Continuous Delivery at GitHub

Transcript

1. ! Continuous Delivery at GitHub @rsanheim

2. ! @rsanheim

3. None

4. ! What is Continuous Delivery?

5. ! Software ready to be deployed at any time

6. ! Why should we care?

7. !

8. None

9. ! Besides… Shipping is fun

10. ! Releases and cycle time

11. Releases over one year Release 1 Build Test Deploy Bugs

    Change Requests Release 2 Build Test, Perf, Scaling Deploy Support Requests Complaints QA Revenue $$

12. Releases over half a year Build Deploy Bugs Issues Team

    Feedback Build & Scale Deploy Bugs Perf Staff Feedback Build Deploy Bugs Genpop Feedback Polish Deploy Bugs Genpop Feedback Polish Deploy Profit - Done!

13. ! How?

14. ‣ Automation ‣ Tests ‣ Pull Requests ‣ Feature Flags

    ‣ Chat Ops ‣ Post Deploy

15. ! Automation

16. https://www.flickr.com/photos/nasamarshall/5390879521

17. ! Tests

18. ! SLOC! ! ! ! Directory! ! 60995 test/models! 34526

    test/integration! 31106 test/controllers! 25339 test/lib! 12440 test/view_models! 1423 test/jobs! 1029 test/mailers! ! ! ! ruby test loc: 167k! ruby app loc: 158k! ! test / app ratio: 1.06! ! ! generated using David A. Wheeler's 'SLOCCount'

19. ! Pull Requests

20. !

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23. ! Feature Flags

24. def live_updates_enabled? logged_in? && current_user.staff? end

25. <% if live_updates_enabled? %> <div class="js-live-update" data-url="<%= live_update_url %>"> <!--

    more pull request template code here ... --> </div> <% end %>

26. def live_updates_enabled?! true! end!

27. ! git co master

28. ! Long lived branches are a smell

29. ! Rails 3

30. ! rails3-redux

31. ! rails3-redux master

32. ! ! ! $ RAILS3=true script/bootstrap Bootstrapping the Rails 3

    gem environment… ! $ script/bootstrap Bootstrapping the Rails 2 gem environment…

33. ! source "https://rubygems.org" ! def rails3? ENV["RAILS3"] end ! if

    rails3? gem "rails", "3.0.20.github11" else gem "rails", "2.3.14.github50" gem "actionmailer", "2.3.14.github50" gem "actionpack", "2.3.14.github50" gem "activerecord", "2.3.14.github50" gem "activesupport", "2.3.14.github50" end ! gem "will_paginate", rails3? ? "3.0.3" : "2.3.9.github"

34. ! ! # Disable plugins on Rails 3 GitHub.only_on_rails_3 do

    config.plugins = [] end ! # Rails 2 needs the session to be configured before initializing GitHub.only_on_rails_2 do require_relative "initializers/session_store" end

35. ! science

36. ! https://github.com/github/dat-science

37. ! require "dat/science" ! class User include Dat::Science ! def

    can_read?(model) science "user-can-read" do |e| e.context :caller => caller, :login => login e.enabled { self.id % 3 == 0 } e.control { model.readable_by?(user) } # old way e.candidate { self.can?(:read, model) } # new way end end end

38. ! Chat Ops

39. !

40. ! /deploy github/my-feature to production /deploy github/my-feature to branch-lab /deploy

    github/my-feature to production/fe1,fe2,fe3 /deploy github to production /ci build github/master /queue me for github
41. None

42. ! Post deploy

43. None
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46. ! Done yet?

47. !

48. None

49. ! Collect Feedback …and act on it

50. ! Getting started today

51. ! Fin

52. ! More adaptable

53. ! More flexible

54. ! More money

55. ! More fun

56. ! Thank You