A building-permits application hard-coded a Pod IP in its config an…

Question

A building-permits application hard-coded a Pod IP in its config and failed after the Pod was rescheduled to another node. Which change restores stable reachability for other in-cluster callers?

Accepted Answer

Create a Service that selects the Pods by label and update callers to use the Service DNS name or ClusterIP instead of the Pod IP. — Hard-coding a Pod IP is like tattooing today's taxi plate on the office door — the next cab has a new plate. Point callers at a Service DNS/ClusterIP so Kubernetes keeps the directory up to date.

Answer

Pin the Pod to a static HostNetwork IP equal to the node's primary address and disable the CNI.

Answer

Add a PersistentVolumeClaim so the Pod IP is written into cluster storage and reused on restart.

Answer

Replace the Deployment with a Job so the same Pod object identity is guaranteed forever.

A building-permits application hard-coded a Pod IP in its config and failed after the Pod was rescheduled to another node. Which change restores stable reachability for other in-cluster callers?

Short Explanation

Full Explanation