Understanding API Internals

1. Understanding the Kubernetes API Internals By Nabarun Pal and Nikhita Raghunath
2. 2 Source: https://kubernetes.io/docs/concepts/overview/components/
3. 3 Group git.k8s.io/kubernetes/staging/src/k8s.io/api
4. 4 Version
5. 5 Kind
6. 6 Group-Version-Kind (GVK) apps.v1/Deployment Group Version Kind
7. 7 Group-Version-Resource (GVR) /apis/apps/v1/namespaces/{namespace}/deployments Group Version Resource /api/v1/namespaces/{namespace}/pods
8. Relation between GVK and GVR 8
9. 9 External Types v/s Internal Types
10. 1 0 Codebase walkthrough To import the codebase walkthrough in VS Code, please see this gist.
11. 11 Conversion v1 Storage Version
12. 12 Conversion v1 v1beta1 Storage Version Input Version
13. 13 Conversion v1 v1beta2 Storage Version Input Version
14. 14 Conversion v1 v1beta3 Storage Version Input Version
15. 15 Conversion v1 v1beta1 Storage Version Input Version
16. 16 Conversion v1 internal v1beta1 Storage Version “Hub” Version Input Version
17. 17 Conversion v1 internal v1beta2 Storage Version “Hub” Version Input Version
18. 18 Conversion v1 internal v1beta3 Storage Version “Hub” Version Input Version
19. 19 Conversion v1 internal v1beta1 Storage Version “Hub” Version Input Version
20. 20 Conversion and Defaulting v1 internal v1beta1 Storage Version “Hub” Version Input Version
21. 21 Decoding v1beta1 Input Version internal “Hub” Version Serialization, Defaulting and Conversion
22. 22 Admission v1 internal “Hub” Version Admission Mutating Validating
23. 23 Registry v1 internal “Hub” Version Admission Mutating Validating Registry BeforeCreate Validation
24. 24 Encoding v1 internal “Hub” Version Admission Mutating Validating Registry BeforeCreate Validation Encoding Conversion Defaulting Deserialization
25. 2 5 Codebase walkthrough To import the codebase walkthrough in VS Code, please see this gist.
26. 26 CRDs and Aggregated Apiservers They follow the same pattern • CRDs - staging/src/k8s.io/apiextensions-apiserver • Aggregated Apiservers - staging/src/k8s.io/kube-aggregator (We won’t be covering them in detail in this talk)
27. Thank you! 2 7 Feedback Link