Build docker image with Flask & Python3 and Ubuntu 18.04

Setting Up Flask

Assuming docker installed in your ubuntu 18.04 instance. Move into your project path.

    Example : /home/gisak/projects/python/logics/pic_holdr/pic_holdr/pic_flk_holdr

Files present within project folder were below.

Contents present within requirements.txt file :

    flask==1.1.1

Contents present within Dockerfile :

FROM ubuntu:18.04
MAINTAINER GisakInc 'support@gisakinc.com'
RUN apt-get update -y \
    apt-get install -y python3-pip python3-dev
COPY ./requirements.txt /app/requirements.txt
WORKDIR /app
RUN pip3 install -r requirements.txt
COPY . /app
ENTRYPOINT [ "/usr/bin/python3" ]
CMD ["base.py"]

Contents present within base.py :

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=9302)

Creating Virtual Environment with python3 :

    python3.6 -m virtualenv vbase_flk

Running Flask Server:

    python base.py

Building Docker Image:

Note: current path is project base path. we specified project contents in current path(dot symbol).

`sudo docker build -t pic_flk_holder:0.0.03 .`

Once its completed, Build will present in Docker List.

 sudo docker images

After docker image created, we have to test the container by running it.

    sudo docker run -d -p 9032:9032 pic_flk_holder:0.0.03

Once docker started running, we can see it by below command.

That's it. Hope this helps!