So my plan had been to set up a pair of ProxMox hosts, use Ceph to do the shared storage and use HA so VMs could magically move around if a host died. However, I discovered Ceph and HA need a minimum of 3 hosts. HA can be done if you set up a Pi or some other 3rd host that can act as the 3rd vote in the event of a failure but as I didn't have Ceph I've not bothered trying.

I've read Ceph can work on 2 but not well or reliably.

I might setup a 3rd host some day but it seems a bit of a waste as I just don't need that amount of resources for what I'm running.

And I should have known really, I've a bit of a background in VMware, albeit at the enterprise level so I've never had to even think about 2 or 3 node clusters.