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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 30% | - Manage container stdout & stderr logs - Troubleshoot application failure - Troubleshoot networking - Evaluate cluster and node logging - Troubleshoot cluster component failure - Understand how to monitor applications |
| Cluster Architecture, Installation & Configuration | 25% | - Use Helm and Kustomize to install cluster components - Understand CRDs, install and configure operators - Manage role based access control (RBAC) - Create and manage Kubernetes clusters using kubeadm - Prepare underlying infrastructure for installing a Kubernetes cluster - Understand extension interfaces (CNI, CSI, CRI, etc.) - Manage the lifecycle of Kubernetes clusters - Implement and configure a highly-available control plane |
| Workloads & Scheduling | 15% | - Understand how scheduler works - Understand DaemonSets - Use label selectors to schedule Pods - Understand Deployments and rolling update/rollback - Understand resource limits and requests - Use ConfigMaps and Secrets to configure applications - Understand how to run multiple schedulers and configure scheduler policies - Understand Static Pods |
| Services & Networking | 20% | - Know how to use Ingress controllers and Ingress resources - Understand and use CoreDNS - Use ClusterIP, NodePort, LoadBalancer service types and endpoints - Use the Gateway API to manage Ingress traffic - Understand connectivity between Pods - Define and enforce Network Policies |
| Storage | 10% | - Understand how to configure applications with persistent storage - Understand Storage Classes and Persistent Volumes - Understand volume mode, access modes and reclaim policies - Understand persistent volume claims primitive |
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NEW QUESTION # 61
You are running an application in Kubernetes using a Deployment that defines 3 replicas. You need to perform a rolling update to the Deployment to upgrade the application to a new version. During the update process, you want to ensure that at least 2 replicas are always available, and the maximum number of new pods that can be created at the same time is also limited to 1. How can you configure the Deployment to achieve this rolling update strategy?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update Deployment YAML:
- Update the 'spec.replicas' field to the desired number of replicas for the new version.
- In the 'spec.strategy.rollingUpdate' section, set the 'maxUnavailable' to 1, meaning that only one pod can be unavailable during the update process.
- Set the maxSurge' to 1, limiting the number of new pods that can be created simultaneously to 1.
2. Apply the Updated Deployment: - Use 'kubectl apply -f deployment.yaml' to apply the changes to your cluster. 3. Monitor the Update Process: - Use 'kubectl get pods -l app=my-app' to monitor the pods. You will see a rolling update in progress: - One old pod will be terminated at a time. - One new pod will be created at a time. - The update will continue until all replicas are updated to the new version. 4. Verify the Update: - Once the update is complete, use 'kubectl describe deployment my-deployment' to check the deployment status. The 'updatedReplicas' field should match the 'replicas' field, indicating that the update was successful. By using 'maxUnavailable' and 'maxSurge' you control the number of unavailable and surge pods during the update process. This ensures a safe and controlled rolling update strategy.,
NEW QUESTION # 62
Check the history of the specific revision of that deployment
Answer:
Explanation:
kubectl rollout history deploy webapp --revision=3
NEW QUESTION # 63
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 # 64
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 # 65
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 # 66
......
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