Docker Compose

Introduction to Docker Compose

What is Docker Compose?

Compose is a tool for defining and running multi-container Docker applications. With Compose, we use a YAML file to configure our application’s services. Then, with a single command, we create and start all the services from our configuration.

• A tool for defining and running multi-container Docker applications

• With Compose we use a YAML file to configure our application's services

• Compose works in environments: production, staging, development, testing, as well as CI workflows.

• With a single command, we can create and start all the services from our configuration.

Docker Compose is a 3 steps process

1. Define our app's environment with a Dockerfile so it can be reproduced anywhere.

2. Define the services that make up our app in docker-compose.yml so they can be run together in an isolated environment.

3. Run docker-compose up and Compose starts and runs our entire app.

$ docker-compose up

Building Blocks of Docker Compose