hbase/bin/graceful_stop.sh

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#!/usr/bin/env bash
#
#/**
# * Copyright 2011 The Apache Software Foundation
# *
# * 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.
# */
# Move regions off a server then stop it. Optionally restart and reload.
# Turn off the balancer before running this script.
function usage {
echo "Usage: graceful_stop.sh [--config <conf-dir>] [--restart [--reload]] [--thrift] [--rest] <hostname>"
echo " thrift If we should stop/start thrift before/after the hbase stop/start"
echo " rest If we should stop/start rest before/after the hbase stop/start"
echo " restart If we should restart after graceful stop"
echo " reload Move offloaded regions back on to the restarted server"
echo " debug Print helpful debug information"
echo " hostname Hostname of server we are to stop"
exit 1
}
if [ $# -lt 1 ]; then
usage
fi
bin=`dirname "$0"`
bin=`cd "$bin">/dev/null; pwd`
# This will set HBASE_HOME, etc.
. "$bin"/hbase-config.sh
# Get arguments
restart=
reload=
debug=
thrift=
rest=
while [ $# -gt 0 ]
do
case "$1" in
--thrift) thrift=true; shift;;
--rest) rest=true; shift;;
--restart) restart=true; shift;;
--reload) reload=true; shift;;
--debug) debug="--debug"; shift;;
--) shift; break;;
-*) usage ;;
*) break;; # terminate while loop
esac
done
# "$@" contains the rest. Must be at least the hostname left.
if [ $# -lt 1 ]; then
usage
fi
hostname=$1
filename="/tmp/$hostname"
# Run the region mover script.
echo "Disabling balancer! (if required)"
HBASE_BALANCER_STATE=`echo 'balance_switch false' | "$bin"/hbase --config ${HBASE_CONF_DIR} shell | tail -3 | head -1`
echo "Previous balancer state was $HBASE_BALANCER_STATE"
echo "Unloading $hostname region(s)"
HBASE_NOEXEC=true "$bin"/hbase --config ${HBASE_CONF_DIR} org.jruby.Main "$bin"/region_mover.rb --file=$filename $debug unload $hostname
echo "Unloaded $hostname region(s)"
# Stop the server. Have to put hostname into its own little file for hbase-daemons.sh
hosts="/tmp/$(basename $0).$$.tmp"
echo $hostname >> $hosts
if [ "$thrift" != "" ]; then
"$bin"/hbase-daemons.sh --config ${HBASE_CONF_DIR} --hosts ${hosts} stop thrift
fi
if [ "$rest" != "" ]; then
"$bin"/hbase-daemons.sh --config ${HBASE_CONF_DIR} --hosts ${hosts} stop rest
fi
"$bin"/hbase-daemons.sh --config ${HBASE_CONF_DIR} --hosts ${hosts} stop regionserver
if [ "$restart" != "" ]; then
"$bin"/hbase-daemons.sh --config ${HBASE_CONF_DIR} --hosts ${hosts} start regionserver
if [ "$thrift" != "" ]; then
# -b 0.0.0.0 says listen on all interfaces rather than just default.
"$bin"/hbase-daemons.sh --config ${HBASE_CONF_DIR} --hosts ${hosts} start thrift -b 0.0.0.0
fi
if [ "$rest" != "" ]; then
"$bin"/hbase-daemons.sh --config ${HBASE_CONF_DIR} --hosts ${hosts} start rest
fi
if [ "$reload" != "" ]; then
echo "Reloading $hostname region(s)"
HBASE_NOEXEC=true "$bin"/hbase --config ${HBASE_CONF_DIR} org.jruby.Main "$bin"/region_mover.rb --file=$filename $debug load $hostname
echo "Reloaded $hostname region(s)"
fi
fi
if [ $HBASE_BALANCER_STATE != "false" ]; then
echo "Restoring balancer state to " $HBASE_BALANCER_STATE
echo "balance_switch $HBASE_BALANCER_STATE" | "$bin"/hbase --config ${HBASE_CONF_DIR} shell &> /dev/null
fi
# Cleanup tmp files.
trap "rm -f "/tmp/$(basename $0).*.tmp" &> /dev/null" EXIT