If you want to encrypt your data, the best way is usually to start at the lowest layer possible to get as much data encrypted as possible. If you run all your VMs on top of Proxmox, then adding encryption to all disks in Proxmox is the natural solution, but there doesn't seem to be an official way. In addition, I haven't found a full guide, but lots of people that wanted to do it and didn't know how. This tutorial is for those people: If you want to add full disk encryption to Proxmox...
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