>>> Kristoffer Grönlund <[email protected]> schrieb am 11.04.2017 um 15:30 in Nachricht <[email protected]>: > Hi all, > > I discovered today that a location constraint with score=INFINITY > doesn't actually restrict resources to running only on particular > nodes. From what I can tell, the constraint assigns the score to that > node, but doesn't change scores assigned to other nodes. So if the node > in question happens to be offline, the resource will be started on any > other node.
This makes sense IMHO: Otherwise the resource would not run at all. Obviously the infinity score for a node means: "Whenever this node is available, run the resource there (other rules not forbidding)". If you want to run the resource nowhere else, you'd add a -INFINITY score on the other nodes, I guess. > > Example: > > <rsc_location id="dummy-on-node2" rsc="dummy" score="INFINITY" node="node2"/> > > If node2 is offline, I see the following: > > dummy (ocf::heartbeat:Dummy): Started node1 > native_color: dummy allocation score on node1: 1 > native_color: dummy allocation score on node2: -INFINITY > native_color: dummy allocation score on webui: 0 > > It makes some kind of sense, but seems surprising - and the > documentation is a bit unclear on the topic. In particular, the > statement that a score = INFINITY means "must" is clearly not correct in > this case. Maybe the documentation should be clarified for location > constraints? > > -- > // Kristoffer Grönlund > // [email protected] > > _______________________________________________ > Users mailing list: [email protected] > 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 _______________________________________________ Users mailing list: [email protected] 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
