What are the best resources for learning Kubernetes operators in Go?

KodeKloud’s Kubernetes and operator-related notes and courses can be useful for structured learning, especially if you prefer guided lessons and practical exercises.

The Kubebuilder tutorials are a great starting point. They’re comprehensive, practical, and walk through building an operator step by step. The guide at kubebuilder.io is especially useful for getting familiar with the project structure and core concepts.

O’Reilly has a broad collection of Kubernetes and Go books, along with search tools that can help find related material. It isn’t generally free, though, and the selection can lean more toward theory than hands-on operator development. A trial period may be available if you want to evaluate it first.

Definitely read the Kubebuilder book, but spend plenty of time with the controller-runtime documentation too. That’s where many of the important patterns are explained. One subtle issue to understand is that the cache can be stale after creating a resource, so you shouldn’t assume a read immediately after a write will always return the newest state.