[Pacemaker] Favor one node during stonith?

[Andrew Beekhof]

On 15 Aug 2014, at 4:02 am, Andrei Borzenkov <arvidjaar at gmail.com> wrote:

> В Thu, 14 Aug 2014 12:45:27 +1000
> Andrew Beekhof <andrew at beekhof.net> пишет:
> 
>>> 
>>> It statically assigns priorities to cluster nodes. I need to
>>> dynamically assign higher priority (lower delay) to a node that is
>>> currently running application to ensure that application survives. It
>>> was relatively easy in other cluster products I worked with, but I
>>> cannot figure out how to do it in pacemaker so far.
>> 
>> Its not something we have traditionally supported as it only really makes sense in a strict active/passive environment.
> 
> Not really - second node may run non-production applications that we do
> not really care about in case of split brain.
> 
> But thank you for confirming it is not me :)
> 
>> As soon as you have more than one node hosting resources, or hosting more than one resource, determining the priority quickly gets complicated.
>> 
>> Better to avoid split-brain in the first place.
>> Add a third node?  (Even if you don't allow it to run services).
>> That way when a node disappears, its almost certainly because its dead/failed.
>> 
> 
> I have to work with what I get ...

qdisk? a VM on some other server?
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