Proxmox – Tip of the Day

Running into a classic homelab / cluster problem lately…

My NVMe storage is completely full, which means I can’t migrate my VMs to another node in the cluster. Normally not a big deal until you need to reboot after a kernel update 😅

Right now, that’s exactly the situation: I should restart my Proxmox nodes, but without migration capability, that would mean downtime for running workloads. Not ideal.

To make it worse: with current NVMe prices, just “adding more storage” isn’t exactly a fun or cheap fix either…

As a temporary workaround, I’ve held back kernel updates to avoid forced reboots:

apt-mark hold proxmox-kernel-*

And when I’m ready again, I can simply re-enable updates with:

apt-mark unhold proxmox-kernel-*

Not a long term solution, but it buys me some time until I fix the storage bottleneck.

Looking ahead, I’m planning to move towards a Ceph setup.

Moral of the story: always plan more headroom than you think you need especially with NVMe in clustered environments.