Installing Proxmox VE on an OVHcloud Kimsufi KS-5

I ordered an OVHcloud Kimsufi KS-5 dedicated server for 19.90 USD/month. It is not fast by modern standards, but it is a very usable small Proxmox box if you install it carefully. The goal for this machine was: Proxmox VE on mirrored ZFS root. Keep only part of each SSD for the root pool. Use the remaining SSD space as a fast disposable scratch pool. Put VMs and CTs behind NAT, because the server…