Logstash Agent init script

gistfile1.sh

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

logstash_bin="java -Djava.net.preferIPv4Stack=true -jar /opt/logstash/logstash-1.0.11pre-monolithic.jar"
logstash_log="/opt/logstash/logstash-agent.log"
logstash_conf="/etc/logstash/logstash.conf"
NICE_LEVEL="-n 19"
PID_FILE="/opt/logstash/logstash-agent.pid"

find_logstash_process () {
    if [ -f $PID_FILE ]; then
	PID=`cat $PID_FILE`
    else
    	PIDTEMP=`ps ux | grep logstash | grep java | grep agent | awk '{ print $2 }'`
    	# Pid not found
    	if [ "x$PIDTEMP" = "x" ]; then
    	    PID=-1
    	else
     	   PID=$PIDTEMP
	   echo "Warning: no PID file found, replacing"
	   # Recompose PID file, not sure if there's a better way of handling this
	   echo $PID > $PID_FILE
    	fi
    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} &
    sleep 1
    PID=`ps ux | grep logstash | grep java | grep agent | awk '{ print $2}'`
    if [ "x$PID" = "x" ]; then
	PID=-1
    fi

    if [ $PID -eq -1 ]; then
	echo "Logstash failed to start."
	exit 1
    else
	echo $PID > $PID_FILE
	echo "Started successfully, PID $PID"
	exit 0
    fi
}

stop () {
    find_logstash_process
    if [ "$PID" -ne "-1" ]; then
        kill $PID
	if [ "$?" -eq "0" ]; then
		echo "Logstash agent stopped successfully."
		rm -f $PID_FILE
	else
		echo "Logstash was not stopped."
	fi
    else
	echo "Couldn't find Logstash PID, is it running?"
    fi
}

case $1 in
start)
        start
        ;;
stop)
        stop
        exit 0
        ;;
reload)
        stop
        start
        ;;
restart)
        stop
        start
        ;;
status)
        find_logstash_process
	if [ $PID -gt 0 ]; then
	    if [ -d /proc/$PID ]; then
		echo "Running, PID $PID"
            	exit 0
	    else
		echo "Found PID file, but process does not exist.  Removing stale PID."
		rm -f $PID_FILE
	    fi
        else
	    echo "Not running."
            exit 1
	fi 
        ;;
*)
        echo $"Usage: $0 {start|stop|restart|reload|status}"
        RETVAL=1
esac
exit 0