /**
+   * @return the directories that store the checkpoint images
+   */
+  public String[] getCheckpointDirectories();
+  /**
+   * @return the directories that store the edit logs
+   */
+  public String[] getCheckpointEditlogDirectories();
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/VersionInfoMXBean.java

@@ -0,0 +1,35 @@
+/**
+ * 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.namenode;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+public interface VersionInfoMXBean {
+  /**
+   * @return the compilation information which contains date, user and branch
+   */
+  public String getCompileInfo();
+
+  /**
+   * @return the software version
+   */
+  public String getSoftwareVersion();
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.html

@@ -351,7 +351,7 @@
 </script><script type="text/javascript" src="/static/bootstrap-3.0.2/js/bootstrap.min.js">
 </script><script type="text/javascript" src="/static/dust-full-2.0.0.min.js">
 </script><script type="text/javascript" src="/static/dust-helpers-1.1.1.min.js">
-</script><script type="text/javascript" src="dfs-dust.js">
+</script><script type="text/javascript" src="/static/dfs-dust.js">
 </script><script type="text/javascript" src="dfshealth.js">
 </script>
 </body>

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/explorer.html

@@ -122,7 +122,7 @@
     </script><script type="text/javascript" src="/static/bootstrap-3.0.2/js/bootstrap.min.js">
     </script><script type="text/javascript" src="/static/dust-full-2.0.0.min.js">
     </script><script type="text/javascript" src="/static/dust-helpers-1.1.1.min.js">
-    </script><script type="text/javascript" src="dfs-dust.js">
+    </script><script type="text/javascript" src="/static/dfs-dust.js">
     </script><script type="text/javascript" src="explorer.js">
     </script>
     <hr />

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/secondary/index.html

@@ -1,5 +1,3 @@
-<meta HTTP-EQUIV="REFRESH" content="0;url=status.jsp"/>
-<html>
 <!--
    Licensed to the Apache Software Foundation (ASF) under one or more
    contributor license agreements.  See the NOTICE file distributed with
@@ -16,14 +14,22 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 -->
-<head><title>Hadoop Administration</title></head>
-
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <meta http-equiv="REFRESH" content="0;url=status.html" />
+  <title>Hadoop Administration</title>
+</head>
 <body>
+<script type="text/javascript">
+//<![CDATA[
+window.location.href='status.html';
+//]]>
+</script>
 <h1>Hadoop Administration</h1>
-
-<ul> 
-  <li><a href="status.jsp">Status</a></li> 
+<ul>
+  <li><a href="status.jsp">Status</a></li>
 </ul>
-
-</body> 
-</html>
+</body>
+</html>

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/secondary/snn.js

@@ -0,0 +1,68 @@
+/**
+ * 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.
+ */
+(function () {
+  "use strict";
+
+  var data = {};
+  var outstanding_requests = 2;
+
+  dust.loadSource(dust.compile($('#tmpl-snn').html(), 'snn'));
+
+  function show_error_msg(msg) {
+    $('#alert-panel-body').html(msg);
+    $('#alert-panel').show();
+  }
+
+  function finished_request() {
+    outstanding_requests--;
+    if (outstanding_requests == 0) {
+      if (data.snn !== undefined && data.conf !== undefined) {
+        var conf = data.conf;
+        data.snn.CheckpointPeriod = conf['dfs.namenode.checkpoint.period'];
+        data.snn.TxnCount = conf['dfs.namenode.checkpoint.txns'];
+        render();
+      } else {
+        show_error_msg('Failed to load the information.');
+      }
+    }
+  }
+
+  function load() {
+    $.getJSON('/jmx?qry=Hadoop:service=SecondaryNameNode,name=SecondaryNameNodeInfo', function(resp) {
+      data.snn = resp.beans[0];
+    }).always(finished_request);
+
+    $.ajax({'url': '/conf', 'dataType': 'xml'}).done(function(d) {
+      var $xml = $(d);
+      var confs = {};
+      $xml.find('property').each(function(idx,v) {
+        confs[$(v).find('name').text()] = $(v).find('value').text();
+      });
+      data.conf = confs;
+    }).always(finished_request);
+  }
+
+  function render() {
+    dust.render('snn', data, function(err, out) {
+      $('#tab-overview').html(out);
+      $('#tab-overview').addClass('active');
+    });
+  }
+
+  load();
+})();

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/secondary/status.html

@@ -0,0 +1,96 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<!--
+   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.
+-->
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <link rel="stylesheet" type="text/css"
+       href="/static/bootstrap-3.0.2/css/bootstrap.min.css" />
+  <link rel="stylesheet" type="text/css" href="/static/hadoop.css" />
+  <title>SecondaryNamenode information</title>
+</head>
+<body>
+
+<header class="navbar navbar-inverse bs-docs-nav" role="banner">
+<div class="container">
+  <div class="navbar-header">
+    <div class="navbar-brand">Hadoop</div>
+  </div>
+
+  <ul class="nav navbar-nav" id="ui-tabs">
+    <li><a>Overview</a></li>
+  </ul>
+</div>
+</header>
+
+<div class="container">
+
+<div id="alert-panel">
+  <div class="alert alert-danger">
+    <button type="button" class="close" onclick="$('#alert-panel').hide();">&times;</button>
+    <div class="alert-body" id="alert-panel-body"></div>
+  </div>
+</div>
+
+<div class="tab-content">
+  <div class="tab-pane" id="tab-overview"></div>
+</div>
+
+<div class="row">
+  <hr />
+  <div class="col-xs-2"><p>Hadoop, 2014.</p></div>
+</div>
+</div>
+
+<script type="text/x-dust-template" id="tmpl-snn">
+{#snn}
+<div class="page-header"><h1>Overview</h1></div>
+<table class="table table-bordered table-striped">
+  <tr><th>Version</th><td>{SoftwareVersion}</td></tr>
+  <tr><th>Compiled</th><td>{CompileInfo}</td></tr>
+  <tr><th>NameNode Address</th><td>{HostAndPort}</td></tr>
+  <tr><th>Started</th><td>{StartTime|date_tostring}</td></tr>
+  <tr><th>Last Checkpoint</th><td>{@if cond="{LastCheckpointTime} === 0"}Never{:else}{LastCheckpointTime|date_tostring}{/if}</td></tr>
+  <tr><th>Checkpoint Period</th><td>{CheckpointPeriod} seconds</td></tr>
+  <tr><th>Checkpoint Size</th><td>{TxnCount|fmt_bytes}</td></tr>
+</table>
+
+<div class="page-header"><h2><small>Checkpoint Image URI</small></h2></div>
+<ul>
+  {#CheckpointDirectories}
+  <li>{.}</li>
+  {/CheckpointDirectories}
+</ul>
+
+<div class="page-header"><h2><small>Checkpoint Editlog URI</small></h2></div>
+<ul>
+  {#CheckpointEditlogDirectories}
+  <li>{.}</li>
+  {/CheckpointEditlogDirectories}
+</ul>
+{/snn}
+</script>
+
+<script type="text/javascript" src="/static/jquery-1.10.2.min.js">
+</script><script type="text/javascript" src="/static/bootstrap-3.0.2/js/bootstrap.min.js">
+</script><script type="text/javascript" src="/static/dust-full-2.0.0.min.js">
+</script><script type="text/javascript" src="/static/dust-helpers-1.1.1.min.js">
+</script><script type="text/javascript" src="/static/dfs-dust.js">
+</script><script type="text/javascript" src="snn.js">
+</script>
+</body>
+</html>

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCheckpoint.java

@@ -2441,8 +2441,8 @@ public class TestCheckpoint {
   
   private static List<File> getCheckpointCurrentDirs(SecondaryNameNode secondary) {
     List<File> ret = Lists.newArrayList();
-    for (URI u : secondary.getCheckpointDirs()) {
-      File checkpointDir = new File(u.getPath());
+    for (String u : secondary.getCheckpointDirectories()) {
+      File checkpointDir = new File(URI.create(u).getPath());
       ret.add(new File(checkpointDir, "current"));
     }
     return ret;

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestSecondaryWebUi.java

@@ -17,20 +17,18 @@
  */
 package org.apache.hadoop.hdfs.server.namenode;
 
-import static org.junit.Assert.assertTrue;
-
-import java.io.IOException;
-import java.net.MalformedURLException;
-import java.net.URL;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.DFSConfigKeys;
-import org.apache.hadoop.hdfs.DFSTestUtil;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.junit.AfterClass;
+import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
+import javax.management.*;
+import java.io.IOException;
+import java.lang.management.ManagementFactory;
+
 public class TestSecondaryWebUi {
   
   private static MiniDFSCluster cluster;
@@ -59,18 +57,20 @@ public class TestSecondaryWebUi {
   }
 
   @Test
-  public void testSecondaryWebUi() throws IOException {
-    String pageContents = DFSTestUtil.urlGet(new URL("http://localhost:" +
-        SecondaryNameNode.getHttpAddress(conf).getPort() + "/status.jsp"));
-    assertTrue("Didn't find \"Last Checkpoint\"",
-        pageContents.contains("Last Checkpoint"));
-  }
-  
-  @Test
-  public void testSecondaryWebJmx() throws MalformedURLException, IOException {
-    String pageContents = DFSTestUtil.urlGet(new URL("http://localhost:" +
-        SecondaryNameNode.getHttpAddress(conf).getPort() + "/jmx"));
-    assertTrue(pageContents.contains(
-        "Hadoop:service=SecondaryNameNode,name=JvmMetrics"));
+  public void testSecondaryWebUi()
+          throws IOException, MalformedObjectNameException,
+                 AttributeNotFoundException, MBeanException,
+                 ReflectionException, InstanceNotFoundException {
+    MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
+    ObjectName mxbeanName = new ObjectName(
+            "Hadoop:service=SecondaryNameNode,name=SecondaryNameNodeInfo");
+
+    String[] checkpointDir = (String[]) mbs.getAttribute(mxbeanName,
+            "CheckpointDirectories");
+    Assert.assertArrayEquals(checkpointDir, snn.getCheckpointDirectories());
+    String[] checkpointEditlogDir = (String[]) mbs.getAttribute(mxbeanName,
+            "CheckpointEditlogDirectories");
+    Assert.assertArrayEquals(checkpointEditlogDir,
+            snn.getCheckpointEditlogDirectories());
   }
 }