On 04/21/2017 04:38 AM, Lentes, Bernd wrote: > > > ----- On Apr 21, 2017, at 1:24 AM, Ken Gaillot kgail...@redhat.com wrote: > >> On 04/20/2017 02:53 PM, Lentes, Bernd wrote: > >> >> target-role=Stopped prevents a resource from being started. >> >> In a group, each member of the group depends on the previously listed >> members, same as if ordering and colocation constraints had been created >> between each pair. So, starting a resource in the "middle" of a group >> will also start everything before it. > > What is the other way round ? Starting the first of the group ? Will the > subsequent follow ?
Groups are generally intended to start and stop as a whole, so I would expect starting any member explicitly to lead the cluster to want to start the entire group, but I could be wrong, because only prior members are required to be started first. >> Everything in the group inherits this target-role=Stopped. However, >> prim_vnc_ip_mausdb has its own target-role=Started, which overrides that. >> >> I'm not sure what target-role was on each resource at each step in your >> tests, but the behavior should match that. >> > > I have to admit that i'm struggling with the meaning of "target-role". > What does it really mean ? The current status of the resource ? The status of > the resource the cluster should try > to achieve ? Both ? Nothing of this ? Could you clarify that to me ? "try to achieve" The cluster doesn't have any direct concept of intentionally starting or stopping a resource, only of a desired cluster state, and it figures out the actions needed to get there. The higher-level tools provide the start/stop concept by setting target-role. It's the same in practice, but the cluster "thinks" in terms of being told what the desired end result is, not what specific actions to perform. > > Thanks. > > > Bernd > > > Helmholtz Zentrum Muenchen > Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) > Ingolstaedter Landstr. 1 > 85764 Neuherberg > www.helmholtz-muenchen.de > Aufsichtsratsvorsitzende: MinDir'in Baerbel Brumme-Bothe > Geschaeftsfuehrer: Prof. Dr. Guenther Wess, Heinrich Bassler, Dr. Alfons > Enhsen > Registergericht: Amtsgericht Muenchen HRB 6466 > USt-IdNr: DE 129521671 _______________________________________________ Users mailing list: Users@clusterlabs.org http://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org