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From aengin...@apache.org
Subject hadoop git commit: HDFS-11424. Block Storage: add container representation to meta data. Contributed Chen Liang.
Date Tue, 07 Mar 2017 21:37:15 GMT
Repository: hadoop
Updated Branches:
  refs/heads/HDFS-7240 e37c5ed47 -> f0f4c3e7e


HDFS-11424. Block Storage: add container representation to meta data. Contributed Chen Liang.


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/f0f4c3e7
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/f0f4c3e7
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/f0f4c3e7

Branch: refs/heads/HDFS-7240
Commit: f0f4c3e7e349266e59beeced42405cc710f8633b
Parents: e37c5ed
Author: Anu Engineer <aengineer@apache.org>
Authored: Tue Mar 7 13:26:22 2017 -0800
Committer: Anu Engineer <aengineer@apache.org>
Committed: Tue Mar 7 13:26:22 2017 -0800

----------------------------------------------------------------------
 .../hadoop/scm/protocol/LocatedContainer.java   |  4 +-
 .../org/apache/hadoop/cblock/CBlockManager.java | 17 +++++---
 .../hadoop/cblock/meta/ContainerDescriptor.java | 19 +++++++--
 .../hadoop/cblock/meta/VolumeDescriptor.java    | 24 +++++++++++
 .../cblock/proto/MountVolumeResponse.java       | 16 +++++--
 ...entServerProtocolServerSideTranslatorPB.java | 12 +++++-
 .../hadoop/cblock/storage/IStorageClient.java   | 44 --------------------
 .../hadoop/cblock/storage/StorageManager.java   | 30 +++++++++----
 .../org/apache/hadoop/cblock/util/KeyUtil.java  |  5 +++
 .../main/proto/CBlockClientServerProtocol.proto |  4 ++
 .../apache/hadoop/cblock/TestCBlockServer.java  | 32 +++++++-------
 .../cblock/TestCBlockServerPersistence.java     | 41 ++++++++++++------
 .../cblock/util/ContainerLookUpService.java     | 26 ++++++++----
 .../hadoop/cblock/util/MockStorageClient.java   | 22 +++++-----
 14 files changed, 182 insertions(+), 114 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/protocol/LocatedContainer.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/protocol/LocatedContainer.java
b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/protocol/LocatedContainer.java
index 6e89d0c..469dab5 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/protocol/LocatedContainer.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/protocol/LocatedContainer.java
@@ -18,11 +18,11 @@
 
 package org.apache.hadoop.scm.protocol;
 
-import java.util.Set;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 
+import java.util.Set;
+
 /**
  * Holds the nodes that currently host the container for an object key hash.
  */

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/CBlockManager.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/CBlockManager.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/CBlockManager.java
index 5a260d3..5da5554 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/CBlockManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/CBlockManager.java
@@ -30,12 +30,13 @@ import org.apache.hadoop.cblock.protocolPB.CBlockClientServerProtocolPB;
 import org.apache.hadoop.cblock.protocolPB.CBlockClientServerProtocolServerSideTranslatorPB;
 import org.apache.hadoop.cblock.protocolPB.CBlockServiceProtocolPB;
 import org.apache.hadoop.cblock.protocolPB.CBlockServiceProtocolServerSideTranslatorPB;
-import org.apache.hadoop.cblock.storage.IStorageClient;
+import org.apache.hadoop.scm.client.ScmClient;
 import org.apache.hadoop.cblock.storage.StorageManager;
 import org.apache.hadoop.cblock.util.KeyUtil;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
 import org.apache.hadoop.net.NetUtils;
+import org.apache.hadoop.ozone.OzoneConfiguration;
 import org.apache.hadoop.utils.LevelDBStore;
 import org.iq80.leveldb.DBIterator;
 import org.slf4j.Logger;
@@ -88,9 +89,9 @@ public class CBlockManager implements CBlockServiceProtocol,
 
   private Charset encoding = Charset.forName("UTF-8");
 
-  public CBlockManager(CBlockConfiguration conf, IStorageClient storageClient
-  ) throws IOException {
-    storageManager = new StorageManager(storageClient);
+  public CBlockManager(OzoneConfiguration conf,
+      ScmClient storageClient) throws IOException {
+    storageManager = new StorageManager(storageClient, conf);
 
     dbPath = conf.getTrimmed(DFS_CBLOCK_SERVICE_LEVELDB_PATH_KEY,
         DFS_CBLOCK_SERVICE_LEVELDB_PATH_DEFAULT);
@@ -177,7 +178,7 @@ public class CBlockManager implements CBlockServiceProtocol,
    * @return RPC server, or null if addr is null
    * @throws IOException if there is an I/O error while creating RPC server
    */
-  private static RPC.Server startRpcServer(CBlockConfiguration conf,
+  private static RPC.Server startRpcServer(OzoneConfiguration conf,
       Class<?> protocol, BlockingService instance,
       InetSocketAddress addr, String bindHostKey,
       String handlerCountKey, int handlerCountDefault) throws IOException {
@@ -211,7 +212,7 @@ public class CBlockManager implements CBlockServiceProtocol,
   public synchronized void createVolume(String userName, String volumeName,
       long volumeSize, int blockSize) throws IOException {
     LOG.info("Create volume received: userName: {} volumeName: {} " +
-        "volumeSize: {} blockSize: {}", userName, volumeName,
+            "volumeSize: {} blockSize: {}", userName, volumeName,
         volumeSize, blockSize);
     // It is important to create in-memory representation of the
     // volume first, then writes to persistent storage (levelDB)
@@ -281,6 +282,10 @@ public class CBlockManager implements CBlockServiceProtocol,
     return storageManager.getAllVolume(null);
   }
 
+  public synchronized List<VolumeDescriptor> getAllVolumes(String userName) {
+    return storageManager.getAllVolume(userName);
+  }
+
   public synchronized void close() {
     try {
       levelDBStore.close();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/ContainerDescriptor.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/ContainerDescriptor.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/ContainerDescriptor.java
index f90da78..00064a6 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/ContainerDescriptor.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/ContainerDescriptor.java
@@ -19,6 +19,7 @@ package org.apache.hadoop.cblock.meta;
 
 import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.cblock.protocol.proto.CBlockClientServerProtocolProtos;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 /**
  *
@@ -35,6 +36,7 @@ public class ContainerDescriptor {
   // on creation, there may be no way to know the index of the container
   // as it is a volume specific information
   private int containerIndex;
+  private Pipeline pipeline;
 
   public ContainerDescriptor(String containerID) {
     this.containerID = containerID;
@@ -53,6 +55,14 @@ public class ContainerDescriptor {
     return containerID;
   }
 
+  public void setPipeline(Pipeline pipeline) {
+    this.pipeline = pipeline;
+  }
+
+  public Pipeline getPipeline() {
+    return pipeline;
+  }
+
   public int getContainerIndex() {
     return containerIndex;
   }
@@ -63,18 +73,21 @@ public class ContainerDescriptor {
 
   public CBlockClientServerProtocolProtos.ContainerIDProto toProtobuf() {
     CBlockClientServerProtocolProtos.ContainerIDProto.Builder builder =
-            CBlockClientServerProtocolProtos.ContainerIDProto.newBuilder();
+        CBlockClientServerProtocolProtos.ContainerIDProto.newBuilder();
     builder.setContainerID(containerID);
     builder.setIndex(containerIndex);
+    if (pipeline != null) {
+      builder.setPipeline(pipeline.getProtobufMessage());
+    }
     return builder.build();
   }
 
   public static ContainerDescriptor fromProtobuf(byte[] data)
       throws InvalidProtocolBufferException {
     CBlockClientServerProtocolProtos.ContainerIDProto id =
-            CBlockClientServerProtocolProtos.ContainerIDProto.parseFrom(data);
+        CBlockClientServerProtocolProtos.ContainerIDProto.parseFrom(data);
     return new ContainerDescriptor(id.getContainerID(),
-            (int)id.getIndex());
+        (int)id.getIndex());
   }
 
   @Override

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/VolumeDescriptor.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/VolumeDescriptor.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/VolumeDescriptor.java
index a09d34a..2cfc7ac 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/VolumeDescriptor.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/meta/VolumeDescriptor.java
@@ -19,6 +19,7 @@ package org.apache.hadoop.cblock.meta;
 
 import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.cblock.protocol.proto.CBlockClientServerProtocolProtos;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -126,6 +127,16 @@ public class VolumeDescriptor {
         containerDescriptor);
   }
 
+
+  public HashMap<String, Pipeline> getPipelines() {
+    HashMap<String, Pipeline> pipelines = new HashMap<>();
+    for (Map.Entry<String, ContainerDescriptor> entry :
+        containerMap.entrySet()) {
+      pipelines.put(entry.getKey(), entry.getValue().getPipeline());
+    }
+    return pipelines;
+  }
+
   public boolean isEmpty() {
     VolumeInfo info = getInfo();
     return info.getUsage() == 0;
@@ -154,6 +165,15 @@ public class VolumeDescriptor {
     return new ArrayList<>(containerIdOrdered);
   }
 
+  public List<Pipeline> getContainerPipelines() {
+    Map<String, Pipeline> tmp = getPipelines();
+    List<Pipeline> pipelineList = new LinkedList<>();
+    for (String containerIDString : containerIdOrdered) {
+      pipelineList.add(tmp.get(containerIDString));
+    }
+    return pipelineList;
+  }
+
   @Override
   public String toString() {
     String string = "";
@@ -204,6 +224,10 @@ public class VolumeDescriptor {
       ContainerDescriptor containerDescriptor = new ContainerDescriptor(
           containerProto.getContainerID(),
           (int)containerProto.getIndex());
+      if(containerProto.hasPipeline()) {
+        containerDescriptor.setPipeline(
+            Pipeline.getFromProtoBuf(containerProto.getPipeline()));
+      }
       volumeDescriptor.addContainer(containerDescriptor);
       containerOrdering[containerDescriptor.getContainerIndex()] =
           containerDescriptor.getContainerID();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/proto/MountVolumeResponse.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/proto/MountVolumeResponse.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/proto/MountVolumeResponse.java
index 3efc071..70ccd90 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/proto/MountVolumeResponse.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/proto/MountVolumeResponse.java
@@ -17,6 +17,9 @@
  */
 package org.apache.hadoop.cblock.proto;
 
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
+
+import java.util.HashMap;
 import java.util.List;
 
 /**
@@ -30,17 +33,20 @@ public class MountVolumeResponse {
   private final String volumeName;
   private final long volumeSize;
   private final int blockSize;
-  private List<String> containerList;
+  private List<Pipeline> containerList;
+  private HashMap<String, Pipeline> pipelineMap;
 
   public MountVolumeResponse(boolean isValid, String userName,
       String volumeName, long volumeSize, int blockSize,
-      List<String> containerList) {
+      List<Pipeline> containerList,
+      HashMap<String, Pipeline> pipelineMap) {
     this.isValid = isValid;
     this.userName = userName;
     this.volumeName = volumeName;
     this.volumeSize = volumeSize;
     this.blockSize = blockSize;
     this.containerList = containerList;
+    this.pipelineMap = pipelineMap;
   }
 
   public boolean getIsValid() {
@@ -63,7 +69,11 @@ public class MountVolumeResponse {
     return blockSize;
   }
 
-  public List<String> getContainerList() {
+  public List<Pipeline> getContainerList() {
     return containerList;
   }
+
+  public HashMap<String, Pipeline> getPipelineMap() {
+    return pipelineMap;
+  }
 }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/protocolPB/CBlockClientServerProtocolServerSideTranslatorPB.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/protocolPB/CBlockClientServerProtocolServerSideTranslatorPB.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/protocolPB/CBlockClientServerProtocolServerSideTranslatorPB.java
index 7295473..a28177f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/protocolPB/CBlockClientServerProtocolServerSideTranslatorPB.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/protocolPB/CBlockClientServerProtocolServerSideTranslatorPB.java
@@ -23,8 +23,10 @@ import org.apache.hadoop.cblock.proto.CBlockClientServerProtocol;
 import org.apache.hadoop.cblock.proto.MountVolumeResponse;
 import org.apache.hadoop.cblock.protocol.proto.CBlockClientServerProtocolProtos;
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 import java.io.IOException;
+import java.util.HashMap;
 import java.util.List;
 
 /**
@@ -61,12 +63,18 @@ public class CBlockClientServerProtocolServerSideTranslatorPB implements
         resp.setVolumeName(result.getVolumeName());
         resp.setVolumeSize(result.getVolumeSize());
         resp.setBlockSize(result.getBlockSize());
-        List<String> containers = result.getContainerList();
+        List<Pipeline> containers = result.getContainerList();
+        HashMap<String, Pipeline> pipelineMap = result.getPipelineMap();
+
         for (int i=0; i<containers.size(); i++) {
           CBlockClientServerProtocolProtos.ContainerIDProto.Builder id =
               CBlockClientServerProtocolProtos.ContainerIDProto.newBuilder();
-          id.setContainerID(containers.get(i));
+          String containerName = containers.get(i).getContainerName();
+          id.setContainerID(containerName);
           id.setIndex(i);
+          if (pipelineMap.containsKey(containerName)) {
+            id.setPipeline(pipelineMap.get(containerName).getProtobufMessage());
+          }
           resp.addAllContainerIDs(id.build());
         }
       }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/IStorageClient.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/IStorageClient.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/IStorageClient.java
deleted file mode 100644
index 1a58cbd..0000000
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/IStorageClient.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * 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.cblock.storage;
-
-import org.apache.hadoop.cblock.meta.ContainerDescriptor;
-import org.apache.hadoop.classification.InterfaceStability;
-
-import java.io.IOException;
-
-/**
- * The interface to call into underlying container layer.
- *
- * Written as interface to allow easy testing: implement a mock container layer
- * for standalone testing of CBlock API without actually calling into remote
- * containers. Actual container layer can simply re-implement this.
- *
- * NOTE this is temporarily needed class. When SCM containers are full-fledged,
- * this interface will likely be removed.
- */
-@InterfaceStability.Unstable
-public interface IStorageClient {
-  ContainerDescriptor createContainer() throws IOException;
-
-  void deleteContainer(String containerId) throws IOException;
-
-  ContainerDescriptor getContainer(String containerId) throws IOException;
-
-  long getContainerSize() throws IOException;
-}

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/StorageManager.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/StorageManager.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/StorageManager.java
index 044dd24..b9a5589 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/StorageManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/storage/StorageManager.java
@@ -23,6 +23,10 @@ import org.apache.hadoop.cblock.meta.ContainerDescriptor;
 import org.apache.hadoop.cblock.meta.VolumeDescriptor;
 import org.apache.hadoop.cblock.meta.VolumeInfo;
 import org.apache.hadoop.cblock.proto.MountVolumeResponse;
+import org.apache.hadoop.cblock.util.KeyUtil;
+import org.apache.hadoop.ozone.OzoneConfiguration;
+import org.apache.hadoop.scm.client.ScmClient;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -50,7 +54,7 @@ import java.util.concurrent.ConcurrentHashMap;
 public class StorageManager {
   private static final Logger LOGGER =
       LoggerFactory.getLogger(StorageManager.class);
-  private final IStorageClient storageClient;
+  private final ScmClient storageClient;
   /**
    * We will NOT have the situation where same kv pair getting
    * processed, but it is possible to have multiple kv pair being
@@ -68,10 +72,11 @@ public class StorageManager {
   // TODO : assuming all containers are of the same size
   private long containerSizeB;
 
-  public StorageManager(IStorageClient storageClient) throws IOException {
+  public StorageManager(ScmClient storageClient,
+      OzoneConfiguration ozoneConfig) throws IOException {
     this.storageClient = storageClient;
     this.user2VolumeMap = new ConcurrentHashMap<>();
-    this.containerSizeB = storageClient.getContainerSize();
+    this.containerSizeB = storageClient.getContainerSize(null);
   }
 
   /**
@@ -128,8 +133,10 @@ public class StorageManager {
 
     for (String containerId : containerIds) {
       try {
+        Pipeline pipeline = storageClient.getContainer(containerId);
         ContainerDescriptor containerDescriptor =
-            storageClient.getContainer(containerId);
+            new ContainerDescriptor(containerId);
+        containerDescriptor.setPipeline(pipeline);
         volumeDescriptor.addContainer(containerDescriptor);
       } catch (IOException e) {
         LOGGER.error("Getting container failed! Container:{} error:{}",
@@ -172,7 +179,11 @@ public class StorageManager {
       long allocatedSize = 0;
       ArrayList<String> containerIds = new ArrayList<>();
       while (allocatedSize < volumeSize) {
-        ContainerDescriptor container = storageClient.createContainer();
+        Pipeline pipeline = storageClient.createContainer(
+            KeyUtil.getContainerName(userName, volumeName, containerIdx));
+        ContainerDescriptor container =
+            new ContainerDescriptor(pipeline.getContainerName());
+        container.setPipeline(pipeline);
         container.setContainerIndex(containerIdx);
         volume.addContainer(container);
         containerIds.add(container.getContainerID());
@@ -203,7 +214,7 @@ public class StorageManager {
     if (!user2VolumeMap.containsKey(userName)
         || !user2VolumeMap.get(userName).containsKey(volumeName)) {
       throw new CBlockException("Deleting non-exist volume "
-        + userName + ":" + volumeName);
+          + userName + ":" + volumeName);
     }
     if (!force && !user2VolumeMap.get(userName).get(volumeName).isEmpty()) {
       throw new CBlockException("Deleting a non-empty volume without force!");
@@ -211,7 +222,8 @@ public class StorageManager {
     VolumeDescriptor volume = user2VolumeMap.get(userName).remove(volumeName);
     for (String containerID : volume.getContainerIDsList()) {
       try {
-        storageClient.deleteContainer(containerID);
+        Pipeline pipeline = storageClient.getContainer(containerID);
+        storageClient.deleteContainer(pipeline);
       } catch (IOException e) {
         LOGGER.error("Error deleting container Container:{} error:{}",
             containerID, e);
@@ -261,12 +273,12 @@ public class StorageManager {
         || !user2VolumeMap.get(userName).containsKey(volumeName)) {
       // in the case of invalid volume, no need to set any value other than
       // isValid flag.
-      return new MountVolumeResponse(false, null, null, 0, 0, null);
+      return new MountVolumeResponse(false, null, null, 0, 0, null, null);
     }
     VolumeDescriptor volume = user2VolumeMap.get(userName).get(volumeName);
     return new MountVolumeResponse(true, userName,
         volumeName, volume.getVolumeSize(), volume.getBlockSize(),
-        volume.getContainerIDsList());
+        volume.getContainerPipelines(), volume.getPipelines());
   }
 
   /**

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/util/KeyUtil.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/util/KeyUtil.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/util/KeyUtil.java
index f880181..421a187 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/util/KeyUtil.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/cblock/util/KeyUtil.java
@@ -26,6 +26,11 @@ public final class KeyUtil {
     return userName + ":" + volumeName;
   }
 
+  public static String getContainerName(String userName, String volumeName,
+      int containerID) {
+    return getVolumeKey(userName, volumeName) + "#" + containerID;
+  }
+
   private KeyUtil() {
 
   }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
b/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
index d19dd4b..1ec0d7f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
@@ -27,6 +27,8 @@ option java_generic_services = true;
 option java_generate_equals_and_hash = true;
 package hadoop.cblock;
 
+import "DatanodeContainerProtocol.proto";
+
 /**
 * This message is sent from CBlock client side to CBlock server to
 * mount a volume specified by owner name and volume name.
@@ -66,6 +68,8 @@ message MountVolumeResponseProto {
 message ContainerIDProto {
     required string containerID = 1;
     required uint64 index = 2;
+    // making pipeline optional to be compatible with exisiting tests
+    optional hadoop.hdfs.ozone.Pipeline pipeline = 3;
 }
 
 service CBlockClientServerProtocolService {

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServer.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServer.java
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServer.java
index dfaa3d2..ecc689b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServer.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServer.java
@@ -17,9 +17,11 @@
  */
 package org.apache.hadoop.cblock;
 
+import org.apache.commons.lang.RandomStringUtils;
 import org.apache.hadoop.cblock.meta.VolumeInfo;
-import org.apache.hadoop.cblock.storage.IStorageClient;
+import org.apache.hadoop.scm.client.ScmClient;
 import org.apache.hadoop.cblock.util.MockStorageClient;
+import org.apache.hadoop.ozone.OzoneConfiguration;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -36,12 +38,12 @@ import static org.junit.Assert.assertTrue;
  */
 public class TestCBlockServer {
   private static CBlockManager cBlockManager;
-  private static CBlockConfiguration conf;
+  private static OzoneConfiguration conf;
 
   @BeforeClass
   public static void setup() throws Exception {
-    IStorageClient storageClient = new MockStorageClient();
-    conf = new CBlockConfiguration();
+    ScmClient storageClient = new MockStorageClient();
+    conf = new OzoneConfiguration();
     cBlockManager = new CBlockManager(conf, storageClient);
   }
 
@@ -51,10 +53,10 @@ public class TestCBlockServer {
    */
   @Test
   public void testCreateVolume() throws Exception {
-    String userName1 = "testCreateUser1";
-    String userName2 = "testCreateUser2";
-    String volumeName1 = "testVolume1";
-    String volumeName2 = "testVolume2";
+    String userName1 = "user" + RandomStringUtils.randomNumeric(5);
+    String userName2 = "user" + RandomStringUtils.randomNumeric(5);
+    String volumeName1 = "volume" +  RandomStringUtils.randomNumeric(5);
+    String volumeName2 = "volume" +   RandomStringUtils.randomNumeric(5);
     long volumeSize = 1L*1024*1024;
     int blockSize = 4096;
     cBlockManager.createVolume(userName1, volumeName1, volumeSize, blockSize);
@@ -80,9 +82,9 @@ public class TestCBlockServer {
    */
   @Test
   public void testDeleteVolume() throws Exception {
-    String userName = "testDeleteUser";
-    String volumeName1 = "testVolume1";
-    String volumeName2 = "testVolume2";
+    String userName = "user" + RandomStringUtils.randomNumeric(5);
+    String volumeName1 = "volume" +  RandomStringUtils.randomNumeric(5);
+    String volumeName2 = "volume" +  RandomStringUtils.randomNumeric(5);
     long volumeSize = 1L*1024*1024;
     int blockSize = 4096;
     cBlockManager.createVolume(userName, volumeName1, volumeSize, blockSize);
@@ -106,8 +108,8 @@ public class TestCBlockServer {
    */
   @Test
   public void testInfoVolume() throws Exception {
-    String userName = "testInfoUser";
-    String volumeName = "testVolume";
+    String userName = "user" + RandomStringUtils.randomNumeric(5);
+    String volumeName = "volume" +  RandomStringUtils.randomNumeric(5);
     long volumeSize = 1L*1024*1024;
     int blockSize = 4096;
     cBlockManager.createVolume(userName, volumeName, volumeSize, blockSize);
@@ -124,8 +126,8 @@ public class TestCBlockServer {
    */
   @Test
   public void testListVolume() throws Exception {
-    String userName = "testListUser";
-    String volumeName = "testVolume";
+    String userName = "user" + RandomStringUtils.randomNumeric(5);
+    String volumeName ="volume" +  RandomStringUtils.randomNumeric(5);
     long volumeSize = 1L*1024*1024;
     int blockSize = 4096;
     int volumeNum = 100;

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServerPersistence.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServerPersistence.java
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServerPersistence.java
index 15e5be9..3e212d5 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServerPersistence.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/TestCBlockServerPersistence.java
@@ -18,10 +18,15 @@
 package org.apache.hadoop.cblock;
 
 import org.apache.hadoop.cblock.meta.VolumeDescriptor;
-import org.apache.hadoop.cblock.storage.IStorageClient;
+import org.apache.hadoop.scm.client.ScmClient;
 import org.apache.hadoop.cblock.util.MockStorageClient;
+import org.apache.hadoop.ozone.OzoneConfiguration;
+import org.apache.hadoop.ozone.container.ozoneimpl.TestOzoneContainer;
 import org.junit.Test;
 
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
 import java.util.List;
 
 import static org.apache.hadoop.cblock.CBlockConfigKeys.DFS_CBLOCK_SERVICE_LEVELDB_PATH_KEY;
@@ -40,6 +45,7 @@ public class TestCBlockServerPersistence {
    */
   @Test
   public void testWriteToPersistentStore() throws Exception {
+    OzoneConfiguration conf = new OzoneConfiguration();
     String userName = "testWriteToPersistentStore";
     String volumeName1 = "testVolume1";
     String volumeName2 = "testVolume2";
@@ -48,11 +54,17 @@ public class TestCBlockServerPersistence {
     int blockSize = 4096;
     CBlockManager cBlockManager = null;
     CBlockManager cBlockManager1 = null;
-    String dbPath = "/tmp/testCblockPersistence.dat";
+    URL p = conf.getClass().getResource("");
+    String path = p.getPath().concat(
+        TestOzoneContainer.class.getSimpleName());
+    File filePath = new File(path);
+    if(!filePath.exists() && !filePath.mkdirs()) {
+      throw new IOException("Unable to create test DB dir");
+    }
+    conf.set(DFS_CBLOCK_SERVICE_LEVELDB_PATH_KEY, path.concat(
+        "/testCblockPersistence.dat"));
     try {
-      IStorageClient storageClient = new MockStorageClient();
-      CBlockConfiguration conf = new CBlockConfiguration();
-      conf.set(DFS_CBLOCK_SERVICE_LEVELDB_PATH_KEY, dbPath);
+      ScmClient storageClient = new MockStorageClient();
       cBlockManager = new CBlockManager(conf, storageClient);
       cBlockManager.createVolume(userName, volumeName1, volumeSize1, blockSize);
       cBlockManager.createVolume(userName, volumeName2, volumeSize2, blockSize);
@@ -69,9 +81,10 @@ public class TestCBlockServerPersistence {
 
       // create a new cblock server instance. This is just the
       // same as restarting cblock server.
-      IStorageClient storageClient1 = new MockStorageClient();
-      CBlockConfiguration conf1 = new CBlockConfiguration();
-      conf1.set(DFS_CBLOCK_SERVICE_LEVELDB_PATH_KEY, dbPath);
+      ScmClient storageClient1 = new MockStorageClient();
+      OzoneConfiguration conf1 = new OzoneConfiguration();
+      conf1.set(DFS_CBLOCK_SERVICE_LEVELDB_PATH_KEY, path.concat(
+          "/testCblockPersistence.dat"));
       cBlockManager1 = new CBlockManager(conf1, storageClient1);
       List<VolumeDescriptor> allVolumes1 = cBlockManager1.getAllVolumes();
       assertEquals(2, allVolumes1.size());
@@ -85,11 +98,15 @@ public class TestCBlockServerPersistence {
       // here.
       if (volumeDescriptor1.getVolumeName().equals(
           newvolumeDescriptor1.getVolumeName())) {
-        assertEquals(volumeDescriptor1, newvolumeDescriptor1);
-        assertEquals(volumeDescriptor2, newvolumeDescriptor2);
+        assertEquals(volumeDescriptor1.toString(),
+            newvolumeDescriptor1.toString());
+        assertEquals(volumeDescriptor2.toString(),
+            newvolumeDescriptor2.toString());
       } else {
-        assertEquals(volumeDescriptor1, newvolumeDescriptor2);
-        assertEquals(volumeDescriptor2, newvolumeDescriptor1);
+        assertEquals(volumeDescriptor1.toString(),
+            newvolumeDescriptor2.toString());
+        assertEquals(volumeDescriptor2.toString(),
+            newvolumeDescriptor1.toString());
       }
     } finally {
       if (cBlockManager != null) {

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/ContainerLookUpService.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/ContainerLookUpService.java
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/ContainerLookUpService.java
index 1245e62..8d9c2a0 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/ContainerLookUpService.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/ContainerLookUpService.java
@@ -18,7 +18,10 @@
 package org.apache.hadoop.cblock.util;
 
 import org.apache.hadoop.cblock.meta.ContainerDescriptor;
+import org.apache.hadoop.ozone.container.ContainerTestHelper;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
+import java.io.IOException;
 import java.util.HashMap;
 
 /**
@@ -42,22 +45,29 @@ public final class ContainerLookUpService {
    *
    * found
    * @param containerID
-   * @return
+   * @return the corresponding pipeline instance (create if not exist)
    */
-  public static ContainerDescriptor lookUp(String containerID) {
+  public static ContainerDescriptor lookUp(String containerID)
+      throws IOException {
     if (!containers.containsKey(containerID)) {
-      System.err.println("A container id never seen, return a new one " +
-          "for testing purpose:" + containerID);
-      containers.put(containerID, new ContainerDescriptor(containerID));
+      Pipeline pipeline = ContainerTestHelper.createSingleNodePipeline(
+          containerID);
+      ContainerDescriptor cd = new ContainerDescriptor(containerID);
+      cd.setPipeline(pipeline);
+      containers.put(containerID, cd);
     }
     return containers.get(containerID);
   }
 
-  public static void addContainer(String containerID) {
-    containers.put(containerID, new ContainerDescriptor(containerID));
+  public static void addContainer(String containerID) throws IOException {
+    Pipeline pipeline = ContainerTestHelper.createSingleNodePipeline(
+        containerID);
+    ContainerDescriptor cd = new ContainerDescriptor(containerID);
+    cd.setPipeline(pipeline);
+    containers.put(containerID, cd);
   }
 
   private ContainerLookUpService() {
 
   }
-}
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/hadoop/blob/f0f4c3e7/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/MockStorageClient.java
----------------------------------------------------------------------
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/MockStorageClient.java
b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/MockStorageClient.java
index 0fce6a1..8afbc57 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/MockStorageClient.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/cblock/util/MockStorageClient.java
@@ -17,8 +17,8 @@
  */
 package org.apache.hadoop.cblock.util;
 
-import org.apache.hadoop.cblock.meta.ContainerDescriptor;
-import org.apache.hadoop.cblock.storage.IStorageClient;
+import org.apache.hadoop.scm.client.ScmClient;
+import org.apache.hadoop.scm.container.common.helpers.Pipeline;
 
 import java.io.IOException;
 
@@ -30,7 +30,7 @@ import java.io.IOException;
  * replaced with actual container look up calls.
  *
  */
-public class MockStorageClient implements IStorageClient {
+public class MockStorageClient implements ScmClient {
   private static long currentContainerId = -1;
 
   /**
@@ -39,20 +39,22 @@ public class MockStorageClient implements IStorageClient {
    * @return A container descriptor object to locate this container
    * @throws Exception
    */
-  public ContainerDescriptor createContainer() throws IOException {
+  @Override
+  public Pipeline createContainer(String containerId)
+      throws IOException {
     currentContainerId += 1;
     ContainerLookUpService.addContainer(Long.toString(currentContainerId));
-    return ContainerLookUpService.lookUp(Long.toString(currentContainerId));
+    return ContainerLookUpService.lookUp(Long.toString(currentContainerId))
+        .getPipeline();
   }
 
   /**
    * As this is only a testing class, with all "container" maintained in
    * memory, no need to really delete anything for now.
-   * @param containerId
    * @throws IOException
    */
   @Override
-  public void deleteContainer(String containerId) throws IOException {
+  public void deleteContainer(Pipeline pipeline) throws IOException {
 
   }
 
@@ -63,13 +65,13 @@ public class MockStorageClient implements IStorageClient {
    * @return
    * @throws IOException
    */
-  public ContainerDescriptor getContainer(String containerId)
+  public Pipeline getContainer(String containerId)
       throws IOException {
-    return ContainerLookUpService.lookUp(containerId);
+    return ContainerLookUpService.lookUp(containerId).getPipeline();
   }
 
   @Override
-  public long getContainerSize() throws IOException {
+  public long getContainerSize(Pipeline pipeline) throws IOException {
     // just return a constant value for now
     return 5L*1024*1024*1024; // 5GB
   }


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