On 2013-10-03T12:22:27, David Vossel <dvos...@redhat.com> wrote: > > Is there some way to tell, node needs to be fenced using two fencing > > devices? Or I'll need to create my own fencing plugin allowing to > > use two fencing devices simultaneously? > Not simultaneously (not sure if that is actually a requirement), but in > serial this is possible.
Yes, for PDUs that connect to redundant power supplies, that is actually a requirement. If you have multiple ones (and stonith-action != "off"), the current code from pacemaker is, uhm, a bit unwieldy. > Take a look at fencing levels. > http://clusterlabs.org/doc/en-US/Pacemaker/1.1-pcs/html-single/Pacemaker_Explained/index.html#_advanced_fencing_configurations digimer wrote up an howto for this: http://clusterlabs.org/wiki/Fencing_topology I do think that if we want to support multiple devices per level like this, it ought to be simpler to configure. As in, pacemaker auto-expanding multiple devices with reset to "all off" (fencing fails if one doesn't succeed), then "all on" (fencing considered successful even if one failed). digimer's hack works, but it makes my eyes bleed. ;-) 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
