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| Section | Weight | Objectives |
|---|---|---|
| Cluster Architecture, Installation & Configuration | 25% | - Kubernetes architecture components - Cluster installation and configuration - High availability setup |
| Services & Networking | 20% | - Services (ClusterIP, NodePort, LoadBalancer) - Ingress configuration - Network policies |
| Workloads & Scheduling | 15% | - Scheduling constraints - Deployments and rolling updates - ConfigMaps and Secrets |
| Troubleshooting | 30% | - Cluster component troubleshooting - Application and networking debugging |
| Storage | 10% | - Storage classes - PersistentVolumes and PersistentVolumeClaims |
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NEW QUESTION # 83
Schedule a pod as follows:
* Name: nginx-kusc00101
* Image: nginx
* Node selector: disk=ssd
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION # 84
Create a deployment as follows:
* Name: nginx-random
* Exposed via a service nginx-random
* Ensure that the service & pod are accessible via their respective DNS records
* The container(s) within any pod(s) running as a part of this deployment should use the nginx Image Next, use the utility nslookup to look up the DNS records of the service & pod and write the output to
/opt/KUNW00601/service.dns and /opt/KUNW00601/pod.dns respectively.
Answer:
Explanation:
See the solution below.
Explanation
Solution:
NEW QUESTION # 85
Score: 4%
Task
Check to see how many nodes are ready schedulable (not including nodes tainted NoSchedule ) and write the number to /opt/KUSC00402/kusc00402.txt.
Answer:
Explanation:
Solution:
kubectl describe nodes | grep ready|wc -l
kubectl describe nodes | grep -i taint | grep -i noschedule |wc -l
echo 3 > /opt/KUSC00402/kusc00402.txt
#
kubectl get node | grep -i ready |wc -l
# taints#noSchedule
kubectl describe nodes | grep -i taints | grep -i noschedule |wc -l
#
echo 2 > /opt/KUSC00402/kusc00402.txt
NEW QUESTION # 86
You have a pod that uses a PersistentVolumeClaim for its storage. The pod is deleted, but the data on the volume is still present. Explain why the data is not deleted and how you can change this behavior.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
When a pod is deleted, the data on the volume is not automatically deleted by default. This is because the persistentVolumeReclaimPolicy' for the PersistentVolume is set to 'Retain' by default. This policy ensures that the volume is not deleted when the pod is deleted, preserving the data.
To delete the data when the pod is deleted, you need to modify the persistentVolumeReclaimPolicy' to 'Delete'. Here's how:
1. Update the PersistentVolume:
- Update the 'persistentVolumeReclaimPolicy' to 'Delete' in the PersistentVolume definition.
2. Apply the Changes: - Apply the updated PersistentVolume definition using 'kubectl apply -f my-pv.yaml'. Now, when the pod using this PersistentVolume is deleted, the volume and the data will also be deleted automatically.
NEW QUESTION # 87
You are deploying a highly sensitive application to a Kubernetes cluster. You need to configure CoreDNS to enforce strict access control and ensure that only authorized clients can perform DNS lookups.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Enable DNSSEC Validation:
- Configure CoreDNS to validate DNSSEC signatures to ensure that DNS responses are not tampered with.
2. Use Network Policies: - Implement network policies to restrict access to the CoreDNS service. Only authorized pods should be allowed to send DNS queries to CoreDNS.
3. Use RBAC for Access Control: - Implement Role-Based Access Control (RBAC) to restrict access to CoreDNS resources. Only authorized users or service accounts should be able to modify the CoreDNS configuration or access its logs.
4. Use Secure DNS: - Enable DNS over TLS (DOT) or DNS over HTTPS (DOH) to secure communication between pods and CoreDNS. This will prevent eavesdropping and data tampering.
NEW QUESTION # 88
......
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