The document discusses Docker Compose, a tool for defining and running multi-container Docker applications in various environments such as development, testing, and production. It highlights key use cases like automated testing environments and single host deployments, as well as its effectiveness in managing isolated environments and preserving volume data. Additional resources for further reading and examples are also provided.

2. What is it?
● Tool
○ Define and Run
○ Multi-container docker apps
● Works in all environments
○ Development
○ Testing
○ Staging
○ Production
○ CI workflows
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3. Common Use Cases
● Development environments
○ Document and configure your app’s service dependencies (db, cache, api, etc.)
● Automated testing environments
○ Convenient way to create and destroy isolated test environments
● Single host deployments
○ Single instance provisioned with Docker machine can host all your required services
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4. What makes it effective?
● Multiple isolated environments on single host
● Recreate only changed containers
● Preserve volume data when containers are created
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5. Demo
● docker-compose.yml
● docker-compose up
● docker-compose ps
● docker-compose stop
● docker-compose down
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6. Further reading
● Compose file reference: https://docs.docker.com/compose/compose-file/
● Command line reference: https://docs.docker.com/compose/reference/
● Getting started: https://docs.docker.com/compose/gettingstarted/
● Examples:
○ Wordpress with MySQL: https://docs.docker.com/compose/wordpress/
○ Drupal with Postgres: https://docs.docker.com/samples/library/drupal/
○ Django with Postgres: https://docs.docker.com/compose/django/
○ Rails with Postgres: https://docs.docker.com/compose/rails/
● FAQs: https://docs.docker.com/compose/faq/
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7. Questions?
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