Como Kubernetes Operators pode me ajudar na criação e testes de APIs usando Open API Specification

Vou fazer uma breve introdução a definição de Operators Patterns, criando um operador que pode ajudar na criação, definição e testes/mocks de APIs habilitando a utilizacao do conceito denominado API First Design bastante importante na criacao de APIs X Microservices.

Transcript

1. K8s Operators & Open APIs Como Kubernetes Operators pode me ajudar na criação e testes de APIs usando Open API Specification
2. Claudio E. de Oliveira Sr. Software Engineer @ZUP Innovation Java & Golang K8s, Docker & Mesh
3. 1 - Open API Spec 4 - Putting all together 3 - k8s Operator 2 - API First Principle Agenda Agenda
4. Microservices Explosion Microservices Explosion
6. Things to think about... ▰ Microservices are developed by != teams (communication) ▰ Many interactions between services ▰ Ecosystem turns to complex and hard to understand
7. Documentation should be the way that teams “talking”
8. Do it using Open API Spec… for REST APIs
9. The OpenAPI Specification (OAS) defines a standard, programming language-agnostic interface description for REST APIs, which allows both humans and computers to discover and understand the capabilities of a service without requiring access to source code What is Open API Spec
12. API First Design API First Design
13. What API First Means??? An API-first approach means that for any given development project, your APIs are treated as “first-class citizens.”
14. Your API should be designed with with users in mind. Think in consumption in first place.
15. How it works??? An API-first approach involves developing APIs that are consistent and reusable, which can be accomplished by using an API description language to establish a contract for how the API is supposed to behave
17. Advantages ▰ Increase the speed to market ▰ Ensures good developer experiences Development teams can work in parallel How to achieve it???
18. API Mocks can be a good way to deliver API consumption for other teams
19. For Contract Tests Consumption Tests Test API Design
20. How we can create automatization for it???
21. Open API has a example section that make our service clearer to consumption also we can use some tool to help with mocks
23. k8s Controllers
24. Everything in kubernetes are events
25. Kubernetes Controllers Kubernetes controllers receive these events and then we can extend kubernetes features It is a program that can react a k8s events golang, python, java...etc
28. wait...what is Desired State???
30. Custom Resource A resource is an endpoint in the Kubernetes API that stores a collection of API objects of a certain kind POD is built-in Kind Deployment is built-in Kind Service is built-in Kind APIMock is not a built-in kind is a Custom Resource
31. Custom Resource Definition C - Custom R - Resource D - Definition
32. CRD is the way to tell instructions to kubernetes some Custom Resources properties like “template”
33. k8s Operator “An Operator is a Controller that uses a CRD to encapsulate operational knowledge for a specific application in an algorithmic and automated form. The Operator pattern allows us to extend the Controller pattern from the preceding chapter for more flexibility and greater expressiveness.” from Kubernetes Patterns Book
34. Let’s put everything together Let’s put everything together
40. Obrigad_!