| /** |
| * 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.raid; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.HashMap; |
| import java.util.concurrent.TimeUnit; |
| import java.net.InetSocketAddress; |
| import javax.security.auth.login.LoginException; |
| |
| import org.apache.hadoop.ipc.*; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| import org.apache.hadoop.io.retry.RetryPolicy; |
| import org.apache.hadoop.io.retry.RetryPolicies; |
| import org.apache.hadoop.io.retry.RetryProxy; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.fs.Path; |
| |
| import org.apache.hadoop.raid.protocol.PolicyInfo; |
| import org.apache.hadoop.raid.protocol.PolicyList; |
| import org.apache.hadoop.raid.protocol.RaidProtocol; |
| |
| /** |
| * A {@link RaidShell} that allows browsing configured raid policies. |
| */ |
| public class RaidShell extends Configured implements Tool { |
| public static final Log LOG = LogFactory.getLog( "org.apache.hadoop.RaidShell"); |
| public RaidProtocol raidnode; |
| final RaidProtocol rpcRaidnode; |
| private UserGroupInformation ugi; |
| volatile boolean clientRunning = true; |
| private Configuration conf; |
| |
| /** |
| * Start RaidShell. |
| * <p> |
| * The RaidShell connects to the specified RaidNode and performs basic |
| * configuration options. |
| * @throws IOException |
| */ |
| public RaidShell() throws IOException { |
| this(new Configuration()); |
| } |
| |
| /** |
| * The RaidShell connects to the specified RaidNode and performs basic |
| * configuration options. |
| * @param conf The Hadoop configuration |
| * @throws IOException |
| */ |
| public RaidShell(Configuration conf) throws IOException { |
| this(conf, RaidNode.getAddress(conf)); |
| } |
| |
| public RaidShell(Configuration conf, InetSocketAddress address) throws IOException { |
| super(conf); |
| this.ugi = UserGroupInformation.getCurrentUser(); |
| |
| this.rpcRaidnode = createRPCRaidnode(address, conf, ugi); |
| this.raidnode = createRaidnode(rpcRaidnode); |
| } |
| |
| public static RaidProtocol createRaidnode(Configuration conf) throws IOException { |
| return createRaidnode(RaidNode.getAddress(conf), conf); |
| } |
| |
| public static RaidProtocol createRaidnode(InetSocketAddress raidNodeAddr, |
| Configuration conf) throws IOException { |
| return createRaidnode(createRPCRaidnode(raidNodeAddr, conf, |
| UserGroupInformation.getCurrentUser())); |
| |
| } |
| |
| private static RaidProtocol createRPCRaidnode(InetSocketAddress raidNodeAddr, |
| Configuration conf, UserGroupInformation ugi) |
| throws IOException { |
| LOG.info("RaidShell connecting to " + raidNodeAddr); |
| return (RaidProtocol)RPC.getProxy(RaidProtocol.class, |
| RaidProtocol.versionID, raidNodeAddr, ugi, conf, |
| NetUtils.getSocketFactory(conf, RaidProtocol.class)); |
| } |
| |
| private static RaidProtocol createRaidnode(RaidProtocol rpcRaidnode) |
| throws IOException { |
| RetryPolicy createPolicy = RetryPolicies.retryUpToMaximumCountWithFixedSleep( |
| 5, 5000, TimeUnit.MILLISECONDS); |
| |
| Map<Class<? extends Exception>,RetryPolicy> remoteExceptionToPolicyMap = |
| new HashMap<Class<? extends Exception>, RetryPolicy>(); |
| |
| Map<Class<? extends Exception>,RetryPolicy> exceptionToPolicyMap = |
| new HashMap<Class<? extends Exception>, RetryPolicy>(); |
| exceptionToPolicyMap.put(RemoteException.class, |
| RetryPolicies.retryByRemoteException( |
| RetryPolicies.TRY_ONCE_THEN_FAIL, remoteExceptionToPolicyMap)); |
| RetryPolicy methodPolicy = RetryPolicies.retryByException( |
| RetryPolicies.TRY_ONCE_THEN_FAIL, exceptionToPolicyMap); |
| Map<String,RetryPolicy> methodNameToPolicyMap = new HashMap<String,RetryPolicy>(); |
| |
| methodNameToPolicyMap.put("create", methodPolicy); |
| |
| return (RaidProtocol) RetryProxy.create(RaidProtocol.class, |
| rpcRaidnode, methodNameToPolicyMap); |
| } |
| |
| private void checkOpen() throws IOException { |
| if (!clientRunning) { |
| IOException result = new IOException("RaidNode closed"); |
| throw result; |
| } |
| } |
| |
| /** |
| * Close the connection to the raidNode. |
| */ |
| public synchronized void close() throws IOException { |
| if(clientRunning) { |
| clientRunning = false; |
| RPC.stopProxy(rpcRaidnode); |
| } |
| } |
| |
| /** |
| * Displays format of commands. |
| */ |
| private static void printUsage(String cmd) { |
| String prefix = "Usage: java " + RaidShell.class.getSimpleName(); |
| if ("-showConfig".equals(cmd)) { |
| System.err.println("Usage: java RaidShell" + |
| " [-showConfig]"); |
| } else if ("-recover".equals(cmd)) { |
| System.err.println("Usage: java CronShell" + |
| " [-recover srcPath1 corruptOffset]"); |
| } else { |
| System.err.println("Usage: java RaidShell"); |
| System.err.println(" [-showConfig ]"); |
| System.err.println(" [-help [cmd]]"); |
| System.err.println(" [-recover srcPath1 corruptOffset]"); |
| System.err.println(); |
| ToolRunner.printGenericCommandUsage(System.err); |
| } |
| } |
| |
| /** |
| * run |
| */ |
| public int run(String argv[]) throws Exception { |
| |
| if (argv.length < 1) { |
| printUsage(""); |
| return -1; |
| } |
| |
| int exitCode = -1; |
| int i = 0; |
| String cmd = argv[i++]; |
| // |
| // verify that we have enough command line parameters |
| // |
| if ("-showConfig".equals(cmd)) { |
| if (argv.length < 1) { |
| printUsage(cmd); |
| return exitCode; |
| } |
| } else if ("-recover".equals(cmd)) { |
| if (argv.length < 3) { |
| printUsage(cmd); |
| return exitCode; |
| } |
| } |
| |
| try { |
| if ("-showConfig".equals(cmd)) { |
| exitCode = showConfig(cmd, argv, i); |
| } else if ("-recover".equals(cmd)) { |
| exitCode = recoverAndPrint(cmd, argv, i); |
| } else { |
| exitCode = -1; |
| System.err.println(cmd.substring(1) + ": Unknown command"); |
| printUsage(""); |
| } |
| } catch (IllegalArgumentException arge) { |
| exitCode = -1; |
| System.err.println(cmd.substring(1) + ": " + arge.getLocalizedMessage()); |
| printUsage(cmd); |
| } catch (RemoteException e) { |
| // |
| // This is a error returned by raidnode server. Print |
| // out the first line of the error mesage, ignore the stack trace. |
| exitCode = -1; |
| try { |
| String[] content; |
| content = e.getLocalizedMessage().split("\n"); |
| System.err.println(cmd.substring(1) + ": " + |
| content[0]); |
| } catch (Exception ex) { |
| System.err.println(cmd.substring(1) + ": " + |
| ex.getLocalizedMessage()); |
| } |
| } catch (IOException e) { |
| // |
| // IO exception encountered locally. |
| // |
| exitCode = -1; |
| System.err.println(cmd.substring(1) + ": " + |
| e.getLocalizedMessage()); |
| } catch (Exception re) { |
| exitCode = -1; |
| System.err.println(cmd.substring(1) + ": " + re.getLocalizedMessage()); |
| } finally { |
| } |
| return exitCode; |
| } |
| |
| /** |
| * Apply operation specified by 'cmd' on all parameters |
| * starting from argv[startindex]. |
| */ |
| private int showConfig(String cmd, String argv[], int startindex) throws IOException { |
| int exitCode = 0; |
| int i = startindex; |
| PolicyList[] all = raidnode.getAllPolicies(); |
| for (PolicyList list: all) { |
| for (PolicyInfo p : list.getAll()) { |
| System.out.println(p); |
| } |
| } |
| return exitCode; |
| } |
| |
| /** |
| * Recovers the specified path from the parity file |
| */ |
| public Path[] recover(String cmd, String argv[], int startindex) |
| throws IOException { |
| Path[] paths = new Path[(argv.length - startindex) / 2]; |
| int j = 0; |
| for (int i = startindex; i < argv.length; i = i + 2) { |
| String path = argv[i]; |
| long corruptOffset = Long.parseLong(argv[i+1]); |
| LOG.info("RaidShell recoverFile for " + path + " corruptOffset " + corruptOffset); |
| paths[j] = new Path(raidnode.recoverFile(path, corruptOffset)); |
| LOG.info("Raidshell created recovery file " + paths[j]); |
| j++; |
| } |
| return paths; |
| } |
| |
| public int recoverAndPrint(String cmd, String argv[], int startindex) |
| throws IOException { |
| int exitCode = 0; |
| for (Path p : recover(cmd,argv,startindex)) { |
| System.out.println(p); |
| } |
| return exitCode; |
| } |
| |
| /** |
| * main() has some simple utility methods |
| */ |
| public static void main(String argv[]) throws Exception { |
| RaidShell shell = null; |
| try { |
| shell = new RaidShell(); |
| } catch (RPC.VersionMismatch v) { |
| System.err.println("Version Mismatch between client and server" + |
| "... command aborted."); |
| System.exit(-1); |
| } catch (IOException e) { |
| System.err.println("Bad connection to RaidNode. command aborted."); |
| System.exit(-1); |
| } |
| |
| int res; |
| try { |
| res = ToolRunner.run(shell, argv); |
| } finally { |
| shell.close(); |
| } |
| System.exit(res); |
| } |
| } |