How to add users to Docker container?

Question

I have a docker container with some processes (uwsgi and celery) running inside. I want to create a celery user and a uwsgi user for these processes as well as a worker grou

Answer 1

To avoid the interactive questions by adduser, you can call it with these parameters:

RUN adduser --disabled-password --gecos '' newuser

The --gecos parameter is used to set the additional information. In this case it is just empty.

On systems with busybox (like Alpine), use

RUN adduser -D -g '' newuser

See busybox adduser