Works on Mac, doesn't work on Windows? about pyzmq-docker HOT 6 CLOSED

Here's a video of it not working. I upgraded the Dockerfile to python:3.9 which gets rid of the error from #2.

System info: Windows 11 Education, version 22H2. I had some team members try too, probably not on Education version.
Docker is running with a WSL 2 backend.

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We have a bunch of apps that we do docker compose. However, some of our apps have GUIs (pyqt) and getting the Gui out of docker seems really painful, so we have to communicate from the outside to the inside.

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Hi Kevin, I was planning to take a look at this over the weekend, but unfortunately didn't get to it.

I ran this (long ago) on Linux and Windows (not Mac, so thanks for testing that).
Do you think this is related to your issue: #2 ?

Could you provide a bit more details of what you have tried and your system? What version of Windows are you using (version number and whether it is the Home or Enterprise/Education version)? How did you install Docker (WSL 2 backend or Hyper-V)?

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From your screen recording I see you went for setup 3b in the README.

• Pub: python main.py
• Sub: docker run -p 5551:5551 -it foo/sub

I tested on my Windows 10 PC with Docker setup using WSL 2 and indeed I faced the same issue (after upgrading Docker image to python:3.10-slim).

It seems that even just pure Python (setup 1, no Docker) also faces the same issue. It might be firewall related as changing the IP solved the issue.

Solution local PC

For your publisher, try this code instead:

python main.py --ip 127.0.0.1

This changes the IP from 0.0.0.0 (your LAN network) to 127.0.0.1 (just your local PC),
Now you should messages appear in your Docker sub instance.
Note that might cause issues if your sub instance runs on another PC, but at least we're 1 step further now.

Solution across PCs

Unfortunately IP 0.0.0.0 doesn't seem to work on W10 and W11, so instead give it your LAN network IP.
Get you IP on Windows with:

ipconfig

and look for something that looks like:

IPv4 Address. . . . . . . . . . . : 172.16.0.112

This means you have to run the Publisher with:

python main.py --ip 172.16.0.112

(Didn't test it across 2 PCs, so let me know if it didn't work)

Other

For me setup 2 (docker-compose up --build) does work on Windows 10 with the IP still being the default 0.0.0.0.

Hope this helps!

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Pub

python main.py --ip 127.0.0.1

Sub

docker run  -p 5551:5551 -it foo/sub

worked for me. Thanks! I don't have time to test across two PCs, my use case is just for one PC anyway so this is perfect. If I understand correctly though, I think you could get the IP automatically on some platforms with

import socket
socket.gethostbyname(socket.gethostname())

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Glad it worked out for you @kevinlinxc !

Just out of interest, is there a reason why you're using a Python - Dockerized Python setup? Rather than having all scripts Dockerized and using docker-compose?

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