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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Workloads & Scheduling | 15% | - Use ConfigMaps and Secrets to configure applications - Understand Static Pods - Understand Deployments and rolling update/rollback - Use label selectors to schedule Pods - Understand how to run multiple schedulers and configure scheduler policies - Understand DaemonSets - Understand resource limits and requests - Understand how scheduler works |
| Topic 2: Services & Networking | 20% | - Understand and use CoreDNS - Use the Gateway API to manage Ingress traffic - Understand connectivity between Pods - Define and enforce Network Policies - Use ClusterIP, NodePort, LoadBalancer service types and endpoints - Know how to use Ingress controllers and Ingress resources |
| Topic 3: Troubleshooting | 30% | - Troubleshoot cluster component failure - Evaluate cluster and node logging - Troubleshoot networking - Manage container stdout & stderr logs - Troubleshoot application failure - Understand how to monitor applications |
| Topic 4: Storage | 10% | - Understand how to configure applications with persistent storage - Understand Storage Classes and Persistent Volumes - Understand persistent volume claims primitive - Understand volume mode, access modes and reclaim policies |
| Topic 5: Cluster Architecture, Installation & Configuration | 25% | - Understand CRDs, install and configure operators - Create and manage Kubernetes clusters using kubeadm - Manage the lifecycle of Kubernetes clusters - Use Helm and Kustomize to install cluster components - Implement and configure a highly-available control plane - Understand extension interfaces (CNI, CSI, CRI, etc.) - Manage role based access control (RBAC) - Prepare underlying infrastructure for installing a Kubernetes cluster |
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NEW QUESTION # 46
Check to see how many worker nodes are ready (not including nodes tainted NoSchedule) and write the number to /opt/KUCC00104/kucc00104.txt.
Answer:
Explanation:
solution
NEW QUESTION # 47
You have a Deployment named 'frontend-deployment' with 5 replicas of a frontend container. You need to implement a rolling update strategy that allows for a maximum of 2 pods to be unavailable at any given time. You also want to ensure that the update process is completed within a specified timeout of 8 minutes. If the update fails to complete within the timeout, the deployment should revert to the previous version. Additionally, you want to configure a 'post-start' hook for the frontend container that executes a health check script to verify the application's readiness before it starts accepting 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' to 5.
- Define 'maxUnavailable: 2' and 'maxSurge: 0' in the 'strategy.rollingUpdate' section to control the rolling update process.
- Configure a 'strategy.type' to 'RollingUpdate' to trigger a rolling update when the deployment is updated.
- Set Always' to ensure that the new image is pulled even if
it exists in the pod's local cache.
- Add a 'spec.progressDeadlineSeconds: 480' to set a timeout of 8 minutes for the update process.
- Add a 'spec.template.spec.containers[0].lifecycle.postStart' hook to define a script that executes a health check script before the container starts accepting traffic.
2. Create the Deployment: - Apply the updated YAML file using 'kubectl apply -f frontend-deployment.yaml' 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments frontend-deployment' to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to the 'my.org/frontend:latest' Docker Hub repository. 5. Monitor the Deployment: - Use 'kubectl get pods -l app=frontend' to monitor the pod updates during the rolling update process. 6. Observe Rollback if Timeout Exceeds: - If the update process takes longer than 8 minutes to complete, the deployment will be rolled back to the previous version. This can be observed using 'kubectl describe deployment frontend-deployment' and checking the 'updatedReplicas' and 'availableReplicas' fields.,
NEW QUESTION # 48
You have a two-tier application with a frontend service 'frontend-svc' exposing a Node.js application running in pods labeled 'app: frontend', and a backend service 'backend-svc' exposing a Python application running in pods labeled 'app: backend'. The frontend pods need to communicate with the backend pods through a service. Design a Kubernetes network setup that allows the frontend pods to access the backend service, ensuring that the backend service is reachable only by the frontend service and not directly from outside the cluster.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Service for the Backend:
- Define a Service for the backend pods:
- This Service creates a ClusterlP service, accessible only within the cluster. The 'targetPort' specifies the port exposed by the backend pods. 2. Create a Service for the Frontend: - Define a Service for the frontend pods:
- This Service creates a LoadBalancer service, accessible from outside the cluster. 3. Configure NetworkPolicy for the Frontend Service: - Define a NetworkPolicy that allows traffic from the 'frontend-svc' to the 'backend-svc':
- This NetworkPolicy allows ingress traffic from the 'frontend-svc' and egress traffic to the 'backend-svc'. 4. Apply the Configurations: - Apply the YAML files using 'kubectl apply -f backend-svc.yaml' , 'kubectl apply -f frontend-svc.yamr , and kubectl apply -f frontend-to-backend.yamr. 5. Verification: - Check the status of the services: 'kubectl get services' - Check the network policy status: 'kubectl get networkpolicies' Now, the frontend pods can communicate with the backend service through the 'backend-svc' service. External clients can access the frontend application through the 'frontend-svc' service. The backend service is not accessible directly from outside the cluster due to the NetworkPolicy restricting traffic from external sources. ]
NEW QUESTION # 49
Create a ETCD backup of kubernetes cluster
Note : You don't need to memorize command, refer -
https://kubernetes.io/docs/tasks/administer-cluster/configureupgrade-etcd/ during exam
Answer: A
NEW QUESTION # 50
Undo the deployment with the previous version and verify
everything is Ok
Answer:
Explanation:
kubectl rollout undo deploy webapp kubectl rollout status deploy webapp kubectl get pods
NEW QUESTION # 51
......
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