Pen is a load balancer daemon with a single point of failure which is made redundant with Vrrpd. Below is an example Init Script for Fedora / RedHat style init scripts:
#!/bin/bash
#
# production Starts production service.
#
#
# chkconfig: 2345 12 88
# description: Production daemon for LVPHA (Linux Vrrp Pen High Availability) \
# A redundant and load balanced TCP clustering stab
### BEGIN INIT INFO
# Provides: $production
### END INIT INFO
# Source function library.
. /etc/init.d/functions
. /data/etc/profile
RETVAL=0
start() {
echo -n $"Starting up vrrpd and pen: "
if [ -e /var/lock/subsys/production ]; then
if [ -e /var/run/pen.pid ] && [ -e /var/run/vrrpd*.pid ] && [ -e /proc/`cat /var/run/vrrp*.pid` ] && [ -e /proc/`cat /var/run/pen.pid` ] ; then
echo -n $"cannot start production: production is already running.";
failure $"cannot start production: production already running.";
echo
return 1
fi
fi
/sbin/runpen
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/production
return $RETVAL
}
stop() {
killproc vrrpd && killproc pen
echo -n $"Shutting down vrrpd and pen: "
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/production
return $RETVAL
}
rhstatus() {
status vrrpd
status pen
}
restart() {
stop
start
}
case "$1" in
start)
start
;;
stop)
stop
;;
status)
rhstatus
;;
restart)
restart
;;
*)
echo $"Usage: $0 {start|stop|status|restart}"
exit 2
esac
exit $?
