HDFS-12333. Ozone: Extend Datanode web interface with SCM information. Contributed by Elek, Marton.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/interfaces/ContainerLocationManagerMXBean.java

@@ -0,0 +1,36 @@
+/*
+ * 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.ozone.container.common.interfaces;
+
+import org.apache.hadoop.ozone.container.common.impl.StorageLocationReport;
+
+import java.io.IOException;
+
+/**
+ * Returns physical path locations, where the containers will be created.
+ */
+public interface ContainerLocationManagerMXBean {
+
+  /**
+   * Returns an array of storage location usage report.
+   *
+   * @return storage location usage report.
+   */
+  StorageLocationReport[] getLocationReport() throws IOException;
+
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/EndpointStateMachine.java

@@ -28,6 +28,7 @@ import org.slf4j.LoggerFactory;
 import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
+import java.time.ZonedDateTime;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
@@ -35,7 +36,8 @@ import java.util.concurrent.locks.ReentrantLock;
 /**
  * Endpoint is used as holder class that keeps state around the RPC endpoint.
  */
-public class EndpointStateMachine implements Closeable {
+public class EndpointStateMachine
+    implements Closeable, EndpointStateMachineMBean {
   static final Logger
       LOG = LoggerFactory.getLogger(EndpointStateMachine.class);
   private final StorageContainerDatanodeProtocolClientSideTranslatorPB endPoint;
@@ -45,6 +47,7 @@ public class EndpointStateMachine implements Closeable {
   private final Configuration conf;
   private EndPointStates state;
   private VersionResponse version;
+  private ZonedDateTime lastSuccessfulHeartbeat;
 
   /**
    * Constructs RPC Endpoints.
@@ -104,6 +107,15 @@ public class EndpointStateMachine implements Closeable {
     return state;
   }
 
+  @Override
+  public int getVersionNumber() {
+    if (version != null) {
+      return version.getProtobufMessage().getSoftwareVersion();
+    } else {
+      return -1;
+    }
+  }
+
   /**
    * Sets the endpoint state.
    *
@@ -144,6 +156,11 @@ public class EndpointStateMachine implements Closeable {
     return this.missedCount.get();
   }
 
+  @Override
+  public String getAddressString() {
+    return getAddress().toString();
+  }
+
   public void zeroMissedCount() {
     this.missedCount.set(0);
   }
@@ -262,4 +279,15 @@ public class EndpointStateMachine implements Closeable {
       return getLastState();
     }
   }
+
+  public long getLastSuccessfulHeartbeat() {
+    return lastSuccessfulHeartbeat == null ?
+        0 :
+        lastSuccessfulHeartbeat.toEpochSecond();
+  }
+
+  public void setLastSuccessfulHeartbeat(
+      ZonedDateTime lastSuccessfulHeartbeat) {
+    this.lastSuccessfulHeartbeat = lastSuccessfulHeartbeat;
+  }
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/EndpointStateMachineMBean.java

@@ -0,0 +1,34 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ozone.container.common.statemachine;
+
+
+/**
+ * JMX representation of an EndpointStateMachine.
+ */
+public interface EndpointStateMachineMBean {
+
+  long getMissedCount();
+
+  String getAddressString();
+
+  EndpointStateMachine.EndPointStates getState();
+
+  int getVersionNumber();
+
+  long getLastSuccessfulHeartbeat();
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/SCMConnectionManager.java

@@ -20,6 +20,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
+import org.apache.hadoop.metrics2.util.MBeans;
 import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.ozone.client.OzoneClientUtils;
 import org.apache.hadoop.ozone.protocolPB
@@ -29,12 +30,11 @@ import org.apache.hadoop.security.UserGroupInformation;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.management.ObjectName;
 import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
@@ -42,7 +42,8 @@ import java.util.concurrent.locks.ReentrantReadWriteLock;
  * SCMConnectionManager - Acts as a class that manages the membership
  * information of the SCMs that we are working with.
  */
-public class SCMConnectionManager implements Closeable{
+public class SCMConnectionManager
+    implements Closeable, SCMConnectionManagerMXBean {
   private static final Logger LOG =
       LoggerFactory.getLogger(SCMConnectionManager.class);
 
@@ -51,7 +52,7 @@ public class SCMConnectionManager implements Closeable{
 
   private final int rpcTimeout;
   private final Configuration conf;
-
+  private final ObjectName jmxBean;
 
   public SCMConnectionManager(Configuration conf) {
     this.mapLock = new ReentrantReadWriteLock();
@@ -59,8 +60,12 @@ public class SCMConnectionManager implements Closeable{
     this.rpcTimeout = timeOut.intValue();
     this.scmMachines = new HashMap<>();
     this.conf = conf;
+    jmxBean = MBeans.register("OzoneDataNode",
+        "SCMConnectionManager",
+        this);
   }
 
+
   /**
    * Returns Config.
    *
@@ -179,5 +184,18 @@ public class SCMConnectionManager implements Closeable{
   public void close() throws IOException {
     getValues().forEach(endpointStateMachine
         -> IOUtils.cleanupWithLogger(LOG, endpointStateMachine));
+    MBeans.unregister(jmxBean);
+  }
+
+  @Override
+  public List<EndpointStateMachineMBean> getSCMServers() {
+    readLock();
+    try {
+      return Collections
+          .unmodifiableList(new ArrayList<>(scmMachines.values()));
+
+    } finally {
+      readUnlock();
+    }
   }
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/statemachine/SCMConnectionManagerMXBean.java

@@ -0,0 +1,27 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ozone.container.common.statemachine;
+
+import java.util.List;
+
+/**
+ * JMX information about the connected SCM servers.
+ */
+public interface SCMConnectionManagerMXBean {
+
+  List<EndpointStateMachineMBean> getSCMServers();
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/states/endpoint/HeartbeatEndpointTask.java

@@ -40,6 +40,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.time.ZonedDateTime;
 import java.util.concurrent.Callable;
 
 /**
@@ -103,6 +104,7 @@ public class HeartbeatEndpointTask
           .sendHeartbeat(datanodeID, this.context.getNodeReport(),
               this.context.getContainerReportState());
       processResponse(reponse);
+      rpcEndpoint.setLastSuccessfulHeartbeat(ZonedDateTime.now());
       rpcEndpoint.zeroMissedCount();
     } catch (IOException ex) {
       rpcEndpoint.logIfNeeded(ex);

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

@@ -95,6 +95,52 @@
   {/dn.BPServiceActorInfo}
 </table>
 
+{#ozone.enabled}
+<div class="page-header"><h1>Ozone: SCM Connections</h1></div>
+<table class="table">
+  <thead>
+  <tr>
+    <th>SCM Address</th>
+    <th>Status</th>
+    <th>Version</th>
+    <th>Missed count</th>
+    <th>Last heartbeat</th>
+  </tr>
+  </thead>
+  {#ozone.SCMServers}
+  <tr>
+    <td>{addressString}</td>
+    <td>{state}</td>
+    <td>{versionNumber}</td>
+    <td>{missedCount}s</td>
+    <td>{lastSuccessfulHeartbeat|elapsed|fmt_time}</td>
+  </tr>
+  {/ozone.SCMServers}
+</table>
+
+<div class="page-header"><h1>Ozone: Storage locations</h1></div>
+<table class="table">
+  <thead>
+  <tr>
+    <th>ID</th>
+    <th>Capacity</th>
+    <th>Remaining</th>
+    <th>SCM used</th>
+    <th>failed</th>
+  </tr>
+  </thead>
+  {#ozone.LocationReport}
+  <tr>
+    <td>{id}</td>
+    <td>{capacity|fmt_bytes}</td>
+    <td>{remaining|fmt_bytes}</td>
+    <td>{scmUsed|fmt_bytes}</td>
+    <td>{failed}</td>
+  </tr>
+  {/ozone.LocationReport}
+</table>
+{/ozone.enabled}
+
 <div class="page-header"><h1>Volume Information</h1></div>
 <table class="table">
   <thead>

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/datanode/dn.js

@@ -18,11 +18,11 @@
 (function () {
   "use strict";
 
-  var data = {};
+  var data = {ozone: {enabled: false}};
 
   dust.loadSource(dust.compile($('#tmpl-dn').html(), 'dn'));
 
-  function load() {
+  function loadDatanodeInfo() {
     $.get('/jmx?qry=Hadoop:service=DataNode,name=DataNodeInfo', function(resp) {
       data.dn = workaround(resp.beans[0]);
       data.dn.HostName = resp.beans[0]['DatanodeHostname'];
@@ -30,6 +30,26 @@
     }).fail(show_err_msg);
   }
 
+  function loadOzoneScmInfo() {
+        $.get('/jmx?qry=Hadoop:service=OzoneDataNode,name=SCMConnectionManager', function (resp) {
+            if (resp.beans.length > 0) {
+                data.ozone.SCMServers = resp.beans[0].SCMServers;
+                data.ozone.enabled = true;
+                render();
+            }
+        }).fail(show_err_msg);
+  }
+
+  function loadOzoneStorageInfo() {
+        $.get('/jmx?qry=Hadoop:service=OzoneDataNode,name=ContainerLocationManager', function (resp) {
+            if (resp.beans.length > 0) {
+                data.ozone.LocationReport = resp.beans[0].LocationReport;
+                data.ozone.enabled = true;
+                render();
+            }
+        }).fail(show_err_msg);
+    }
+
   function workaround(dn) {
     function node_map_to_array(nodes) {
       var res = [];
@@ -65,6 +85,8 @@
     $('#alert-panel').show();
   }
 
-  load();
+    loadDatanodeInfo();
+    loadOzoneScmInfo();
+    loadOzoneStorageInfo();
 
 })();

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/static/dfs-dust.js

@@ -38,7 +38,10 @@
     'fmt_percentage': function (v) {
       return Math.round(v * 100) / 100 + '%';
     },
-
+    'elapsed': function(v) {
+      //elapsed sec from epoch sec
+      return Date.now() - v * 1000;
+    },
     'fmt_time': function (v) {
       var s = Math.floor(v / 1000), h = Math.floor(s / 3600);
       s -= h * 3600;