What is the best and easy way to remotely debug a python code running in a docker container?

Question

I have just started working on python. I want to debug python code that is running in a docker container . Can anyone please suggest me what could be the best way to remotely debug this? I am open to use any of the IDE like pycharm or VS Code etc. Thanks in advance.

Note: I'm using Mac OS for the development

Answer 1

One technique that I used to debug from within container was to :

• Comment the entrypoint ENTRYPOINT ["/mydir/mycode.py"] in the Dockerfile
• Restart the container and do docker exec -it <container name> /bin/bash
• Then perform pdb /mydir/mycode.py

Other technique could be to expose the remote debugging port on the docker container using docker expose command which will allow pycharm to connect to the code. A similiar approach is discussed here.

https://medium.com/@furkanpur/remote-python-debug-to-docker-container-over-ssh-by-using-pycharm-44a9b6e82206

Answer 2

Expanding on what piy26 mentioned regarding exposing a remote docker port, I think pudb is very apt for the task. I wrote a github repository with a simple example and step by step instructions you can clone and try out https://github.com/isaacbernat/docker-pudb

There is more info on this other answer: Running pudb inside docker container