CODEWITHSUNDEEP
kubernetesoperator-sdk
Joe
Joe

Reputation: 693

How Finalizer work for CustomResouce object?

In Kubernetes and Operator-sdk, we can define CRD (Custom Resource Definition) and CR (Custom Resource). In my operator controller, when a CR is initialized, then the controller reconcillation create a new Deployment and service.

When we delete a CR object, then the associated resources (such as Deployment or service) will be deleted as well at the same time. I understand it should be done by CR Finalizer. But, in Operator-SDK and my controller code, I never see any code to register or add Finalizer for CR, is there any default behavior for Operator-Sdk?

Could anybody point how it work for the case - "while deleting CR, the associated Deployment and Service have deleted as well"? Which part in controller is responsible for that?

Upvotes: 3

Views: 866

Answers (1)

Grigoriy Mikhalkin
Grigoriy Mikhalkin

Reputation: 5573

Deletion of associated resources is not part of a controller. It's done by Kubernetes's garbage collector.

Basically, garbage collector using OwnerReference objects to find orphaned resources and delete them. Most likely, you set OwnerReference by calling controllerutil.SetControllerReference method somewhere in your code.

Upvotes: 4

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