You are absolutely right about the role of STONITH in all this. But: this doesn't change the fact that my services are stopped if the number of nodes that remains is below the quorum that is designed. I would really like to see that even if just one node remains, my services keep running anyway.
Sander > -----Oorspronkelijk bericht----- > Van: [EMAIL PROTECTED] [mailto:linux-ha- > [EMAIL PROTECTED] Namens Yan Fitterer > Verzonden: woensdag 27 juni 2007 14:43 > Aan: General Linux-HA mailing list > Onderwerp: Re: [Linux-HA] Quorum behavior > > STONITH. > > Second node fails: 3rd node takes over resources, but only after > verified power off (or restart) of 2nd node. > > Actually - same thing for 1st node. > > Challenge: Ensure that you don't lost network AND stonith at the same > time. > > Yan > > Sander van Vugt wrote: > > Hi list, > > > > > > > > Trying to think out a decent solution here, I run across the following. > I > > want to build a three node cluster where some services are running. Now > the > > following situation arises: I bring down one node for maintenance. > Shortly > > after that a second node fails. This causes the cluster to loose quorum. > The > > result? Just to be sure, the default "no_quorum_policy stop" causes the > > cluster to stop all resources completely! Second attempt: I switch the > > no_quorum policy to "ignore". The resource keeps on running, so I am > happy. > > However, in that situation, if the nodes that fails just has a network > > failure and can therefore no longer see the rest of the cluster, a > perfect > > split brain arises on which the failing node as well as the remaining > node > > both start offering the services. Rather uncool if these involve shared > file > > systems that are not cluster safe :-). Third scenario: I set no_quorum > > policy to " freeze". At least, the services continue running on the > > remaining node, but services that were somewhere else, don't fail over > > automatically, so: still no high availability. > > > > > > > > So my question: I want my services to continue running, even if a number > of > > nodes remain that is less than the quorum. Is there any way this can be > > organized? > > > > > > > > (Version used: 2.08 on SLES 10 sp1) > > > > > > > > Thanks, > > > > Sander > > > > > > > > _______________________________________________ > > 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 _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
