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