Introduction to Docker for Le Wagon alumni

Learn the very basics of Docker and discover https://github.com/lewagon/rails-k8s-demo boilerplate for Dockerizing and Helmifying Rails projects.

Transcript

1. Learn what Docker is all about and see how to dockerize a Rails application Introduction to Docker.
2. Important disclaimer.
3. Code is just text.
4. Code is just text. { with fancy chars }
5. Wouldn’t run on its own.
6. LGTM!
14. A tiny flashback.
15. Silly question, get dressed and go to work!
16. Simple code, runs on any Ruby
17. Simple code, runs on any Ruby
18. Simple code, runs on any Ruby Not anymore…
19. Let’s dockerize
20. Let’s dockerize
21. Keep building
22. Keep building
23. Images and containers
24. Images and containers
25. It’s all about isolation
26. Language runtime It’s all about isolation
27. Language runtime File system It’s all about isolation
28. Language runtime File system Binary dependencies It’s all about isolation
29. Language runtime File system Binary dependencies Network ports It’s all about isolation
30. Language runtime File system Binary dependencies Network ports Users and groups It’s all about isolation
31. Not a virtual machine
32. Docker
33. Docker
34. Docker Great for local development
35. Docker Code + environment image/container Great for local development
36. Docker Code + environment image/container Great for local development Tutorials lie, it’s never one image
37. Docker Code + environment image/container Great for local development Tutorials lie, it’s never one image
38. Rule of . 1 container == 1 process
39. Rule of . 1 container == 1 process Rule them all: docker-compose
40. DEMO TIME
43. Docker vs. Kubernetes
44. Kubernetes
45. Kubernetes
46. Kubernetes Great for production
47. Docker vs. Kubernetes ❤
48. https://youtu.be/4ht22ReBjno
49. https://github.com/lewagon/rails-k8s-demo
50. https://progapanda.org