Full Disk Encryption on OVH UEFI Servers

For a while, it has been possible to boot OVH servers in rescue mode and, using QEMU, install an OS in any way you want with its regular installation ISO. This includes unsupported modes such as a non-standard filesystem on / or using full disk encryption. The only requirement was to map the disks to regular QEMU devices, such as -hda /dev/sda arguments. I don’t remember exactly when I first did…