Logstash init script

logstash.sh

#! /bin/sh

### BEGIN INIT INFO
# Provides:          logstash-shipper
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start daemon at boot time
# Description:       Enable service provided by daemon.
### END INIT INFO

mode="shipper"
logstash_bin="/usr/bin/java -jar /usr/local/bin/logstash/logstash.jar"
logstash_conf="/etc/logstash/logstash.conf"
logstash_log="/var/log/logstash.log"
NICE_LEVEL="-n 19"

find_logstash_process () {
	PIDTEMP=`ps ux | grep logstash | grep java | grep $mode | awk '{ print $2 }'`
	# Pid not found
	if [ "x$PIDTEMP" = "x" ]; then
		PID=-1
	else
		PID=$PIDTEMP
	fi
}

start () {
	find_logstash_process
	if [ $PID -gt 0 ]; then
		echo "logstash $mode is already running"
		exit 0
	fi

	LOG_DIR=`dirname ${logstash_log}`
	if [ ! -d $LOG_DIR ]; then
		echo "Log dir ${LOG_DIR} doesn't exist. Creating"
		mkdir -p $LOG_DIR
	fi
	nohup nice ${NICE_LEVEL} ${logstash_bin} agent -f "/etc/logstash/logstash.conf" -l ${logstash_log} > ${logstash_log} &
}

stop () {
	find_logstash_process
	if [ $PID -ne -1 ]; then
		kill $PID
	fi
}

case $1 in
	start)
		start
		;;
	stop)
		stop
		exit 0
		;;
	reload)
		stop
		start
		;;
	restart)
		stop
		start
		;;
	status)
		find_logstash_process
		if [ $PID -gt 0 ]; then
			echo "Logstash $mode is running"
			exit 0
		else
			echo "Logstash $mode is not running"
			exit 1
		fi
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|reload|status}"
		RETVAL=1
esac

exit 0