Please bring your laptop fully charged as we will have limited charging stations available in the room.To prepare for the session, follow the setup instructions at:
https://bit.ly/2JWsbxCCRDs have become the main vehicle to extend the Kubernetes API. They are ready to build serious products on-top of them. But with more and more features like admission and conversion they are no longer just a hundred lines of YAML, but involve real software development. In this talk/tutorial we will start with a YAML-only CRD project and step-by-step go through the development life-cycle towards a powerful multi-version CRD:
- add schema validation using OpenAPI schema generators
- enable pruning
- add defaulting
- add an admission webhook for powerful turing-complete validation
- evolve the CRD to a new version with a conversion webhook
- including comprehensive testing.
On this journey we will learn a lot of about the expected webhook behaviour, how they fit into API machinery, and about API compatibility and good & bad API practices.
