Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello Robert, Thank you very much for the answer. Hmm, I just love the way drbd is giving me LVM partitions to my virtual guests, but if it's not possible in a three node setup I might need to think different. This is a development cluster, otherwise I would go for a real SAN solution anyway. Thanks a lot ---------------------------------- Bjorn Enroth bjorn.enroth at comnia.se +46 8 53338400 (direct) +46 70 3118400 (cell) Comnia Internet AB http://www.comnia.se +46 8 55002540 (phone) +46 8 55002541 (fax) 16 apr 2012 kl. 09:29 skrev Robert.Koeppl at knapp.com: > > IIRC three active nodes are not supported by DRBD. > You will have to resort to a shared storage solution. I am not entirely sure if a NFS-Server managed by Pacemaker with a backing DRBD would be fast enough and how well KVM handles the outage in case of a failover of the Cluster. > In this Environment you would have two dedicated servers for the storage-cluster and combine them with a bunch of "pizzaboxes" that run the Virtual Machines in another pacemaker cluster. As a decent storage backend (bunch of 15k SAS-drives, Raid-controller+BBU) easily costs much more than those small servers you might even get away with about the same cost - depending on the number of disks you had planned for your cluster. > Mit freundlichen Grüßen / Best Regards > > Robert Köppl > > Customer Support & Projects > Teamleader IT Support > > KNAPP Systemintegration GmbH > Waltenbachstraße 9 > 8700 Leoben, Austria > Phone: +43 3842 805-322 > Fax: +43 3842 82930-500 > robert.koeppl at knapp.com > www.KNAPP.com > > Commercial register number: FN 138870x > Commercial register court: Leoben > > The information in this e-mail (including any attachment) is confidential and intended to be for the use of the addressee(s) only. If you have received the e-mail by mistake, any disclosure, copy, distribution or use of the contents of the e-mail is prohibited, and you must delete the e-mail from your system. As e-mail can be changed electronically KNAPP assumes no responsibility for any alteration to this e-mail or its attachments. KNAPP has taken every reasonable precaution to ensure that any attachment to this e-mail has been swept for virus. However, KNAPP does not accept any liability for damage sustained as a result of such attachment being virus infected and strongly recommend that you carry out your own virus check before opening any attachment. > > > Björn Enroth <bjorn at comnia.com> > Gesendet von: drbd-user-bounces at lists.linbit.com > 16.04.2012 09:09 > > An > drbd-user at lists.linbit.com > Kopie > Thema > [DRBD-user] Three node cluster? > > > > > > Guys, > I am looking for information of how to deal with a KVM three node cluster with DRBD > > I have a "baby machine" ubuntu 11.10 pacemaker/drbd cluster with two nodes, local disks with drbd setup in between. This is working flawless. > > My challenge now is that I want to add a third node with the same setup. How do I handle drbd in this setup? I'd like to have all nodes active, to be able to migrate resources, mainly kvm virtual guests, around the cluster as I see fit. I'd also like pacemaker to be able to dynamically handle the load. > > I've been surfing' around for a while... Either I am not able to find the right information, or it is so obvious how to handle this so I am missing the point somewhere. Or, in worst case, this is not possible and I need to enter another route to make this work as I want. > > Any ideas? > > Thanks a lot in advance for your patience with me > > > > > > ------------------- > Björn Enroth > Comnia Internet AB > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20120416/808834fb/attachment.htm>