Create Linux Guest Horizon

Purpose

To create a Linux VDI desktop that no one in the company will end up using. This is purely for learning purposes and I do not expect this to be used.

As of Horizon 7.13 only manual desktops are supported.
You can't use the standard Horizon connection servers, you have to use the Linux versions to host Linux desktops. So forget this!

Used the Workstation software selection with whatever optional graphical tools were available. I did not install the office suite.
I assume the best practice is to build the base OS without joining to the domain. Then as users need desktops you would clone the base image, update the hostname, join the domain, then enroll into horizon.
I created a setup user called "setup" and will be using this to configure the system.

After performing initial updates, and installing any additional software (i.e. Chrome).

dnf upgrade -y && reboot

Join the system to the domain

realm join -U <domain admin>

I then copied the agent installer to the image, unpacked it, and ran the installer. It was completely seamless so far.