Roon on Docker using Truecarts template in Truenas scale

Thanks for your answer. I finally managed to make it work by using the option " Provide access to node network namespace for the workload " instead of configuring network.

Thanks, this is pretty cool!

Simplified the networking section using DHCP (Add external interfaces, set it to DHCP, no extra DNS entry needed).
For the volumes, created subdirectories roonserver/{app,data,backup} within a zfs dataset apps from the command line.