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The feedback loops behind Kubernetes — PlanetScale

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Kubernetes is a framework for feedback controllers: write down what you want, observe what exists, make the next change, and repeat.

The feedback loops behind Kubernetes Fatih Arslan [ @ fatih ] | June 16, 2026 For the last decade, Kubernetes has been the backdrop to most of my work: operating clusters, helping build hosted Kubernetes, and writing Kubernetes operators. At PlanetScale, that now means running stateful systems like Postgres and MySQL in production. Kubernetes has many faces, but here I want to talk about one face only: why it is so good at running workloads at scale. People ask me what an operator actually does. The canonical answer is: "it reconciles desired state." This is correct, but it also tells you almo

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