Running as a host user within a Docker container

Question

In my team we use Docker containers to locally run our website applications while we do development on them.

Assuming I\'m working on a Flask app at app.py

Answer 1

You can share the host's passwd file:

docker run -ti -v /etc/passwd:/etc/passwd -u `id -u`:`id -g` -v `pwd`:`pwd` -w `pwd` -v pydeps:/usr/local -p 8000:8000 python:3-slim ./manage.py runserver

Or, add the user to the image with useradd, using /etc as volume, in the same way you use /usr/local:

docker run -v etcvol:/etc python..... useradd -u `id -u` $USER

(Both id -u and $USER are resolved in the host shell, before docker receive the command)