My CKA Troubleshooting Playbook

When I started preparing for CKA, I spent most of my time creating Pods, Deployments, and Services.

But during practice exams, I realized something important:

The CKA exam doesn’t just test whether you can create Kubernetes resources. It tests whether you can quickly identify, isolate, and fix problems under pressure.

This article shares the troubleshooting framework I used throughout my preparation and during the exam.

Step 1: Always Start With the Symptoms

Before changing anything:

kubectl get pods -A
kubectl get nodes
kubectl get events -A

Questions:

What is broken?
When did it break?
Is it a Pod issue?
Is it a Node issue?
Is it Networking?
Is it Storage?

Step 2: Pod Troubleshooting

Common issues:

CrashLoopBackOff

kubectl logs pod-name
kubectl describe pod pod-name

Check:

Wrong image
Missing environment variables
Application errors
Failed mounts

ImagePullBackOff

Check:

kubectl describe pod pod-name

Look for:

Invalid image name
Missing imagePullSecrets
Registry access issues

Step 3: Deployment Troubleshooting

Commands:

kubectl get deploy
kubectl describe deploy deployment-name
kubectl rollout status deployment-name

Check:

Replica count
Image version
Labels
Selectors

Step 4: Service Troubleshooting

Verify:

kubectl get svc
kubectl describe svc service-name

Then:

kubectl get endpoints

Big lesson:

A Service without endpoints is usually a label mismatch problem.

Step 5: Networking Troubleshooting

Check DNS:

kubectl exec -it pod-name -- nslookup kubernetes.default

Check connectivity:

kubectl exec -it pod-name -- wget service-name

Check Network Policies:

kubectl get networkpolicy

Step 6: Storage Troubleshooting

Verify:

kubectl get pv
kubectl get pvc

Check:

kubectl describe pvc pvc-name

Common issues:

Pending PVC
Wrong StorageClass
Access mode mismatch

Step 7: Node Troubleshooting

Commands:

kubectl get nodes
kubectl describe node node-name

Check:

Ready status
Taints
Resource pressure
Scheduling issues

Step 8: Use Events Aggressively

Most candidates forget this.

kubectl get events -A --sort-by=.metadata.creationTimestamp

Events often tell you exactly what is wrong.

My Personal CKA Troubleshooting Flow

Observe
 ↓
Describe
 ↓
Logs
 ↓
Events
 ↓
Verify Configuration
 ↓
Apply Fix
 ↓
Test Again

Final Thoughts

The biggest lesson I learned during CKA preparation was that troubleshooting is not about memorizing commands.

It’s about following a repeatable process.

When you develop a systematic troubleshooting mindset, Kubernetes problems become far less intimidating — and that’s exactly the skill the CKA exam is designed to test.