âš¡ TL;DR Four things about controller mechanics are widely half-understood: what Reconcile receives, where its work comes from, what a periodic resync is, and what a predicate turns off. I built an operator, broke it five ways, and measured each mechanism directly. The reconcile function runs in 2.
Source: [Dev.to](https://dev.to/kirponik/what-a-kubernetes-controller-actually-does-when-you-break-something-58ef)