Django Docker Installation

This blog is to explain Django  Docker installation. Docker is a software platform to create, deploy and manage virtualized application containers on a common operating system, with an ecosystem of allied tools.

First follow these steps to install Docker in Ubuntu.

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

sudo apt-get update

sudo apt-get install -y docker-ce

Next, install Docker Compose by running these

sudo curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

Next we are going to install Django in Docker.

Create a directory named docker_first somewhere in your home directory.
Create a file named Dockerfile in it. Add the following lines to it and save.

FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
COPY requirements.txt /code/
RUN pip install -r requirements.txt
COPY . /code/

Create a file named requirements.txt in the same location. Add the following lines into it.

Django>=2.0,<3.0
psycopg2>=2.7,<3.0

Create another file named docker-compose.yml
Add the following code into it

version: '3'

services:
  db:
    image: postgres
  web:
    build: .
    command: python manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"
    depends_on:
      - db

Next, create a Django project by run this

sudo docker-compose run web django-admin startproject composeexample .

Run this command to change the file permissions

sudo chown -R $USER:$USER .

Edit the composeexample/settings.py file. Copy following lines in place of DATABASES

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'postgres',
        'USER': 'postgres',
        'HOST': 'db',
        'PORT': 5432,
    }
}

Add 'localhost' in ALLOWED_HOSTS in the same settings.py. It will look like this

ALLOWED_HOSTS = ['localhost']

Run the following command in the docker_first directory

sudo docker-compose up

Now open http://localhost:8000 to check the installation. Thank you

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