formula-fabio/fabio/files/fabio.sysvinit
2018-05-17 17:36:29 -04:00

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#!/bin/bash
#
# fabio Manage the fabio agent
#
# chkconfig: 2345 95 95
# description: fabio is a tool for service discovery and configuration
# processname: fabio
# config: /etc/fabio.conf
# pidfile: /var/run/fabio.pid
### BEGIN INIT INFO
# Provides: fabio
# Required-Start: $local_fs $network
# Required-Stop:
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Manage the fabio agent
# Description: fabio is a tool for service discovery and configuration
### END INIT INFO
# source function library
. /etc/rc.d/init.d/functions
prog="fabio"
exec="/usr/local/bin/$prog"
pidfile="/var/run/$prog.pid"
lockfile="/var/lock/subsys/$prog"
logfile="/var/log/$prog"
confdir="/etc/fabio.d"
# pull in sysconfig settings
[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
user=${fabio_USER:-fabio}
group=${fabio_GROUP:-fabio}
export GOMAXPROCS=${GOMAXPROCS:-2}
start() {
[ -x $exec ] || exit 5
[ -d $confdir ] || exit 6
umask 077
touch $logfile $pidfile
chown "$user:$group" $logfile $pidfile
echo -n $"Starting $prog: "
## holy shell shenanigans, batman!
## daemon can't be backgrounded. we need the pid of the spawned process,
## which is actually done via runuser thanks to --user.
## you can't do "cmd &; action" but you can do "{cmd &}; action".
## fabio 0.2.1 added -pid-file; although the following creates $pidfile
## owned by fabio:fabio, using -pid-file results in a permission error.
daemon \
--pidfile=$pidfile \
--user="$user" \
" { $exec agent -config-dir=$confdir &>> $logfile & } ; echo \$! >| $pidfile "
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch $lockfile
echo -n $"Waiting for fabio ready: "
## wait up to 60s for the rpc port to become listened-upon
## fabio 0.2.1 got much slower to start!
count=0
ready=0
pid=$( cat ${pidfile} )
while checkpid ${pid} && [ $count -lt 60 ] && [ $ready -ne 1 ]; do
count=$(( count + 1 ))
if netstat -lptn | egrep -q ":8400.*LISTEN +${pid}/" ; then
ready=1
else
sleep 1
fi
done
if [ $ready -eq 1 ]; then
RETVAL=0
success
else
RETVAL=1
failure
fi
echo
return $RETVAL
}
stop() {
echo -n $"Shutting down $prog: "
## graceful shutdown with leave
$exec leave &> /dev/null
RETVAL=$?
## wait up to 10s for the daemon to exit
if [ $RETVAL -eq 0 ]; then
count=0
stopped=0
pid=$( cat ${pidfile} )
while [ $count -lt 10 ] && [ $stopped -ne 1 ]; do
count=$(( count + 1 ))
if ! checkpid ${pid} ; then
stopped=1
else
sleep 1
fi
done
if [ $stopped -ne 1 ]; then
RETVAL=125
fi
fi
if [ $RETVAL -eq 0 ]; then
success
rm -f $lockfile $pidfile
else
failure
fi
echo
return $RETVAL
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading $prog: "
killproc -p $pidfile $exec -HUP
echo
}
force_reload() {
restart
}
rh_status() {
status -p "$pidfile" -l $prog $exec
RETVAL=$?
[ $RETVAL -eq 0 ] && $exec members
return $RETVAL
}
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 $?