#! /bin/sh

### BEGIN INIT INFO
# Provides:		keepalived
# Required-Start: $remote_fs $syslog
# Required-Stop:  $remote_fs $syslog
# Default-Start:  3 5
# Default-Stop:   0 1 2 6
# Short-Description:	Start keepalived to manage IPVS & LVS
# Description:	Start keepalived to manage IPVS & LVS
### END INIT INFO


DAEMON='Keepalived daemon'
DAEMON_BIN='/usr/sbin/keepalived'
DAEMON_CONF='/etc/keepalived/keepalived.conf'
DAEMON_SYSCONF='/etc/sysconfig/keepalived'
DAEMON_PIDFILE='/var/run/keepalived.pid'
KEEPALIVED_OPTIONS='-d'
#DAEMON_USER="root"
SUPPORTS_HUP='yes'
# "yes" if exist next values in freshclam.conf
#       PidFile /var/run/keepalived.pid
#       DatabaseOwner root

pid_par=${DAEMON_PIDFILE:+"-p $DAEMON_PIDFILE"}
usr_par=${DAEMON_USER:+"-u $DAEMON_USER"}

test -x $DAEMON_BIN || { echo "$DAEMON_BIN not installed or executable";
    if [ "$1" = "stop" ]; then exit 0;
    else exit 5; fi; }


test -r $DAEMON_CONF || { echo "$DAEMON_CONF not existing or readable";
    if [ "$1" = "stop" ]; then exit 0;
    else exit 6; fi; }

# read sysconfig variables that might overwrite the daemon options
if [ -r "$DAEMON_SYSCONF" ]; then
   . "$DAEMON_SYSCONF"
fi

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num><num>
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status
. /etc/rc.status

# First reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signalling is not supported) are
# considered a success.

# remove empty pid files to avoid disturbing warnings by checkproc/killproc
# (these can occur if dhcpd does not start correctly)
test -e $DAEMON_PIDFILE && ! test -s $DAEMON_PIDFILE && rm $DAEMON_PIDFILE

case "$1" in
        start)
        echo -n "Starting $DAEMON "
        if test ! -f ${DAEMON_CONF}; then
            echo -n >&2 "Configuration file, ${DAEMON_CONF} does not exist. "
            rc_status -s
                exit 6
        fi
        checkproc $pid_par ${DAEMON_BIN}
        case $? in
            0) echo -n "- Warning: daemon already running. " ;;
            1) echo -n "- Warning: ${DAEMON_PIDFILE} exists. " ;;
        esac
#        echo "startproc $usr_par $pid_par ${DAEMON_BIN} ${KEEPALIVED_OPTIONS}"
        startproc $usr_par $pid_par ${DAEMON_BIN} ${KEEPALIVED_OPTIONS}
        rc_status -v
        ;;
    stop)
        echo -n "Shutting down $DAEMON "
        checkproc $pid_par ${DAEMON_BIN} || \
        echo -n " Warning: daemon not running. "
        killproc $pid_par -t 10 ${DAEMON_BIN}
        rc_status -v
        ;;
    try-restart|condrestart)
        if test "$1" = "condrestart"; then
            echo "${attn} Use try-restart ${done}(LSB)${attn} rather than condrestart ${warn}(RH)${norm}"
        fi
        $0 status
        if test $? = 0; then
            $0 restart
        else
            rc_reset
        fi
        rc_status
        ;;
    restart)
        $0 stop
        $0 start
        rc_status
        ;;
    force-reload|reload)
            if test "$SUPPORTS_HUP" = "yes"; then
                echo -n "Reload service $DAEMON "
            checkproc $pid_par ${DAEMON_BIN} && \
            touch ${DAEMON_PIDFILE} || \
            echo -n >&2 " Warning: daemon not running. "
            killproc $pid_par -HUP ${DAEMON_BIN}
                    rc_status -v
            else
                    $0 stop  &&  sleep 3  &&  $0 start
                    rc_status
            fi
            ;;
    status)
        echo -n "Checking for $DAEMON "
        checkproc $pid_par ${DAEMON_BIN}
        rc_status -v
        ;;
    probe)
        test ${DAEMON_CONF} -nt ${DAEMON_PIDFILE} && echo reload
        ;;
    *)
        echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe}"
        exit 1
        ;;
esac
rc_exit

