> -----Ursprüngliche Nachricht----- > Von: "Andrew Beekhof" <[email protected]> > Gesendet: 16.02.09 11:23:53 > An: General Linux-HA mailing list <[email protected]> > Betreff: Re: [Linux-HA] Generell STONITH resource configuration question
Hi all, > > > > Just to get it right, I'm using IPMI as STONITH device. I have to set up > > two resources in a 2-Node cluster and add constraints in order to force > > each resource to run on a separate nodes. > > > > Is this approach correct? Anything else I need to worry about when > > creating the constraints / resources? > > You might be able to run it as a clone which would eliminate the need > for any constraints. I want to emphasis one issue. Some of the stonith devices (not stonith plugins) are not "cloneable". I don't know if it's true for IPMI but there are stonith devices which do allow only ONE connection at a time. With a "cloned" config you can NOT define that the status call to the stonith plugins shall be done in a controlled sequence. That means, IMHO, if you use a "cloned" config it can happen that both (2-node cluster) sides try to do the status operation at the same time. One of them can be rejected (=> bad status). We discussed this once and came to the conclusion that a stonith plugin developer should document if this plugin is "cloneable" reliably. Correct me if something changed the last months in the stonith subsystem which does falsify my "theory". Best regards Andreas Mock _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
