Docker 101 Rubyist Edition

Sample code at https://github.com/danguita/talks/tree/master/docker-101-rubyist-edition

Transcript

1. DOCKER 101 David Anguita <3 CiudadReal.rb
2. Hi, I'm @danguita
3. Let's talk about software containers
4. "It works on my machine"
5. Provides a widely adopted and easy-to-use interface to lightweight Linux Containers Why Docker?
6. Virtual Machine model vs Docker Engine model Why Docker? Source: http://docker.com
7. Minimal overhead
8. Daemon • Manages containers • Exposes a REST-ish API Client $ docker ps $ docker images $ docker run ... Docker Engine Docker Machine
9. Image vs Container $ docker images $ docker build $ docker pull $ docker push $ docker commit $ docker rmi $ docker ps $ docker run $ docker start $ docker stop $ docker rm Immutable, snapshot of a container Running instance of an image Docker Registry
10. MY FIRST CONTAINER
11. Gluing things together
12. Docker Compose $ docker-compose up $ docker-compose ps web $ docker-compose logs web $ docker-compose scale web=5 ... • Multi-container set up • Wraps Docker CLI • Image building • Links • Volumes • Ports • Scaling
13. api: image: ... command: ... environment: ... volumes: ... links: ... ports: ... frontend: ... sidekiq: ... postgres: ... elasticsearch: ... memcached: ... redis: ... haproxy: ... docker-compose.yml
14. MOAR CONTAINERS!
15. Real-world advantages • Easy Continuous Integration / Delivery • Consistency across environments • Portability • Isolated scalability • Rapid deployment • Instant (micro-)service oriented architecture • Clustering
16. Legos for cloud computing
17. • Docker Swarm • Kubernetes Clustering Tooling Platforms • Amazon EC2 Container service • Google Container Engine
18. This is just the beginning
19. Thank you
20. Q&A
21. CiudadReal.rb, January 2016