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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Architecture, Installation & Configuration | 25% | - Manage cluster lifecycle and upgrades - Create and manage clusters with kubeadm - Prepare infrastructure for cluster installation - Implement high availability control plane - Manage RBAC - Install components via Helm / Kustomize - Understand CNI, CSI, CRI interfaces - Work with CRDs and Operators |
| Topic 2: Troubleshooting | 30% | - Worker node issues and recovery - Pod and application failures - Log collection and analysis - Control plane component failures - Network connectivity and DNS resolution problems - Cluster component health checks |
| Topic 3: Storage | 10% | - StorageClasses and dynamic provisioning - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - StatefulSet storage configuration - Volume types and access modes |
| Topic 4: Workloads & Scheduling | 15% | - Configure applications with ConfigMaps and Secrets - Pod lifecycle, init containers, probes - Resource requests, limits and autoscaling - Pod scheduling: node selector, affinity, taints/tolerations - Deployments, rolling updates and rollbacks |
| Topic 5: Services & Networking | 20% | - Network policies - CoreDNS and service discovery - Ingress resources and controllers - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - CNI configuration and troubleshooting |
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NEW QUESTION # 76
Score: 4%
Task
Create a pod named kucc8 with a single app container for each of the following images running inside (there may be between 1 and 4 images specified): nginx + redis + memcached .
Answer:
Explanation:
Solution:
kubectl run kucc8 --image=nginx --dry-run -o yaml > kucc8.yaml
# vi kucc8.yaml
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
name: kucc8
spec:
containers:
- image: nginx
name: nginx
- image: redis
name: redis
- image: memcached
name: memcached
- image: consul
name: consul
#
kubectl create -f kucc8.yaml
#12.07
NEW QUESTION # 77
You have an application deployed in your Kubernetes cluster that is configured to access a private database hosted on another Kubernetes cluster in a different VPC. How would you configure a secure and efficient way for your application to communicate with the private database?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Create a Service Account in the Database Cluster:
- Create a Service Account in the database cluster that will be used by the application in the other cluster.
- Example:
- Apply this configuration using 'kubectl apply -f service-account.yaml' in the database cluster. 2. Generate a Secret for the Service Account: - Generate a secret for the Service Account. This secret will contain the credentials needed to access the database. - Example: bash kubectl create secret generic database-client-secret --from-literal=username= -n - Replace and with your actual credentials and " with the namespace where your database service is running. 3. Configure a Network Policy: - Create a Network Policy in the database cluster to allow traffic from your application's pods in the other cluster. - Example:
- Replace with the label assigned to your application pods. 4. Create a Service in the Database Cluster: - Create a Service in the database cluster that exposes your database. This service will be used by your application to connect to the database. - Example:
- Replace 'database' with the label of your database pods. 6. Configure the Application Deployment: - In your application's deployment configuration, mount the secret containing the database credentials and configure your application to connect to the database service in the other cluster using the service's DNS name. - Example:
- Ensure that the application has the necessary network connectivity to access the database cluster through your network configuration. - Example: - Configure a VPC peering connection between the two VPCs to enable direct communication between the clusters. - Create a VPN connection between the clusters using a VPN gateway. 7. Test the Connection: - Verify that your application can successfully connect to and interact with the database.
NEW QUESTION # 78
Create a pod with environment variables as var1=value1.Check the environment variable in pod
Answer:
Explanation:
kubectl run nginx --image=nginx --restart=Never --env=var1=value1
# then
kubectl exec -it nginx -- env
# or
kubectl exec -it nginx -- sh -c 'echo $var1'
# or
kubectl describe po nginx | grep value1
NEW QUESTION # 79
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:
See the solution below.
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
# taintsnoSchedule
kubectl describe nodes | grep -i taints | grep -i noschedule |wc -l
#
echo 2 > /opt/KUSC00402/kusc00402.txt
NEW QUESTION # 80
You have a Deployment with 5 replicas. You want to increase the number of replicas to 10, but only after ensuring that the new pods are healthy and ready to serve traffic.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML:
- Update the 'replicas' field in the Deployment YAML to 10.
2. Apply the Changes: - Apply the updated YAML file using 'kubectl apply -f my-deployment.yaml' 3. Monitor Pod Status: - Use 'kubectl get pods -l app=my-app' to monitor the status of the pods. - Ensure that the new pods are in the "Running' state and have a 'Ready' status. 4. Check Liveness and Readiness Probes: - If applicable, ensure that liveness and readiness probes are configured to check the health of the pods. - This helps in identifying and restarting unhealthy pods. 5. Verify Service Availability: - Use 'kubectl get services my-service" to check the service status. - Ensure that the service is still available and serving traffic. 6. Increase Replicas: - Once the new pods are healthy and ready, the deployment will automatically scale up to 10 replicas.
NEW QUESTION # 81
......
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