| /** |
| * 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.hdfs; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.nio.channels.FileChannel; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Random; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.protocol.BlockListAsLongs; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols; |
| import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol; |
| import org.apache.hadoop.hdfs.protocol.ClientProtocol; |
| import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol; |
| import org.apache.hadoop.security.RefreshUserToGroupMappingsProtocol; |
| import org.apache.hadoop.security.authorize.RefreshAuthorizationPolicyProtocol; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| import static org.apache.hadoop.hdfs.server.common.Util.fileAsURI; |
| import org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode; |
| import org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface; |
| import org.apache.hadoop.hdfs.server.datanode.SimulatedFSDataset; |
| import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter; |
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
| import org.apache.hadoop.hdfs.server.namenode.NameNode; |
| import org.apache.hadoop.hdfs.tools.DFSAdmin; |
| import org.apache.hadoop.net.DNSToSwitchMapping; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.net.StaticMapping; |
| import org.apache.hadoop.util.StringUtils; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| /** |
| * This class creates a single-process DFS cluster for junit testing. |
| * The data directories for non-simulated DFS are under the testing directory. |
| * For simulated data nodes, no underlying fs storage is used. |
| */ |
| public class MiniDFSCluster { |
| |
| public class DataNodeProperties { |
| DataNode datanode; |
| Configuration conf; |
| String[] dnArgs; |
| |
| DataNodeProperties(DataNode node, Configuration conf, String[] args) { |
| this.datanode = node; |
| this.conf = conf; |
| this.dnArgs = args; |
| } |
| } |
| private static final Log LOG = LogFactory.getLog(MiniDFSCluster.class); |
| |
| private URI myUri = null; |
| private Configuration conf; |
| private NameNode nameNode; |
| private int numDataNodes; |
| private ArrayList<DataNodeProperties> dataNodes = |
| new ArrayList<DataNodeProperties>(); |
| private File base_dir; |
| private File data_dir; |
| |
| public final static String FINALIZED_DIR_NAME = "/current/finalized/"; |
| |
| |
| /** |
| * This null constructor is used only when wishing to start a data node cluster |
| * without a name node (ie when the name node is started elsewhere). |
| */ |
| public MiniDFSCluster() { |
| } |
| |
| /** |
| * Modify the config and start up the servers with the given operation. |
| * Servers will be started on free ports. |
| * <p> |
| * The caller must manage the creation of NameNode and DataNode directories |
| * and have already set dfs.name.dir and dfs.data.dir in the given conf. |
| * |
| * @param conf the base configuration to use in starting the servers. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param nameNodeOperation the operation with which to start the servers. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| */ |
| public MiniDFSCluster(Configuration conf, |
| int numDataNodes, |
| StartupOption nameNodeOperation) throws IOException { |
| this(0, conf, numDataNodes, false, false, false, nameNodeOperation, |
| null, null, null); |
| } |
| |
| /** |
| * Modify the config and start up the servers. The rpc and info ports for |
| * servers are guaranteed to use free ports. |
| * <p> |
| * NameNode and DataNode directory creation and configuration will be |
| * managed by this class. |
| * |
| * @param conf the base configuration to use in starting the servers. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param format if true, format the NameNode and DataNodes before starting up |
| * @param racks array of strings indicating the rack that each DataNode is on |
| */ |
| public MiniDFSCluster(Configuration conf, |
| int numDataNodes, |
| boolean format, |
| String[] racks) throws IOException { |
| this(0, conf, numDataNodes, format, true, true, null, racks, null, null); |
| } |
| |
| /** |
| * Modify the config and start up the servers. The rpc and info ports for |
| * servers are guaranteed to use free ports. |
| * <p> |
| * NameNode and DataNode directory creation and configuration will be |
| * managed by this class. |
| * |
| * @param conf the base configuration to use in starting the servers. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param format if true, format the NameNode and DataNodes before starting up |
| * @param racks array of strings indicating the rack that each DataNode is on |
| * @param hosts array of strings indicating the hostname for each DataNode |
| */ |
| public MiniDFSCluster(Configuration conf, |
| int numDataNodes, |
| boolean format, |
| String[] racks, String[] hosts) throws IOException { |
| this(0, conf, numDataNodes, format, true, true, null, racks, hosts, null); |
| } |
| |
| /** |
| * NOTE: if possible, the other constructors that don't have nameNode port |
| * parameter should be used as they will ensure that the servers use free ports. |
| * <p> |
| * Modify the config and start up the servers. |
| * |
| * @param nameNodePort suggestion for which rpc port to use. caller should |
| * use getNameNodePort() to get the actual port used. |
| * @param conf the base configuration to use in starting the servers. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param format if true, format the NameNode and DataNodes before starting up |
| * @param manageDfsDirs if true, the data directories for servers will be |
| * created and dfs.name.dir and dfs.data.dir will be set in the conf |
| * @param operation the operation with which to start the servers. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| * @param racks array of strings indicating the rack that each DataNode is on |
| */ |
| public MiniDFSCluster(int nameNodePort, |
| Configuration conf, |
| int numDataNodes, |
| boolean format, |
| boolean manageDfsDirs, |
| StartupOption operation, |
| String[] racks) throws IOException { |
| this(nameNodePort, conf, numDataNodes, format, manageDfsDirs, manageDfsDirs, |
| operation, racks, null, null); |
| } |
| |
| /** |
| * NOTE: if possible, the other constructors that don't have nameNode port |
| * parameter should be used as they will ensure that the servers use free ports. |
| * <p> |
| * Modify the config and start up the servers. |
| * |
| * @param nameNodePort suggestion for which rpc port to use. caller should |
| * use getNameNodePort() to get the actual port used. |
| * @param conf the base configuration to use in starting the servers. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param format if true, format the NameNode and DataNodes before starting up |
| * @param manageDfsDirs if true, the data directories for servers will be |
| * created and dfs.name.dir and dfs.data.dir will be set in the conf |
| * @param operation the operation with which to start the servers. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| * @param racks array of strings indicating the rack that each DataNode is on |
| * @param simulatedCapacities array of capacities of the simulated data nodes |
| */ |
| public MiniDFSCluster(int nameNodePort, |
| Configuration conf, |
| int numDataNodes, |
| boolean format, |
| boolean manageDfsDirs, |
| StartupOption operation, |
| String[] racks, |
| long[] simulatedCapacities) throws IOException { |
| this(nameNodePort, conf, numDataNodes, format, manageDfsDirs, manageDfsDirs, |
| operation, racks, null, simulatedCapacities); |
| } |
| |
| /** |
| * NOTE: if possible, the other constructors that don't have nameNode port |
| * parameter should be used as they will ensure that the servers use free ports. |
| * <p> |
| * Modify the config and start up the servers. |
| * |
| * @param nameNodePort suggestion for which rpc port to use. caller should |
| * use getNameNodePort() to get the actual port used. |
| * @param conf the base configuration to use in starting the servers. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param format if true, format the NameNode and DataNodes before starting up |
| * @param manageNameDfsDirs if true, the data directories for servers will be |
| * created and dfs.name.dir and dfs.data.dir will be set in the conf |
| * @param manageDataDfsDirs if true, the data directories for datanodes will |
| * be created and dfs.data.dir set to same in the conf |
| * @param operation the operation with which to start the servers. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| * @param racks array of strings indicating the rack that each DataNode is on |
| * @param hosts array of strings indicating the hostnames of each DataNode |
| * @param simulatedCapacities array of capacities of the simulated data nodes |
| */ |
| public MiniDFSCluster(int nameNodePort, |
| Configuration conf, |
| int numDataNodes, |
| boolean format, |
| boolean manageNameDfsDirs, |
| boolean manageDataDfsDirs, |
| StartupOption operation, |
| String[] racks, String hosts[], |
| long[] simulatedCapacities) throws IOException { |
| this.conf = conf; |
| base_dir = new File(getBaseDirectory()); |
| data_dir = new File(base_dir, "data"); |
| |
| // use alternate RPC engine if spec'd |
| String rpcEngineName = System.getProperty("hdfs.rpc.engine"); |
| if (rpcEngineName != null && !"".equals(rpcEngineName)) { |
| |
| System.out.println("HDFS using RPCEngine: "+rpcEngineName); |
| try { |
| Class<?> rpcEngine = conf.getClassByName(rpcEngineName); |
| setRpcEngine(conf, NamenodeProtocols.class, rpcEngine); |
| setRpcEngine(conf, NamenodeProtocol.class, rpcEngine); |
| setRpcEngine(conf, ClientProtocol.class, rpcEngine); |
| setRpcEngine(conf, DatanodeProtocol.class, rpcEngine); |
| setRpcEngine(conf, RefreshAuthorizationPolicyProtocol.class, rpcEngine); |
| setRpcEngine(conf, RefreshUserToGroupMappingsProtocol.class, rpcEngine); |
| } catch (ClassNotFoundException e) { |
| throw new RuntimeException(e); |
| } |
| |
| // disable service authorization, as it does not work with tunnelled RPC |
| conf.setBoolean(CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, |
| false); |
| } |
| |
| // Setup the NameNode configuration |
| FileSystem.setDefaultUri(conf, "hdfs://localhost:"+ Integer.toString(nameNodePort)); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY, "127.0.0.1:0"); |
| if (manageNameDfsDirs) { |
| conf.set(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY, |
| fileAsURI(new File(base_dir, "name1"))+","+ |
| fileAsURI(new File(base_dir, "name2"))); |
| conf.set(DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_DIR_KEY, |
| fileAsURI(new File(base_dir, "namesecondary1"))+","+ |
| fileAsURI(new File(base_dir, "namesecondary2"))); |
| } |
| |
| int replication = conf.getInt("dfs.replication", 3); |
| conf.setInt("dfs.replication", Math.min(replication, numDataNodes)); |
| conf.setInt(DFSConfigKeys.DFS_NAMENODE_SAFEMODE_EXTENSION_KEY, 0); |
| conf.setInt("dfs.namenode.decommission.interval", 3); // 3 second |
| |
| // Format and clean out DataNode directories |
| if (format) { |
| if (data_dir.exists() && !FileUtil.fullyDelete(data_dir)) { |
| throw new IOException("Cannot remove data directory: " + data_dir); |
| } |
| NameNode.format(conf); |
| } |
| |
| // Start the NameNode |
| String[] args = (operation == null || |
| operation == StartupOption.FORMAT || |
| operation == StartupOption.REGULAR) ? |
| new String[] {} : new String[] {operation.getName()}; |
| conf.setClass(DFSConfigKeys.NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY, |
| StaticMapping.class, DNSToSwitchMapping.class); |
| nameNode = NameNode.createNameNode(args, conf); |
| |
| // Start the DataNodes |
| startDataNodes(conf, numDataNodes, manageDataDfsDirs, |
| operation, racks, hosts, simulatedCapacities); |
| waitClusterUp(); |
| String myUriStr = "hdfs://localhost:"+ Integer.toString(this.getNameNodePort()); |
| try { |
| this.myUri = new URI(myUriStr); |
| } catch (URISyntaxException e) { |
| NameNode.LOG.warn("unexpected URISyntaxException: " + e ); |
| } |
| } |
| |
| private void setRpcEngine(Configuration conf, Class<?> protocol, Class<?> engine) { |
| conf.setClass("rpc.engine."+protocol.getName(), engine, Object.class); |
| } |
| |
| /** |
| * |
| * @return URI of this MiniDFSCluster |
| */ |
| public URI getURI() { |
| return myUri; |
| } |
| |
| /** |
| * Get configuration. |
| * @return Configuration of this MiniDFSCluster |
| */ |
| public Configuration getConfiguration() { |
| return conf; |
| } |
| |
| /** |
| * wait for the cluster to get out of |
| * safemode. |
| */ |
| public void waitClusterUp() { |
| if (numDataNodes > 0) { |
| while (!isClusterUp()) { |
| try { |
| LOG.warn("Waiting for the Mini HDFS Cluster to start..."); |
| Thread.sleep(1000); |
| } catch (InterruptedException e) { |
| } |
| } |
| } |
| } |
| |
| /** |
| * Modify the config and start up additional DataNodes. The info port for |
| * DataNodes is guaranteed to use a free port. |
| * |
| * Data nodes can run with the name node in the mini cluster or |
| * a real name node. For example, running with a real name node is useful |
| * when running simulated data nodes with a real name node. |
| * If minicluster's name node is null assume that the conf has been |
| * set with the right address:port of the name node. |
| * |
| * @param conf the base configuration to use in starting the DataNodes. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param manageDfsDirs if true, the data directories for DataNodes will be |
| * created and dfs.data.dir will be set in the conf |
| * @param operation the operation with which to start the DataNodes. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| * @param racks array of strings indicating the rack that each DataNode is on |
| * @param hosts array of strings indicating the hostnames for each DataNode |
| * @param simulatedCapacities array of capacities of the simulated data nodes |
| * |
| * @throws IllegalStateException if NameNode has been shutdown |
| */ |
| public synchronized void startDataNodes(Configuration conf, int numDataNodes, |
| boolean manageDfsDirs, StartupOption operation, |
| String[] racks, String[] hosts, |
| long[] simulatedCapacities) throws IOException { |
| |
| int curDatanodesNum = dataNodes.size(); |
| // for mincluster's the default initialDelay for BRs is 0 |
| if (conf.get("dfs.blockreport.initialDelay") == null) { |
| conf.setLong("dfs.blockreport.initialDelay", 0); |
| } |
| // If minicluster's name node is null assume that the conf has been |
| // set with the right address:port of the name node. |
| // |
| if (nameNode != null) { // set conf from the name node |
| InetSocketAddress nnAddr = nameNode.getNameNodeAddress(); |
| int nameNodePort = nnAddr.getPort(); |
| FileSystem.setDefaultUri(conf, |
| "hdfs://"+ nnAddr.getHostName() + |
| ":" + Integer.toString(nameNodePort)); |
| } |
| |
| if (racks != null && numDataNodes > racks.length ) { |
| throw new IllegalArgumentException( "The length of racks [" + racks.length |
| + "] is less than the number of datanodes [" + numDataNodes + "]."); |
| } |
| if (hosts != null && numDataNodes > hosts.length ) { |
| throw new IllegalArgumentException( "The length of hosts [" + hosts.length |
| + "] is less than the number of datanodes [" + numDataNodes + "]."); |
| } |
| //Generate some hostnames if required |
| if (racks != null && hosts == null) { |
| System.out.println("Generating host names for datanodes"); |
| hosts = new String[numDataNodes]; |
| for (int i = curDatanodesNum; i < curDatanodesNum + numDataNodes; i++) { |
| hosts[i - curDatanodesNum] = "host" + i + ".foo.com"; |
| } |
| } |
| |
| if (simulatedCapacities != null |
| && numDataNodes > simulatedCapacities.length) { |
| throw new IllegalArgumentException( "The length of simulatedCapacities [" |
| + simulatedCapacities.length |
| + "] is less than the number of datanodes [" + numDataNodes + "]."); |
| } |
| |
| // Set up the right ports for the datanodes |
| conf.set("dfs.datanode.address", "127.0.0.1:0"); |
| conf.set("dfs.datanode.http.address", "127.0.0.1:0"); |
| conf.set("dfs.datanode.ipc.address", "127.0.0.1:0"); |
| |
| |
| String [] dnArgs = (operation == null || |
| operation != StartupOption.ROLLBACK) ? |
| null : new String[] {operation.getName()}; |
| |
| |
| for (int i = curDatanodesNum; i < curDatanodesNum+numDataNodes; i++) { |
| Configuration dnConf = new HdfsConfiguration(conf); |
| if (manageDfsDirs) { |
| File dir1 = new File(data_dir, "data"+(2*i+1)); |
| File dir2 = new File(data_dir, "data"+(2*i+2)); |
| dir1.mkdirs(); |
| dir2.mkdirs(); |
| if (!dir1.isDirectory() || !dir2.isDirectory()) { |
| throw new IOException("Mkdirs failed to create directory for DataNode " |
| + i + ": " + dir1 + " or " + dir2); |
| } |
| String dirs = fileAsURI(dir1) + "," + fileAsURI(dir2); |
| dnConf.set(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, dirs); |
| conf.set(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, dirs); |
| } |
| if (simulatedCapacities != null) { |
| dnConf.setBoolean("dfs.datanode.simulateddatastorage", true); |
| dnConf.setLong(SimulatedFSDataset.CONFIG_PROPERTY_CAPACITY, |
| simulatedCapacities[i-curDatanodesNum]); |
| } |
| System.out.println("Starting DataNode " + i + " with " |
| + DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY + ": " |
| + dnConf.get(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY)); |
| if (hosts != null) { |
| dnConf.set(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY, hosts[i - curDatanodesNum]); |
| System.out.println("Starting DataNode " + i + " with hostname set to: " |
| + dnConf.get(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY)); |
| } |
| if (racks != null) { |
| String name = hosts[i - curDatanodesNum]; |
| System.out.println("Adding node with hostname : " + name + " to rack "+ |
| racks[i-curDatanodesNum]); |
| StaticMapping.addNodeToRack(name, |
| racks[i-curDatanodesNum]); |
| } |
| Configuration newconf = new HdfsConfiguration(dnConf); // save config |
| if (hosts != null) { |
| NetUtils.addStaticResolution(hosts[i - curDatanodesNum], "localhost"); |
| } |
| DataNode dn = DataNode.instantiateDataNode(dnArgs, dnConf); |
| if(dn == null) |
| throw new IOException("Cannot start DataNode in " |
| + dnConf.get(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY)); |
| //since the HDFS does things based on IP:port, we need to add the mapping |
| //for IP:port to rackId |
| String ipAddr = dn.getSelfAddr().getAddress().getHostAddress(); |
| if (racks != null) { |
| int port = dn.getSelfAddr().getPort(); |
| System.out.println("Adding node with IP:port : " + ipAddr + ":" + port+ |
| " to rack " + racks[i-curDatanodesNum]); |
| StaticMapping.addNodeToRack(ipAddr + ":" + port, |
| racks[i-curDatanodesNum]); |
| } |
| DataNode.runDatanodeDaemon(dn); |
| dataNodes.add(new DataNodeProperties(dn, newconf, dnArgs)); |
| } |
| curDatanodesNum += numDataNodes; |
| this.numDataNodes += numDataNodes; |
| waitActive(); |
| } |
| |
| |
| |
| /** |
| * Modify the config and start up the DataNodes. The info port for |
| * DataNodes is guaranteed to use a free port. |
| * |
| * @param conf the base configuration to use in starting the DataNodes. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param manageDfsDirs if true, the data directories for DataNodes will be |
| * created and dfs.data.dir will be set in the conf |
| * @param operation the operation with which to start the DataNodes. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| * @param racks array of strings indicating the rack that each DataNode is on |
| * |
| * @throws IllegalStateException if NameNode has been shutdown |
| */ |
| |
| public void startDataNodes(Configuration conf, int numDataNodes, |
| boolean manageDfsDirs, StartupOption operation, |
| String[] racks |
| ) throws IOException { |
| startDataNodes( conf, numDataNodes, manageDfsDirs, operation, racks, null, null); |
| } |
| |
| /** |
| * Modify the config and start up additional DataNodes. The info port for |
| * DataNodes is guaranteed to use a free port. |
| * |
| * Data nodes can run with the name node in the mini cluster or |
| * a real name node. For example, running with a real name node is useful |
| * when running simulated data nodes with a real name node. |
| * If minicluster's name node is null assume that the conf has been |
| * set with the right address:port of the name node. |
| * |
| * @param conf the base configuration to use in starting the DataNodes. This |
| * will be modified as necessary. |
| * @param numDataNodes Number of DataNodes to start; may be zero |
| * @param manageDfsDirs if true, the data directories for DataNodes will be |
| * created and dfs.data.dir will be set in the conf |
| * @param operation the operation with which to start the DataNodes. If null |
| * or StartupOption.FORMAT, then StartupOption.REGULAR will be used. |
| * @param racks array of strings indicating the rack that each DataNode is on |
| * @param simulatedCapacities array of capacities of the simulated data nodes |
| * |
| * @throws IllegalStateException if NameNode has been shutdown |
| */ |
| public void startDataNodes(Configuration conf, int numDataNodes, |
| boolean manageDfsDirs, StartupOption operation, |
| String[] racks, |
| long[] simulatedCapacities) throws IOException { |
| startDataNodes(conf, numDataNodes, manageDfsDirs, operation, racks, null, |
| simulatedCapacities); |
| |
| } |
| /** |
| * If the NameNode is running, attempt to finalize a previous upgrade. |
| * When this method return, the NameNode should be finalized, but |
| * DataNodes may not be since that occurs asynchronously. |
| * |
| * @throws IllegalStateException if the Namenode is not running. |
| */ |
| public void finalizeCluster(Configuration conf) throws Exception { |
| if (nameNode == null) { |
| throw new IllegalStateException("Attempting to finalize " |
| + "Namenode but it is not running"); |
| } |
| ToolRunner.run(new DFSAdmin(conf), new String[] {"-finalizeUpgrade"}); |
| } |
| |
| /** |
| * Gets the started NameNode. May be null. |
| */ |
| public NameNode getNameNode() { |
| return nameNode; |
| } |
| |
| /** |
| * Return the {@link FSNamesystem} object. |
| * @return {@link FSNamesystem} object. |
| */ |
| public FSNamesystem getNamesystem() { |
| return NameNodeAdapter.getNamesystem(nameNode); |
| } |
| |
| /** |
| * Gets a list of the started DataNodes. May be empty. |
| */ |
| public ArrayList<DataNode> getDataNodes() { |
| ArrayList<DataNode> list = new ArrayList<DataNode>(); |
| for (int i = 0; i < dataNodes.size(); i++) { |
| DataNode node = dataNodes.get(i).datanode; |
| list.add(node); |
| } |
| return list; |
| } |
| |
| /** @return the datanode having the ipc server listen port */ |
| public DataNode getDataNode(int ipcPort) { |
| for(DataNode dn : getDataNodes()) { |
| if (dn.ipcServer.getListenerAddress().getPort() == ipcPort) { |
| return dn; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Gets the rpc port used by the NameNode, because the caller |
| * supplied port is not necessarily the actual port used. |
| */ |
| public int getNameNodePort() { |
| return nameNode.getNameNodeAddress().getPort(); |
| } |
| |
| /** |
| * Shut down the servers that are up. |
| */ |
| public void shutdown() { |
| System.out.println("Shutting down the Mini HDFS Cluster"); |
| shutdownDataNodes(); |
| if (nameNode != null) { |
| nameNode.stop(); |
| nameNode.join(); |
| nameNode = null; |
| } |
| } |
| |
| /** |
| * Shutdown all DataNodes started by this class. The NameNode |
| * is left running so that new DataNodes may be started. |
| */ |
| public void shutdownDataNodes() { |
| for (int i = dataNodes.size()-1; i >= 0; i--) { |
| LOG.info("Shutting down DataNode " + i); |
| DataNode dn = dataNodes.remove(i).datanode; |
| dn.shutdown(); |
| numDataNodes--; |
| } |
| } |
| |
| /** |
| * Shutdown namenode. |
| */ |
| public synchronized void shutdownNameNode() { |
| if (nameNode != null) { |
| System.out.println("Shutting down the namenode"); |
| nameNode.stop(); |
| nameNode.join(); |
| nameNode = null; |
| } |
| } |
| |
| /** |
| * Restart namenode. |
| */ |
| public synchronized void restartNameNode() throws IOException { |
| shutdownNameNode(); |
| nameNode = NameNode.createNameNode(new String[] {}, conf); |
| waitClusterUp(); |
| System.out.println("Restarted the namenode"); |
| int failedCount = 0; |
| while (true) { |
| try { |
| waitActive(); |
| break; |
| } catch (IOException e) { |
| failedCount++; |
| // Cached RPC connection to namenode, if any, is expected to fail once |
| if (failedCount > 1) { |
| System.out.println("Tried waitActive() " + failedCount |
| + " time(s) and failed, giving up. " |
| + StringUtils.stringifyException(e)); |
| throw e; |
| } |
| } |
| } |
| System.out.println("Cluster is active"); |
| } |
| |
| /* |
| * Corrupt a block on all datanode |
| */ |
| void corruptBlockOnDataNodes(String blockName) throws Exception{ |
| for (int i=0; i < dataNodes.size(); i++) |
| corruptBlockOnDataNode(i,blockName); |
| } |
| |
| /* |
| * Corrupt a block on a particular datanode |
| */ |
| boolean corruptBlockOnDataNode(int i, String blockName) throws Exception { |
| Random random = new Random(); |
| boolean corrupted = false; |
| File dataDir = new File(getBaseDirectory() + "data"); |
| if (i < 0 || i >= dataNodes.size()) |
| return false; |
| for (int dn = i*2; dn < i*2+2; dn++) { |
| File blockFile = new File(dataDir, "data" + (dn+1) + FINALIZED_DIR_NAME + |
| blockName); |
| System.out.println("Corrupting for: " + blockFile); |
| if (blockFile.exists()) { |
| // Corrupt replica by writing random bytes into replica |
| RandomAccessFile raFile = new RandomAccessFile(blockFile, "rw"); |
| FileChannel channel = raFile.getChannel(); |
| String badString = "BADBAD"; |
| int rand = random.nextInt((int)channel.size()/2); |
| raFile.seek(rand); |
| raFile.write(badString.getBytes()); |
| raFile.close(); |
| } |
| corrupted = true; |
| } |
| return corrupted; |
| } |
| |
| /* |
| * Shutdown a particular datanode |
| */ |
| public synchronized DataNodeProperties stopDataNode(int i) { |
| if (i < 0 || i >= dataNodes.size()) { |
| return null; |
| } |
| DataNodeProperties dnprop = dataNodes.remove(i); |
| DataNode dn = dnprop.datanode; |
| System.out.println("MiniDFSCluster Stopping DataNode " + |
| dn.dnRegistration.getName() + |
| " from a total of " + (dataNodes.size() + 1) + |
| " datanodes."); |
| dn.shutdown(); |
| numDataNodes--; |
| return dnprop; |
| } |
| |
| /* |
| * Shutdown a datanode by name. |
| */ |
| public synchronized DataNodeProperties stopDataNode(String name) { |
| int i; |
| for (i = 0; i < dataNodes.size(); i++) { |
| DataNode dn = dataNodes.get(i).datanode; |
| if (dn.dnRegistration.getName().equals(name)) { |
| break; |
| } |
| } |
| return stopDataNode(i); |
| } |
| |
| /** |
| * Restart a datanode |
| * @param dnprop datanode's property |
| * @return true if restarting is successful |
| * @throws IOException |
| */ |
| public boolean restartDataNode(DataNodeProperties dnprop) throws IOException { |
| return restartDataNode(dnprop, false); |
| } |
| |
| /** |
| * Restart a datanode, on the same port if requested |
| * @param dnprop the datanode to restart |
| * @param keepPort whether to use the same port |
| * @return true if restarting is successful |
| * @throws IOException |
| */ |
| public synchronized boolean restartDataNode(DataNodeProperties dnprop, |
| boolean keepPort) throws IOException { |
| Configuration conf = dnprop.conf; |
| String[] args = dnprop.dnArgs; |
| Configuration newconf = new HdfsConfiguration(conf); // save cloned config |
| if (keepPort) { |
| InetSocketAddress addr = dnprop.datanode.getSelfAddr(); |
| conf.set("dfs.datanode.address", addr.getAddress().getHostAddress() + ":" |
| + addr.getPort()); |
| } |
| dataNodes.add(new DataNodeProperties(DataNode.createDataNode(args, conf), |
| newconf, args)); |
| numDataNodes++; |
| return true; |
| } |
| |
| /* |
| * Restart a particular datanode, use newly assigned port |
| */ |
| public boolean restartDataNode(int i) throws IOException { |
| return restartDataNode(i, false); |
| } |
| |
| /* |
| * Restart a particular datanode, on the same port if keepPort is true |
| */ |
| public synchronized boolean restartDataNode(int i, boolean keepPort) |
| throws IOException { |
| DataNodeProperties dnprop = stopDataNode(i); |
| if (dnprop == null) { |
| return false; |
| } else { |
| return restartDataNode(dnprop, keepPort); |
| } |
| } |
| |
| /* |
| * Restart all datanodes, on the same ports if keepPort is true |
| */ |
| public synchronized boolean restartDataNodes(boolean keepPort) |
| throws IOException { |
| for (int i = dataNodes.size() - 1; i >= 0; i--) { |
| if (!restartDataNode(i, keepPort)) |
| return false; |
| System.out.println("Restarted DataNode " + i); |
| } |
| return true; |
| } |
| |
| /* |
| * Restart all datanodes, use newly assigned ports |
| */ |
| public boolean restartDataNodes() throws IOException { |
| return restartDataNodes(false); |
| } |
| |
| /** |
| * Returns true if the NameNode is running and is out of Safe Mode. |
| */ |
| public boolean isClusterUp() { |
| if (nameNode == null) { |
| return false; |
| } |
| long[] sizes = nameNode.getStats(); |
| boolean isUp = false; |
| synchronized (this) { |
| isUp = (!nameNode.isInSafeMode() && sizes[0] != 0); |
| } |
| return isUp; |
| } |
| |
| /** |
| * Returns true if there is at least one DataNode running. |
| */ |
| public boolean isDataNodeUp() { |
| if (dataNodes == null || dataNodes.size() == 0) { |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Get a client handle to the DFS cluster. |
| */ |
| public FileSystem getFileSystem() throws IOException { |
| return FileSystem.get(conf); |
| } |
| |
| |
| /** |
| * Get another FileSystem instance that is different from FileSystem.get(conf). |
| * This simulating different threads working on different FileSystem instances. |
| */ |
| public FileSystem getNewFileSystemInstance() throws IOException { |
| return FileSystem.newInstance(conf); |
| } |
| |
| /** |
| * @return a {@link HftpFileSystem} object. |
| */ |
| public HftpFileSystem getHftpFileSystem() throws IOException { |
| final String str = "hftp://" |
| + conf.get(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY); |
| try { |
| return (HftpFileSystem)FileSystem.get(new URI(str), conf); |
| } catch (URISyntaxException e) { |
| throw new IOException(e); |
| } |
| } |
| |
| /** |
| * Get the directories where the namenode stores its image. |
| */ |
| public Collection<URI> getNameDirs() { |
| return FSNamesystem.getNamespaceDirs(conf); |
| } |
| |
| /** |
| * Get the directories where the namenode stores its edits. |
| */ |
| public Collection<URI> getNameEditsDirs() { |
| return FSNamesystem.getNamespaceEditsDirs(conf); |
| } |
| |
| /** |
| * Wait until the cluster is active and running. |
| */ |
| public void waitActive() throws IOException { |
| if (nameNode == null) { |
| return; |
| } |
| InetSocketAddress addr = new InetSocketAddress("localhost", |
| getNameNodePort()); |
| DFSClient client = new DFSClient(addr, conf); |
| |
| // make sure all datanodes have registered and sent heartbeat |
| while (shouldWait(client.datanodeReport(DatanodeReportType.LIVE))) { |
| try { |
| Thread.sleep(100); |
| } catch (InterruptedException e) { |
| } |
| } |
| |
| client.close(); |
| } |
| |
| private synchronized boolean shouldWait(DatanodeInfo[] dnInfo) { |
| if (dnInfo.length != numDataNodes) { |
| return true; |
| } |
| // make sure all datanodes have sent first heartbeat to namenode, |
| // using (capacity == 0) as proxy. |
| for (DatanodeInfo dn : dnInfo) { |
| if (dn.getCapacity() == 0) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public void formatDataNodeDirs() throws IOException { |
| base_dir = new File(getBaseDirectory()); |
| data_dir = new File(base_dir, "data"); |
| if (data_dir.exists() && !FileUtil.fullyDelete(data_dir)) { |
| throw new IOException("Cannot remove data directory: " + data_dir); |
| } |
| } |
| |
| /** |
| * |
| * @param dataNodeIndex - data node whose block report is desired - the index is same as for getDataNodes() |
| * @return the block report for the specified data node |
| */ |
| public Iterable<Block> getBlockReport(int dataNodeIndex) { |
| if (dataNodeIndex < 0 || dataNodeIndex > dataNodes.size()) { |
| throw new IndexOutOfBoundsException(); |
| } |
| return dataNodes.get(dataNodeIndex).datanode.getFSDataset().getBlockReport(); |
| } |
| |
| |
| /** |
| * |
| * @return block reports from all data nodes |
| * BlockListAsLongs is indexed in the same order as the list of datanodes returned by getDataNodes() |
| */ |
| public Iterable<Block>[] getAllBlockReports() { |
| int numDataNodes = dataNodes.size(); |
| Iterable<Block>[] result = new BlockListAsLongs[numDataNodes]; |
| for (int i = 0; i < numDataNodes; ++i) { |
| result[i] = getBlockReport(i); |
| } |
| return result; |
| } |
| |
| |
| /** |
| * This method is valid only if the data nodes have simulated data |
| * @param dataNodeIndex - data node i which to inject - the index is same as for getDataNodes() |
| * @param blocksToInject - the blocks |
| * @throws IOException |
| * if not simulatedFSDataset |
| * if any of blocks already exist in the data node |
| * |
| */ |
| public void injectBlocks(int dataNodeIndex, Iterable<Block> blocksToInject) throws IOException { |
| if (dataNodeIndex < 0 || dataNodeIndex > dataNodes.size()) { |
| throw new IndexOutOfBoundsException(); |
| } |
| FSDatasetInterface dataSet = dataNodes.get(dataNodeIndex).datanode.getFSDataset(); |
| if (!(dataSet instanceof SimulatedFSDataset)) { |
| throw new IOException("injectBlocks is valid only for SimilatedFSDataset"); |
| } |
| SimulatedFSDataset sdataset = (SimulatedFSDataset) dataSet; |
| sdataset.injectBlocks(blocksToInject); |
| dataNodes.get(dataNodeIndex).datanode.scheduleBlockReport(0); |
| } |
| |
| /** |
| * This method is valid only if the data nodes have simulated data |
| * @param blocksToInject - blocksToInject[] is indexed in the same order as the list |
| * of datanodes returned by getDataNodes() |
| * @throws IOException |
| * if not simulatedFSDataset |
| * if any of blocks already exist in the data nodes |
| * Note the rest of the blocks are not injected. |
| */ |
| public void injectBlocks(Iterable<Block>[] blocksToInject) throws IOException { |
| if (blocksToInject.length > dataNodes.size()) { |
| throw new IndexOutOfBoundsException(); |
| } |
| for (int i = 0; i < blocksToInject.length; ++i) { |
| injectBlocks(i, blocksToInject[i]); |
| } |
| } |
| |
| /** |
| * Set the softLimit and hardLimit of client lease periods |
| */ |
| void setLeasePeriod(long soft, long hard) { |
| final FSNamesystem namesystem = getNamesystem(); |
| namesystem.leaseManager.setLeasePeriod(soft, hard); |
| namesystem.lmthread.interrupt(); |
| } |
| |
| /** |
| * Returns the current set of datanodes |
| */ |
| DataNode[] listDataNodes() { |
| DataNode[] list = new DataNode[dataNodes.size()]; |
| for (int i = 0; i < dataNodes.size(); i++) { |
| list[i] = dataNodes.get(i).datanode; |
| } |
| return list; |
| } |
| |
| /** |
| * Access to the data directory used for Datanodes |
| */ |
| public String getDataDirectory() { |
| return data_dir.getAbsolutePath(); |
| } |
| |
| public static String getBaseDirectory() { |
| return System.getProperty("test.build.data", "build/test/data") + "/dfs/"; |
| } |
| } |
