Feature Toggles! - Ruby

Feature toggles são uma técnica muito versátil para ajudar o trabalho de disponibilizar novas funcionalidades em produção sem quebrar a experiência de clientes e fazer entregas graduais, mas acabamos aprendendo sobre toggles de uma forma superficial no dia a dia.

Vamos ver um pouco do passado e presente do uso de features toggles, a sua facilidade de uso graças a gem flipper e considerações a serem feitas sobre como e quando usar toggles na sua aplicação

Transcript

1. Feature toggles
2. @lucasmazza https://afterhours.io
3. https://magnetis.workable.com
4. Feature Toggles 101
5. https://martinfowler.com/bliki/FeatureToggle.html
7. ❔
10. http://code.flickr.net/2009/12/02/flipping-out/ “Flickr is somewhat unique in that it uses a code repository with no branches; everything is checked into head, and head is pushed to production several times a day. ”
11. “Flags allow us to restrict features to certain environments, while still using the same code base on all servers.” http://code.flickr.net/2009/12/02/flipping-out/
12. “How do you use Continuous Integration to keep everyone working on the mainline without revealing a half- implemented feature on your releases? ” https://martinfowler.com/bliki/FeatureToggle.html
13. Trunk based development + Mudanças demoradas = FEATURE TOGGLEs
15. “Feature Toggles are a powerful technique, allowing teams to modify system behavior without changing code.” https://martinfowler.com/articles/feature-toggles.html
16. https://martinfowler.com/articles/feature-toggles.html
17. release toggles
18. ↗ ↘ ✅ ➡ ➡
19. ops toggles
20. ↗ ↘ ☁ ➡ ➡
21. http://confreaks.tv/videos/rubyconf2014-easy-rewrites-with-ruby-and-science
22. permission toggles
24. experiment toggles
25. https://martinfowler.com/articles/feature-toggles.html
27. NEW_SHINY_THING_ENABLED=1 bin/rails s
28. # config/toggles.yml development: shiny_new_thing: true production: shiny_new_thing: false
30. jnunemaker/flipper
31. gem 'flipper' gem 'flipper-redis' gem 'flipper-ui'
32. # config/initializers/flipper.rb Flipper.configure do |config| config.default do adapter = Flipper::Adapters::Redis.new(Redis.new) Flipper.new(adapter) end end
33. class DashboardsController < ApplicationController def show if Flipper.enabled?(:new_dashboard, current_user) render 'dashboards/new_dashboard' else render 'dashboards/current_dashboard' end end end
34. Adapters & Gates & Plugins
35. ADAPTERS Flipper::Adapters::Memory Flipper::Adapters::Http flipper-activerecord flipper-active_support_cache_store flipper_dalli flipper_mongo flipper_redis flipper_sequel flipper_consul
36. Gates Boolean Actor Group % of Actors % of Time
37. boolean gate Flipper.enabled?(:feature_name) # => false Flipper.enable(:feature_name) Flipper.enabled?(:feature_name) # => true
38. aCTOR gate class User def flipper_id "User:#{to_param}" end end Flipper.enabled?(:feature_just_for_you, current_user) Flipper.enable_actor(:feature_just_for_you, User.find(1))
39. GROUP gate Flipper.register(:staff_users) do |actor| actor.respond_to?(:staff?) && actor.staff? end Flipper.enabled?(:staff_panel, current_user) Flipper.enable_group(:staff_panel, :staff_users)
40. GROUP gate Flipper.register(:staff_users) do |actor| actor.respond_to?(:staff?) && actor.staff? end Flipper.register(:premium_clients) do |actor| actor.respond_to?(:subscription) && actor.subscription.plan_name == :premium end
41. % gates Flipper.enable_percentage_of_actors(:new_search, 33) Flipper.enabled?(:new_search, User.find(1)) # => false Flipper.enabled?(:new_search, User.find(2)) # => false Flipper.enabled?(:new_search, User.find(3)) # => true Flipper.enable_percentage_of_time(:v2_header, 50) Flipper.enabled?(:v2_header) # => false Flipper.enabled?(:v2_header) # => true
42. UI
43. UI # config/routes.rb Rails.application.routes.draw do mount Flipper::UI.app(Flipper) => ‘/flipper/api’ end
44. API # config/routes.rb Rails.application.routes.draw do mount Flipper::Api.app(Flipper) => '/flipper' end
47. “Release toggles are a useful technique and lots of teams use them. However they should be your last choice when you're dealing with putting features into production.” https://martinfowler.com/bliki/FeatureToggle.html
48. feature toggles são uma ferramenta de disponibilização de software
49. configurações da app não são toggles
50. configurações da app não são toggles toggle ou regra de negócio?
51. configurações da app não são toggles toggle ou regra de negócio? qual a diferença entre manter vs remover?
52. configurações da app não são toggles toggle ou regra de negócio? qual a diferença entre manter vs remover? será que não é só trauma de deploys ruins?
53. testes
54. testes servidores e clientes
55. testes servidores e clientes bancos de dados e serviços externos
56. feature toggles eventualmente são débitos técnicos
57. planejar e priorizar remoções
58. planejar e priorizar remoções testes de expiração
59. planejar e priorizar remoções testes de expiração limites de inventário
60. https://martinfowler.com/articles/feature-toggles.html
62. @lucasmazza https://speakerdeck.com/lucas Obrigado :)