HDFS-6013. add rollingUpgrade information to latest UI. Contributed by Vinayakumar B.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5535@1573700 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES_HDFS-5535.txt

@@ -130,3 +130,7 @@ HDFS-5535 subtasks:
 
     HDFS-6034. Use DataNodeLayoutVersion for DN registration check and do not
     verify layout version if there is a rolling upgrade in progress.  (szetszwo)
+
+    HDFS-6013. add rollingUpgrade information to latest UI.
+    (Vinayakumar B via wheat9)
+

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/RollingUpgradeInfo.java

@@ -94,4 +94,34 @@ public String toString() {
   private static String timestamp2String(long timestamp) {
     return new Date(timestamp) + " (=" + timestamp + ")";
   }
+
+  public static class Bean {
+    private final String blockPoolId;
+    private final long startTime;
+    private final long finalizeTime;
+    private final boolean createdRollbackImages;
+
+    public Bean(RollingUpgradeInfo f) {
+      this.blockPoolId = f.getBlockPoolId();
+      this.startTime = f.startTime;
+      this.finalizeTime = f.finalizeTime;
+      this.createdRollbackImages = f.createdRollbackImages();
+    }
+
+    public String getBlockPoolId() {
+      return blockPoolId;
+    }
+
+    public long getStartTime() {
+      return startTime;
+    }
+
+    public long getFinalizeTime() {
+      return finalizeTime;
+    }
+
+    public boolean isCreatedRollbackImages() {
+      return createdRollbackImages;
+    }
+  }
 }

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

@@ -7247,6 +7247,20 @@ public void setNeedRollbackFsImage(boolean needRollbackFsImage) {
     this.needRollbackFsImage = needRollbackFsImage;
   }
 
+  @Override  // NameNodeMXBean
+  public RollingUpgradeInfo.Bean getRollingUpgradeStatus() {
+    readLock();
+    try {
+      RollingUpgradeInfo upgradeInfo = getRollingUpgradeInfo();
+      if (upgradeInfo != null) {
+        return new RollingUpgradeInfo.Bean(upgradeInfo);
+      }
+      return null;
+    } finally {
+      readUnlock();
+    }
+  }
+
   /** Is rolling upgrade in progress? */
   public boolean isRollingUpgrade() {
     return rollingUpgradeInfo != null;

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

@@ -21,6 +21,7 @@
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo;
 
 /**
  * This is the JMX management interface for namenode information
@@ -78,7 +79,14 @@ public interface NameNodeMXBean {
    * @return true, if upgrade is finalized
    */
   public boolean isUpgradeFinalized();
-  
+
+  /**
+   * Gets the RollingUpgrade information
+   *
+   * @return Rolling upgrade information
+   */
+  public RollingUpgradeInfo.Bean getRollingUpgradeStatus();
+
   /**
    * Gets total used space by data nodes for non DFS purposes such as storing
    * temporary files on the local file system

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

@@ -72,14 +72,26 @@
 <script type="text/x-dust-template" id="tmpl-dfshealth">
 
 {#nn}
-{@if cond="{DistinctVersionCount} > 1"}
+{@if cond="{DistinctVersionCount} > 1 || '{RollingUpgradeStatus}'.length"}
 <div class="alert alert-dismissable alert-info">
   <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
 
-  There are {DistinctVersionCount} versions of datanodes currently live: 
-  {#DistinctVersions}
-  {key} ({value}) {@sep},{/sep}
-  {/DistinctVersions}
+  {#RollingUpgradeStatus}
+    <p>Rolling upgrade started at {#helper_date_tostring value="{startTime}"/}. </br>
+    {#createdRollbackImages}
+      Rollback image has been created. Proceed to upgrade daemons.
+      {:else}
+      Rollback image has not been created.
+    {/createdRollbackImages}
+    </p>
+  {/RollingUpgradeStatus}
+
+  {@if cond="{DistinctVersionCount} > 1"}
+    There are {DistinctVersionCount} versions of datanodes currently live:
+    {#DistinctVersions}
+    {key} ({value}) {@sep},{/sep}
+    {/DistinctVersions}
+  {/if}
 </div>
 {/if}
 

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

@@ -44,6 +44,11 @@
         for (var i in j) {
           chunk.write('<tr><td>' + i + '</td><td>' + j[i] + '</td><td>' + params.type + '</td></tr>');
         }
+      },
+
+      'helper_date_tostring' : function (chunk, ctx, bodies, params) {
+        var value = dust.helpers.tap(params.value, chunk, ctx);
+        return chunk.write('' + new Date(Number(value)).toLocaleString());
       }
     };