| /** |
| * 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.server.namenode; |
| |
| import java.io.File; |
| |
| import org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.CommandLineParser; |
| import org.apache.commons.cli.HelpFormatter; |
| import org.apache.commons.cli.Option; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.cli.ParseException; |
| import org.apache.commons.cli.PosixParser; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.server.common.blockaliasmap.BlockAliasMap; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| /** |
| * Create FSImage from an external namespace. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public class FileSystemImage implements Tool { |
| |
| private Configuration conf; |
| |
| @Override |
| public Configuration getConf() { |
| return conf; |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| // require absolute URI to write anywhere but local |
| FileSystem.setDefaultUri(conf, new File(".").toURI().toString()); |
| } |
| |
| protected void printUsage() { |
| HelpFormatter formatter = new HelpFormatter(); |
| formatter.printHelp("fs2img [OPTIONS] URI", new Options()); |
| formatter.setSyntaxPrefix(""); |
| formatter.printHelp("Options", options()); |
| ToolRunner.printGenericCommandUsage(System.out); |
| } |
| |
| static Options options() { |
| Options options = new Options(); |
| options.addOption("o", "outdir", true, "Output directory"); |
| options.addOption("u", "ugiclass", true, "UGI resolver class"); |
| options.addOption("b", "blockclass", true, "Block output class"); |
| options.addOption("i", "blockidclass", true, "Block resolver class"); |
| options.addOption("c", "cachedirs", true, "Max active dirents"); |
| options.addOption("cid", "clusterID", true, "Cluster ID"); |
| options.addOption("bpid", "blockPoolID", true, "Block Pool ID"); |
| options.addOption("h", "help", false, "Print usage"); |
| return options; |
| } |
| |
| @Override |
| public int run(String[] argv) throws Exception { |
| Options options = options(); |
| CommandLineParser parser = new PosixParser(); |
| CommandLine cmd; |
| try { |
| cmd = parser.parse(options, argv); |
| } catch (ParseException e) { |
| System.out.println( |
| "Error parsing command-line options: " + e.getMessage()); |
| printUsage(); |
| return -1; |
| } |
| |
| if (cmd.hasOption("h")) { |
| printUsage(); |
| return -1; |
| } |
| |
| ImageWriter.Options opts = |
| ReflectionUtils.newInstance(ImageWriter.Options.class, getConf()); |
| for (Option o : cmd.getOptions()) { |
| switch (o.getOpt()) { |
| case "o": |
| opts.output(o.getValue()); |
| break; |
| case "u": |
| opts.ugi(Class.forName(o.getValue()).asSubclass(UGIResolver.class)); |
| break; |
| case "b": |
| opts.blocks( |
| Class.forName(o.getValue()).asSubclass(BlockAliasMap.class)); |
| break; |
| case "i": |
| opts.blockIds( |
| Class.forName(o.getValue()).asSubclass(BlockResolver.class)); |
| break; |
| case "c": |
| opts.cache(Integer.parseInt(o.getValue())); |
| break; |
| case "cid": |
| opts.clusterID(o.getValue()); |
| break; |
| case "bpid": |
| opts.blockPoolID(o.getValue()); |
| break; |
| default: |
| throw new UnsupportedOperationException( |
| "Unknown option: " + o.getOpt()); |
| } |
| } |
| |
| String[] rem = cmd.getArgs(); |
| if (rem.length != 1) { |
| printUsage(); |
| return -1; |
| } |
| |
| try (ImageWriter w = new ImageWriter(opts)) { |
| for (TreePath e : new FSTreeWalk(new Path(rem[0]), getConf())) { |
| w.accept(e); // add and continue |
| } |
| } |
| return 0; |
| } |
| |
| public static void main(String[] argv) throws Exception { |
| int ret = ToolRunner.run(new FileSystemImage(), argv); |
| System.exit(ret); |
| } |
| |
| } |