Create service.sh

#!/bin/bash

PIDFILE="/var/run/agent.pid"

LOGFILE="/var/log/agent.log"

SCRIPT="/usr/local/bin/agent.sh" 

status() {

  if [ -f $PIDFILE ]; then

    echo 'Service running' >&2

    return 1

  fi

}

start() {

  if [ -f $PIDFILE ] && kill -0 $(cat $PIDFILE); then

    echo 'Service already running' >&2

    return 1

  fi

  printf 'Starting agent service...' >&2

  "$SCRIPT" &> "$LOGFILE" & echo $! > "$PIDFILE"

}

stop() {

  if [ ! -f "$PIDFILE" ] || ! kill -0 $(cat "$PIDFILE"); then

    echo 'Service not running' >&2

    return 1

  fi

  echo 'Stopping agent service' >&2

  kill -15 $(cat "$PIDFILE") && rm -f "$PIDFILE"

  echo 'Service stopped' >&2

}

case "$1" in

  start)

    start

    ;;

  stop)

    stop

    ;;

  status)

    status

    ;;

  restart)

    stop

    start

    ;;

  *)

    echo "Usage: $0 {start|stop|restart}"

esac