SysV init script for HAProxy

haproxy.init

#!/bin/sh
#
# haproxy tcp/http proxy daemon
#
# chkconfig:   <default runlevel(s)> <start> <stop>
# description: tcp/http proxy daemon, installed for ESG server proxy
#

### BEGIN INIT INFO
# Provides:
# Required-Start:
# Required-Stop:
# Should-Start:
# Should-Stop:
# Default-Start:
# Default-Stop:
# Short-Description:
# Description:
### END INIT INFO

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

exec="/usr/local/sbin/haproxy"
prog="haproxy"
config="/etc/haproxy/haproxy.cfg"
pidfile="/var/run/$prog.pid"

[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

start() {
    [ -x $exec ] || exit 5
    [ -f $config ] || exit 6
    echo -n $"Starting $prog: "
    # if not running, start it up here, usually something like "daemon $exec"
    $exec -f $config -D -p $pidfile
    retval=$?
    [ $retval -eq 0 ] && echo " started"
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    # stop it here, often "killproc $prog"
    for pid in `cat $pidfile`
    do
        /bin/kill $pid || return 4
    done
    retval=$?
    if [ $retval -eq 0 ]; then
        echo "  stopped"
        rm -f $pidfile
    fi
    return $retval
}

restart() {
    stop
    start
}

reload() {
    restart
}

force_reload() {
    restart
}

rh_status() {
    # run checks to determine if the service is running or use generic status
    if [ ! -f $pidfile ] ; then
        echo "# program not running"
        return 3
    fi

    for pid in $(cat $pidfile) ; do
        if ! ps --no-headers p "$pid" | grep haproxy > /dev/null ; then
            echo "# program running, bogus pidfile"
            return 1
        fi
    done

    echo "$prog is running"
    return 0
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}


case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
        restart
        ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
        exit 2
esac
exit $?

used Fedora template(http://fedoraproject.org/wiki/Packaging:SysVInitScript).
borrowed ubuntu package's pid handling.