[Pacemaker] DRBD primary/primary

[Nicholas Dronen]

Hi, Florian:

I don't think that suggestion appeals to me. :-)

Any idea how much work it is to change the OCF RA to reliably support
master_max=2?

Regards,

Nick

On Fri, May 22, 2009 at 2:48 AM, Florian Haas <florian at linbit.com> wrote:

> On 05/21/2009 11:12 PM, Nicholas Dronen wrote:
> > Hi:
> >
> > The wiki says that DRBD primary/primary isn't supported yet:
> >
> >     http://clusterlabs.org/wiki/DRBD_HowTo_1.0
> >
> > Is there a workaround?
>
> lmb and Dominik are probably going to hit me over the head with a 2x4
> for suggesting this, but until we finally fix the drbd OCF RA to
> reliably support master_max=2, here's a rather crude one:
>
> 1. Take DRBD out of your Pacemaker config altogether;
> 2. Enable "allow-two-primaries;" and "become-primary-on both;" in your
> drbd.conf.
> 3. Make sure the drbd service is started on system boot (chkconfig drbd
> on).
> 4. Make sure you configure and enable STONITH in your pacemaker config.
> 5. Utilize your DRBD resource as you would a shared storage device.
>
> No warranty of any kind. :)
>
> Cheers,
> Florian
>
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