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CloudNative/Kubernetes/Base/CRD.md

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+```
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  # name must match the spec fields below, and be in the form: <plural>.<group>
+  name: crontabs.stable.example.com
+spec:
+  # group name to use for REST API: /apis/<group>/<version>
+  group: stable.example.com
+  # versions to use for REST API: /apis/<group>/<version>
+  versions:
+  - name: v1beta1
+    # Each version can be enabled/disabled by Served flag.
+    served: true
+    # One and only one version must be marked as the storage version.
+    storage: true
+  - name: v1
+    served: true
+    storage: false
+  # either Namespaced or Cluster
+  scope: Namespaced
+  names:
+    # plural name to be used in the URL: /apis/<group>/<version>/<plural>
+    plural: crontabs
+    # singular name to be used as an alias on the CLI and for display
+    singular: crontab
+    # kind is normally the CamelCased singular type. Your resource manifests use this.
+    kind: CronTab
+    # shortNames allow shorter string to match your resource on the CLI
+    shortNames:
+    - ct
+```