[Linux-HA] Colocation of promoted DRBD resources

[Andrew Beekhof]

On 10/29/07, Remigiusz Stachura <remigiusz.stachura at gmail.com> wrote:
> Hi,
> I have a two-node cluster that has more then 2 multi-state drbd
> resources on each node. All these resources must be promoted
> to master state on the same node because they creates a filesystem for
> Xen DomU. Xen will never migrate so I use DRBD 7.x and the most fresh
> HA 2.1.2-15 working on SLES10 SP1.
> I have created configuration included as a cib2.xml which mainly do what I want.
> (for testing only there are 2 drbd resources and IPaddr resource - not
> Xen resource)
>
> My problem is I wasn't able to create rule which make:
>
> -if one of the drbd resources fail on the primary node, all of them
> should be on the secondary node promoted to master before starting
> there Xen.

did you try a colocation constraint with from_role and to_role both
set to Master?

>
> How can I create such rules?
> Could you give same examples?
>
> thanks in advance
>
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>