[Pacemaker] General question about pacemaker

[Florian Haas]

On 06/10/12 22:21, Arnold Krille wrote:
> On 10.06.2012 21:48, Florian Haas wrote:
>> However, why do you want automatic failback? If your cluster nodes are
>> interchangeable in terms of performance, you shouldn't need to care
>> which node is the master. In other words the concept of having a
>> "preferred master" is normally moot in well-designed clusters.
> 
> One of the things on our road-map is providing some of our customers
> with a two-node cluster that in normal operations does load-balancing
> (simply by having two vm each for half of the samba-resources based on
> two (or more) drbd-resources). Then normally the vms would run each on
> one node and only in case of an error both run on one node. Then you
> want the resources to fall back to distributed location when all is well
> again.
> I tried this once with an anti-colocation but I don't know if that is
> easy to set up also with drbd-masters. That probably requires a well
> adjusted value for the anti-colocation to get it between the master- and
> slave-scores of drbd-master...

Yes. I would call that pretty tricky. :)

Cheers,
Florian

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