See original post for full discussion: FortiGate Firewall using VIRL - VIRL - Dev-Innovate discussion and support community
If anyone is interested in using the FortiGate Firewall within VIRL then I have a post over on my site.
At this moment in time the logging will not work as this requires an additional volume/disk to be attached. I'm yet to discover a way to achieve this in as per these previous posts, but everything seems to be functional.
|Custom Images - additional volume/disk|