Docker Compose

• Why: configure relationships between containers

• Why: save our docker container run settings in easy-to-read file

• Why: create one-liner developer environment startups

• Comprised of 2 separate but related things

  1. YAML-formatted file that describes our solution options for:

     • containers

     • networks

     • volumes

  2. A CLI tool docker-compose used for local dev/test automation with those YAML files

docker-compose CLI

• CLI tool comes with Docker for Windows/Mac, but separate download for Linux

• Not a production-grade tool but ideal for local development and test

• Commands are here Cheat Sheet

• If all your projects had a Dockerfile and docker-compose.yml then "new developer onboarding" would be:

  • git clone github.com/some/software

  • docker-compose up

External links

• The YAML Format: Sample Generic YAML File

• The YAML Format: Quick Reference

• Compose File Version Differences (Docker Docs)

• Docker Compose Release Downloads (good for Linux users that need to download manually)

• Multiple Compose files

• Using Compose in production