[Pacemaker] 2 Node Cluster: some principal questions - addition

Lentes, Bernd bernd.lentes at helmholtz-muenchen.de
Thu Mar 22 10:52:58 EDT 2012


sorry, i forgot something. Is live-migration possible with the explained setup ?




i'd like to establish a 2 Node-Cluster. My OS will be SLES 11 and HAE. My services will run in VM's using KVM. I will install the VM's in LV's, one LV for one VM. The LV's will be plain partitions, having no filesystem. I have read this is quicker with KVM than installing a VM in a LV with filesystem.
My LV's will reside on a FC SAN. Both nodes have access to the SAN. For the LV's, i will use cLVM.

My questions are:

- let's assume that, due to an error, a VM will run on both nodes. Does cLVM prevent that both VM's have simultaneously access to the corresponding LV ? So that the data is not destroyed.

- Is it possible that some VM's run on the first node and other VM's run on the second node simultaneously ?

- what do you think about my setup ?


Bernd Lentes

Institut für Entwicklungsgenetik
HelmholtzZentrum münchen
bernd.lentes at helmholtz-muenchen.de
phone: +49 89 3187 1241
fax:   +49 89 3187 3826

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