Django Dockerizing App

This page explains how to Dockerize a Django application with ease. For newcomers, Django is a leading web framework crafted in Python and Docker is a virtualization software used to isolate the execution of a  service or product using virtual containers. 
Adding Docker
First of all, make sure you have Docker installed and running on your machine. Refer to the official documentation and follow the steps.
Once it's done, create a Dockerfile file. This will contains all the commands that could be called on the command line to create an image.
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# pull official base image
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FROM python:3.9.5-slim-buster
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​
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# set work directory
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WORKDIR /usr/src/app
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​
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# set environment variables
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ENV PYTHONDONTWRITEBYTECODE 1
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ENV PYTHONUNBUFFERED 1
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​
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# install psycopg2 dependencies
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RUN apt-get update \
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  && apt-get -y install netcat gcc \
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  && apt-get clean
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​
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# install python dependencies
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RUN pip install --upgrade pip
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COPY ./requirements.txt .
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RUN pip install -r requirements.txt
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​
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# copy project
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COPY . .
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​
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CMD [ "python", "manage.py migrate" ]
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CMD [ "python", "manage.py runserver 0.0.0.0:5000" ]
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​
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# Exposing default running port
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EXPOSE 5000
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Once this is done, we can build the image and run it. 
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$ docker build -t django_app .
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$ docker run -p 5000:3000 django_app
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You can now access your app on localhost:5000.
Adding Docker Compose
If you want to create multiple images and run them using the precedent Docker configuration, you'll have to create multiple Dockerfile. 
Docker Compose saves from this by allowing you to use a YAML file to operate multi-container applications at once and run it just with one command. 
Follow the official documentation to install docker-compose on your machine.
Once it's done, create a docker-compose.yml file at the root of your project. Make sure to have an .env file at the root of your project. 
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version: '3.8'
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​
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services:
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  django-app: # The name of your application
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    build: ./
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    command: >
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      sh -c "python manage.py migrate &&
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             python manage.py runserver 0.0.0.0:5000"
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    volumes:
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      - ./:/usr/src/app/
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    ports:
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      - 5000:5000
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    env_file:
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      - ./.env
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We can now remove some lines from the Dockerfile.
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​
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CMD [ "python", "manage.py migrate" ]
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CMD [ "python", "manage.py runserver 0.0.0.0:5000" ]
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​
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# Exposing default running port
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EXPOSE 5000
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And now let's use docker-compose command to build and run the image.
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docker-compose up --build
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And your application will be running on localhost:5000.
Dockerize a production-ready app
@please refer to the configuration implemented by the reference Django Codebase​
Django App
short info regarding the codebase
Gunicorn - the WSGI server
 gunicorn-cfg.py​
Nginx - a powerful HTTP proxy 
 appseed-app.conf​
Dockerfile
How to bundle the information 
short description
sample -  Dockerfile​
Docker-compose
included sections - short description
sample -  docker-compose.yml​
​

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Contents

Adding Docker

Adding Docker Compose

Dockerize a production-ready app