Operator pattern
Glossary Page
The Operator pattern is a design approach that connects one or more custom resources to a Controller. With Kubernetes, you can expand the built-in controllers by introducing new ones to your cluster. An instance of the Operator pattern is when a running application functions as a controller and has API access to perform actions against a custom resource that has been defined in the control plane. By doing so, the Operator pattern can automate complex, application-specific tasks within the Kubernetes environment.
https://kubernetes.io/docs/reference/glossary/?all=true
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