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Moving a Proxmoc 256 MB NVMe install to larger NVMe (lemmy.ml)

submitted 1 month ago by trilobite@lemmy.ml to c/selfhosted@lemmy.world

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Finally managed to get my hands on 2x1TB NVMe's. Budgets are tight these days ... :-) They are Crucial P310 ... hope they are reliable, although I suspect nowhere near Samsung stuff.

I have a little Proxmox installation running a VM on a 256GB NVMe, which as you can imagine is tight. Is there a way of cloning this installing on one of the new NVMes?

Reason why I have 2x new NVMe is that I want to eventually get myself to Proxmox HA, so that the two machines (two little Optiplex 5070, one of which has the 256GB install) provide me with redundancy.

First thing is to clone the 256GB install to the larger NVMe. Would it be an idea to go this way: a) install 1TB new NVMe on spare Optiplex b) install Proxmox on this new machine c) find a way to replicate the whole 256GB install on the second machine (need to read the docs to see if/how this can happen) d) once second machine is up and running as a clone, remove machine with 256GB (current machine) and install the 1TB NVMe. e) do the same above process the other way around.

Do you think this will work or am I going to hit a wall? Is there a simpler way of doing this?

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[–] felbane@lemmy.world 4 points 1 month ago* (last edited 1 month ago)

That depends on what level of HA you want to end up with.

If you want proper HA, you'll want to plan on adding a (small, like a Raspberry Pi) third node for quorum. If you are already taking backups and you just want "I can restore on the second system" then it's slightly simpler, but mostly the same process:

Setup new node, add to cluster
Migrate all VMs and LXCs to new node
Remove and upgrade other node
Add rebuilt node to cluster

If you're planning on proper HA, I'd strongly advise having the proxmox installation on a second small drive on each node and leaving your 1tb drives as data only.

This article half-explains one option for a two node setup (zfs replication), which is functional but not ideal. If you want to get your feet wet with Ceph then I can give you some pointers.