Users would love rootless image builds. However, rootless image building is basically impossible because there are no sane ways to populate a disk image except for loop devices which require root.

However, when /dev/kvm is available, it would be possible to spawn minimal VM and run osbuild inside.

Goal:

• Create a PoC of image-builder building images with root privileges.
• The PoC will leverage /dev/kvm seamlessly. IoW the user shouldn't know that a VM is used underneath.

Acceptance Criteria:

• `$ image-builder build qcow2` just works