Missing Piece of Kubernetes Operators

Sun, 19 Apr 2026 00:00:00 +0000

Introduction#

My journey with Kubernetes operators started more than three years ago, and since then I’ve built a few more, mostly for managing external resources, because I really like the idea of treating Kubernetes as a universal API. Before getting to the point, I’d highly suggest reading through Ahmet’s blog post on controller pitfalls if you’re not familiar with the operator pattern, or if you want to see some of the common mistakes in operator development. That post was the main motivator for me to understand controller-runtime deeply and eventually, to build kube-external-watcher, which is what this post is about.

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Missing Piece of Kubernetes Operators

Introduction#