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IT業の多くの人がいくつか認証試験にパスしたくて、それなりの合格証明書が君に最大な上昇空間を与えます。この競争の激しい業界でとんとん拍子に出世させるのはLinux FoundationのCKA認定試験ですが、簡単にパスではありません。でもたくさんの方法があって、最も少ない時間をエネルギーをかかるのは最高です。
| Section | Weight | Objectives |
|---|---|---|
| Workloads & Scheduling | 15% | - Understand DaemonSets - Understand Static Pods - Understand how to run multiple schedulers and configure scheduler policies - Understand Deployments and rolling update/rollback - Understand resource limits and requests - Use ConfigMaps and Secrets to configure applications - Use label selectors to schedule Pods - Understand how scheduler works |
| Cluster Architecture, Installation & Configuration | 25% | - Create and manage Kubernetes clusters using kubeadm - Understand extension interfaces (CNI, CSI, CRI, etc.) - Understand CRDs, install and configure operators - Manage the lifecycle of Kubernetes clusters - Prepare underlying infrastructure for installing a Kubernetes cluster - Manage role based access control (RBAC) - Implement and configure a highly-available control plane - Use Helm and Kustomize to install cluster components |
| Troubleshooting | 30% | - Understand how to monitor applications - Evaluate cluster and node logging - Manage container stdout & stderr logs - Troubleshoot application failure - Troubleshoot networking - Troubleshoot cluster component failure |
| Storage | 10% | - Understand Storage Classes and Persistent Volumes - Understand persistent volume claims primitive - Understand volume mode, access modes and reclaim policies - Understand how to configure applications with persistent storage |
| Services & Networking | 20% | - Use the Gateway API to manage Ingress traffic - Know how to use Ingress controllers and Ingress resources - Understand and use CoreDNS - Define and enforce Network Policies - Use ClusterIP, NodePort, LoadBalancer service types and endpoints - Understand connectivity between Pods |
>> Linux Foundation CKA関連復習問題集 <<
ご存じのように、私たちのCKA学習教材を利用するユーザーが多いです。CKA学習教材の質問が表示されない場合は、私たちとご連絡頂きます。私たちのスタッフは毎日多くのことを対処しなければなりませんが、どのユーザーも無視することはありません。 私たちのCKA学習教材の市場はますます大きくなりました。そして、顧客のサポートがあると、私たちのCKA学習教材がより良くなると信じています。
質問 # 25
You have a Kubernetes cluster with multiple namespaces. You need to create a shared network policy that allows pods in a specific namespace ('dev') to communicate with pods in another namespace ('prod'), but only for specific ports. How would you configure this shared network policy?
正解：
解説：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Network Policy in the 'prod' Namespace:
- Define a Network Policy in the 'prod' namespace that allows ingress traffic from pods in the 'dev' namespace.
- Example:
- This Network Policy will allow TCP traffic from pods in the 'dev' namespace to the 'prod' namespace on ports 8080 and 5432. 2. Apply the Network Policy: - Apply the Network Policy using 'kubectl apply -f network-policy.yaml'. 3. Verify the Policy: - You can use 'kubectl get networkpolicies -n prod' to verify that the Network Policy is created successfully. - Test communication between pods in the 'dev' and prod' namespaces using the specified ports. 4. Additional Considerations: - You can adjust the 'podSelector' and 'namespaceSelector' fields to target specific pods or namespaces. - You can use the 'ingress' and 'egress' fields to configure both ingress and egress traffic rules. - Ensure that your application's deployments have the necessary labels for the Network Policy to apply correctly. ,
質問 # 26
Score: 7%
Task
Given an existing Kubernetes cluster running version 1.20.0, upgrade all of the Kubernetes control plane and node components on the master node only to version 1.20.1.
Be sure to drain the master node before upgrading it and uncordon it after the upgrade.
You are also expected to upgrade kubelet and kubectl on the master node.
正解：
解説：
SOLUTION:
[student@node-1] > ssh ek8s
kubectl cordon k8s-master
kubectl drain k8s-master --delete-local-data --ignore-daemonsets --force apt-get install kubeadm=1.20.1-00 kubelet=1.20.1-00 kubectl=1.20.1-00 --disableexcludes=kubernetes kubeadm upgrade apply 1.20.1 --etcd-upgrade=false systemctl daemon-reload systemctl restart kubelet kubectl uncordon k8s-master
質問 # 27
You need to set up a load balancer for your Nginx service with the following requirements:
- Session affinity: Preserve client sessions across multiple pods, even if the pod is restarted or rescheduled.
- Health checks: Regularly check the health of Nginx pods and automatically remove unhealthy pods from the load balancer pool.
- Custom header: Add a custom header with the name "X-App-Version" and value "vl .0" to all requests to your Nginx service. How would you configure your Kubernetes resources to meet these requirements?
正解：
解説：
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the Service:
- Create a Service of type "LoadBalancer" for your Nginx service.
- Include the sessionAffinity' field with a value of 'ClientlP' to enable client IP-based session affinity.
- Example:
2. Configure the Deployment: - In your Nginx Deployment, define a liveness probe and readiness probe to check the health of your Nginx containers. - Example:
3. Implement the Custom Header: - Configure an Ingress resource with the nginx.ingress.kubernetes.io/add-request-headeo annotation. - Example:
4. Apply the Configurations: - Apply the updated Service, Deployment, and Ingress resources using 'kubectl apply -f service.yaml -f deployment.yaml -f ingress.yamr. 5. Verify the Load Balancer: - Access the Nginx service using the external IP address provided by the LoadBalancer. - Verify session affinity by making multiple requests and observing that they are consistently routed to the same pod. - Check the "X-App-Version" header in the responses to confirm that it is set to "vl .0".
質問 # 28
List pod logs named "frontend" and search for the pattern "started" and write it to a file "/opt/error-logs"
正解：
解説：
Kubectl logs frontend | grep -i "started" > /opt/error-logs
質問 # 29
Check the image version in pod without the describe command
正解：
解説：
kubectl get po nginx -o
jsonpath='{.spec.containers[].image}{"\n"}'
質問 # 30
......
インタネット時代に当たるなので、パソコン上のLinux FoundationのCKA試験についての情報は複雑で区別するのは困難なことであると思われます。それで、我々Tech4Examの高質で完備なCKA問題集を勧めて、あなたの資料を選んでかかる時間のロースを減少し、もっと多くの時間を利用してCKA問題集を勉強します。
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