Dockerize a Flask App

How dockerize a Flask app…

here my very basic app:
main.py

from flask import Flask app = Flask(__name__) @app.route('/') def hello_world(): return 'Hello, World!' if __name__ == "__main__": app.run(debug=True, host="0.0.0.0") 

N.B: above I have set public ip 0.0.0.0, beacuse with 127.0.0.1 it’s reachable only inside the container and not from the outside outside.
create a file requirements.txt
and insert all the pip libraries that your app require (in my case only Flask).

requirements.txt

flask 

create a file named Dockerfile:

FROM ubuntu:18.04 LABEL maintainer “yor name <your@email.com>” RUN apt-get update -y && \ apt-get install -y python3-pip python3-dev # We copy just the requirements.txt first to leverage Docker cache COPY ./requirements.txt /app/requirements.txt WORKDIR /app RUN pip3 install -r requirements.txt COPY . /app ENTRYPOINT [ “python3” ] CMD [ “main.py” ] 

build the image launching from terminal the command:
docker build -t name_of_yuor_image:latest .

run the container launching from terminal the command:

docker run --name name_your_container -p 5000:5000 -d name_of_yuor_image:latest


connected to address: http://0.0.0.0:5000

Watch the video tutorial:

https://youtu.be/Pjd4k4l8oV0