[Pacemaker] Antwort: Re: Constraining clones per node

[Jens.Braeuer at rohde-schwarz.com]

> > My environment consists of multiple servers (~40), each with one or 
more
> > cpu-cores. I have two application-types called A and B (services like 
eg.
> > apache), that each use one cpu core. A is mission critical, B is 
optional.
> > So what i want to express is that there should be 20 A's and the 
remaining
> > cpu's may be used by B's. When a node executing A's fails, it is 
perfectly
> > ok to shut down B's to make cpu cores available for A's to be started.
> >
> > Any idea how to do this?
> 
> In pacemaker resources have a meta_attribute "priority". If there are 
not 
> enough nodes available ton run all resources the resources with higher 
> priority are run.
> 
> so make a clone of to start 20  times A. Resource A has a priority 
> of 20. Make a clone of B with B having a priority of 10.

Your suggestion is to do something like (xml totally untested and for sure 
with syntax-errors.. :-)

<clone id="A" clone-max="20" priority="20">
        ...
</clone>
<clone id="B clone-max="60" priority="10">
        ...
</clone>

Right?
But how do i constraint the sum of A and B's running on one node to the 
number of cpu-cores available? 

best regards,
Jens Braeuer
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