this post was submitted on 30 May 2026
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[–] amateurcrastinator@lemmy.world 1 points 1 day ago (1 children)

I am not sure what you are talking about. I have a an hpc cluster at work that I manage and I set it up with proxmox. 13 nodes with various VMs. If there is no pci passthrough on a VM I can live migrate it on any node without stopping it.i am not using LXC there so I don't know if that can be done or not.

I have used ceph but we still don't have the proper infrastructure for it at the moment.

I am not sure what you are talking about.

i am not using LXC there so I don’t know if that can be done or not.

Yeah, it's an lxc thing man. Sounds like you exclusively work with KVMs so you wouldn't have come across it at all. They're containers that in the case of proxmox run using a bit of the host's files. LXD, a competing open source virtualization product, can run and live migrate LXCs. Proxmox devs know about the limitation at least as early as 2017 and in theory it's on some kind of extreme long running back-burner to enable LXC live migration.

My other VMs can migrate, though the storage thing can be a pain if you have a dissimilar node in the pool, but that's more of an engineering challenge. Proxmox does not hold your hand with practically anything and their manual pages offer scant advice in terms of best practice.