| /** |
| * 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.hbase.replication.regionserver; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.Abortable; |
| import org.apache.hadoop.hbase.ChoreService; |
| import org.apache.hadoop.hbase.CoordinatedStateManager; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.Server; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.client.ClusterConnection; |
| import org.apache.hadoop.hbase.util.FSUtils; |
| import org.apache.hadoop.hbase.zookeeper.MetaTableLocator; |
| import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| /** |
| * In a scenario of Replication based Disaster/Recovery, when hbase |
| * Master-Cluster crashes, this tool is used to sync-up the delta from Master to |
| * Slave using the info from Zookeeper. The tool will run on Master-Cluser, and |
| * assume ZK, Filesystem and NetWork still available after hbase crashes |
| * |
| * hbase org.apache.hadoop.hbase.replication.regionserver.ReplicationSyncUp |
| */ |
| |
| public class ReplicationSyncUp extends Configured implements Tool { |
| |
| private static final Log LOG = LogFactory.getLog(ReplicationSyncUp.class.getName()); |
| |
| private static Configuration conf; |
| |
| private static final long SLEEP_TIME = 10000; |
| |
| // although the tool is designed to be run on command line |
| // this api is provided for executing the tool through another app |
| public static void setConfigure(Configuration config) { |
| conf = config; |
| } |
| |
| /** |
| * Main program |
| * @param args |
| * @throws Exception |
| */ |
| public static void main(String[] args) throws Exception { |
| if (conf == null) conf = HBaseConfiguration.create(); |
| int ret = ToolRunner.run(conf, new ReplicationSyncUp(), args); |
| System.exit(ret); |
| } |
| |
| @Override |
| public int run(String[] args) throws Exception { |
| Replication replication; |
| ReplicationSourceManager manager; |
| FileSystem fs; |
| Path oldLogDir, logDir, walRootDir; |
| ZooKeeperWatcher zkw; |
| |
| Abortable abortable = new Abortable() { |
| @Override |
| public void abort(String why, Throwable e) { |
| } |
| |
| @Override |
| public boolean isAborted() { |
| return false; |
| } |
| }; |
| |
| zkw = |
| new ZooKeeperWatcher(conf, "syncupReplication" + System.currentTimeMillis(), abortable, |
| true); |
| |
| walRootDir = FSUtils.getWALRootDir(conf); |
| fs = FSUtils.getWALFileSystem(conf); |
| oldLogDir = new Path(walRootDir, HConstants.HREGION_OLDLOGDIR_NAME); |
| logDir = new Path(walRootDir, HConstants.HREGION_LOGDIR_NAME); |
| |
| System.out.println("Start Replication Server start"); |
| replication = new Replication(new DummyServer(zkw), fs, logDir, oldLogDir); |
| manager = replication.getReplicationManager(); |
| manager.init(); |
| |
| try { |
| int numberOfOldSource = 1; // default wait once |
| while (numberOfOldSource > 0) { |
| Thread.sleep(SLEEP_TIME); |
| numberOfOldSource = manager.getOldSources().size(); |
| } |
| manager.join(); |
| } catch (InterruptedException e) { |
| System.err.println("didn't wait long enough:" + e); |
| return (-1); |
| } finally { |
| zkw.close(); |
| } |
| |
| return (0); |
| } |
| |
| static class DummyServer implements Server { |
| String hostname; |
| ZooKeeperWatcher zkw; |
| |
| DummyServer(ZooKeeperWatcher zkw) { |
| // an unique name in case the first run fails |
| hostname = System.currentTimeMillis() + ".SyncUpTool.replication.org"; |
| this.zkw = zkw; |
| } |
| |
| DummyServer(String hostname) { |
| this.hostname = hostname; |
| } |
| |
| @Override |
| public Configuration getConfiguration() { |
| return conf; |
| } |
| |
| @Override |
| public ZooKeeperWatcher getZooKeeper() { |
| return zkw; |
| } |
| |
| @Override |
| public CoordinatedStateManager getCoordinatedStateManager() { |
| return null; |
| } |
| |
| @Override |
| public MetaTableLocator getMetaTableLocator() { |
| return null; |
| } |
| |
| @Override |
| public ServerName getServerName() { |
| return ServerName.valueOf(hostname, 1234, 1L); |
| } |
| |
| @Override |
| public void abort(String why, Throwable e) { |
| } |
| |
| @Override |
| public boolean isAborted() { |
| return false; |
| } |
| |
| @Override |
| public void stop(String why) { |
| } |
| |
| @Override |
| public boolean isStopped() { |
| return false; |
| } |
| |
| @Override |
| public ClusterConnection getConnection() { |
| return null; |
| } |
| |
| @Override |
| public ChoreService getChoreService() { |
| return null; |
| } |
| } |
| } |