I'll buy the first beer if someone else will take the notes. - Conor
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Andreas Mock > Sent: Wednesday, August 13, 2008 4:07 AM > To: General Linux-HA mailing list > Subject: Re: [Linux-HA] STONITH, default fencing time, forced-fencing > > Hi Andreas, > > > -----Ursprüngliche Nachricht----- > > Von: "Andreas Kurz" <[EMAIL PROTECTED]> > > Gesendet: 12.08.08 22:27:30 > > An: "General Linux-HA mailing list" <[email protected]> > > Betreff: Re: [Linux-HA] STONITH, default fencing time, > forced-fencing > > > > Of course ... one instance should be enough but isn't it > safer to make > > sure that every node is able to stonith any other node ... > no matter > > in which state the complete cluster is? > > > > I thought this too longtime ago. I ended also configuring > stonith as separate primitive resource for each node and > constraints forcing a sonith plugin not to run on its controlled node. > > Why this: In my case (and I'm pretty sure that's also valid > for other scenarios) the stonith device can only serve > exactly ONE connection. That means only one user/plugin can > connect to the stonith device at a time. As soon as I used > clones I couldn't guarantee that only one clone connects to > the stonith device at one time. The monitor action is > implemented as a connection attempt with gathering some more > or less meaningful status information. > I got many (wrong) monitoring failures. And therefore using > clones was not appropriate. > > Stonith plugin contributors should test and document if the > plugin is "clone-aware". > > Another issue is that on a two node cluster the usage of > clones where the clone instance running on the node it can't > shoot (suicide forbidden) is IMHO more or less the same as > using one primitive stonith ressource and an appropriate > constraint avoiding a wrong node/stonith assignment. > > By the way: I really never got the feeling to understand the > stonith subsystem and its behaviour more that 60%. Probably > I/we have to take Dejan for one or more beer and asking him > anything we don't know about this. :-)) > > 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 > _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
