minikube start - halt when started as sudo/root

[ch1ago]

FEATURE REQUEST

• Environment: Any
• Minikube version: 0.30.0
• OS (e.g. from /etc/os-release): Linux/MacOS

What happened: Trying to run as sudo/root

What you expected to happen: I expected to see a message telling me to switch to a normal user.

How to reproduce it: sudo su then minikube start

Anything else do we need to know:

Minikube should NOT be run as root, but so many users switch to root so they can run install commands freely.

Please, add a halt very early to minikube start if the user is root. Let's put a nice message there that informs the user to never run minikube as root.

😱 Think of all the people who gave up on the installation process because of this tiny mistake.

[tstromberg]

I agree completely. Closing as a duplicate of #3138

There is a bit of nuance to address, since root is required for the --driver=none mode.