On 04/09/2013, at 6:18 AM, Lindsay Todd <rltodd....@gmail.com> wrote:
> We've been attempting to set up an asymmetric pacemaker cluster using remote > cluster nodes, with pacemaker 1.1.10 (actually, building from git lately, > currently at a4eb44f). We use location constraints to enable resources to > start on nodes they should start on, and rely on asymmetry to otherwise keep > resources from starting. You set symmetric-cluster=false or assumed that was the default > > But we get many monitor operation failures. > > Resource monitor operations run on the physical real hosts, and frequently > fail because not all the components are present on those hosts. For > instance, the mysql resource agent's monitor operation fails as "not > installed", since, well, mysql isn't installed on those systems, so the > validate operation, which most or every path through that agent runs, always > fails. I don't see failures on the remote nodes, even ones without mysql > installed. > > Previously I'd noticed LSB resources had failed monitor operations on systems > that didn't have the LSB init script installed. > > Presumably these monitor operations are happening to ensure the resource is > NOT running where it should not be??? Correct. Although with symmetric-cluster=false it shouldn't show up as an error. Logs? crm_mon output? > There doesn't seem to be a way to set up location constraints to prevent > this from happening, at least that I've found. I wrote an OCF wrapper RA to > help me with LSB init scripts, but not sure what to do about other RA's like > mysql short of maintaining my own version, unless there is a way to tune > where "monitor" runs. Or more likely I'm missing something ... > > It would seem to me that a "not installed" failure, OCF_ERR_INSTALLED, would > not really be an error on a node that shouldn't be running that resource > agent anyway, and is probably a pretty good indication that it isn't running. > > /Lindsay > > _______________________________________________ > 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
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