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| Section | Weight | Objectives |
|---|---|---|
| Storage | 10% | - StorageClasses and dynamic provisioning - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - StatefulSet storage configuration - Volume types and access modes |
| Cluster Architecture, Installation & Configuration | 25% | - Implement high availability control plane - Understand CNI, CSI, CRI interfaces - Manage RBAC - Prepare infrastructure for cluster installation - Install components via Helm / Kustomize - Work with CRDs and Operators - Manage cluster lifecycle and upgrades - Create and manage clusters with kubeadm |
| Troubleshooting | 30% | - Network connectivity and DNS resolution problems - Pod and application failures - Worker node issues and recovery - Log collection and analysis - Cluster component health checks - Control plane component failures |
| Workloads & Scheduling | 15% | - Configure applications with ConfigMaps and Secrets - Pod scheduling: node selector, affinity, taints/tolerations - Pod lifecycle, init containers, probes - Deployments, rolling updates and rollbacks - Resource requests, limits and autoscaling |
| Services & Networking | 20% | - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - Ingress resources and controllers - Network policies - CNI configuration and troubleshooting - CoreDNS and service discovery |
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NEW QUESTION # 75
Task Weight: 4%
Task
Schedule a Pod as follows:
* Name: kucc1
* App Containers: 2
* Container Name/Images:
o nginx
o consul
Answer:
Explanation:
Solution:
Graphical user interface, text, application Description automatically generated
Text Description automatically generated
NEW QUESTION # 76
Score: 13%
Task
A Kubernetes worker node, named wk8s-node-0 is in state NotReady. Investigate why this is the case, and perform any appropriate steps to bring the node to a Ready state, ensuring that any changes are made permanent.
Answer:
Explanation:
Solution:
sudo -i
systemctl status kubelet
systemctl start kubelet
systemctl enable kubelet
NEW QUESTION # 77
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 # 78
Get IP address of the pod - "nginx-dev"
Answer:
Explanation:
Kubect1 get po -o wide
Using JsonPath
kubect1 get pods -o=jsonpath='{range
.items[*]}{.metadata.name}{"\t"}{.status.podIP}{"\n"}{end}'
NEW QUESTION # 79
You are running a stateful application on Kubernetes with a Deployment that manages five pods. Each pod has a persistent volume claim (PVC) that mounts a volume to store application dat a. You need to ensure that the pods are always deployed in the same order and that data is consistently accessed from the same PVC. How can you achieve this using Kubernetes features?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Enable StatefulSet: Create a StatefulSet instead of a Deployment. StatefulSets are specifically designed to manage stateful applications.
2. Use the 'podManagementPolicy' Field: Set the 'podManagementPolicy' field to 'OrderedReady' in the spec' section of your StatefulSet to ensure that pods are deployed in the same order and become ready before new pods are deployed. This policy guarantees that the previous pod is ready before the next one is started.
3. Utilize Persistent Volumes: Ensure that your PVCs are bound to persistent volumes (PVs). PVs are the underlying storage resources that back your PVCs. They are usually provisioned using a storage class.
4. Set 'serviceName': The 'serviceName' field should be specified in the StatefulSet to create a service for accessing the application. This service allows you to access the application based on its name, regardless of which pod is currently serving the requests.
5. Verify Deployment: After applying the YAML, check the status of your StatefulSet using 'kubectl get statefulset my-stateful-app'. Ensure that the pods are deployed in the specified order and are running. You can also verify the PVCs using 'kubectl get pvc' to make sure they are bound to the correct PVs.
NEW QUESTION # 80
......
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