[ClusterLabs] a newbie --question

Simon Lawrence simon.lawrence at navaho.co.uk
Tue Sep 15 10:44:06 EDT 2015

On 15/09/15 14:22, ‪H Yavari‬ ‪ wrote:
> Hi,
> I'm newbie to pacemaker. So I don't know about all features.
> My question : I have 4 servers, 2 servers are appY(active and standby) 
> and 2 servers are appZ (active and standby).
> I want implement HA with Pacemaker, So I can do this for AppY and AppZ 
> now (with following the tutorials). But my issue is that my servers 
> must be pair. I mean :
> Pair#1 :AppY (active) + AppZ(active)
> and
> Pair#2 :AppY(standby) + AppZ(standby)
> So when any servers in pair#1 is failed, other pair goes active.
> it is possible ? How can I achieve this with configurations?
> Thanks.
> Regards,
> H.Yavari

You can use 'location constraints' within Pacemaker to define preferred 
nodes for resources' (applications in your case) to run, and also to 
define which nodes a resource cannot run on. So, yes you can do what you 

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