[ClusterLabs] can't start/stop a drbd resource with pacemaker

[Lentes, Bernd]

----- On Jul 18, 2016, at 4:04 PM, Ken Gaillot kgaillot at redhat.com wrote:


>> 
>> Is there a way to manipulate the scores ? Is the score -INFINITY because the
>> resource is stopped
>> or is the resource stopped because the score is -INFINITY ?
> 
> Yes, yes and yes ;-)
> 
> You can manipulate the scores in the configuration. The different
> high-level tools (crm, pcs, etc.) have their own syntax for specifying
> scores, but each constraint has a score, and resource stickiness is a
> score. The cluster sums up all the scores that apply to a given resource
> per node, and places the resource on the node with the highest score.
> 
> From the cluster's point of view, the resource is stopped because the
> score is negative on all nodes.
> 
> However, the crm command's syntax uses "stop" and "start" indirectly.
> "crm stop" (and "pcs resource disable") simply adds constraints with
> negative scores to all nodes, to make the cluster stop the resource.
> "crm start" (and "pcs resource enable") simply removes those
> constraints. So, from the point of view of using crm, "stopping" the
> resource creates the negative scores, which then makes the cluster
> actually stop the resource.
> 

Hi Ken,

thanks for your help.

Can i edit them directly ? Or do i have to make a circuit with constraints ?
Is pcs available for Suse SLES 11 SP4 ?
I searched for it but didn't find it.
Is it a good idea to use pcs because i read crm is deprecated ?

Bernd
 

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