Flask in a docker working on Azure but not locally - azure

Question

Here is my code (app.py) :
from flask import Flask
app = Flask(__name__)
#app.route("/")
def hello():
return "Hello World composcan"
if __name__ == "__main__":
app.run(debug=True,host='0.0.0.0', port=8002)
When i use this dockerfile :
FROM ubuntu:18.04
MAINTAINER bussiere "bussiere#composcan.fr"
RUN echo "nameserver 8.8.8.8" >> /etc/resolv.conf
RUN echo "nameserver 80.67.169.12" >> /etc/resolv.conf
RUN echo "nameserver 208.67.222.222" >> /etc/resolv.conf
#RUN echo "dns-nameservers 8.8.8.8 8.8.4.4 80.67.169.12 208.67.222.222" >> /etc/network/interfaces
ENV LANG C.UTF-8
RUN apt-get update -y
RUN apt-get install -y --no-install-recommends apt-utils
RUN apt-get install -y python3 python3-pip python3-dev build-essential
RUN python3 -m pip install pip --upgrade
RUN python3 -m pip install pipenv
RUN export LC_ALL=C.UTF-8
RUN export LANG=C.UTF-8
COPY app /app
WORKDIR /app
RUN pipenv --python 3.6
RUN pipenv install -r requirements.txt
ENTRYPOINT ["pipenv"]
CMD ["run","python","app.py"]
it works on azure perfectly :
http://koalabourre.azurewebsites.net/
But when i try to run it locally from docker on ubuntu with :
docker run --rm -it -p 8002:8002 flask-quickstart
i have :
* Serving Flask app "app" (lazy loading)
* Environment: production
WARNING: Do not use the development server in a production environment.
Use a production WSGI server instead.
* Debug mode: on
* Running on http://127.0.0.1:8002/ (Press CTRL+C to quit)
* Restarting with stat
* Debugger is active!
* Debugger PIN: 101-413-323
i can't open it in my browser with localhost:8002
here is the organisation of the project :
And the docker is here
https://hub.docker.com/r/dockercompo/koalabourre/
And running app.py outside a container locally works perfectly ...

Answer 1

You'll have to be listening on an "external" (docker network) address to forward ports. Looks to me like your code doesn't quite match the program's output in that regard.
Your code says
app.run(debug=True,host='0.0.0.0', port=8002)
But your output says
* Running on http://127.0.0.1:8002/ (Press CTRL+C to quit)