I have a flask app, if use "python app.py" to start the server, it runs perfectly. The browser client can get what I want.
However, if I use docker container, If I use below DockerFile:
FROM python:3.6.5-slim
RUN mkdir /opt/convosimUI
WORKDIR /opt/convosimUI
RUN pip install Flask
RUN pip install grpcio
RUN pip install grpcio-tools
ADD . .
EXPOSE 5000
ENV FLASK_APP=app.py
CMD ["python", "-u", "app.py"]
The browser (on windows) can not get response from server, in the linux container, everything works perfect and I can use wget to get content of 127.0.0.1, but outside the container, everything in container is not accessible.
If I change the lask line of DockerFile into:
CMD ["flask", "run", "--host", "0.0.0.0"]
Not use python app.py, then it works again.
Why this happen? And how if I want to use python app.py command?
It because there're some other parallel processing in app.py which I need to share the client of another service, and this client must be always on when turn on the web server. So I can not just put them in separate place.
Any ideas are welcome. Thanks!
