[Pacemaker] Avoid monitoring of resources on nodes

[David Vossel]

----- Original Message -----
> Daniel Dehennin <daniel.dehennin at baby-gnu.org> writes:
> 
> > Hello,
> 
> Hello,
> 
> > I have a 4 nodes cluster and some resources are only installed on 2 of
> > them.
> >
> > I set cluster asymmetry and infinity location:
> >
> >     primitive Mysqld upstart:mysql \
> >     	op monitor interval="60"
> >     primitive OpenNebula-Sunstone-Sysv lsb:opennebula-sunstone \
> >     	op monitor interval="60"
> >     primitive OpenNebula-Sysv lsb:opennebula \
> >     	op monitor interval="60"
> >     group OpenNebula Mysqld OpenNebula-Sysv OpenNebula-Sunstone-Sysv \
> >     	meta target-role="Started"
> >     location OpenNebula-runs-on-Frontend OpenNebula inf: one-frontend
> >     property $id="cib-bootstrap-options" \
> >     	dc-version="1.1.10-42f2063" \
> >     	cluster-infrastructure="corosync" \
> >     	symmetric-cluster="false" \
> >     	stonith-enabled="true" \
> >     	stonith-timeout="30" \
> >     	last-lrm-refresh="1416817941" \
> >     	no-quorum-policy="stop" \
> >     	stop-all-resources="off"
> >
> > But I have a lot of failing monitoring on other nodes of these resources
> > because they are not installed on them.
> >
> > Is there a way to completely exclude the resources from nodes, even the
> > monitoring?

actually, this is possible now. I am unaware of any configuration tools (pcs or
crmsh) that support this feature yet though. You might have to edit the cib xml
manually.

There's a new 'resource-discovery' option you can set on a location constraint
that help prevent resources from ever being started or monitored on a node.

Example: never start or monitor the resource FAKE1 on 18node2.

<rsc_location id="location-FAKE1-18node2" node="18node2" resource-discovery="never" rsc="FAKE1" score="-INFINITY"/>

There are more examples in this regression test.
https://github.com/ClusterLabs/pacemaker/blob/master/pengine/test10/resource-discovery.xml#L99

-- Vossel


> This cause troubles on my setup, as resources fails, my nodes are all
> fenced.
> 
> Any hints?
> 
> Regards.
> --
> Daniel Dehennin
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