[Pacemaker] limiting number of simultaneous acions for particular resource type

[Nikola Ciprich]

Hello everybody,
I'm trying to solve following issue:
I've got specific resource type (virtual machine in particular) which takes quite long to start/stop and those actions cause considerable load on hosting system. on my cluster we're running tens of instances of vm resources, and trying to shutdown pacemaker on node causes it trying to stop many of those resources in parallel, which causes heavy machine overload. Then operations start timing out and whole cluster goes nuts. Is it possible to set some kind of constraint so that not more than ie 2 parallel actions are executed in time for vm class resource? I can't group them using group resource, because some of those can have target-role set to stopped if they're not needed...
Or how can I at least set some global limit on number of simultaneous actions in general? If possible, I'd like to limit even the monitor actions so they run in serial if possible...
Thanks a lot in advance!
with best regards
nik

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Nikola CIPRICH
LinuxBox.cz, s.r.o.
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