12 Factor App

A methodology for building modern, scalable, maintainable software-as-a-service apps.

http://bit.ly/erkanerol-12factor

Transcript

1. The principles for SaaS apps THE TWELVE-FACTOR APP Erkan Erol Apprentice Software Craftsman http://bit.ly/erkanerol-12factor
2. Erkan Erol Apprentice Software Craftsman erkan_erol_ erkanerol erkanerol.github.io Software Developer @ SAP Development Center Turkey Co-Organizer @ Software Craftsmanship Turkey Java k8s Linux Web
3. Disclosure
4. http://www.oreilly.com/webops-perf/free/beyond-the-twelve-factor-app.csp
5. http://www.flaticon.com/
6. manifesto describing the rules and guidelines that needed to be followed to build a cloud-native application 2012
7. What is the target?
8. minimize time and cost for new developers joining the project declarative formats for setup automation
9. offering maximum portability between execution environments have a clean contract with the underlying operating system
10. obviating the need for servers and systems administration are suitable for deployment on modern cloud platforms
11. enabling continuous deployment for maximum agility minimize divergence between development and production
12. scale up without significant changes to tooling, architecture, or development practices
13. any language
14. any backing services
15. TWELVE FACTORS
16. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
17. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
18. ONE APP ONE REPO
19. USELESS
20. DISTRIBUTED SYSTEM
22. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
23. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
24. never relies on implicit existence of system-wide packages
25. explicitly declare
26. isolate dependencies
27. Ansible Playbook
28. pom.xml
29. Mommy Server Bootstrapped
30. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
31. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
32. DEV QA PROD what varies between deploys?
33. Code Configuration Credentials
34. treat your apps like open source
35. externalize your configuration Consul ZooKeeper Config Server
36. protect credentials
37. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
38. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
40. the filesystem must be considered ephemeral
41. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
42. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
43. BUILD ✓ Complex processes ✓ Deterministic ✓ Central Build ❌ Configuration ❌ Environment specific ❌ Local Build
44. + ✓ Versioning ✓ Configuration ✓ Deploying different environments ✓ Ready to run ✓ Storing releases ❌ Changing executables RELEASE
45. ✓ Simple ✓ At any time ❌ Live code fixes ❌ Live config changes RUN
46. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
47. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
48. stateless
49. externalize states
50. share nothing
51. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
52. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
53. 8080 /app1 /app2 /app3 8080 8081 8082 exports service by binding to a port
54. everything is a file everything is accessed via its port
55. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
56. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
58. Scaling is the root cause of all evil Scaling is bliss Something is wrong
59. Scaling is bliss
61. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
62. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
63. use and throw
64. short startup time
65. graceful shutdown
66. sensitive to signals
67. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
68. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
69. TIME GAP
70. PERSONAL GAP
71. DEV PROD TOOL GAP
72. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
73. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
74. Logs Are Streams, Not Files
75. ♥stdout♥
76. • Finding specific events in the past. • Large-scale graphing of trends • Active alerting according to user-defined heuristics
77. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
78. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
79. use tool for migrations
81. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
82. Codebase Dependencies Config Backing Services Build, Release, Run Processes Port Binding Concurrency Logs Dev/Prod Parity Disposability Admin Processes
83. Thank you for listening...