[Ocfs2-users] script for check drbd at mount ocfs2 at boot in debian

[Eduardo Diaz - Gmail]

Hi to all, I am mounting a simple cluster for use
mail/virtualbox/samba in two servers, in active/active mode (not for
virtualbox).

In my testings some times the drbd system needs wait some time for
start (sync protocols), or because some times the node are down many
days.

I create a script for wait for a sync, and check that the "ip of
interconect cluster" are up an running. and go up to ocfs2

for download:
www.adantra.es/temp/check_drbd.gz

I put the interesting code here because my goal is not for drbd
(usefully too) but the real use is for ocfs2 you can put you ocfs2 at
fstab with noauto option.

I put in my init scripts (the init is for debian but you can use easy
in many systems)...

I hope that the people find userfully (my bash scripting is not very
good..).. (sorry the coments are in spanish)...

===============================================================
#!/bin/bash

### BEGIN INIT INFO
# Provides:          check_drbd
# Required-Start:    $local_fs $network o2cb drbd
# Required-Stop:     $local_fs
# X-Start-Before:
# Default-Start:     2 3 4 5
# Default-Stop:      0 6
# Short-Description: Check the syn of filesystem drbd before mount
ocfs2 filesystems.
# Description: Check the syn of filesystem drbd before mount ocfs2 filesystems.
### END INIT INFO
# Version 1.0

IP_SYNC=192.168.2.1
# Resource number
RES=0
NET_INTERFACE=eth3
SLEEP=10
TIMEOUT=30
SLEEP_TIME=0
MOUNTPOINT="/datos/datosadantra"
#LOG="/bin/echo"
LOG="/usr/bin/logger"

if [ ! -f /proc/drbd ]; then
   $LOG "No esta arrancado DRBD..."
   exit 1
fi

case "$1" in
 start)
       # Inciando las comprobaciones
ESTADO_MIRROR=`/sbin/drbdadm dstate r$RES`
until [ "$ESTADO_MIRROR" == "UpToDate/UpToDate" ]; do
   ESTADO_CONEXION=`/sbin/drbdadm cstate r$RES`
   IP_ASIGNADA=`ifconfig $NET_INTERFACE | sed -n '/^[A-Za-z0-9]/
{N;/dr:/{;s/.*dr://;s/ .*//;p;}}'`
#   if [ "$ESTADO_CONEXION" == "WFConnection" ] && [ "$IP_ASIGNADA" !=
"$IP_SYNC" ]; then
   if [ "$IP_ASIGNADA" != "$IP_SYNC" ]; then
       $LOG "IP no asignada a la red, reiniciando la red";
       $LOG "Reiniciando la Network..."
       /sbin/ifconfig $NET_INTERFACE $IP_SYNC\/24 up
       /etc/init.d/drbd restart
       /etc/init.d/o2cb restart
   fi
   $LOG "Esperando a la sincronia del mirror $SLEEP_TIME seg de $TIMEOUT"
   sleep $SLEEP
   let "SLEEP_TIME=$SLEEP_TIME+$SLEEP"
   if (( $SLEEP_TIME > $TIMEOUT )) ; then
       $LOG "Demasiado tiempo esperando..."
       $LOG "Mandar mail..."
        exit 1     fi    ESTADO_MIRROR=`/sbin/drbdadm dstate
r$RES`doneESTADO_MIRROR=`/sbin/drbdadm role r$RES`if [
"$ESTADO_MIRROR" == "Secondary/Primary" ]; then        #Check that the
role are Primary/Primary        /sbin/drbdadm primary
r$RESfiESTADO_MIRROR=`/sbin/drbdadm role r$RES`if [ "$ESTADO_MIRROR"
!= "Primary/Primary" ]; then        # Make sure that the rola are
Primary/Primary        $LOG "El mirror no esta correcto no podemos
arrancar..."        exit 1fi
$LOG "El mirror esta Ok, podemos montar $MOUNTPOINT .."mount | grep
"$MOUNTPOINT";copia_ok=$?if [ "$copia_ok" == 0 ]; then       $LOG "No
montamos $MOUNTPOINT por que ya esta montado"       exit 1else
mount $MOUNTPOINT        copia_ok=$?        if [ "$copia_ok" != 0 ];
then                $LOG "No se ha podido montar $MOUNTPOINT"
      exit 1        else                $LOG "Montado del directorio
$MOUNTPOINT OK"        fifi        ;;
stop|reload|restart|force-reload)        # No hay nada que parar, solo
asegurarse que antes de arrancar el drbd esta sincronizado        ;;
*)        echo "Usage: $N {start|stop|restart|force-reload}" >&2
 exit 1        ;;esac
exit 0