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| Section | Weight | Objectives |
|---|---|---|
| Cluster Architecture, Installation & Configuration | 25% | - Install components via Helm / Kustomize - Understand CNI, CSI, CRI interfaces - Manage RBAC - Implement high availability control plane - Prepare infrastructure for cluster installation - Work with CRDs and Operators - Create and manage clusters with kubeadm - Manage cluster lifecycle and upgrades |
| Services & Networking | 20% | - Network policies - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - Ingress resources and controllers - CoreDNS and service discovery - CNI configuration and troubleshooting |
| Storage | 10% | - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - StorageClasses and dynamic provisioning - StatefulSet storage configuration - Volume types and access modes |
| Troubleshooting | 30% | - Network connectivity and DNS resolution problems - Worker node issues and recovery - Pod and application failures - Log collection and analysis - Control plane component failures - Cluster component health checks |
| Workloads & Scheduling | 15% | - Pod lifecycle, init containers, probes - Pod scheduling: node selector, affinity, taints/tolerations - Deployments, rolling updates and rollbacks - Resource requests, limits and autoscaling - Configure applications with ConfigMaps and Secrets |
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75. Frage
Create a deployment as follows:
* Name:nginx-app
* Using containernginxwithversion 1.11.10-alpine
* The deployment should contain3replicas
Next, deploy the application with newversion1.11.13-alpine, byperforming a rolling update.
Finally, rollback that update to theprevious version1.11.10-alpine.
Antwort:
Begründung:
See the solution below.
Explanation
solution
76. Frage
You are deploying a new microservice to your Kubernetes cluster. This service needs to communicate with another service within the same cluster. You want to ensure that the communication between the two services is secure and reliable. Which container network interface plugin would you choose for this scenario and why?
Antwort:
Begründung:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Choose the appropriate Container Network Interface Plugin:
- For secure and reliable communication between services within the same Kubernetes cluster, the Calico container network interface plugin is a recommended choice.
2. Reasons for choosing Calico:
- Security: Calico provides robust network security features like network policies that allow you to define fine- grained access control rules between pods and services. This ensures secure communication only between authorized entities.
- Reliability: Calico offers high availability and reliability. It uses a distributed architecture and supports BGP for efficient routing and load balancing, leading to resilient network connectivity.
- Ease of Use: Calico integrates seamlessly with Kubernetes and is easy to configure and manage.
- Scalability: It's highly scalable, enabling you to manage large and complex Kubernetes environments.
3. Example Implementation:
- Install Calico: Use the 'kubectl' command to install Calico on your Kubernetes cluster:
kubectl apply -f https://docs.projectcalico.org/v3.19/getting-
started/kubernetes/installation/l .8+/manifests/calico.yaml
- Define Network Policies: Create network policies to control communication between your services. Here's an example:
This policy allows pods labeled 'app: microservice? to communicate with pods labeled 'app: microservice? within the 'default' namespace. 4. Verify the Configuration: - Use 'kubectl get networkpolicies' to list the defined network policies. - Test communication between your services. Note: Calico is a popular and highly regarded choice for Kubernetes networking. However, other plugins like Flannel and Weave are also viable options, depending on your specific requirements and preferences. ,
77. Frage
Create and configure the service front-end-service so it's accessible through NodePort and routes to the existing pod named front-end.
Antwort:
Begründung:
solution
78. Frage
Score: 7%
Task
Create a new NetworkPolicy named allow-port-from-namespace in the existing namespace echo. Ensure that the new NetworkPolicy allows Pods in namespace my-app to connect to port 9000 of Pods in namespace echo.
Further ensure that the new NetworkPolicy:
* does not allow access to Pods, which don't listen on port 9000
* does not allow access from Pods, which are not in namespace my-app
Antwort:
Begründung:
Solution:
#network.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: allow-port-from-namespace
namespace: internal
spec:
podSelector:
matchLabels: {
}
policyTypes:
- Ingress
ingress:
- from:
- podSelector: {
}
ports:
- protocol: TCP
port: 8080
#spec.podSelector namespace pod
kubectl create -f network.yaml
79. Frage
Create a namespace called 'development' and a pod with image nginx called nginx on this namespace.
Antwort:
Begründung:
See the solution below.
Explanation
kubectl create namespace development
kubectl run nginx --image=nginx --restart=Never -n development
80. Frage
......
Was wissen Sie über die Linux Foundation CKA Zertifizierungsprüfungen? Als eine sehr populäre Linux Foundation Zertifizierungsprüfung ist diese Prüfung sehr wichtig. Aber wenn Sie für die bessere Vorbereitung der Linux Foundation CKA Prüfungen die Schulungsunterlagen finden, ist es nicht leicht für Sie eine sehr ausgezeichnetes Nachschlagebuch finden. Und Was können Sie machen? Es macht nichts. Wir Pass4Test Ihre Wünsche kennen und Ihre Bedürfnisse erfüllen bei Angeboten der besten Prüfungsfragen und Antworten zur Linux Foundation CKA Zertifizierung.
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