Fix Service Selector

In namespace default, Deployment web-app is running, but the Service web-svc that should route traffic to it is returning no endpoints — requests never reach the Pods.

Solve this on a real cluster — free → All CKAD tasks

🗓️ Free Task of the Week: one CKAD task is unlocked free for everyone every week — no card, real cluster, auto-graded (2 tries/week). Create a free account and check whether this one is live now.

The task

Task

In namespace default, Deployment web-app is running, but the Service web-svc that should route traffic to it is returning no endpoints — requests never reach the Pods.

Goal

Investigate why the Service is not selecting the Deployment's Pods, then correct the Service so it routes to the web-app Pods.

This exercises reading a Service selector, comparing it against the Pod labels, and fixing the mismatch — one of the most common CKAD troubleshooting patterns.

Exam

CKAD

Domain

Application Observability and Maintenance

Grading

Programmatic · partial credit

Reference

Kubernetes docs ↗

What this tests

Configure liveness, readiness, and startup probes, read logs, and debug running workloads. On the CKAD exam, Application Observability and Maintenance tasks are graded purely on what you build in the cluster — not multiple choice — so the only way to get faster is to do them on a real cluster against a clock.

Practice it for real

prepium.sh drops you into your own isolated Kubernetes cluster in the browser — no install, no credit card. You solve the task in a real terminal, hit validate, and a programmatic checker scores exactly what you got right and wrong (with partial credit). The canonical solution unlocks after you attempt it, so you learn the fast, exam-ready way to do it.

Start free → CKAD overview