[Pacemaker] split brain in drbd dual primary setup

[Lars Ellenberg]

On Tue, Dec 08, 2009 at 09:24:57AM +0100, Andrew Beekhof wrote:
> On Mon, Dec 7, 2009 at 2:17 PM, unni krishnan <unnikrishnan.a at gmail.com> wrote:
> > Ok, one more doubt. How heartbeat + pacemaker is going to detect that
> > the drbd is in stand alone state. There is no cluster partition. Only
> > drbd is disconnected.
> 
> resource monitoring.
> i would assume the RA looks for this case

You need resource level fencing.
Have a look for fencing, the fence-peer handler,
and "crm-fence-peer.sh" in the DRBD User's Guide.

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.