docker-compose with Postgres and Redis
Run the full stack with one command.
docker-compose with Postgres and Redis is a free Django Academy lesson on CoddyKit — lesson 2 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Django Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
One Command, Whole Stack
docker-compose defines many containers in one file, so Django, Postgres, and Redis start together with a single command. 🧩
The compose File
Everything lives in docker-compose.yml, where each container you need becomes an entry under the services key.
services:
web:
db:
redis:The web Service
Your web service builds from your Dockerfile and runs Django, the heart of the whole stack.
web:
build: .
command: gunicorn config.wsgi:application --bind 0.0.0.0:8000Add Postgres
The db service uses the official Postgres image, giving you a real database without installing anything locally.
db:
image: postgres:16Add Redis
The redis service runs the official Redis image, ready to act as a cache or a Celery message broker.
redis:
image: redis:7Connect by Service Name
Compose gives each service a DNS name, so Django reaches Postgres at the host db, not localhost.
DATABASE_URL=postgres://user:pass@db:5432/appWait with depends_on
Use depends_on so web starts after db and redis, keeping your startup order sane.
web:
depends_on:
- db
- redisPersist Data with Volumes
A named volume stores Postgres data outside the container, so your rows survive restarts and rebuilds.
db:
volumes:
- pgdata:/var/lib/postgresql/dataPass Configuration as Env
Feed secrets and settings through environment or an env_file, keeping config out of your image.
db:
environment:
POSTGRES_DB: app
POSTGRES_PASSWORD: passMap Ports to Your Host
The ports key forwards a container port to your machine, so you can open the app in a browser.
web:
ports:
- "8000:8000"Bring It All Up
Run docker compose up and the entire stack boots together; add -d to run it in the background.
docker compose up -dQuick Check
How does your web container reach the database in Compose?
Recap
You wired a full stack in docker-compose: web, db, and redis services, connected by name, with volumes for data and one command to launch. 🚀
Frequently asked questions
Is the “docker-compose with Postgres and Redis” lesson free?
Yes — the full text of “docker-compose with Postgres and Redis” is free to read here on the web, and the Django Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Django Academy course, upgrade to CoddyKit PRO.
What will I learn in “docker-compose with Postgres and Redis”?
Run the full stack with one command. You practise Django Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Django Academy?
No prior experience is required. Django Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 2 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “docker-compose with Postgres and Redis” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Django Academy lesson?
Yes. Every Django Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Writing a Django Dockerfile
- docker-compose with Postgres and Redis
- Entrypoints, Migrations, and collectstatic
- Production Image Best Practices