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CKA Practice Exam: Part 2

Managing storage is a challenge for most organizations. Kubernetes allows you to create persistent storage so the data is not lost when a pod is moved or deleted. In this portion of the practice exam, you will demonstrate your knowledge of `PersistentVolumes` and `PersistentVolumeClaims` in order to ensure data integrity. This will simulate a question you may see on the Certified Kubernetes Administrator (CKA) exam.

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Path Info

Level

Intermediate

Duration

1h 0m

Last updated

Sep 03, 2025

Challenge

Create the `PersistentVolumeClaim`.
1. Use the following command to check if there is already a 'web' namespace:
```
kubectl get ns
kubectl get pv
```
1. Use the following command to create a PersistentVolumeClaim work from scratch or use a Kubernetes template file. Search the documentation :
```
vi data-pvc.yaml #copy and paste from docs
```
1. Update the file data-pvc.yaml with the following details:
```
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: data-pvc
  namespace: web
spec:
  storageClassName: local-storage
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 256Mi
```
1. Use the following command to create the PVC:
```
kubectl apply -f data-pvc.yaml
```

Challenge

Create a pod mounting the volume and write data to the volume.

Use the following command to create the YAML for a busybox pod:

kubectl run data-pod --image=busybox:1.28 --restart=Never -o yaml --dry-run -- /bin/sh -c 'sleep 3600' > data-pod.yaml

Use the following command to edit the data-pod.yaml file:

vi data-pod.yaml

Update the data-pod.yaml file as below:

apiVersion: v1
kind: Pod
metadata:
  name: data-pod
  namespace: web
spec:
  containers:
  - args:
    - /bin/sh
    - -c
    - sleep 3600
    image: busybox:1.28
    name: data-pod
    resources: {}
    volumeMounts: 
    - name: temp-data
      mountPath: /tmp/data
  dnsPolicy: ClusterFirst
  restartPolicy: Never
  volumes: 
  - name: temp-data
    persistentVolumeClaim:
      claimName: data-pvc

Use the following command to create the pod:

kubectl apply -f data-pod.yaml

Use the following command to connect to the pod:

kubectl exec -it data-pod -n web -- sh

Use the following commands to confirm the environmant and to copy the contents of the etc/passwd file to /tmp/data:

# ls -la /etc/passwd
# ls -la /tmp/data/
# cp /etc/passwd /tmp/data/passwd

Use the following command to list the contents of /tmp/data:

# ls /tmp/data/

Challenge

Delete the pod and create a new pod and view volume data.
1. Use the following command to delete the pod:
```
kubectl delete po data-pod -n web
```
2. Use the following command to modify the pod YAML:
```
vi data-pod.yaml
```
3. Change the following line in the data-pod.yaml file:
```
name: data-pod2
```
4. Use the following command to create a new pod:
```
kubectl apply -f data-pod.yaml
```
5. Use the following command to connect to the pod and view the contents of the volume:
```
kubectl exec -it data-pod2 -n web -- sh

# ls /tmp/data
```

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