| #!/usr/bin/env hbase-jruby |
| # |
| # 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. |
| |
| # Prints the hostname of the machine running the active master. |
| |
| include Java |
| java_import org.apache.hadoop.hbase.HBaseConfiguration |
| java_import org.apache.hadoop.hbase.ServerName |
| java_import org.apache.hadoop.hbase.zookeeper.ZKWatcher |
| java_import org.apache.hadoop.hbase.zookeeper.MasterAddressTracker |
| |
| # disable debug/info logging on this script for clarity |
| log_level = org.apache.log4j.Level::ERROR |
| org.apache.log4j.Logger.getLogger('org.apache.hadoop.hbase').setLevel(log_level) |
| org.apache.log4j.Logger.getLogger('org.apache.zookeeper').setLevel(log_level) |
| |
| config = HBaseConfiguration.create |
| |
| zk = ZKWatcher.new(config, 'get-active-master', nil) |
| begin |
| puts MasterAddressTracker.getMasterAddress(zk).getHostname |
| ensure |
| zk.close |
| end |
