Debugging Python in Docker using VSCode

Good day folks! In this video we'll take a look at debugging python code inside docker containers using VSCode remote debugging!

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[aike.h.]

The most DevOps guy I've ever seen, not even python installed locally :D

[khaledarja]

taking debugging to a whole new level.. THANKS!

[guillermomoran-arreola]

Finally! I am debugging Python in Docker! You're awesome! Thank you :)

[johnkntran]

Excellent content as always and very useful! P.S. If you are running VSCode inside the container (rather than on your local machine) via the VSCode Remote Extension, the debugging setup is a little different. There is no "portMapping" section needed from your localhost to the remote host. They've also upgraded PTVSD to DebugPy since. Keep making great stuff!

[grcdeepak]

Great! Can you do a video on debugging a Kubernetes python application ?

[mikevictorecho]

Great, this finally works. I tried so many things to debug into a flask docker environment. I tried ptvsd before without luck, i tried remote containers, etc.

[tonyBeloni]

Clear concise and well explained. Thank you

[pingyang]

Thanks for the real example, actually there is one thing to update to make it running, in the requirements.txt, using Flask == 2.0.3 instead.

I'm not 100% sure because I tried a little to make it work, but here's what I had to change in the Dockerfile to replace ptvsd with debugpy:

1. RUN pip install debugpy

2. CMD python -m debugpy --listen 0.0.0.0:5678 --wait-for-client -m flask run -h 0.0.0 -p 5000

[marekczarnecki]

Appreciate your work. Really relevant to my current work. Thank you

[treerhym]

my question is how can I connect to container which is already running ? It seems like vs code starting new container in debug mode instead of connecting with existing one

[Slygon]

Thanks - that's awesome !
It's important to note the ptvsd is deprecated in favor of debugpy :)

[raavimanoj]

@That DevOps Guy can we debug aws lambda (python) created using container image with the same approach? We can do with AWS SAM template but wondering can we directly debug the Lambda Container using the same approach?

[ALaaHamoudah]

Thank you for the video, I did the same configs but for a file not a server, it runs the debugger but I can't see anything in the variables and watch, and it also not stoping on a breakpoint

[mciccozz]

AMAZING video! thank you so, so much!

[nailsonlandim]

Huge thanks! I could setup here in a container with a complete diferent scenario. It's a Video traffic recognition using CUDA/GPU
Again, Huge Thanks!

[bzouchir]

how do you get this to work for a pyramid application that serves using 'pserve'? any help or direction would be appreciated!

[AlexandreShimono]

Awesome video! Question: if I do not use the "wait", can I still attach the debugger to the container?

[ruiw]

This is very useful. but just wonder if any code change on your local src will be reflected and live loaded into your running docker?

[jayhawkelectrical]

Hi Marcel, fantastic video! I have this setup with my project but I cannot get it to hit any of the breakpoints I have defined.