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The CKA Certification is highly sought after by organizations that are looking to adopt Kubernetes as their container orchestration platform. Certified Kubernetes Administrator (CKA) Program Exam certification ensures that the candidate has a deep understanding of Kubernetes and can effectively manage and troubleshoot Kubernetes applications. This makes the candidate a valuable asset to any organization that is looking to deploy Kubernetes in production.
NEW QUESTION # 48
You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000047
Task
A MariaDB Deployment in the mariadb namespace has been deleted by mistake. Your task is to restore the Deployment ensuring data persistence. Follow these steps:
Create a PersistentVolumeClaim (PVC ) named mariadb in the mariadb namespace with the following specifications:
Access mode ReadWriteOnce
Storage 250Mi
You must use the existing retained PersistentVolume (PV ).
Failure to do so will result in a reduced score.
There is only one existing PersistentVolume .
Edit the MariaDB Deployment file located at ~/mariadb-deployment.yaml to use PVC you created in the previous step.
Apply the updated Deployment file to the cluster.
Ensure the MariaDB Deployment is running and stable.
Answer:
Explanation:
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
NEW QUESTION # 49
Score: 7%
Task
Reconfigure the existing deployment front-end and add a port specification named http exposing port 80/tcp of the existing container nginx.
Create a new service named front-end-svc exposing the container port http.
Configure the new service to also expose the individual Pods via a NodePort on the nodes on which they are scheduled.
Answer:
Explanation:
Solution:
kubectl get deploy front-end
kubectl edit deploy front-end -o yaml
#port specification named http
#service.yaml
apiVersion: v1
kind: Service
metadata:
name: front-end-svc
labels:
app: nginx
spec:
ports:
- port: 80
protocol: tcp
name: http
selector:
app: nginx
type: NodePort
# kubectl create -f service.yaml
# kubectl get svc
# port specification named http
kubectl expose deployment front-end --name=front-end-svc --port=80 --tarport=80 --type=NodePort
NEW QUESTION # 50
Create a busybox pod and add "sleep 3600" command
Answer:
Explanation:
kubectl run busybox --image=busybox --restart=Never -- /bin/sh -c
"sleep 3600"
NEW QUESTION # 51
Score: 4%
Task
Set the node named ek8s-node-1 as unavailable and reschedule all the pods running on it.
Answer:
Explanation:
See the solution below.
Explanation
SOLUTION:
[student@node-1] > ssh ek8s
kubectl cordon ek8s-node-1
kubectl drain ek8s-node-1 --delete-local-data --ignore-daemonsets --force
NEW QUESTION # 52
Verify certificate expiry date for ca certificate in /etc/kubernetes/pki
Answer:
Explanation:
openssl x509 -in ca.crt -noout -text | grep -i validity -A 4
NEW QUESTION # 53
......
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