<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Check something like [community version] <a href="http://proxmox.com" class="">ProxMox</a> great way to administer your KVMs<div class=""><br class=""></div><div class="">/Steffen</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 7. dec. 2015, at 18.35, Lentes, Bernd <<a href="mailto:bernd.lentes@helmholtz-muenchen.de" class="">bernd.lentes@helmholtz-muenchen.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hi,<br class=""><br class="">i've been asking all around here a while ago. Unfortunately I couldn't<br class="">continue to work on my cluster, so I'm still thinking about the design.<br class="">I hope you will help me again with some recommendations, because when the<br class="">cluster is running changing of the design is not possible anymore.<br class=""><br class="">These are my requirements:<br class=""><br class="">- all services are running inside virtual machines (KVM), mostly databases<br class="">and static/dynamic webpages<br class="">- I have two nodes and would like to have some vm's running on node A and<br class="">some on node B during normal operation as a kind of loadbalancing<br class="">- I'd like to keep the setup simple (if possible)<br class="">- availability is important, performance not so much (webpages some<br class="">hundred requests per day, databases some hundred inserts/selects per day)<br class="">- I'd like to have snapshots of the vm's<br class="">- live migration of the vm's should be possible<br class="">- nodes are SLES 11 SP4, vm's are Windows 7 and severable linux<br class="">distributions (Ubuntu, SLES, OpenSuSE)<br class="">- setup should be extensible (add further vm's)<br class="">- I have a shared storage (FC SAN)<br class=""><br class="">My ideas/questions:<br class=""><br class="">Should I install all vm's in one partition or every vm in a seperate<br class="">partition ? The advantage of one vm per partition is that I don't need a<br class="">cluster fs, right ?<br class="">I read to avoid a cluster fs if possible because it adds further<br class="">complexity. Below the fs I'd like to have logical volumes because they are<br class="">easy to expand.<br class="">Do I need cLVM (I think so) ? Is it an advantage to install the vm's in<br class="">plain partitions, without a fs ?<br class="">It would reduce the complexity further because I don't need a fs. Would<br class="">live migration still be possible ?<br class=""><br class="">snapshots:<br class="">I was playing around with virsh (libvirt) to create snapshots of the vm's.<br class="">In the end I gave up. virsh explains commands in its help, but when you<br class="">want to use them you get messages<br class="">like "not supported yet", although I use libvirt 1.2.11. This is<br class="">ridiculous. I think I will create my snapshots inside the vm's using lvm.<br class="">We have a network based backup solution (Legato/EMC) which saves the disks<br class="">every night.<br class="">Supplying a snapshot for that I have a consistent backup. The databases<br class="">are dumped with their respective tools.<br class=""><br class="">Thanks in advance.<br class=""><br class=""><br class="">Bernd<br class=""><br class="">--<br class="">Bernd Lentes<br class=""><br class="">Systemadministration<br class="">institute of developmental genetics<br class="">Gebäude 35.34 - Raum 208<br class="">HelmholtzZentrum München<br class=""><a href="mailto:bernd.lentes@helmholtz-muenchen.de" class="">bernd.lentes@helmholtz-muenchen.de</a><br class="">phone: +49 (0)89 3187 1241<br class="">fax: +49 (0)89 3187 2294<br class=""><br class="">Wer Visionen hat soll zum Hausarzt gehen<br class="">Helmut Schmidt<br class=""><br class=""><br class=""><br class="">Helmholtz Zentrum Muenchen<br class="">Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH)<br class="">Ingolstaedter Landstr. 1<br class="">85764 Neuherberg<br class="">www.helmholtz-muenchen.de<br class="">Aufsichtsratsvorsitzende: MinDir'in Baerbel Brumme-Bothe<br class="">Geschaeftsfuehrer: Prof. Dr. Guenther Wess, Dr. Nikolaus Blum, Dr. Alfons Enhsen<br class="">Registergericht: Amtsgericht Muenchen HRB 6466<br class="">USt-IdNr: DE 129521671<br class=""><br class=""><br class="">_______________________________________________<br class="">Users mailing list: Users@clusterlabs.org<br class="">http://clusterlabs.org/mailman/listinfo/users<br class=""><br class="">Project Home: http://www.clusterlabs.org<br class="">Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf<br class="">Bugs: http://bugs.clusterlabs.org<br class=""></div></div></blockquote></div><br class=""></div></body></html>