HBASE-12032 Script to stop regionservers via RPC (Patrick White)

bin/shutdown_regionserver.rb

@@ -0,0 +1,52 @@
+#
+# 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.
+#
+
+# This script is used to issue a stop command to a regionserver via RPC.
+# Intended for use in environments where sshing around is inappropriate
+# Run it like this by passing it to a jruby interpreter:
+#
+#  ./bin/hbase org.jruby.Main bin/shutdown_regionserver.rb c2021:16020
+
+include Java
+import org.apache.hadoop.hbase.HBaseConfiguration
+import org.apache.hadoop.hbase.client.HBaseAdmin
+
+def usage(msg=nil)
+  $stderr.puts 'Usage: shutdown_regionserver.rb <host:port>..'
+  $stderr.puts
+  $stderr.puts 'Stops the specified regionservers via RPC'
+  $stderr.puts 'Error: %s' % msg if msg
+  abort
+end
+
+usage if ARGV.length < 1
+
+ARGV.each do |x|
+  usage 'Invalid host:port: %s' % x unless x.include? ':'
+end
+
+config = HBaseConfiguration.create()
+begin
+  admin = HBaseAdmin.new(config)
+rescue
+  abort "Error: Couldn't instantiate HBaseAdmin"
+end
+
+ARGV.each do |hostport|
+  admin.stopRegionServer(hostport)
+end