After a rollout every Pod has a new IP. What does a Service add?

Question

Accepted Answer

One virtual IP and DNS name that always routes to whichever Pods exist now — A Service is a stable front door: its ClusterIP and DNS name never change, while the set of Pods behind it is recalculated from a label selector as Pods appear and disappear. Pod IPs themselves are never stable — a restarted Pod gets a new one. Per-Pod DNS exists only for headless Services, and no proxy Pod is created; the routing lives in each node's packet rules.

Answer

One fixed IP per Pod, which that Pod keeps across restarts and rescheduling

Answer

One DNS record per Pod, which the kubelet updates as Pods come and go

Answer

One proxy Pod that holds client connections open while the others restart

After a rollout every Pod has a new IP. What does a Service add?

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