Server software recommendations

Inspired by “What’s a good piece of hardware to run a jellyfin server?” I wanted to get the communities thoughts on how to set up my home media server.

Current hardware: Apple Mac mini “Core i7” 2.3 (Late 2012) with 8GB RAM (2x4GB) and 1.0TB Mercury Electra 6G SSD that I upgraded

OS: OMV6 (6.9.14-1 (Shaitan))

Docker containers:

Goal:

Use this old Mac Mini for as long as possible as a media server. Be able to download with Transmission over VPN and then add them to a Plex media folder via SMB on my Mac Studio. I want to manage the containers in Portainer and I’ve used Stacks/Compose to add most of the containers. Use the discrete GPU for hardware accelerated transcoding, mostly so I can download movies to my iPad quicker, less so other people can use it remotely. The containers should restart if they stop and I want to keep them updated automatically if possible. I’ve not experimented with Servarr yet (Radarr, Sonarr), not opposed, but also happy to drag them over.

Problems:

I don’t love OMV, I seem to have a recurring DNS issue with containerd that causes Plex to stop whenever I’m watching a movie. I can run a test and leave something playing all day and not have a problem, then whenever I want to watch something with my wife, the whole system becomes unavailable and I have to watch a ping until it comes back. I’m considering a new OS, it should be accessible via VNC/SSH and have my internal and external drive shared as a SMB share to my Mac. I can’t figure out how to get the GPU to be seen by OMV so everything is on the CPU, an OS where this is easier is preferred.

Questions:

Any OS recommendations to use instead of OMV6?
Advice on getting the discrete GPU seen in whatever OS I use?
I can’t tell if it’s Haugene causing the DNS issue, I’m using public Google/CloudFlare DNS to avoid using my PiHole that runs on a Pi3b. Can I set up Docker to use a different network so it doesn’t bring my whole system’s IP down? It might also be Watchtower updating a container and bring it down, any advice to troubleshoot would be appreciated.

Disclaimer:

IT guy, but mostly Mac. I can Google my way through most things, but I am NOT a Linux or Docker expert. So please go easy on me if I have any follow up questions!

Thank you in advance!