Xen domUs on remote storage (iSCSI / NFS)
I'm tinkering with a Debian Xen dom0, curious about the ways I can host domUs. This is not production, I'm just learning.
I'm considering a setup that centralizes all irreplaceable data on a box running FreeNAS, which can export iSCSI or NFS. If I understand correctly, iSCSI would allow me to layer LVM on top, which is the preferred way to run domUs for flexibility and performance. NFS would be used if I did a file-based VM setup, which I consider second choice. The way I *think* it would work best: Code:
FreeNAS SAN In short: is there a standard or generally-accepted way to deploy Xen domUs to remote storage, all these considered? |
Maybe I've put some off with the whole "Xen domUs on a FreeNAS SAN" notion.
I suppose the heart of my question is "What are the best practices for deploying a Linux server running from a SAN?" From here I can flesh out my Xen question. |
What you're describing is certainly possible, but it's not too common to use LVM or similar technology on top of iSCSI on the hypervisor side. The LVM/iSCSI part is usually configured the other way around:
Code:
Storage system: If you let the VMs use iSCSI targets directly you can easily do live migration of VMs between hypervisor nodes. I don't think that's possible if the iSCSI device is part of an LVM setup on the hypervisor side. |
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