Dockerized PostgreSQL and Django for Local Development

| programming | devops | databases |

Docker and docker-compose make it dead simple to avoid dependency hell and have a consistent environment for your whole team while doing local development. This post walks through setting up a new Django project from scratch to use Docker and docker-compose. It is modeled after a previous post that I wrote about doing a similar thing with Laravel and MySQL.

Dockerfile

Nothing too interesting happening here. Installing python and pip.
FROM ubuntu:16.04

system update

RUN apt update RUN apt upgrade -y

python deps

RUN apt install -y python3-dev python3-pip

docker-compose.yml

version: '2'
services:
  app:
    build: .
    ports:
      - "8000:8000"
    volumes:
      - .:/app
    working_dir: /app
    command: bash -c "pip3 install -r requirements.txt && python3 manage.py migrate && python3 manage.py runserver 0:8000"
    depends_on:
      - db
  db:
    image: postgres:9.6.5-alpine
    environment:
      - POSTGRES_USER=feedread
      - POSTGRES_PASSWORD=feedread
    volumes:
      - ./data:/var/lib/postgresql/data
    ports:
      - "5432:5432"
With this in place you can start your Django app with docker-compose up. Each time the app starts it will install the latest dependencies, run migrations, and start serving the app on localhost:8000

Notes

  1. In order to do stuff with the database locally you should add the following record to your local /etc/hosts file
    # /etc/hosts
    

    127.0.0.1 db

  2. Since we define - .:/app as a volume, this means that all of your local changes are immediately visible in the dockerized app.
  3. If you need to access the running app or db container you can do so with docker-compose exec app bash or docker-compose exec db bash.
  4. This docker-compose file is not really suitable for production since it is not likely that you would want to build the container each time the app starts or automatically run migrations.
  5. You can add additional services like memcached, a mail server, an app server, a queue, etc., using the same method that we are using above with our database.

Thank you for reading! Share your thoughts with me on mastodon or via email.

Check out some more stuff to read down below.

Most popular posts this month

Recent Favorite Blog Posts

This is a collection of the last 8 posts that I bookmarked.

Articles from blogs I follow around the net

Supermicro NVIDIA GB200 NVL72 System at Computex 2024

We checked out the Supermicro NVIDIA GB200 NVL72 rack at Computex 2024. This is a prime example of why power is becoming such a big deal The post Supermicro NVIDIA GB200 NVL72 System at Computex 2024 appeared first on ServeTheHome.

via ServeTheHome July 22, 2024

Forum

Community is one of the main topics I touch on here. My community, my social media is an email and iMessage, but I thought I could do more. I did such an experiment last year and I quit soon after. I don't think I was ready for it. Today I still don&#…

via Michal Zelazny July 21, 2024

Weekly Update 409

It feels weird to be writing anything right now that isn't somehow related to Friday's CrowdStrike incident, but given I recorded this video just a few hours before all hell broke loose, it'll have to wait until next week. This week, the issue…

via Troy Hunt July 21, 2024

Generated by openring