This is why things like MAAS exist, which is a 'cloud provider' that lets you provision bare metal machines. Plug in a new rack of servers, let them netboot, an

This is why things like MAAS exist, which is a 'cloud provider' that lets you provision bare metal machines. Plug in a new rack of servers, let them netboot, and let the clients spin up a machine matching their requirements in the same way they would spin up an AWS or Azure instance. We mix bare metal spun up this way with Open Stack VMs, depending on the requirements. And slice up into containers using LXD when that makes sense.