k8s: Kubernetes v1.35: Watch Based Route Reconciliation in the Cloud Controller Manager

Kubernetes v1.35 introduces an alpha feature gate (CloudControllerManagerWatchBasedRoutesReconciliation) in k8s.io/cloud-provider that changes the CCM route controller from a fixed-interval reconciliation to a watch/informer-based trigger model. The change reduces unnecessary cloud API calls by reconciling routes only when relevant node or CIDR/address fields change, with an additional randomized periodic reconcile every 12–24 hours. The reconciliation logic itself is unchanged and the feature is enabled via –feature-gate.

• Source: Kubernetes Official Blog