Kubernetes CRD

Native Kubernetes API extension mechanism.

Definition

CRD v1 (K8s 1.16+) supports structural schemas with OpenAPI v3, conversion webhooks (multi-version), admission webhooks (validation, defaulting, mutating). Foundation of Operators (controller + CRD). 1000+ public CRDs on operatorhub.io. Patterns: Helm Chart, Operator Framework, Kustomize.

Origin

Kubernetes SIG API Machinery, ThirdPartyResource (TPR) K8s 1.2 (March 2016) then CRD K8s 1.7 (June 2017) beta, GA 1.16 (Sept 2019).

Usage

Foundation of the entire modern Kubernetes ecosystem (Istio, Argo CD, Tekton, Crossplane, Prometheus Operator, Cert-Manager).

Related terms

• Kubernetes — plateforme parent.
• Kubernetes Operator — pattern bâti sur CRD.
• OpenAPI — standard schema utilisé.