[Docker] DockerCompose Basics Section2 - Compose File Format

Why Compose?

CLI and YAML files

Designed around develop workflows

But, It’s not really designed for production

docker-compose CLI substitute for docker CLI

Recommend you use Docker Compose CLI by default locally

CLI not designed for production

Compose File Format

YAML

Common configuration file format

Used by Docker, Kubernetes, Amazon, and others

used for key/value pairs

Only spaces, no tabs

’ - ‘ used for lists

Compose YAML v2 vs v3

Myth busting : v3 does not replace v2

v2 focus : single-node dev

v3 focus : multi-node orchestration

If not using Swarm/Kubernetes, stick to v2