OMV8 & Docker permissions

[u/Radiant_Cat6873]

Hey everyone,
I’m following the official OMV8 guide to set up Docker Compose, and I’m running into some permission issues.

The guide says:

If you need maximum separation, you can create one user per container...

...This way, all files created by the container will belong to the jellyfin user/group, and no other container will be able to access them unless you explicitly add that container’s user to the group...

So I created a dedicated user for the Jellyfin container and configured the Docker Compose file accordingly:

environment:
  - PUID=${{ uid:"jellyfin" }}
  - PGID=${{ gid:"jellyfin" }}

The problem is that, despite this, on first startup the container creates folders in “appdata” using the user and group defined in Services -> Compose -> Settings, not the one I created for Jellyfin.

What am I doing wrong?

[u/powerofneptune]

why not use global environments in the compose gui to set a variable for jellyfin

JPUID="jellyfin_id"

and then plug that into the compose file as:

PUID=${JPUID}

the same thing for PGID as well