This document summarizes using Docker to containerize a Django web application. It describes using separate Docker containers for the Django/Uwsgi application code, Nginx web servers, and a Postgresql database. The architecture involves running multiple Uwsgi containers that connect to a single Postgresql database container for high availability. It also describes pulling code changes from a Git server into running Uwsgi containers and committing container changes to new Docker images.

1. Containerizing Django Web
applications with Docker
A presentation by Gladson V Manuel
https://in.linkedin.com/in/gladsonvm

2. Architecture

3. ● Django/Uwsgi:
This container holds the code and configuration together with django and its
dependencies (pypi-pip packages). More than one containers with same
configuration can be used to handle failures.
● Nginx
Nginx containers run nginx servers and will serve django web applications
using uwsgi.
Containers/Components

4. Containers/Components
● Postgresql
Postgresql container maintains the database. uwsgi containers connect to
postgresql container to access database. Its better to use database
replication also.
It is recommended to save database file outside database since periodic
commits and image creations are required to save changes in database if
database file is kept inside container.

5. Architecture: Docker Registry Server
UWSGI
docker image
nginx docker
image
Container(Running
instance) of uwsgi image
Git Server
git push git pull
New uwsgi image
with updated code
from git
Commit and save
running container

6. Components/Images
● Uwsgi
Uwsgi container contains django code and all dependencies for web
application. Whenever there is a change in code, changes are pulled from git
server to running instance uwsgi container.
● Commit and Save
Changes in running containers are committed and saved to another new
image. After verifying that the image will work fine without any issues, this
new image will be used to create further containers and run django
application in it. This same procedure can be applied to nginx container
also.

7. Thank you