Hi Lars, no you're not missing something. I just intermixed two acceptable solutions and the way I asked for it.
So, for letting the resources stay where they are, you're absolutly right. For a solution where I like to push a certain resource to the new node (this service interruption doesn't hurt too much) while being sure that the other gets started on the newly upcoming node I have to balance the stickiness and negative constraint scores. Therefore I would like to see the simulated scores. Thank you for answering. Best regards Andreas Mock -----Ursprüngliche Nachricht----- Von: Lars Marowsky-Bree [mailto:l...@suse.com] Gesendet: Donnerstag, 19. September 2013 11:08 An: The Pacemaker cluster resource manager Betreff: Re: [Pacemaker] Solving a resource allocation problem On 2013-09-19T10:20:07, Andreas Mock <andreas.m...@web.de> wrote: > Hi all, > > I need a hint how to solve a resource allocation problem > on a two node cluster (pmck 1.1.11). > > I have two resource blocks (some stacked resources colocation inf) > which shall run on seperate nodes. I did this with a small negativ > colocation constraint. This works so far. > > But now I want to achieve the following. When one node is > brought down all resources are moved correctly. But when I > bring that node up again, than all resources which where > on that node are pushed back because of that negative colocation. > > I would like the cluster to leave the resources on that one node > and manually migrate (rebalance) the resources avoiding another > interrupt of service. Right, so your anti-colocation constraint is not actually a hard requirement, you want it to be optional - scatter resources if possible, but don't restart resources for it. You can do this using the utilization feature, placement-strategy="balanced" and resource-stickiness=inf. Or am I missing something still? Regards, Lars -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 21284 (AG Nürnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wilde _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
