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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q83-Q88):

NEW QUESTION # 83
Set the node namedek8s-node-1asunavailable and reschedule all thepods running on it.

Answer:

Explanation:
See the solution below.
Explanation
solution

NEW QUESTION # 84
You have a Kubernetes cluster where different teams manage applications in different namespaces. You want to enable a team to manage their resources in a specific namespace while preventing them from accessing resources in other namespaces.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Create a ServiceAccount for the team:

2. Create a ClusterRole for the team:

3. Create a ClusterRoleBinding that binds the ClusterRole to the ServiceAccount and restricts access to a specific namespace:

4. Replace 'team-sa', 'team-namespace', and 'team-clusterrole' with the actual names. 5. Test the configuration by creating a deployment as the ServiceAccount in the assigned namespace and verifying that you can't access resources in other namespaces.

NEW QUESTION # 85
Score: 7%

Task
First, create a snapshot of the existing etcd instance running at https://127.0.0.1:2379, saving the snapshot to /srv/data/etcd-snapshot.db.

Next, restore an existing, previous snapshot located at /var/lib/backup/etcd-snapshot-previo us.db

Answer:

Explanation:
Solution:
#backup
ETCDCTL_API=3 etcdctl --endpoints="https://127.0.0.1:2379" --cacert=/opt/KUIN000601/ca.crt --cert=/opt/KUIN000601/etcd-client.crt --key=/opt/KUIN000601/etcd-client.key snapshot save /etc/data/etcd-snapshot.db
#restore
ETCDCTL_API=3 etcdctl --endpoints="https://127.0.0.1:2379" --cacert=/opt/KUIN000601/ca.crt --cert=/opt/KUIN000601/etcd-client.crt --key=/opt/KUIN000601/etcd-client.key snapshot restore /var/lib/backup/etcd-snapshot-previoys.db

NEW QUESTION # 86
List the nginx pod with custom columns POD_NAME and POD_STATUS

Answer:

Explanation:
kubectl get po -o=custom-columns="POD_NAME:.metadata.name,
POD_STATUS:.status.containerStatuses[].state"

NEW QUESTION # 87
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 # 88
......

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