HDDS-1488. Scm cli command to start/stop replication manager.

Signed-off-by: Anu Engineer <aengineer@apache.org>

hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/client/ContainerOperationClient.java

@@ -459,4 +459,21 @@ public boolean inSafeMode() throws IOException {
   public boolean forceExitSafeMode() throws IOException {
     return storageContainerLocationClient.forceExitSafeMode();
   }
+
+  @Override
+  public void startReplicationManager() throws IOException {
+    storageContainerLocationClient.startReplicationManager();
+  }
+
+  @Override
+  public void stopReplicationManager() throws IOException {
+    storageContainerLocationClient.stopReplicationManager();
+  }
+
+  @Override
+  public boolean getReplicationManagerStatus() throws IOException {
+    return storageContainerLocationClient.getReplicationManagerStatus();
+  }
+
+
 }

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/client/ScmClient.java

@@ -203,4 +203,23 @@ Pipeline createReplicationPipeline(HddsProtos.ReplicationType type,
    * @throws IOException
    */
   boolean forceExitSafeMode() throws IOException;
+
+  /**
+   * Start ReplicationManager.
+   */
+  void startReplicationManager() throws IOException;
+
+  /**
+   * Stop ReplicationManager.
+   */
+  void stopReplicationManager() throws IOException;
+
+  /**
+   * Returns ReplicationManager status.
+   *
+   * @return True if ReplicationManager is running, false otherwise.
+   */
+  boolean getReplicationManagerStatus() throws IOException;
+
+
 }

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/protocol/StorageContainerLocationProtocol.java

@@ -177,4 +177,22 @@ Pipeline createReplicationPipeline(HddsProtos.ReplicationType type,
    * @throws IOException
    */
   boolean forceExitSafeMode() throws IOException;
+
+  /**
+   * Start ReplicationManager.
+   */
+  void startReplicationManager() throws IOException;
+
+  /**
+   * Stop ReplicationManager.
+   */
+  void stopReplicationManager() throws IOException;
+
+  /**
+   * Returns ReplicationManager status.
+   *
+   * @return True if ReplicationManager is running, false otherwise.
+   */
+  boolean getReplicationManagerStatus() throws IOException;
+
 }

hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/scm/protocolPB/StorageContainerLocationProtocolClientSideTranslatorPB.java

@@ -29,6 +29,10 @@
 import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.GetContainerWithPipelineResponseProto;
 import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.InSafeModeRequestProto;
 import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.InSafeModeResponseProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.StartReplicationManagerRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.StopReplicationManagerRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.ReplicationManagerStatusRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.ReplicationManagerStatusResponseProto;
 import org.apache.hadoop.hdds.scm.ScmInfo;
 import org.apache.hadoop.hdds.scm.container.common.helpers.ContainerWithPipeline;
 import org.apache.hadoop.hdds.scm.container.ContainerInfo;
@@ -407,6 +411,41 @@ public boolean forceExitSafeMode() throws IOException {
     }
   }
 
+  @Override
+  public void startReplicationManager() throws IOException {
+    try {
+      StartReplicationManagerRequestProto request =
+          StartReplicationManagerRequestProto.getDefaultInstance();
+      rpcProxy.startReplicationManager(NULL_RPC_CONTROLLER, request);
+    } catch (ServiceException e) {
+      throw ProtobufHelper.getRemoteException(e);
+    }
+  }
+
+  @Override
+  public void stopReplicationManager() throws IOException {
+    try {
+      StopReplicationManagerRequestProto request =
+          StopReplicationManagerRequestProto.getDefaultInstance();
+      rpcProxy.stopReplicationManager(NULL_RPC_CONTROLLER, request);
+    } catch (ServiceException e) {
+      throw ProtobufHelper.getRemoteException(e);
+    }
+  }
+
+  @Override
+  public boolean getReplicationManagerStatus() throws IOException {
+    try {
+      ReplicationManagerStatusRequestProto request =
+          ReplicationManagerStatusRequestProto.getDefaultInstance();
+      ReplicationManagerStatusResponseProto response =
+          rpcProxy.getReplicationManagerStatus(NULL_RPC_CONTROLLER, request);
+      return response.getIsRunning();
+    } catch (ServiceException e) {
+      throw ProtobufHelper.getRemoteException(e);
+    }
+  }
+
   @Override
   public Object getUnderlyingProxyObject() {
     return rpcProxy;

hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/audit/SCMAction.java

@@ -36,7 +36,10 @@ public enum SCMAction implements AuditAction {
   DELETE_CONTAINER,
   IN_SAFE_MODE,
   FORCE_EXIT_SAFE_MODE,
-  SORT_DATANODE;
+  SORT_DATANODE,
+  START_REPLICATION_MANAGER,
+  STOP_REPLICATION_MANAGER,
+  GET_REPLICATION_MANAGER_STATUS;
 
   @Override
   public String getAction() {

hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/protocolPB/StorageContainerLocationProtocolServerSideTranslatorPB.java

@@ -33,6 +33,12 @@
     .StorageContainerLocationProtocolProtos.ForceExitSafeModeResponseProto;
 import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.GetContainerWithPipelineRequestProto;
 import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.GetContainerWithPipelineResponseProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.StartReplicationManagerRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.StartReplicationManagerResponseProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.StopReplicationManagerRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.StopReplicationManagerResponseProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.ReplicationManagerStatusRequestProto;
+import org.apache.hadoop.hdds.protocol.proto.StorageContainerLocationProtocolProtos.ReplicationManagerStatusResponseProto;
 import org.apache.hadoop.hdds.scm.ScmInfo;
 import org.apache.hadoop.hdds.scm.container.common.helpers.ContainerWithPipeline;
 import org.apache.hadoop.hdds.scm.container.ContainerInfo;
@@ -306,4 +312,44 @@ public ForceExitSafeModeResponseProto forceExitSafeMode(
       throw new ServiceException(ex);
     }
   }
+
+  @Override
+  public StartReplicationManagerResponseProto startReplicationManager(
+      RpcController controller, StartReplicationManagerRequestProto request)
+      throws ServiceException {
+    try (Scope ignored = TracingUtil.importAndCreateScope(
+        "startReplicationManager", request.getTraceID())) {
+      impl.startReplicationManager();
+      return StartReplicationManagerResponseProto.newBuilder().build();
+    } catch (IOException ex) {
+      throw new ServiceException(ex);
+    }
+  }
+
+  @Override
+  public StopReplicationManagerResponseProto stopReplicationManager(
+      RpcController controller, StopReplicationManagerRequestProto request)
+      throws ServiceException {
+    try (Scope ignored = TracingUtil.importAndCreateScope(
+        "stopReplicationManager", request.getTraceID())) {
+      impl.stopReplicationManager();
+      return StopReplicationManagerResponseProto.newBuilder().build();
+    } catch (IOException ex) {
+      throw new ServiceException(ex);
+    }
+  }
+
+  @Override
+  public ReplicationManagerStatusResponseProto getReplicationManagerStatus(
+      RpcController controller, ReplicationManagerStatusRequestProto request)
+      throws ServiceException {
+    try (Scope ignored = TracingUtil.importAndCreateScope(
+        "getReplicationManagerStatus", request.getTraceID())) {
+      return ReplicationManagerStatusResponseProto.newBuilder()
+          .setIsRunning(impl.getReplicationManagerStatus()).build();
+    } catch (IOException ex) {
+      throw new ServiceException(ex);
+    }
+  }
+
 }

hadoop-hdds/common/src/main/proto/StorageContainerLocationProtocol.proto

@@ -192,6 +192,28 @@ message ForceExitSafeModeResponseProto {
   required bool exitedSafeMode = 1;
 }
 
+message StartReplicationManagerRequestProto {
+  optional string traceID = 1;
+}
+
+message StartReplicationManagerResponseProto {
+}
+
+message StopReplicationManagerRequestProto {
+  optional string traceID = 1;
+}
+
+message StopReplicationManagerResponseProto {
+}
+
+message ReplicationManagerStatusRequestProto {
+  optional string traceID = 1;
+}
+
+message ReplicationManagerStatusResponseProto {
+  required bool isRunning = 1;
+}
+
 /**
  * Protocol used from an HDFS node to StorageContainerManager.  See the request
  * and response messages for details of the RPC calls.
@@ -275,4 +297,13 @@ service StorageContainerLocationProtocolService {
   */
   rpc forceExitSafeMode(ForceExitSafeModeRequestProto)
   returns (ForceExitSafeModeResponseProto);
+
+  rpc startReplicationManager(StartReplicationManagerRequestProto)
+  returns (StartReplicationManagerResponseProto);
+
+  rpc stopReplicationManager(StopReplicationManagerRequestProto)
+  returns (StopReplicationManagerResponseProto);
+
+  rpc getReplicationManagerStatus(ReplicationManagerStatusRequestProto)
+  returns (ReplicationManagerStatusResponseProto);
 }

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/ReplicationManager.java

@@ -104,17 +104,17 @@ public class ReplicationManager {
    */
   private final Map<ContainerID, List<InflightAction>> inflightDeletion;
 
-  /**
-   * ReplicationMonitor thread is the one which wakes up at configured
-   * interval and processes all the containers.
-   */
-  private final Thread replicationMonitor;
-
   /**
    * ReplicationManager specific configuration.
    */
   private final ReplicationManagerConfiguration conf;
 
+  /**
+   * ReplicationMonitor thread is the one which wakes up at configured
+   * interval and processes all the containers.
+   */
+  private Thread replicationMonitor;
+
   /**
    * Flag used for checking if the ReplicationMonitor thread is running or
    * not.
@@ -132,28 +132,28 @@ public class ReplicationManager {
   public ReplicationManager(final ReplicationManagerConfiguration conf,
                             final ContainerManager containerManager,
                             final ContainerPlacementPolicy containerPlacement,
-      final EventPublisher eventPublisher,
-      final LockManager lockManager) {
+                            final EventPublisher eventPublisher,
+                            final LockManager<ContainerID> lockManager) {
     this.containerManager = containerManager;
     this.containerPlacement = containerPlacement;
     this.eventPublisher = eventPublisher;
     this.lockManager = lockManager;
-    this.inflightReplication = new HashMap<>();
-    this.inflightDeletion = new HashMap<>();
-    this.replicationMonitor = new Thread(this::run);
-    this.replicationMonitor.setName("ReplicationMonitor");
-    this.replicationMonitor.setDaemon(true);
     this.conf = conf;
     this.running = false;
+    this.inflightReplication = new HashMap<>();
+    this.inflightDeletion = new HashMap<>();
   }
 
   /**
    * Starts Replication Monitor thread.
    */
   public synchronized void start() {
-    if (!running) {
+    if (!isRunning()) {
       LOG.info("Starting Replication Monitor Thread.");
       running = true;
+      replicationMonitor = new Thread(this::run);
+      replicationMonitor.setName("ReplicationMonitor");
+      replicationMonitor.setDaemon(true);
       replicationMonitor.start();
     } else {
       LOG.info("Replication Monitor Thread is already running.");
@@ -166,7 +166,13 @@ public synchronized void start() {
    * @return true if running, false otherwise
    */
   public boolean isRunning() {
-    return replicationMonitor.isAlive();
+    if (!running) {
+      synchronized (this) {
+        return replicationMonitor != null
+            && replicationMonitor.isAlive();
+      }
+    }
+    return true;
   }
 
   /**
@@ -185,6 +191,8 @@ synchronized void processContainersNow() {
   public synchronized void stop() {
     if (running) {
       LOG.info("Stopping Replication Monitor Thread.");
+      inflightReplication.clear();
+      inflightDeletion.clear();
       running = false;
       notify();
     } else {

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/server/SCMClientProtocolServer.java

@@ -469,6 +469,27 @@ public boolean forceExitSafeMode() throws IOException {
     return scm.exitSafeMode();
   }
 
+  @Override
+  public void startReplicationManager() {
+    AUDIT.logWriteSuccess(buildAuditMessageForSuccess(
+        SCMAction.START_REPLICATION_MANAGER, null));
+    scm.getReplicationManager().start();
+  }
+
+  @Override
+  public void stopReplicationManager() {
+    AUDIT.logWriteSuccess(buildAuditMessageForSuccess(
+        SCMAction.STOP_REPLICATION_MANAGER, null));
+    scm.getReplicationManager().stop();
+  }
+
+  @Override
+  public boolean getReplicationManagerStatus() {
+    AUDIT.logWriteSuccess(buildAuditMessageForSuccess(
+        SCMAction.GET_REPLICATION_MANAGER_STATUS, null));
+    return scm.getReplicationManager().isRunning();
+  }
+
   /**
    * Queries a list of Node that match a set of statuses.
    *

hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/container/TestReplicationManager.java

@@ -116,6 +116,22 @@ public void setup() throws IOException, InterruptedException {
     Thread.sleep(100L);
   }
 
+
+  /**
+   * Checks if restarting of replication manager works.
+   */
+  @Test
+  public void testReplicationManagerRestart() throws InterruptedException {
+    Assert.assertTrue(replicationManager.isRunning());
+    replicationManager.stop();
+    // Stop is a non-blocking call, it might take sometime for the
+    // ReplicationManager to shutdown
+    Thread.sleep(500);
+    Assert.assertFalse(replicationManager.isRunning());
+    replicationManager.start();
+    Assert.assertTrue(replicationManager.isRunning());
+  }
+
   /**
    * Open containers are not handled by ReplicationManager.
    * This test-case makes sure that ReplicationManages doesn't take

hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/ReplicationManagerCommands.java

@@ -0,0 +1,54 @@
+/**
+ * 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.hdds.scm.cli;
+
+import org.apache.hadoop.hdds.cli.HddsVersionProvider;
+import org.apache.hadoop.hdds.cli.MissingSubcommandException;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.ParentCommand;
+
+import java.util.concurrent.Callable;
+
+/**
+ * Subcommand to group replication manager related operations.
+ */
+@Command(
+    name = "replicationmanager",
+    description = "ReplicationManager specific operations",
+    mixinStandardHelpOptions = true,
+    versionProvider = HddsVersionProvider.class,
+    subcommands = {
+        ReplicationManagerStartSubcommand.class,
+        ReplicationManagerStopSubcommand.class,
+        ReplicationManagerStatusSubcommand.class
+    })
+public class ReplicationManagerCommands implements Callable<Void> {
+
+  @ParentCommand
+  private SCMCLI parent;
+
+  public SCMCLI getParent() {
+    return parent;
+  }
+
+  @Override
+  public Void call() throws Exception {
+    throw new MissingSubcommandException(
+        this.parent.getCmd().getSubcommands().get("replicationmanager"));
+  }
+}

hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/ReplicationManagerStartSubcommand.java

@@ -0,0 +1,53 @@
+/**
+ * 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.hdds.scm.cli;
+
+import org.apache.hadoop.hdds.cli.HddsVersionProvider;
+import org.apache.hadoop.hdds.scm.client.ScmClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.ParentCommand;
+
+import java.util.concurrent.Callable;
+
+/**
+ * This is the handler that process safe mode check command.
+ */
+@Command(
+    name = "start",
+    description = "Start ReplicationManager",
+    mixinStandardHelpOptions = true,
+    versionProvider = HddsVersionProvider.class)
+public class ReplicationManagerStartSubcommand implements Callable<Void> {
+
+  private static final Logger LOG =
+      LoggerFactory.getLogger(ReplicationManagerStartSubcommand.class);
+
+  @ParentCommand
+  private ReplicationManagerCommands parent;
+
+  @Override
+  public Void call() throws Exception {
+    try (ScmClient scmClient = parent.getParent().createScmClient()) {
+      scmClient.startReplicationManager();
+      LOG.info("Starting ReplicationManager...");
+      return null;
+    }
+  }
+}

hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/ReplicationManagerStatusSubcommand.java

@@ -0,0 +1,60 @@
+/**
+ * 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.hdds.scm.cli;
+
+import org.apache.hadoop.hdds.cli.HddsVersionProvider;
+import org.apache.hadoop.hdds.scm.client.ScmClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.ParentCommand;
+
+import java.util.concurrent.Callable;
+
+/**
+ * This is the handler that process safe mode check command.
+ */
+@Command(
+    name = "status",
+    description = "Check if ReplicationManager is running or not",
+    mixinStandardHelpOptions = true,
+    versionProvider = HddsVersionProvider.class)
+public class ReplicationManagerStatusSubcommand implements Callable<Void> {
+
+  private static final Logger LOG =
+      LoggerFactory.getLogger(ReplicationManagerStatusSubcommand.class);
+
+  @ParentCommand
+  private ReplicationManagerCommands parent;
+
+  @Override
+  public Void call() throws Exception {
+    try (ScmClient scmClient = parent.getParent().createScmClient()) {
+
+      boolean execReturn = scmClient.getReplicationManagerStatus();
+
+      // Output data list
+      if(execReturn){
+        LOG.info("ReplicationManager is Running.");
+      } else {
+        LOG.info("ReplicationManager is Not Running.");
+      }
+      return null;
+    }
+  }
+}

hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/ReplicationManagerStopSubcommand.java

@@ -0,0 +1,55 @@
+/**
+ * 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.hdds.scm.cli;
+
+import org.apache.hadoop.hdds.cli.HddsVersionProvider;
+import org.apache.hadoop.hdds.scm.client.ScmClient;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.ParentCommand;
+
+import java.util.concurrent.Callable;
+
+/**
+ * This is the handler that process safe mode check command.
+ */
+@Command(
+    name = "stop",
+    description = "Stop ReplicationManager",
+    mixinStandardHelpOptions = true,
+    versionProvider = HddsVersionProvider.class)
+public class ReplicationManagerStopSubcommand implements Callable<Void> {
+
+  private static final Logger LOG =
+      LoggerFactory.getLogger(ReplicationManagerStopSubcommand.class);
+
+  @ParentCommand
+  private ReplicationManagerCommands parent;
+
+  @Override
+  public Void call() throws Exception {
+    try (ScmClient scmClient = parent.getParent().createScmClient()) {
+      scmClient.stopReplicationManager();
+      LOG.info("Stopping ReplicationManager...");
+      LOG.info("Requested SCM to stop ReplicationManager, " +
+          "it might take sometime for the ReplicationManager to stop.");
+      return null;
+    }
+  }
+}

hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/SCMCLI.java

@@ -85,7 +85,8 @@
         CloseSubcommand.class,
         ListPipelinesSubcommand.class,
         ClosePipelineSubcommand.class,
-        TopologySubcommand.class
+        TopologySubcommand.class,
+        ReplicationManagerCommands.class
     },
     mixinStandardHelpOptions = true)
 public class SCMCLI extends GenericCli {