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Are you looking to build a docker image? Are you looking to build a docker image that will consist of a Django application? If so, you came to the right site! Today, we will be discussing more on how to build and tag a django application to a docker image that can be ready for deployment.

Getting started

In order to move forward, we must make sure we have the following.

The following:

1. Docker
2. Django
3. Virtualenv

Before we can create our project, lets create our virtualenv with our dependencies & libraries that may be needed for the application. We can start by following the instructions listed below.

1. virtualenv -p python3 virtualenv_name
2. source virtualenv_name/bin/activate
3. pip install Django

Next, we must create a new Django application using the following command:

django-admin startproject project_name

Once completed, navigate to your manage.py and create a txt file called requirements.txt. Next, use the following the command to concat your dependecies to your txt file.

pip freeze > requirements.txt

Creating Docker File

Add the following to your Dockerfile

					
FROM python:3.7

# set environment variables
ENV PYTHONUNBUFFERED 1

# run this before copying requirements for cache efficiency
RUN pip install --upgrade pip

# set work directory early so remaining paths can be relative
WORKDIR /App

# Adding requirements file to current directory
# just this file first to cache the pip install step when code changes
COPY requirements.txt .

# install dependencies 
RUN pip install -r requirements.txt

#copy code itself from context to image
COPY . .

# run from working directory and separate args in the json syntax
CMD ["python", "./manage.py", "runserver", "0.0.0.0:8000"]
					
					

Build, tag, and run our Docker image

Use the following command to build and tag your Docker image

1. /* Command to tag & build your docker image */

   Docker build . -t imageName

2. /* Command to run our image on the extension and port *\

   Docker run -d -p extension:port imageName

Example

					
docker build . -t django_app

docker run -d -p 1234:80 django_app

					
					

Once you follow the steps, go to localhost:extension (in my case, I will go to localhost:1234, since my extension is 1234) and press enter.