Linux Foundation Certified Kubernetes Administrator CKA Exam Practice Test

Answer : A

solution

Answer : A

kubect1 get pods--sort-by=.metadata.creationTimestamp

Answer : A

Task Overview

You're restoring a MariaDB deployment in the mariadb namespace with persistent data.

Tasks:

SSH into cka000047

Create a PVC named mariadb:

Namespace: mariadb

Access mode: ReadWriteOnce

Storage: 250Mi

Use the existing retained PV (there's only one)

Edit ~/mariadb-deployment.yaml to use the PVC

Apply the deployment

Verify MariaDB is running and stable

Step-by-Step Solution

1 SSH into the correct host

ssh cka000047

Required --- skipping = zero score

2 Inspect the existing PersistentVolume

kubectl get pv

Identify the only existing PV, e.g.:

NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS

mariadb-pv 250Mi RWO Retain Available <none> manual

Ensure the status is Available, and it is not already bound to a claim.

3 Create the PVC to bind the retained PV

Create a file mariadb-pvc.yaml:

cat <<EOF > mariadb-pvc.yaml

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

name: mariadb

namespace: mariadb

spec:

accessModes:

- ReadWriteOnce

resources:

requests:

storage: 250Mi

volumeName: mariadb-pv # Match the PV name exactly

EOF

Apply the PVC:

kubectl apply -f mariadb-pvc.yaml

This binds the PVC to the retained PV.

4 Edit the MariaDB Deployment YAML

Open the file:

nano ~/mariadb-deployment.yaml

Look under the spec.template.spec.containers.volumeMounts and spec.template.spec.volumes sections and update them like so:

Add this under the container:

yaml

CopyEdit

volumeMounts:

- name: mariadb-storage

mountPath: /var/lib/mysql

And under the pod spec:

volumes:

- name: mariadb-storage

persistentVolumeClaim:

claimName: mariadb

These lines mount the PVC at the MariaDB data directory.

5 Apply the updated Deployment

kubectl apply -f ~/mariadb-deployment.yaml

6 Verify the Deployment is running and stable

kubectl get pods -n mariadb

kubectl describe pod -n mariadb <mariadb-pod-name>

Ensure the pod is in Running state and volume is mounted.

Final Command Summary

ssh cka000047

kubectl get pv # Find the retained PV

# Create PVC

cat <<EOF > mariadb-pvc.yaml

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

name: mariadb

namespace: mariadb

spec:

accessModes:

- ReadWriteOnce

resources:

requests:

storage: 250Mi

volumeName: mariadb-pv

EOF

kubectl apply -f mariadb-pvc.yaml

# Edit Deployment

nano ~/mariadb-deployment.yaml

# Add volumeMount and volume to use the PVC as described

kubectl apply -f ~/mariadb-deployment.yaml

kubectl get pods -n mariadb

Answer : A

Solution:

#network.yaml

apiVersion: networking.k8s.io/v1

kind: NetworkPolicy

metadata:

name: allow-port-from-namespace

namespace: internal

spec:

podSelector:

matchLabels: {

}

policyTypes:

- Ingress

ingress:

- from:

- podSelector: {

}

ports:

- protocol: TCP

port: 8080

#spec.podSelector namespace pod

kubectl create -f network.yaml

Answer : A

// create a pod

kubectl run nginx --image=nginx --restart=Never --port=80

// List the pod with different verbosity

kubectl get po nginx --v=7

kubectl get po nginx --v=8

kubectl get po nginx --v=9

Answer : A

kubectl get po --all-namespaces > /opt/pods-list.yaml

Answer : A

solution