crd.yaml

apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  # name must be in the form: plural.group
  name: clustercrontabss.stable.example.com
spec:
  # group name to use for REST API: /apis/<group>/<version>
  group: stable.example.com
  # version name to use for REST API: /apis/<group>/<version>
  version: v1
  # either Namespaced or Cluster
  scope: Namespaced
  names:
    # plural name to be used in the URL: /apis/<group>/<version>/<plural>
    plural: clustercrontabss
    # singular name to be used as alias on the CLI and for display
    singular: clustercrontabs
    # kind is normally the CamelCased singular type. Your resource manifests use this
    kind: ClusterCronTabs
    # shortNames allow shorter string to match your resource on the CLI
    shortNames:
    - cct

instance.yaml

apiVersion: "stable.example.com/v1"
kind: ClusterCronTabs
metadata:
  name: parent-cluster-cron
spec:
  cronSpec: "* * * * /5"
  image: my-awesome-cron-image