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DevOps · Concept

CRD

A CustomResourceDefinition (CRD) adds a new resource type to the Kubernetes API. Kubernetes serves and stores its objects, while the CRD defines their names, scope, versions, and schema.

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Syntax

kubectl apply -f crd.yaml
kubectl get <resource>

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  • Custom Resources
  • API Aggregation
  • OpenAPI v3.0 validation
  • Admission Webhooks
  • Finalizers
  • RBAC
  • Custom resource definition versioning

Source: Extend the Kubernetes API with CustomResourceDefinitions. Checked 2026-11-03.