Hi, thanks a lot for your reply. <div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">You need to setup a cluster with fencing, which will let you then use clustered LVM, clvmd, which in turn uses the distributed lock manager, dlm. This will allow for the same LVs to be seen and used across cluster nodes. </blockquote><div> Ok. I will try this. </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Then you will simply add the VMs as resources to rgmanager, which uses (and sits on top of) corosync, which is itself the core of the cluster. </blockquote><div> So each virtual machine will be a resource, is it right? </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> I'm guessing that you are using RHEL 6, so this may not map perfectly, but I described how to build a similar Xen-based HA VM cluster on EL5. The main differences are; Corosync instead of OpenAIS (changes nothing, configuration wise), ignore DRBD as you have a proper SAN and replace Xen with KVM. The small GFS2 partition is still recommended for central storage of the VM definitions (needed for migration and recovery). However, if you don't have a GFS2 license, you can manually keep the configs in sync on matching local directories on the nodes. See if this helps at all: <a href="http://wiki.alteeve.com/index.php/Red_Hat_Cluster_Service_2_Tutorial" target="_blank">http://wiki.alteeve.com/index.php/Red_Hat_Cluster_Service_2_Tutorial</a> </blockquote><div> Actually we are using SL6 but we probably will migrate to RHEL6 if this environment will be used as production infrastructure in the future. So we will consider GFS2. Thanks a lot for your answer. Marc </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Best of luck. :) -- Digimer E-Mail: <a href="mailto:digimer@alteeve.com">digimer@alteeve.com</a> Freenode handle: digimer Papers and Projects: <a href="http://alteeve.com" target="_blank">http://alteeve.com</a> Node Assassin: <a href="http://nodeassassin.org" target="_blank">http://nodeassassin.org</a> "At what point did we forget that the Space Shuttle was, essentially, a program that strapped human beings to an explosion and tried to stab through the sky with fire and math?" </blockquote> </div> -- Marc Caubet Serrabou PIC (Port d'Informació Científica) Campus UAB, Edificio D E-08193 Bellaterra, Barcelona Tel: +34 93 581 33 22 Fax: +34 93 581 41 10 <a href="http://www.pic.es" target="_blank">http://www.pic.es</a> Avis - Aviso - Legal Notice: <a href="http://www.ifae.es/legal.html" target="_blank">http://www.ifae.es/legal.html</a>