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