Kubernetes CKA sample exam question 25 with answer

Question
A pod my-nginx-pod (image=nginx) in custom namespace is not running. Find the problem and fix it and make it running.
Note: All the supported definition files has been placed at /root

Answer
Get some details:

kubectl -n custom get po

we can see that the pod my-nginx-pod is in the Pending state.
Get more details - look in pod events section:

kubectl -n custom describe po my-nginx-pod

In events we can see that the:

persistentvolumeclaim "pv-claim-log" not found

List all PVs and check the bound for pv-claim-log:

kubectl get pv

we can see that the volume mypvlog is in the Bound state and it's claim to default/pv-claim-log.
Note that the PVCs are namespaced so the namespace should be custom and not default.
So - to fix this, it is needed to recreate PV and PVC. PVC should be in namespace custom:

kubectl delete pvc pv-claim-log
kubectl delete pv mypvlog

Open pvc definition file and add namespace:

..
metadata:
  name: pv-claim-log
  namespace: custom
...

Save and recreate:

kubectl apply -f pv.yaml
kubectl apply -f pvc.yaml

Check, the claim should be in Bound state:

kubectl -n custom get pvc
kubectl get pv

Check the pod status now:

kubectl -n custom get po

Pod is in Running state. This solved the issue.