Talk about how to simplify life in software development with docker. Show amount of tips for how to produce clean code with ruby on rails.

1. Cleaners of Caribbean

2. about me
In IT from 1998
My first OS was CP/M
My first computer was without
monitor
My first contribution into
OpenSource was a support of
Cyrillic and UTF-8 in Gentoo

3. Rails Guide
Rails blog in 15 minutes...

10. need something to do

12. Required Software
Homebrew
RMV/RBENV/etc
PostgreSQL/MySQL/Mongo/Etc
libxml, libxslt, and others...

13. 5 hours later

16. What did we do?

17. What did we do?
we have already begun to pollute our
system

18. What did we do?
we have already begun to pollute our
system
we have made our system unstable

19. What did we do?
we have already begun to pollute our
system
we have made our system unstable
we have made our system unpredictable

20. What did we do?
we have already begun to pollute our
system
we have made our system unstable
we have made our system unpredictable
we have made our system unmaintainable

21. How to solve?

23. Docker
Clean local system

24. Docker
Clean local system
Easy startup with docker-compose

25. Docker
Clean local system
Easy startup with docker-compose
Predictable environment

26. Docker
Clean local system
Easy startup with docker-compose
Predictable environment
Kubernetes

28. What we need for our blog?!
devise
cancancan
rolify
rmagick
commentable
acts_as_tree, acts_as_list, etc
And much more other libraries …

30. How to solve?

31. Use a standard libraries
net/http instead of rest-client/faraday/etc
json instead of multi_json/oj/yajl/etc
You don't need cancancan for limiting one controller
You don't need rolify for 2 roles
You don't need trailblazer for 2 actions

34. Contamination of project

35. Fat Models

37. Fat
Controllers

39. no tests

40. copy - paste

41. Model.all
On Table with
100000 records

42. after some time …

44. plan
of
barbossa

45. Service Objects
Put your business logic outside models, controllers, jobs

46. Test Driven Development
Its a fastest way to check your code and a way to
increase your development speed

47. Code Review
Review your code all the time. Use a tools for it.

48. Continuous Integration
Automate your processes of check, review and deployment

49. K.I.S.S.
Keep it simple stupid

50. Check the limits
Run your staging with limited resources

51. questions?
Email: oleksandr@amoniac.eu
Github: simonoff