Riccardo Padovani • 1/26/2025

How Kubernetes picks which pods to delete during scale-in

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This technical article details the internal algorithm Kubernetes uses to decide which pods to terminate when scaling down a deployment. It covers the role of the ReplicaSet controller, the eight sorting rules for pod selection, and how developers can influence the process using the `controller.kubernetes.io/pod-deletion-cost` annotation.

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#algorithm #Kubernetes #Replicaset
How Kubernetes picks which pods to delete during scale-in

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