From client-go to controller-runtime: Rebuilding a Kubernetes Controller

📰 Dev.to · Ankur Sinha

Learn how to rebuild a Kubernetes controller using controller-runtime, a more efficient and scalable approach than client-go

intermediate Published 13 Mar 2026
Action Steps
  1. Migrate existing client-go code to controller-runtime
  2. Use the controller-runtime library to build a new Kubernetes controller
  3. Configure and test the controller using the controller-runtime API
  4. Compare the performance and scalability of the new controller with the old client-go implementation
  5. Apply the lessons learned to future Kubernetes controller development projects
Who Needs to Know This

Developers and DevOps engineers working with Kubernetes can benefit from this article to improve their controller-building skills and migrate from client-go to controller-runtime

Key Insight

💡 Controller-runtime provides a more efficient and scalable way to build Kubernetes controllers compared to client-go

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🚀 Rebuild your Kubernetes controller with controller-runtime for better performance and scalability! 🚀

Key Takeaways

Learn how to rebuild a Kubernetes controller using controller-runtime, a more efficient and scalable approach than client-go

Full Article

In my previous article, I built a Kubernetes controller from scratch using client-go, informers, and...
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