Bootiful Kubernetes Operators
summary
Shows how to extend Kubernetes with a custom v1Foo CRD (one string field) and a Java reconciler that creates or updates a Deployment of three nginx replicas. Uses the official Kubernetes Java client, codegen to produce Java CRD types, and Spring Boot + Spring Native to build a GraalVM native image that boots in ~0.044s and uses ~63 MB RSS. Demo applies the CRD, creates the Foo instance, and the controller successfully creates the Deployment and pods. Repository: github.com/kubernetes-native-java/controllers-101
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chapters (12)
- 0:00Kubernetes Operators intro
- 1:25Why controllers matter
- 4:13Controllers reconcile state
- 7:21Custom Resource Definitions and Controllers
- 15:43KPack CR example
- 21:22Foo operator with Spring Boot
- 28:21Defining the Custom Resource Definition
- 34:54Java types for CRDs
- 36:19Reconciler logic
- 42:14Deploy operator as native image
- 45:05Live demo: Foo operator
- 46:50Closing & Q&A
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