Debian Wheezy Logstash Shipper Init Script

logstash_init

#! /bin/sh
#
#       /etc/rc.d/init.d/logstash-shipper
#
#       Starts Logstash as a daemon
#
# chkconfig: 2345 20 80
# description: Starts Logstash as a daemon
# pidfile: /var/run/logstash-shipper.pid

### BEGIN INIT INFO
# Provides: logstash
# Required-Start: $local_fs $remote_fs
# Required-Stop: $local_fs $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: S 0 1 6
# Short-Description: Logstash-Shipper
# Description: Starts Logstash-Shipper as a daemon.
# Modified originally from https://gist.github.com/2228905#file_logstash.sh

### END INIT INFO

# Amount of memory for Java
JAVAMEM=32M

# Location of logstash files
LOCATION=/etc/logstash

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
DESC="Logstash Shipper Daemon"
NAME=logstash-shipper
DAEMON=$(which java)
CONFIG_DIR=${LOCATION}/shipper.conf
LOGDIR=/var/log/logstash
LOGFILE=${LOGDIR}/${NAME}.log
JARNAME=logstash.jar
ARGS="-Xmx$JAVAMEM -Xms$JAVAMEM -jar ${JARNAME} agent -f ${CONFIG_DIR}"
#ARGS="-jar ${JARNAME} agent -f ${CONFIG_DIR}"
SCRIPTNAME=/etc/init.d/${NAME}
PIDFILE=/var/run/${NAME}.pid
base=${NAME}

mkdir -p ${LOGDIR}
# Exit if the package is not installed
if [ ! -x "$DAEMON" ]; then
{
  log_end_msg "Couldn't find $DAEMON"
}
fi

. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
  cd $LOCATION && \
  ($DAEMON $ARGS &) >> ${LOGFILE} 2>&1 \
  && log_success_msg "Started ${NAME}" || log_failure_msg "Failed to start ${NAME}"
}

set_pidfile()
{
  pgrep -f "$DAEMON[[:space:]]*$ARGS" > $PIDFILE
}

#
# Function that stops the daemon/service
#
do_stop()
{
  pid=`cat $PIDFILE`
  if kill -0 $pid >/dev/null; then
    # TERM first, then KILL if not dead
       kill -TERM $pid >/dev/nul
       sleep 1
       if kill -0 $pid >/dev/null 2>&1 && sleep 1 &&
          kill -0 $pid >/dev/null 2>&1 && sleep $delay &&
          kill -0 $pid >/dev/null 2>&1 ; then
            kill -KILL $pid >/dev/null
            usleep 1
       fi
  fi
  kill -0 $pid > /dev/null 2>&1
  RC=$?
  if [ "$RC" -eq 0 ]; then
        log_failure_msg "${NAME} was not shutdown"
  else
        rm -f /var/lock/subsys/$JARNAME
        rm -f ${PIDFILE}
        log_success_msg "${NAME} was shutdown"
  fi

}

do_status()
{
        pid=`cat ${PIDFILE}`
        kill -0 ${pid}
        RC=$?
        if [ "${RC}"  -eq 0 ]; then
                log_success_msg "${NAME} is running"
        else
                rm -f ${PIDFILE}
                log_failure_msg "${NAME} is not running and may have crashed"
        fi
}

case "$1" in
  start)
    echo "Starting $DESC: "
    do_start
    touch /var/lock/subsys/$JARNAME
    set_pidfile
    ;;
  stop)
    echo "Stopping $DESC: "
    do_stop
    ;;
  restart|reload)
    echo "Restarting $DESC: "
    do_stop
    do_start
    touch /var/lock/subsys/$JARNAME
    set_pidfile
    ;;
  status)
    if [ -f ${PIDFILE} ]; then
                do_status
        else
                log_failure_msg "${NAME} is not running or has no valid pid file"
        fi
    ;;
  *)
    log_failure_msg "Usage: $SCRIPTNAME {start|stop|status|restart}"
    ;;
esac

echo
exit 0