Possible to have Docker environment variable to set UID / GID?

[richardpowellus]

I would like to be able to control the user transmission-rss runs at in my Docker container so that I can give read only access to only that user to my transmission-rss.conf file.

Right now it looks like it just runs with UID 1000.

Or is there a different way I can accomplish this?

[nning]

Hey,

thank you very much for your suggestion!

I changed the Dockerfile to make it possible to specify the UID/GID by --build-arg. So currently it is not possible to set the UID/GID an runtime.

You can build a docker image with custom UID/GID with the following command:

docker build -t transmission-rss --build-arg UID=1337 --build-arg GID=1337 .

And then run the image with this command, for example:

docker run -it -v $(pwd)/transmission-rss.conf:/etc/transmission-rss.conf transmission-rss

In my tests everything worked with a transmission-rss.conf that was owned by the specified UID/GID and chmod 600.

Let me know, if it works for you!

Best regards,
henning

[reconman]

I found this issue while looking for one addressing my current issue.

Docker has a native support for --user=uid:guid. Don't use the user and group names as those would have to be specified when building the image.