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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshooting | 30% | - Application and networking debugging - Cluster component troubleshooting |
| Topic 2: Workloads & Scheduling | 15% | - Scheduling constraints - Deployments and rolling updates - ConfigMaps and Secrets |
| Topic 3: Services & Networking | 20% | - Network policies - Ingress configuration - Services (ClusterIP, NodePort, LoadBalancer) |
| Topic 4: Cluster Architecture, Installation & Configuration | 25% | - Kubernetes architecture components - Cluster installation and configuration - High availability setup |
| Topic 5: Storage | 10% | - PersistentVolumes and PersistentVolumeClaims - Storage classes |
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NEW QUESTION # 40
You have a Deployment named 'wordpress-deployment' running a WordPress application with two pods. The WordPress application needs to access a shared secret key stored in a Secret named 'wordpress- secret'. How do you ensure the secret key is securely mounted and available to both pods?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Secret:
- Create a Secret named 'wordpress-secret' containing the shared secret key. Use 'kubectl create secret generic' with the '-from-literal' flag to create a generic Secret:
kubectl create secret generic wordpress-secret --from-literal=wordpress-secret="your secret_key"
2. Configure the Deployment:
- Modify the 'wordpress-deployment' Deployment to mount the 'wordpress-secref Secret as a volume in the Pod template. Use 'volumeMounts' to specify the mount path and 'volumes' to define the Secret as a volume source:
3. Apply the Changes: - Apply the modified Deployment YAML using 'kubectl apply -f wordpress-deployment.yaml'. 4. Verify the Secret Mount: - Use 'kubectl exec' to access a pod in the 'wordpress-deployment' and verify that the Secret is mounted at the specified path (e.g., 'Ivar/run/secrets/wordpress'). 5. Access the Secret Key: - Within the WordPress application's code, access the secret key from the mounted path.
NEW QUESTION # 41
Resume the rollout of the deployment
Answer:
Explanation:
kubectl rollout resume deploy webapp
NEW QUESTION # 42
You are running a Kubernetes cluster with a critical application that requires high availability and resilience. You have a Deployment named 'web-app' with multiple replicas. Your current DNS setup relies on external DNS providers, but you want to implement CoreDNS within your cluster to enhance DNS resolution performance and reliability. You need to configure CoreDNS to resolve DNS queries for services within the cluster and for external domains.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 Create a CoreDNS ConfigMap:
- Create a ConfigMap named coredns' containing the CoreDNS configuration. You can use a basic configuration file or a more complex one tailored to your specific needs.
2. Deploy CoreDNS: - Deploy CoreDNS as a Deployment using the 'coredns' ConfigMap.
3. Configure Services for DNS Resolution: - Create a Service named 'coredns' of type 'ClusterlP' that exposes the CoreDNS Deployment on the cluster network.
4. Update Cluster DNS Configuration: - Modify the 'kube-system namespace 'ConfigMap' named 'cluster-dns' to point to the 'coredns' Service for DNS resolution.
5. Verify CoreDNS Functionality: - Use 'kubectl exec -it -- sh -c "nslookup ..svc.cluster.local"' to test DNS resolution for services within the cluster. - Use "kubectl exec -it sh -c "nslookup example.com"' to test DNS resolution for external domains. - If everything is configured correctly, CoreDNS should successfully resolve DNS queries.
NEW QUESTION # 43
Score: 4%
Task
Check to see how many nodes are ready (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 # 44
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:
F:\Work\Data Entry Work\Data Entry\20200827\CKA\17 C.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\17 D.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\17 E.JPG
NEW QUESTION # 45
......
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