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Section 7: CRDs

Overview​

This section introduces Custom Resource Definitions (CRDs) to extend Kubernetes with custom API objects for domain-specific resources.

Key Concepts​

  • Understanding Kubernetes API extension mechanisms
  • Creating and deploying CRDs
  • Schema validation with OpenAPI v3
  • Custom resource lifecycle management

Example​

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  name: votingapps.example.com
spec:
  group: example.com
  versions:
  - name: v1
    served: true
    storage: true
    schema:
      openAPIV3Schema:
        type: object
        properties:
          spec:
            type: object
            properties:
              replicas:
                type: integer
              image:
                type: string
  scope: Namespaced
  names:
    plural: votingapps
    singular: votingapp
    kind: VotingApp

Coming Soon​

Full content will be added in later phases of this project.