----- Original Message ----- > From: "Michael Schwartzkopff" <m...@sys4.de> > To: "The Pacemaker cluster resource manager" <pacemaker@oss.clusterlabs.org> > Sent: Monday, December 2, 2013 4:38:12 AM > Subject: Re: [Pacemaker] Fencing: Where? > > Am Montag, 2. Dezember 2013, 13:15:23 schrieb Nikita Staroverov: > > > Hi, > > > > > > as far as I unterstood RH is going to do all infrastructure in the cman > > > layer and user pacemaker only for resource management. Whith this setup > > > fencing also will be a job of the fenced of the cman package. > > > > > > This design has its advantages: If descisions are taked on a low level, > > > all > > > parts of the cluster have the chance to know about theses descisions. > > > > > > BUT: If pacemaker needs to fence a node, it has no possibility to so so > > > any > > > more. Imagine a resource will not stop and pacemaker would like to fence > > > that node to go on. How would that situation be handled with fencing in > > > cman? > > > > > > Is there any way pacemaker can tell cman about it's wish to fence an > > > other > > > nore? > > > > > > The only solution I can think of is to delegate the fencing in cman to > > > pacemaker. So both layers are able to fence. But this cannot be a good > > > solution, since we have to setup fencing on two places. > > > > > > Thanks for fruitful discussion. > > > > > > > > > Mit freundlichen Grüßen, > > > > > > Michael Schwartzkopff > > > > fence_pcmk does the job. Have you got any troubles with it? > > No. I use it now. But setting up fencing in two places > - cman -> links to pacemaker > - pamcemaker > > it not very nice to configure fencing in two places.
You aren't really configuring fencing devices in two places. The fence_pcmk device in cluster.conf is just telling 'fenced' to forward all its fencing requests to stonith-ng. This allows us to configure all the real fencing devices in one place now using pacemaker. -- Vossel > > Is there any way that pacemaker can tell cman about it's fencing descisions > > > > -- > Mit freundlichen Grüßen, > > Michael Schwartzkopff > > -- > [*] sys4 AG > > http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 > Franziskanerstraße 15, 81669 München > > Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 > Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer > Aufsichtsratsvorsitzender: Florian Kirstein > _______________________________________________ > 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 > _______________________________________________ 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
