Writing a Compose File
Learn the YAML syntax for `docker-compose.yml` to define services, networks, and volumes.
Compose File: The Blueprint
Welcome to writing Docker Compose files! The docker-compose.yml file is your blueprint for defining and running multi-container Docker applications.
It uses YAML syntax to configure your application's services, networks, and volumes in a single file.
YAML: A Quick Refresher
Docker Compose files are written in YAML (YAML Ain't Markup Language). It's a human-friendly data serialization standard.
- Key-Value Pairs:
key: value - Lists: Items start with a hyphen (
- item) - Indentation: Crucial for defining structure and hierarchy. Use spaces, not tabs!
All lessons in this course
- What is Docker Compose?
- Writing a Compose File
- Deploying Multi-Service Apps
- Environment Variables and .env Files