CRDs in Kubernetes — Teach Your Cluster New Words
Denish Tomar

Denish Tomar @denish3436

About: DevRel at Qumulus | Tech Blogger | Open-Source Contributor | Passionate about Cloud-Native & DevOps

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Mar 17, 2025

CRDs in Kubernetes — Teach Your Cluster New Words

Publish Date: Apr 19
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Ever wish Kubernetes could just understand your app’s needs out of the box?

Well… it actually can — with CRDs (Custom Resource Definitions).


🤔 What Are CRDs?

CRDs are a way to teach Kubernetes new words — letting you define custom objects beyond what’s built-in (Pod, Service, Deployment, etc.).

They’re the magic sauce behind tools like ArgoCD and Kyverno.


✨ Why Use CRDs?

Imagine wanting Kubernetes to manage something like:

  • DatabaseCluster
  • BackupSchedule
  • TaskRunner

Image description
With CRDs, you can define these as native-looking resources, so you can:


bash
kubectl get backupSchedules
kubectl apply -f my-database-cluster.yaml
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