Kubernetes Services Give Changing Pods a Stable Name and IP

Pods in Kubernetes are disposable and receive new IP addresses whenever they are replaced, which breaks any app that hardcoded an IP. A Service solves this by providing one stable name and virtual cluster IP that routes traffic to a changing set of matching Pods. The Service selects Pods by label, tracks their current addresses through EndpointSlices, and uses kube-proxy on each node to forward traffic. Cluster DNS, served by CoreDNS, automatically creates records for every Service so applications can reach each other by name without configuration. The tutorial demonstrates this with a three-replica Deployment and a ClusterIP Service tested from a temporary client Pod.