finally also oVirt Node images for oVirt 3.3.1 are available.
The latest ISO can be downloaded here:
To get started take a look at the section in the Quick Start Guide:
oVirt Node is a small image with yet enough software for bare metal
hosts which shall be managed by oVirt Engine. It is easy to handle and
can be deployed using CD/DVD, PXE/Foreman and USB.