12 Factor Applications

A talk about 12 Factor Application manifesto, describing the factors, how they evolved and new factors for "modern" applications and infrastructures.

Transcript

1. 12 Factor Apps Cloud native good practices Yeray Darias Camacho @ydarias
2. @ydarias yeray.darias at ibm.com
3. Disclaimer
5. The Ivory Tower
7. “Microservices are the new Agile, everybody uses it, but nobody knows how it works” Somebody
9. Some context first
10. 2016 2014 Kubernetes 2012 2007 H eroku 2006 AW S 12 Factor Apps Beyond 12 Factor Apps 2019
13. What is it?
14. It is a manifesto!!!
15. The original 12 factors
16. Codebase
17. "dependencies": { "@types/app-root-path": "^1.2.4", "@types/lodash": "^4.14.123", "@types/mongodb": "^3.1.22", "@types/node": "^11.13.0", "app-root-path": "^2.2.1", "lodash": "^4.17.11", "moment": "^2.24.0", "mongodb": "^3.2.2", "winston": "^3.2.1" }
19. “Organizations ... are constrained to produce designs which are copies of the communication structures of these organizations” Conway’s law
20. Dependencies
21. dependencies { compile('org.springframework.boot:spring-boot-starter-web') compile('org.springframework.boot:spring-boot-starter-jetty') compile('org.springframework.boot:spring-boot-starter-actuator') compile('org.springframework.boot:spring-boot-starter-data-jpa') compile('org.springframework.boot:spring-boot-starter-security') compile('net.bull.javamelody:javamelody-spring-boot-starter:1.75.0') compile('io.springfox:springfox-swagger2:2.9.2') compile('io.springfox:springfox-swagger-ui:2.9.2') testCompile('org.springframework.boot:spring-boot-starter-test') testCompile('org.mockito:mockito-core') }
22. The goal is to have a repeatable deployment
23. Config
24. spring: datasource: url: jdbc:h2:~/development username: sa password: driver-class-name: org.h2.Driver --- spring.profiles: staging spring: datasource: url: jdbc:postgresql://sl-us-south-1-portal.50.dblayer.com:15843/my-db username: db-user password: m1passw0rdm0l0n driver-class-name: org.postgresql.Driver
25. spring: datasource: url: jdbc:h2:~/development username: sa password: driver-class-name: org.h2.Driver --- spring.profiles: staging spring: datasource: url: jdbc:postgresql://sl-us-south-1-portal.50.dblayer.com:15843/my-db username: ${DB-USERNAME} password: ${DB-PASSWORD} driver-class-name: org.postgresql.Driver
26. spring: datasource: url: jdbc:${DB-CONNECTION} username: ${DB-USERNAME} password: ${DB-PASSWORD} driver-class-name: org.postgresql.Driver
28. Backing services
29. spring: datasource: url: jdbc:${DB-CONNECTION} username: ${DB-USERNAME} password: ${DB-PASSWORD} driver-class-name: org.postgresql.Driver
30. Build, release, run
32. Processes
33. npm run start
34. Port binding
35. > foo-package@1.0.0 postinstall /Users/yeraydarias/sandbox/foo-package > node index.js Server running at http://127.0.0.1:1337/
36. Concurrency
37. apiVersion: autoscaling/v2beta1 kind: HorizontalPodAutoscaler metadata: name: {{ .Release.Name }}-autoscaling labels: app: {{ .Release.Name }} spec: scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: {{ .Release.Name }}-deployment minReplicas: {{ .Values.replicaCount }} maxReplicas: {{ .Values.replicaMax }}
38. Disposability
39. Dev/prod parity
40. Logs
42. Admin processes
43. “One-off admin processes should be run in an identical environment as the regular long-running processes of the app”
44. “They run against a release, using the same code and config as any process run against that release”
45. “Admin code must ship with application code to avoid synchronization issues”
46. bundle exec rake db:migrate
47. Hmm … OK?
49. Beyond the original 12 factors
50. Telemetry
51. Authentication & Authorization
52. “Security is a vital part of any application and cloud environment”
53. “Security is a vital part of any application and cloud environment”
55. And microservices?
56. Traceability
60. Resiliency
61. public float calculatePolarityOf(Argument argument) { var decoratedSupplier = CircuitBreaker.decorateCheckedSupplier( circuitBreaker, () -> innerPolarityCalculationOf(argument)); var decoratedRetrier = Retry.decorateCheckedSupplier( retry, decoratedSupplier); return Try.of(decoratedRetrier).getOrElse(0f); }
62. @HystrixCommand(fallbackMethod = "reliable") public String readingList() { URI uri = URI.create("http://localhost:8090/recommended"); return this.restTemplate.getForObject(uri, String.class); } public String reliable() { return "Cloud Native Java (O'Reilly)"; }
64. Sorted factors
65. • Stateless process • Single repository per application • Configuration • Dependencies • Backing services • Build, release, run • Administrative processes ?
66. Reading list
67. “Books”
68. Videos
69. Thanks