a basic init.d script for Logstash

logstash.sh

#! /bin/sh
#
# Logstash Start/Stop logstash
#
# chkconfig: 345 99 99
# description: Logstash
# processname: logstash

logstash_bin="/usr/bin/java -jar /opt/logstash/logstash-1.0.17-monolithic.jar"
logstash_conf="/etc/logstash/shipper.conf"
logstash_log="/var/log/logstash/logstash.log"
NICE_LEVEL="-n 19"

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

start () {
    LOG_DIR=`dirname ${logstash_log}`
    if [ ! -d $LOG_DIR ]; then
      echo "Log dir ${LOG_DIR} doesn't exist. Creating"
      mkdir $LOG_DIR
    fi
    nohup nice ${NICE_LEVEL} ${logstash_bin} agent -f ${logstash_conf} >  ${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
            exit 0
        else
            exit 1
    fi 
        ;;
*)
        echo $"Usage: $0 {start|stop|restart|reload|status}"
        RETVAL=1
esac
exit 0