YARN-3326. Support RESTful API for getLabelsToNodes. Contributed by Naganarasimha G R.

hadoop-yarn-project/CHANGES.txt

@@ -78,6 +78,9 @@ Release 2.8.0 - UNRELEASED
     YARN-3318. Create Initial OrderingPolicy Framework and FifoOrderingPolicy.
     (Craig Welch via wangda)
 
+    YARN-3326. Support RESTful API for getLabelsToNodes. (Naganarasimha G R
+    via ozawa)
+
   IMPROVEMENTS
 
     YARN-1880. Cleanup TestApplicationClientProtocolOnHA

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

@@ -0,0 +1,47 @@
+/**
+ * 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 java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement(name = "labelsToNodesInfo")
+@XmlAccessorType(XmlAccessType.FIELD)
+public class NodeIDsInfo {
+
+  /**
+   * Set doesn't support default no arg constructor which is req by JAXB
+   */
+  protected ArrayList<String> nodeIDsList = new ArrayList<String>();
+
+  public NodeIDsInfo() {
+  } // JAXB needs this
+
+  public NodeIDsInfo(List<String> nodeIdsList) {
+    this.nodeIDsList.addAll(nodeIdsList);
+  }
+
+  public ArrayList<String> getNodeIDs() {
+    return nodeIDsList;
+  }
+}

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

@@ -20,10 +20,11 @@ package org.apache.hadoop.yarn.server.resourcemanager.webapp;
 
 import java.io.IOException;
 import java.lang.reflect.UndeclaredThrowableException;
-import java.security.AccessControlException;
 import java.nio.ByteBuffer;
+import java.security.AccessControlException;
 import java.security.Principal;
 import java.security.PrivilegedExceptionAction;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.EnumSet;
@@ -31,6 +32,7 @@ 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;
 import java.util.concurrent.ConcurrentMap;
 
@@ -64,25 +66,25 @@ import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod;
 import org.apache.hadoop.security.authentication.server.KerberosAuthenticationHandler;
 import org.apache.hadoop.security.authorize.AuthorizationException;
+import org.apache.hadoop.security.token.SecretManager.InvalidToken;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationHandler;
 import org.apache.hadoop.util.StringUtils;
+import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.GetNewApplicationRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.GetNewApplicationResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.KillApplicationResponse;
-import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.MoveApplicationAcrossQueuesRequest;
-import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
-import org.apache.hadoop.security.token.SecretManager.InvalidToken;
-import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenRequest;
-import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenResponse;
-import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenRequest;
-import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenResponse;
 import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenResponse;
-import org.apache.hadoop.yarn.api.protocolrecords.MoveApplicationAcrossQueuesRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationRequest;
+import org.apache.hadoop.yarn.api.protocolrecords.SubmitApplicationResponse;
 import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.ApplicationReport;
@@ -116,12 +118,11 @@ import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairSchedule
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppAttemptInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppAttemptsInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NewApplication;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppState;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppQueue;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ApplicationSubmissionContextInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppState;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ApplicationStatisticsInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ApplicationSubmissionContextInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.AppsInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.CapacitySchedulerInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ClusterInfo;
@@ -130,15 +131,17 @@ import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.CredentialsInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.DelegationToken;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.FairSchedulerInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.FifoSchedulerInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.LabelsToNodesInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.LocalResourceInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NewApplication;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeLabelsInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeToLabelsInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodesInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ResourceInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedulerInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.SchedulerTypeInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.StatisticsItemInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeLabelsInfo;
-import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeToLabelsInfo;
 import org.apache.hadoop.yarn.server.utils.BuilderUtils;
 import org.apache.hadoop.yarn.util.AdHocLogDumper;
 import org.apache.hadoop.yarn.util.ConverterUtils;
@@ -781,7 +784,35 @@ public class RMWebServices {
 
     return ntl;
   }
-  
+
+  @GET
+  @Path("/label-mappings")
+  @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })
+  public LabelsToNodesInfo getLabelsToNodes(
+      @QueryParam("labels") Set<String> labels) throws IOException {
+    init();
+
+    LabelsToNodesInfo lts = new LabelsToNodesInfo();
+    Map<String, NodeIDsInfo> ltsMap = lts.getLabelsToNodes();
+    Map<String, Set<NodeId>> labelsToNodeId = null;
+    if (labels == null || labels.size() == 0) {
+      labelsToNodeId =
+          rm.getRMContext().getNodeLabelManager().getLabelsToNodes();
+    } else {
+      labelsToNodeId =
+          rm.getRMContext().getNodeLabelManager().getLabelsToNodes(labels);
+    }
+
+    for (Entry<String, Set<NodeId>> entry : labelsToNodeId.entrySet()) {
+      List<String> nodeIdStrList = new ArrayList<String>();
+      for (NodeId nodeId : entry.getValue()) {
+        nodeIdStrList.add(nodeId.toString());
+      }
+      ltsMap.put(entry.getKey(), new NodeIDsInfo(nodeIdStrList));
+    }
+    return lts;
+  }
+
   @POST
   @Path("/replace-node-to-labels")
   @Produces({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML })

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

@@ -0,0 +1,43 @@
+/**
+ * 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.dao;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.NodeIDsInfo;
+
+@XmlRootElement(name = "labelsToNodesInfo")
+@XmlAccessorType(XmlAccessType.FIELD)
+public class LabelsToNodesInfo {
+
+  protected Map<String, NodeIDsInfo> labelsToNodes =
+    new HashMap<String, NodeIDsInfo>();
+
+  public LabelsToNodesInfo() {
+  } // JAXB needs this
+
+  public Map<String, NodeIDsInfo> getLabelsToNodes() {
+   return labelsToNodes;
+  }
+}

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

@@ -33,6 +33,7 @@ import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.resourcemanager.MockRM;
 import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.LabelsToNodesInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeLabelsInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeToLabelsInfo;
 import org.apache.hadoop.yarn.webapp.GenericExceptionHandler;
@@ -51,6 +52,7 @@ import com.sun.jersey.api.client.WebResource;
 import com.sun.jersey.api.json.JSONJAXBContext;
 import com.sun.jersey.api.json.JSONMarshaller;
 import com.sun.jersey.api.json.JSONUnmarshaller;
+import com.sun.jersey.core.util.MultivaluedMapImpl;
 import com.sun.jersey.guice.spi.container.servlet.GuiceContainer;
 import com.sun.jersey.test.framework.WebAppDescriptor;
 
@@ -160,6 +162,59 @@ public class TestRMWebServicesNodeLabels extends JerseyTestBase {
             .post(ClientResponse.class);
     LOG.info("posted node nodelabel");
 
+    // Add labels to another node
+    response =
+        r.path("ws").path("v1").path("cluster")
+            .path("nodes").path("nid1:0")
+            .path("replace-labels")
+            .queryParam("user.name", userName)
+            .accept(MediaType.APPLICATION_JSON)
+            .entity("{\"nodeLabels\": [\"b\"]}",
+              MediaType.APPLICATION_JSON)
+            .post(ClientResponse.class);
+    LOG.info("posted node nodelabel");
+
+    // Add labels to another node
+    response =
+        r.path("ws").path("v1").path("cluster")
+            .path("nodes").path("nid2:0")
+            .path("replace-labels")
+            .queryParam("user.name", userName)
+            .accept(MediaType.APPLICATION_JSON)
+            .entity("{\"nodeLabels\": [\"b\"]}",
+              MediaType.APPLICATION_JSON)
+            .post(ClientResponse.class);
+    LOG.info("posted node nodelabel");
+
+    // Verify, using get-labels-to-Nodes
+    response =
+        r.path("ws").path("v1").path("cluster")
+            .path("label-mappings").queryParam("user.name", userName)
+            .accept(MediaType.APPLICATION_JSON).get(ClientResponse.class);
+    assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
+    LabelsToNodesInfo ltni = response.getEntity(LabelsToNodesInfo.class);
+    assertEquals(2, ltni.getLabelsToNodes().size());
+    NodeIDsInfo nodes = ltni.getLabelsToNodes().get("b");
+    assertTrue(nodes.getNodeIDs().contains("nid2:0"));
+    assertTrue(nodes.getNodeIDs().contains("nid1:0"));
+    nodes = ltni.getLabelsToNodes().get("a");
+    assertTrue(nodes.getNodeIDs().contains("nid:0"));
+
+    // Verify, using get-labels-to-Nodes for specifiedset of labels
+    MultivaluedMapImpl params = new MultivaluedMapImpl();
+    params.add("labels", "a");
+    response =
+        r.path("ws").path("v1").path("cluster")
+            .path("label-mappings").queryParam("user.name", userName)
+            .queryParams(params)
+            .accept(MediaType.APPLICATION_JSON)
+            .get(ClientResponse.class);
+    assertEquals(MediaType.APPLICATION_JSON_TYPE, response.getType());
+    ltni = response.getEntity(LabelsToNodesInfo.class);
+    assertEquals(1, ltni.getLabelsToNodes().size());
+    nodes = ltni.getLabelsToNodes().get("a");
+    assertTrue(nodes.getNodeIDs().contains("nid:0"));
+
     // Verify
     response =
         r.path("ws").path("v1").path("cluster")