What are some advanced examples of Kubernetes Custom Resource Definitions (CRDs)?

What are some advanced examples of Kubernetes Custom Resource Definitions (CRDs)?

Kubernetes CRDs allow you to extend Kubernetes capabilities. Advanced examples include custom controllers for managing complex applications, like a GitOps operator or a custom resource for managing machine learning models.

Can you explain how to create a custom controller for a CRD?

To create a custom controller, you typically use a client library like controller-runtime. You'll define your CRD, implement the controller logic to handle events, and then deploy it to your cluster.

What are the best practices for managing CRDs?

Best practices include versioning your CRDs, using validation schemas, and ensuring proper RBAC permissions for your custom resources.

How do I handle versioning for my CRDs?

You can handle versioning by defining multiple versions in your CRD manifest and using the versions field. This allows you to manage upgrades and deprecations smoothly.