YARN-2492. Added node-labels page on RM web UI. Contributed by Wangda Tan

hadoop-yarn-project/CHANGES.txt

@@ -155,6 +155,8 @@ Release 2.7.0 - UNRELEASED
     YARN-2993. Several fixes (missing acl check, error log msg ...) and some 
     refinement in AdminService. (Yi Liu via junping_du)
 
+    YARN-2943. Added node-labels page on RM web UI. (Wangda Tan via jianhe)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/CommonNodeLabelsManager.java

@@ -72,8 +72,8 @@ public class CommonNodeLabelsManager extends AbstractService {
 
   protected Dispatcher dispatcher;
 
-  protected ConcurrentMap<String, Label> labelCollections =
-      new ConcurrentHashMap<String, Label>();
+  protected ConcurrentMap<String, NodeLabel> labelCollections =
+      new ConcurrentHashMap<String, NodeLabel>();
   protected ConcurrentMap<String, Host> nodeCollections =
       new ConcurrentHashMap<String, Host>();
 
@@ -82,19 +82,6 @@ public class CommonNodeLabelsManager extends AbstractService {
 
   protected NodeLabelsStore store;
 
-  protected static class Label {
-    private Resource resource;
-
-    protected Label() {
-      this.resource = Resource.newInstance(0, 0);
-    }
-
-    public Resource getResource() {
-      return this.resource;
-    }
-
-  }
-
   /**
    * A <code>Host</code> can have multiple <code>Node</code>s 
    */
@@ -201,7 +188,7 @@ public class CommonNodeLabelsManager extends AbstractService {
   protected void serviceInit(Configuration conf) throws Exception {
     initNodeLabelStore(conf);
     
-    labelCollections.put(NO_LABEL, new Label());
+    labelCollections.put(NO_LABEL, new NodeLabel(NO_LABEL));
   }
 
   protected void initNodeLabelStore(Configuration conf) throws Exception {
@@ -271,7 +258,7 @@ public class CommonNodeLabelsManager extends AbstractService {
     for (String label : labels) {
       // shouldn't overwrite it to avoid changing the Label.resource
       if (this.labelCollections.get(label) == null) {
-        this.labelCollections.put(label, new Label());
+        this.labelCollections.put(label, new NodeLabel(label));
         newLabels.add(label);
       }
     }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/NodeLabel.java

@@ -0,0 +1,96 @@
+/**
+ * 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.nodelabels;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.hadoop.yarn.api.records.Resource;
+import org.apache.hadoop.yarn.util.resource.Resources;
+
+public class NodeLabel implements Comparable<NodeLabel> {
+  private Resource resource;
+  private int numActiveNMs;
+  private String labelName;
+
+  public NodeLabel(String labelName) {
+    this(labelName, Resource.newInstance(0, 0), 0);
+  }
+  
+  protected NodeLabel(String labelName, Resource res, int activeNMs) {
+    this.labelName = labelName;
+    this.resource = res;
+    this.numActiveNMs = activeNMs;
+  }
+  
+  public void addNode(Resource nodeRes) {
+    Resources.addTo(resource, nodeRes);
+    numActiveNMs++;
+  }
+  
+  public void removeNode(Resource nodeRes) {
+    Resources.subtractFrom(resource, nodeRes);
+    numActiveNMs--;
+  }
+
+  public Resource getResource() {
+    return this.resource;
+  }
+
+  public int getNumActiveNMs() {
+    return numActiveNMs;
+  }
+  
+  public String getLabelName() {
+    return labelName;
+  }
+  
+  public NodeLabel getCopy() {
+    return new NodeLabel(labelName, resource, numActiveNMs);
+  }
+  
+  @Override
+  public int compareTo(NodeLabel o) {
+    // We should always put empty label entry first after sorting
+    if (labelName.isEmpty() != o.getLabelName().isEmpty()) {
+      if (labelName.isEmpty()) {
+        return -1;
+      }
+      return 1;
+    }
+    
+    return labelName.compareTo(o.getLabelName());
+  }
+  
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof NodeLabel) {
+      NodeLabel other = (NodeLabel) obj;
+      return Resources.equals(resource, other.getResource())
+          && StringUtils.equals(labelName, other.getLabelName())
+          && (other.getNumActiveNMs() == numActiveNMs); 
+    }
+    return false;
+  }
+  
+  @Override
+  public int hashCode() {
+    final int prime = 502357;
+    return (int) ((((long) labelName.hashCode() << 8)
+        + (resource.hashCode() << 4) + numActiveNMs) % prime);
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnWebParams.java

@@ -32,4 +32,5 @@ public interface YarnWebParams {
   String APP_STATE = "app.state";
   String QUEUE_NAME = "queue.name";
   String NODE_STATE = "node.state";
+  String NODE_LABEL = "node.label";
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/RMNodeLabelsManager.java

@@ -19,10 +19,12 @@
 package org.apache.hadoop.yarn.server.resourcemanager.nodelabels;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
@@ -37,6 +39,7 @@ import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.event.Dispatcher;
 import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
+import org.apache.hadoop.yarn.nodelabels.NodeLabel;
 import org.apache.hadoop.yarn.server.resourcemanager.RMContext;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.NodeLabelsUpdateSchedulerEvent;
 import org.apache.hadoop.yarn.util.resource.Resources;
@@ -360,8 +363,8 @@ public class RMNodeLabelsManager extends CommonNodeLabelsManager {
         // no label in the past
         if (oldLabels.isEmpty()) {
           // update labels
-          Label label = labelCollections.get(NO_LABEL);
-          Resources.subtractFrom(label.getResource(), oldNM.resource);
+          NodeLabel label = labelCollections.get(NO_LABEL);
+          label.removeNode(oldNM.resource);
 
           // update queues, all queue can access this node
           for (Queue q : queueCollections.values()) {
@@ -370,11 +373,11 @@ public class RMNodeLabelsManager extends CommonNodeLabelsManager {
         } else {
           // update labels
           for (String labelName : oldLabels) {
-            Label label = labelCollections.get(labelName);
+            NodeLabel label = labelCollections.get(labelName);
             if (null == label) {
               continue;
             }
-            Resources.subtractFrom(label.getResource(), oldNM.resource);
+            label.removeNode(oldNM.resource);
           }
 
           // update queues, only queue can access this node will be subtract
@@ -395,8 +398,8 @@ public class RMNodeLabelsManager extends CommonNodeLabelsManager {
         // no label in the past
         if (newLabels.isEmpty()) {
           // update labels
-          Label label = labelCollections.get(NO_LABEL);
-          Resources.addTo(label.getResource(), newNM.resource);
+          NodeLabel label = labelCollections.get(NO_LABEL);
+          label.addNode(newNM.resource);
 
           // update queues, all queue can access this node
           for (Queue q : queueCollections.values()) {
@@ -405,8 +408,8 @@ public class RMNodeLabelsManager extends CommonNodeLabelsManager {
         } else {
           // update labels
           for (String labelName : newLabels) {
-            Label label = labelCollections.get(labelName);
-            Resources.addTo(label.getResource(), newNM.resource);
+            NodeLabel label = labelCollections.get(labelName);
+            label.addNode(newNM.resource);
           }
 
           // update queues, only queue can access this node will be subtract
@@ -475,4 +478,21 @@ public class RMNodeLabelsManager extends CommonNodeLabelsManager {
   public void setRMContext(RMContext rmContext) {
     this.rmContext = rmContext;
   }
+
+  public List<NodeLabel> pullRMNodeLabelsInfo() {
+    try {
+      readLock.lock();
+      List<NodeLabel> infos = new ArrayList<NodeLabel>();
+
+      for (Entry<String, NodeLabel> entry : labelCollections.entrySet()) {
+        NodeLabel label = entry.getValue();
+        infos.add(label.getCopy());
+      }
+
+      Collections.sort(infos);
+      return infos;
+    } finally {
+      readLock.unlock();
+    }
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/NavBlock.java

@@ -33,7 +33,8 @@ public class NavBlock extends HtmlBlock {
         h3("Cluster").
         ul().
           li().a(url("cluster"), "About")._().
-          li().a(url("nodes"), "Nodes")._();
+          li().a(url("nodes"), "Nodes")._().
+          li().a(url("nodelabels"), "Node Labels")._();
     UL<LI<UL<DIV<Hamlet>>>> subAppsList = mainList.
           li().a(url("apps"), "Applications").
             ul();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/NodeLabelsPage.java

@@ -0,0 +1,91 @@
+/**
+ * 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.resourcemanager.webapp;
+
+import static org.apache.hadoop.yarn.webapp.view.JQueryUI.DATATABLES_ID;
+
+import org.apache.hadoop.yarn.nodelabels.NodeLabel;
+import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
+import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager;
+import org.apache.hadoop.yarn.webapp.SubView;
+import org.apache.hadoop.yarn.webapp.YarnWebParams;
+import org.apache.hadoop.yarn.webapp.hamlet.Hamlet;
+import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TABLE;
+import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TBODY;
+import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TR;
+import org.apache.hadoop.yarn.webapp.view.HtmlBlock;
+
+import com.google.inject.Inject;
+
+public class NodeLabelsPage extends RmView {
+  static class NodeLabelsBlock extends HtmlBlock {
+    final ResourceManager rm;
+
+    @Inject
+    NodeLabelsBlock(ResourceManager rm, ViewContext ctx) {
+      super(ctx);
+      this.rm = rm;
+    }
+
+    @Override
+    protected void render(Block html) {
+      TBODY<TABLE<Hamlet>> tbody = html.table("#nodelabels").
+          thead().
+          tr().
+          th(".name", "Label Name").
+          th(".numOfActiveNMs", "Num Of Active NMs").
+          th(".totalResource", "Total Resource").
+          _()._().
+          tbody();
+  
+      RMNodeLabelsManager nlm = rm.getRMContext().getNodeLabelManager();
+      for (NodeLabel info : nlm.pullRMNodeLabelsInfo()) {
+        TR<TBODY<TABLE<Hamlet>>> row =
+            tbody.tr().td(
+                info.getLabelName().isEmpty() ? "<NO_LABEL>" : info
+                    .getLabelName());
+        int nActiveNMs = info.getNumActiveNMs();
+        if (nActiveNMs > 0) {
+          row = row.td()
+          .a(url("nodes",
+              "?" + YarnWebParams.NODE_LABEL + "=" + info.getLabelName()),
+              String.valueOf(nActiveNMs))
+           ._();
+        } else {
+          row = row.td(String.valueOf(nActiveNMs));
+        }
+        row.td(info.getResource().toString())._();
+      }
+      tbody._()._();
+    }
+  }
+
+  @Override protected void preHead(Page.HTML<_> html) {
+    commonPreHead(html);
+    String title = "Node labels of the cluster";
+    setTitle(title);
+    set(DATATABLES_ID, "nodelabels");
+    setTableStyles(html, "nodelabels", ".healthStatus {width:10em}",
+                   ".healthReport {width:10em}");
+  }
+
+  @Override protected Class<? extends SubView> content() {
+    return NodeLabelsBlock.class;
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/NodesPage.java

@@ -1,24 +1,25 @@
 /**
-* 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.
-*/
+ * 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.resourcemanager.webapp;
 
-import static org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebApp.NODE_STATE;
+import static org.apache.hadoop.yarn.webapp.YarnWebParams.NODE_STATE;
+import static org.apache.hadoop.yarn.webapp.YarnWebParams.NODE_LABEL;
 import static org.apache.hadoop.yarn.webapp.view.JQueryUI.DATATABLES;
 import static org.apache.hadoop.yarn.webapp.view.JQueryUI.DATATABLES_ID;
 import static org.apache.hadoop.yarn.webapp.view.JQueryUI.initID;
@@ -28,7 +29,9 @@ import java.util.Collection;
 
 import org.apache.hadoop.util.StringUtils;
 import org.apache.hadoop.yarn.api.records.NodeState;
+import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
 import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
+import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager;
 import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.ResourceScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeInfo;
@@ -60,26 +63,20 @@ class NodesPage extends RmView {
 
       ResourceScheduler sched = rm.getResourceScheduler();
       String type = $(NODE_STATE);
-      TBODY<TABLE<Hamlet>> tbody = html.table("#nodes").
-          thead().
-          tr().
-          th(".nodelabels", "Node Labels").
-          th(".rack", "Rack").
-          th(".state", "Node State").
-          th(".nodeaddress", "Node Address").
-          th(".nodehttpaddress", "Node HTTP Address").
-          th(".lastHealthUpdate", "Last health-update").
-          th(".healthReport", "Health-report").
-          th(".containers", "Containers").
-          th(".mem", "Mem Used").
-          th(".mem", "Mem Avail").
-          th(".vcores", "VCores Used").
-          th(".vcores", "VCores Avail").
-          th(".nodeManagerVersion", "Version").
-          _()._().
-          tbody();
+      String labelFilter = $(NODE_LABEL, CommonNodeLabelsManager.ANY).trim();
+      TBODY<TABLE<Hamlet>> tbody =
+          html.table("#nodes").thead().tr().th(".nodelabels", "Node Labels")
+              .th(".rack", "Rack").th(".state", "Node State")
+              .th(".nodeaddress", "Node Address")
+              .th(".nodehttpaddress", "Node HTTP Address")
+              .th(".lastHealthUpdate", "Last health-update")
+              .th(".healthReport", "Health-report")
+              .th(".containers", "Containers").th(".mem", "Mem Used")
+              .th(".mem", "Mem Avail").th(".vcores", "VCores Used")
+              .th(".vcores", "VCores Avail")
+              .th(".nodeManagerVersion", "Version")._()._().tbody();
       NodeState stateFilter = null;
-      if(type != null && !type.isEmpty()) {
+      if (type != null && !type.isEmpty()) {
         stateFilter = NodeState.valueOf(type.toUpperCase());
       }
       Collection<RMNode> rmNodes = this.rm.getRMContext().getRMNodes().values();
@@ -97,9 +94,9 @@ class NodesPage extends RmView {
         }
       }
       for (RMNode ni : rmNodes) {
-        if(stateFilter != null) {
+        if (stateFilter != null) {
           NodeState state = ni.getState();
-          if(!stateFilter.equals(state)) {
+          if (!stateFilter.equals(state)) {
             continue;
           }
         } else {
@@ -109,61 +106,71 @@ class NodesPage extends RmView {
             continue;
           }
         }
+        // Besides state, we need to filter label as well.
+        if (!labelFilter.equals(RMNodeLabelsManager.ANY)) {
+          if (labelFilter.isEmpty()) {
+            // Empty label filter means only shows nodes without label
+            if (!ni.getNodeLabels().isEmpty()) {
+              continue;
+            }
+          } else if (!ni.getNodeLabels().contains(labelFilter)) {
+            // Only nodes have given label can show on web page.
+            continue;
+          }
+        }
         NodeInfo info = new NodeInfo(ni, sched);
-        int usedMemory = (int)info.getUsedMemory();
-        int availableMemory = (int)info.getAvailableMemory();
-        TR<TBODY<TABLE<Hamlet>>> row = tbody.tr().
-            td(StringUtils.join(",", info.getNodeLabels())).
-            td(info.getRack()).
-            td(info.getState()).
-            td(info.getNodeId());
+        int usedMemory = (int) info.getUsedMemory();
+        int availableMemory = (int) info.getAvailableMemory();
+        TR<TBODY<TABLE<Hamlet>>> row =
+            tbody.tr().td(StringUtils.join(",", info.getNodeLabels()))
+                .td(info.getRack()).td(info.getState()).td(info.getNodeId());
         if (isInactive) {
           row.td()._("N/A")._();
         } else {
           String httpAddress = info.getNodeHTTPAddress();
-          row.td().a("//" + httpAddress,
-              httpAddress)._();
+          row.td().a("//" + httpAddress, httpAddress)._();
         }
-        row.td().br().$title(String.valueOf(info.getLastHealthUpdate()))._().
-              _(Times.format(info.getLastHealthUpdate()))._().
-            td(info.getHealthReport()).
-            td(String.valueOf(info.getNumContainers())).
-            td().br().$title(String.valueOf(usedMemory))._().
-              _(StringUtils.byteDesc(usedMemory * BYTES_IN_MB))._().
-            td().br().$title(String.valueOf(availableMemory))._().
-              _(StringUtils.byteDesc(availableMemory * BYTES_IN_MB))._().
-              td(String.valueOf(info.getUsedVirtualCores())).
-              td(String.valueOf(info.getAvailableVirtualCores())).
-            td(ni.getNodeManagerVersion()).
-            _();
+        row.td().br().$title(String.valueOf(info.getLastHealthUpdate()))._()
+            ._(Times.format(info.getLastHealthUpdate()))._()
+            .td(info.getHealthReport())
+            .td(String.valueOf(info.getNumContainers())).td().br()
+            .$title(String.valueOf(usedMemory))._()
+            ._(StringUtils.byteDesc(usedMemory * BYTES_IN_MB))._().td().br()
+            .$title(String.valueOf(availableMemory))._()
+            ._(StringUtils.byteDesc(availableMemory * BYTES_IN_MB))._()
+            .td(String.valueOf(info.getUsedVirtualCores()))
+            .td(String.valueOf(info.getAvailableVirtualCores()))
+            .td(ni.getNodeManagerVersion())._();
       }
       tbody._()._();
     }
   }
 
-  @Override protected void preHead(Page.HTML<_> html) {
+  @Override
+  protected void preHead(Page.HTML<_> html) {
     commonPreHead(html);
     String type = $(NODE_STATE);
     String title = "Nodes of the cluster";
-    if(type != null && !type.isEmpty()) {
-      title = title+" ("+type+")";
+    if (type != null && !type.isEmpty()) {
+      title = title + " (" + type + ")";
     }
     setTitle(title);
     set(DATATABLES_ID, "nodes");
     set(initID(DATATABLES, "nodes"), nodesTableInit());
     setTableStyles(html, "nodes", ".healthStatus {width:10em}",
-                   ".healthReport {width:10em}");
+        ".healthReport {width:10em}");
   }
 
-  @Override protected Class<? extends SubView> content() {
+  @Override
+  protected Class<? extends SubView> content() {
     return NodesBlock.class;
   }
 
   private String nodesTableInit() {
     StringBuilder b = tableInit().append(", aoColumnDefs: [");
     b.append("{'bSearchable': false, 'aTargets': [ 6 ]}");
-    b.append(", {'sType': 'title-numeric', 'bSearchable': false, " +
-        "'aTargets': [ 7, 8 ] }");
+    b.append(", {'sType': 'title-numeric', 'bSearchable': false, "
+        + "'aTargets': [ 7, 8 ] }");
     b.append(", {'sType': 'title-numeric', 'aTargets': [ 4 ]}");
     b.append("]}");
     return b.toString();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMWebApp.java

@@ -61,6 +61,7 @@ public class RMWebApp extends WebApp implements YarnWebParams {
     route(pajoin("/app", APPLICATION_ID), RmController.class, "app");
     route("/scheduler", RmController.class, "scheduler");
     route(pajoin("/queue", QUEUE_NAME), RmController.class, "queue");
+    route("/nodelabels", RmController.class, "nodelabels");
   }
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RmController.java

@@ -28,7 +28,6 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.Capacity
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
 import org.apache.hadoop.yarn.util.StringHelper;
 import org.apache.hadoop.yarn.webapp.Controller;
-import org.apache.hadoop.yarn.webapp.WebAppException;
 import org.apache.hadoop.yarn.webapp.YarnWebParams;
 
 import com.google.inject.Inject;
@@ -93,4 +92,9 @@ public class RmController extends Controller {
   public void submit() {
     setTitle("Application Submission Not Allowed");
   }
+  
+  public void nodelabels() {
+    setTitle("Node Labels");
+    render(NodeLabelsPage.class);
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/MockNodes.java

@@ -30,11 +30,13 @@ import org.apache.hadoop.yarn.api.records.NodeState;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.factories.RecordFactory;
 import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
+import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
 import org.apache.hadoop.yarn.server.api.protocolrecords.NodeHeartbeatResponse;
 import org.apache.hadoop.yarn.server.resourcemanager.nodelabels.RMNodeLabelsManager;
 import org.apache.hadoop.yarn.server.resourcemanager.rmnode.RMNode;
 import org.apache.hadoop.yarn.server.resourcemanager.rmnode.UpdatedContainerInfo;
 
+import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 
 /**
@@ -53,7 +55,12 @@ public class MockNodes {
           // One unhealthy node per rack.
           list.add(nodeInfo(i, perNode, NodeState.UNHEALTHY));
         }
-        list.add(newNodeInfo(i, perNode));
+        if (j == 0) {
+          // One node with label
+          list.add(nodeInfo(i, perNode, NodeState.RUNNING, ImmutableSet.of("x")));
+        } else {
+          list.add(newNodeInfo(i, perNode));
+        }
       }
     }
     return list;
@@ -100,10 +107,12 @@ public class MockNodes {
     private String healthReport;
     private long lastHealthReportTime;
     private NodeState state;
+    private Set<String> labels;
 
     public MockRMNodeImpl(NodeId nodeId, String nodeAddr, String httpAddress,
         Resource perNode, String rackName, String healthReport,
-        long lastHealthReportTime, int cmdPort, String hostName, NodeState state) {
+        long lastHealthReportTime, int cmdPort, String hostName, NodeState state,
+        Set<String> labels) {
       this.nodeId = nodeId;
       this.nodeAddr = nodeAddr;
       this.httpAddress = httpAddress;
@@ -114,6 +123,7 @@ public class MockNodes {
       this.cmdPort = cmdPort;
       this.hostName = hostName;
       this.state = state;
+      this.labels = labels;
     }
 
     @Override
@@ -207,16 +217,33 @@ public class MockNodes {
 
     @Override
     public Set<String> getNodeLabels() {
-      return RMNodeLabelsManager.EMPTY_STRING_SET;
+      if (labels != null) {
+        return labels;
+      }
+      return CommonNodeLabelsManager.EMPTY_STRING_SET;
     }
   };
 
-  private static RMNode buildRMNode(int rack, final Resource perNode, NodeState state, String httpAddr) {
-    return buildRMNode(rack, perNode, state, httpAddr, NODE_ID++, null, 123);
+  private static RMNode buildRMNode(int rack, final Resource perNode,
+      NodeState state, String httpAddr) {
+    return buildRMNode(rack, perNode, state, httpAddr, null);
   }
-
+  
+  private static RMNode buildRMNode(int rack, final Resource perNode,
+      NodeState state, String httpAddr, Set<String> labels) {
+    return buildRMNode(rack, perNode, state, httpAddr, NODE_ID++, null, 123,
+        labels);
+  }
+  
   private static RMNode buildRMNode(int rack, final Resource perNode,
       NodeState state, String httpAddr, int hostnum, String hostName, int port) {
+    return buildRMNode(rack, perNode, state, httpAddr, hostnum, hostName, port,
+        null);
+  }
+
+  private static RMNode buildRMNode(int rack, final Resource perNode,
+      NodeState state, String httpAddr, int hostnum, String hostName, int port,
+      Set<String> labels) {
     final String rackName = "rack"+ rack;
     final int nid = hostnum;
     final String nodeAddr = hostName + ":" + nid;
@@ -228,13 +255,18 @@ public class MockNodes {
     final String httpAddress = httpAddr;
     String healthReport = (state == NodeState.UNHEALTHY) ? null : "HealthyMe";
     return new MockRMNodeImpl(nodeID, nodeAddr, httpAddress, perNode,
-        rackName, healthReport, 0, nid, hostName, state);
+        rackName, healthReport, 0, nid, hostName, state, labels);
   }
 
   public static RMNode nodeInfo(int rack, final Resource perNode,
       NodeState state) {
     return buildRMNode(rack, perNode, state, "N/A");
   }
+  
+  public static RMNode nodeInfo(int rack, final Resource perNode,
+      NodeState state, Set<String> labels) {
+    return buildRMNode(rack, perNode, state, "N/A", labels);
+  }
 
   public static RMNode newNodeInfo(int rack, final Resource perNode) {
     return buildRMNode(rack, perNode, NodeState.RUNNING, "localhost:0");

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestWorkPreservingRMRestart.java

@@ -839,7 +839,7 @@ public class TestWorkPreservingRMRestart {
   // Test if RM on recovery receives the container release request from AM
   // before it receives the container status reported by NM for recovery. this
   // container should not be recovered.
-  @Test (timeout = 30000)
+  @Test (timeout = 50000)
   public void testReleasedContainerNotRecovered() throws Exception {
     MemoryRMStateStore memStore = new MemoryRMStateStore();
     memStore.init(conf);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/nodelabels/TestRMNodeLabelsManager.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.server.resourcemanager.nodelabels;
 
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
@@ -27,6 +28,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
+import org.apache.hadoop.yarn.nodelabels.NodeLabel;
 import org.apache.hadoop.yarn.nodelabels.NodeLabelTestBase;
 import org.apache.hadoop.yarn.util.resource.Resources;
 import org.junit.After;
@@ -428,4 +430,35 @@ public class TestRMNodeLabelsManager extends NodeLabelTestBase {
       Assert.fail("IOException from removeLabelsFromNode " + e);
     }
   }
+  
+  private void checkNodeLabelInfo(List<NodeLabel> infos, String labelName, int activeNMs, int memory) {
+    for (NodeLabel info : infos) {
+      if (info.getLabelName().equals(labelName)) {
+        Assert.assertEquals(activeNMs, info.getNumActiveNMs());
+        Assert.assertEquals(memory, info.getResource().getMemory());
+        return;
+      }
+    }
+    Assert.fail("Failed to find info has label=" + labelName);
+  }
+  
+  @Test(timeout = 5000)
+  public void testPullRMNodeLabelsInfo() throws IOException {
+    mgr.addToCluserNodeLabels(toSet("x", "y", "z"));
+    mgr.activateNode(NodeId.newInstance("n1", 1), Resource.newInstance(10, 0));
+    mgr.activateNode(NodeId.newInstance("n2", 1), Resource.newInstance(10, 0));
+    mgr.activateNode(NodeId.newInstance("n3", 1), Resource.newInstance(10, 0));
+    mgr.activateNode(NodeId.newInstance("n4", 1), Resource.newInstance(10, 0));
+    mgr.activateNode(NodeId.newInstance("n5", 1), Resource.newInstance(10, 0));
+    mgr.replaceLabelsOnNode(ImmutableMap.of(toNodeId("n1"), toSet("x"),
+        toNodeId("n2"), toSet("x"), toNodeId("n3"), toSet("y")));
+    
+    // x, y, z and ""
+    List<NodeLabel> infos = mgr.pullRMNodeLabelsInfo();
+    Assert.assertEquals(4, infos.size());
+    checkNodeLabelInfo(infos, RMNodeLabelsManager.NO_LABEL, 2, 20);
+    checkNodeLabelInfo(infos, "x", 2, 20);
+    checkNodeLabelInfo(infos, "y", 1, 10);
+    checkNodeLabelInfo(infos, "z", 0, 0);
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestNodesPage.java

@@ -106,4 +106,49 @@ public class TestNodesPage {
             * numberOfActualTableHeaders + numberOfThInMetricsTable)).print(
         "<td");
   }
+  
+  @Test
+  public void testNodesBlockRenderForNodeLabelFilterWithNonEmptyLabel() {
+    NodesBlock nodesBlock = injector.getInstance(NodesBlock.class);
+    nodesBlock.set("node.label", "x");
+    nodesBlock.render();
+    PrintWriter writer = injector.getInstance(PrintWriter.class);
+    WebAppTests.flushOutput(injector);
+
+    Mockito.verify(
+        writer,
+        Mockito.times(numberOfRacks
+            * numberOfActualTableHeaders + numberOfThInMetricsTable)).print(
+        "<td");
+  }
+  
+  @Test
+  public void testNodesBlockRenderForNodeLabelFilterWithEmptyLabel() {
+    NodesBlock nodesBlock = injector.getInstance(NodesBlock.class);
+    nodesBlock.set("node.label", "");
+    nodesBlock.render();
+    PrintWriter writer = injector.getInstance(PrintWriter.class);
+    WebAppTests.flushOutput(injector);
+
+    Mockito.verify(
+        writer,
+        Mockito.times(numberOfRacks * (numberOfNodesPerRack - 1)
+            * numberOfActualTableHeaders + numberOfThInMetricsTable)).print(
+        "<td");
+  }
+  
+  @Test
+  public void testNodesBlockRenderForNodeLabelFilterWithAnyLabel() {
+    NodesBlock nodesBlock = injector.getInstance(NodesBlock.class);
+    nodesBlock.set("node.label", "*");
+    nodesBlock.render();
+    PrintWriter writer = injector.getInstance(PrintWriter.class);
+    WebAppTests.flushOutput(injector);
+
+    Mockito.verify(
+        writer,
+        Mockito.times(numberOfRacks * numberOfNodesPerRack
+            * numberOfActualTableHeaders + numberOfThInMetricsTable)).print(
+        "<td");
+  }
 }