How to remote debug python code in a Docker Container with VS Code
docker, python, remote-debugging, visual-studio-code
Solution
Yes, this is possible - when the Python app is running in a Docker container, you can treat it like a remote machine.
In your Docker image, you'll need to make the remote debugging port available (e.g. `EXPOSE 3000` in the Dockerfile), include the `ptvsd` setup in your Python app, and then publish the port when you run the container, something like:
docker run -d -p 3000:3000 my-image
Then use `docker inspect` to get the IP address of the running container, and that's what you use for the `host` in the launch file.
Problem
I've just registered for this question. It's about if it's possible to remote debug python code in a Docker Container with VS Code. I am having a completely configured Docker Container here. I got a little bit of help with it, and I'm pretty new to docker anyways. In it runs Odoo v10. But I cant get the remote debug in VS Code to work. I have tried this explanation, but I don't really get it. Is it even possible? And if yes, how can I get it to work? I'm running Kubuntu 16.04 with VS Code 1.6.1 and the Python Extension from Don Jayamanne. Ah yeah and I hope I am at the right location with this question and it's not against any rules. UPDATE: Just tried the way of Elton Stoneman. With it I'm getting this error: ``` There was an error in starting the debug server. Error = {"code":"ECONNREFUSED","errno":"ECONNREFUSED","syscall":"connect", "address":"172.21.0.4","port":3000} ``` My `Dockerfile` looks like this: ``` FROM **cut_out** USER root # debug/dev settings RUN pip install \ watchdog COPY workspace/pysrc /pysrc RUN apt-get update \ && apt-get install -y --no-install-recommends \ build-essential \ python-dev \ && /usr/bin/python /pysrc/setup_cython.py build_ext --inplace \ && rm -rf /var/lib/apt/lists/* EXPOSE 3000 USER odoo ``` The `pysrc` in my Dockerfile is there because this was intended for working with PyDev (Eclipse) before. This is the `run command` I've used: ``` docker-compose run -d -p 3000:3000 odoo ``` And this is the important part of my `launch.json`: ``` { "name": "Attach (Remote Debug)", "type": "python", "request": "attach", "localRoot": "${workspaceRoot}", "remoteRoot": "${workspaceRoot}", "port": 3000, "secret": "my_secret", "host": "172.21.0.4" } ``` I hope that's enough information for now. UPDATE 2: Alright I found the solution. I totally misunderstood how Docker works and tried it completeley wrong. I already had a completeley configured Docker-compose. So everything I needed to do was to adapt my VS Code configs to the docker-compose.yml. This means that I just had to change the launch.json to the port 8069 (default Odoo port) and just need to use `docker-compose up`, then the debugging works in VS Code. Unfortunately the use of `ptvsd` kinda destroys my Odoo environment, but at least I'm able to debug now. Thanks!