init.d/logstash on amazon linux in ec2

logstash

# description: logstash 

# Source function library.
. /etc/init.d/functions

RETVAL=0
prog="logstash"
PIDFILE=/var/run/$prog.pid
LOCKFILE=/var/lock/subsys/$prog
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="logstash"
LS_HEAP_SIZE="4g"
DAEMON_HOME="/home/ec2-user/logstash-1.5.4/"
DAEMON="bin/logstash"
LOGSTASH_CONF="/etc/logstash.conf"
LOGSTASH_LOG="/var/log/logstash/logstash.log"
DAEMON_ARGS="-f ${LOGSTASH_CONF} --log ${LOGSTASH_LOG}"
SCRIPTNAME=/etc/init.d/logstash
#the user that will run the script
USER=ec2-user

#logstash_ver="1.5.4"
#logstash_bin="/home/ec2-user/logstash-$logstash_ver/bin/logstash"
#logstash_conf="/etc/logstash/logstash.conf"
#logstash_log="/var/log/logstash/$name.log"
#	command="/usr/bin/nice ${NICE_LEVEL} ${logstash_bin} -f $logstash_conf --log ${logstash_log}"
#echo "All value sets"

start() {
    if [ -f $PIDFILE ]; then
        PID=`cat $PIDFILE`
        if [ -z "`pgrep $PID`" ] && [ "$PID" != "`ps aux|grep -vE 'grep|runuser|bash'|grep -w "logstash"|awk '{print $2}'`" ]; then
            printf "%s\n" "Process dead but pidfile exists"
        else
            printf "$prog is already running!\n"
        fi
    else
        printf "%-50s" "Starting $prog ..."
	#echo  $DAEMON_HOME
        cd $DAEMON_HOME
	#echo  "$DAEMON_ARGS"
        $DAEMON $DAEMON_ARGS >/dev/null 2>&1 &
        sleep 5 
        PID=`ps aux|grep -vE 'grep|runuser|bash'|grep -w logstash|grep java|grep logstash/runner.rb|awk '{print $2}'`
        if [ -z "$PID" ]; then
            printf "[ \e[31mFAIL\033[0m ]\n"
        else
            echo $PID > $PIDFILE
            printf "[ \e[32mOK\033[0m ]\n"
        fi
    fi
}

stop() {
    printf "%-50s" "Shutting down $prog:"
    if [ -f $PIDFILE ]; then
        PID=`cat $PIDFILE`
        kill -s 9 $PID 2>/dev/null
        printf "[ \e[32mOK\033[0m ]\n"
        rm -f $PIDFILE
    else
        printf "[ \e[31mFAIL\033[0m ]\n" 
    fi
}

check_status() {
    printf "%-50s" "Checking $prog ..."
    if [ -f $PIDFILE ]; then
        PID=`cat $PIDFILE`
        if [ -z "`pgrep $PID`" ] && [ "$PID" != "`ps aux|grep -vE 'grep|runuser|bash'|grep -w logstash|awk '{print $2}'`" ]; then
            printf "%s\n" "Process dead but pidfile exists"
        else
            printf "[ \e[32mRUNNING\033[0m ]\n"
        fi
    else
        printf "[ \e[31mSTOPPED\033[0m ]\n"
    fi
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    status)
        check_status
        ;;
    restart)
        stop
        start
        ;;
    *)
        echo "Usage: $prog {start|stop|status|restart}"
        exit 1
        ;;
esac
exit 1