zlacker

> Xen is an alternative hypervisor (like esxi). Instead of running on top of Linux, Xen has it's own microkernel. This means less flexibility (there's no Linux body running things), but also simpler to manage and less attack surface.

You're going to need dom0 (a "control domain") on any Xen host. Gotta have something running xl and the rest of the toolstack for managing it. dom0less technically exists but the drawbacks mean it's not really usable by most people in a production situation.