1 /** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 20 package org.apache.hadoop.hbase.zookeeper; 21 22 import java.util.Properties; 23 import java.util.Map.Entry; 24 25 import org.apache.hadoop.classification.InterfaceAudience; 26 import org.apache.hadoop.classification.InterfaceStability; 27 import org.apache.hadoop.conf.Configuration; 28 import org.apache.hadoop.hbase.HBaseConfiguration; 29 30 /** 31 * Tool for reading ZooKeeper servers from HBase XML configuration and producing 32 * a line-by-line list for use by bash scripts. 33 */ 34 @InterfaceAudience.Public 35 @InterfaceStability.Evolving 36 public class ZKServerTool { 37 /** 38 * Run the tool. 39 * @param args Command line arguments. 40 */ 41 public static void main(String args[]) { 42 Configuration conf = HBaseConfiguration.create(); 43 // Note that we do not simply grab the property 44 // HConstants.ZOOKEEPER_QUORUM from the HBaseConfiguration because the 45 // user may be using a zoo.cfg file. 46 Properties zkProps = ZKConfig.makeZKProps(conf); 47 for (Entry<Object, Object> entry : zkProps.entrySet()) { 48 String key = entry.getKey().toString().trim(); 49 String value = entry.getValue().toString().trim(); 50 if (key.startsWith("server.")) { 51 String[] parts = value.split(":"); 52 String host = parts[0]; 53 System.out.println("ZK host:" + host); 54 } 55 } 56 } 57 }