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Die Zertifizierungsantworten zur Linux Foundation CKA Zertifizierungsprüfung von ExamFragen sind die Grundbedarfsgüter der Kandidaten, mit deren Sie sich ausreichend auf die Linux Foundation CKA Prüfung vorbereiten und selbstsicherer die Prüfung machen können. Sie sind seht zielgerichtet und von guter Qualität. Nur ExamFragen könnte so perfekt sein.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Services & Networking | 20% | - Ingress resources and controllers - CNI configuration and troubleshooting - CoreDNS and service discovery - Network policies - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName |
| Topic 2: Cluster Architecture, Installation & Configuration | 25% | - Understand CNI, CSI, CRI interfaces - Create and manage clusters with kubeadm - Implement high availability control plane - Prepare infrastructure for cluster installation - Manage cluster lifecycle and upgrades - Manage RBAC - Work with CRDs and Operators - Install components via Helm / Kustomize |
| Topic 3: Storage | 10% | - StorageClasses and dynamic provisioning - StatefulSet storage configuration - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - Volume types and access modes |
| Topic 4: Troubleshooting | 30% | - Pod and application failures - Cluster component health checks - Network connectivity and DNS resolution problems - Control plane component failures - Log collection and analysis - Worker node issues and recovery |
| Topic 5: Workloads & Scheduling | 15% | - Pod scheduling: node selector, affinity, taints/tolerations - Configure applications with ConfigMaps and Secrets - Deployments, rolling updates and rollbacks - Pod lifecycle, init containers, probes - Resource requests, limits and autoscaling |
Die Senior Experten haben die online Prüfungsfragen zur Linux Foundation CKA Zertifizierungsprüfung nach ihren Kenntnissen und Erfahrungen bearbeitet, deren Ähnlichkeit mit den realen Prüfungen 95% beträgt. Ich habe Vertrauen in unsere Produkte. Wenn Sie die Produkte von ExamFragen kaufen, wird ExamFragen Ihnen helfen, die Linux Foundation CKA Zertifizierungsprüfung einmalig zu bestehen. Sonst erstatteten wir Ihnen gesammte Einkaufgebühren.
73. Frage
Create a pod as follows:
Name: mongo
Using Image: mongo
In a new Kubernetes namespace named: my-website
Antwort:
Begründung:
solution
74. Frage
You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000056
Task
Review and apply the appropriate NetworkPolicy from the provided YAML samples.
Ensure that the chosen NetworkPolicy is not overly permissive, but allows communication between the frontend and backend Deployments, which run in the frontend and backend namespaces respectively.
First, analyze the frontend and backend Deployments to determine the specific requirements for the NetworkPolicy that needs to be applied.
Next, examine the NetworkPolicy YAML samples located in the ~/netpol folder.
Failure to comply may result in a reduced score.
Do not delete or modify the provided samples. Only apply one of them.
Finally, apply the NetworkPolicy that enables communication between the frontend and backend Deployments, without being overly permissive.
Antwort:
Begründung:
Task Summary
* Connect to host cka000056
* Review existing frontend and backend Deployments
* Choose one correct NetworkPolicy from the ~/netpol directory
* The policy must:
* Allow traffic only from the frontend Deployment to the backend Deployment
* Avoid being overly permissive
* Apply the correct NetworkPolicy without modifying any sample files
Step-by-Step Instructions
Step 1: SSH into the correct node
ssh cka000056
Step 2: Inspect the frontend Deployment
Check the labels used in the frontend Deployment:
kubectl get deployment -n frontend -o yaml
Look under metadata.labels or spec.template.metadata.labels. Note the app or similar label (e.g., app:
frontend).
Step 3: Inspect the backend Deployment
kubectl get deployment -n backend -o yaml
Again, find the labels assigned to the pods (e.g., app: backend).
Step 4: List and review the provided NetworkPolicies
List the available files:
ls ~/netpol
Check the contents of each policy file:
cat ~/netpol/<file-name>.yaml
Look for a policy that:
* Has kind: NetworkPolicy
* Applies to the backend namespace
* Uses a podSelector that matches the backend pods
* Includes an ingress.from rule that references the frontend namespace using a namespaceSelector (and optionally a podSelector)
* Does not allow traffic from all namespaces or all pods
Here's what to look for in a good match:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: allow-frontend-to-backend
namespace: backend
spec:
podSelector:
matchLabels:
app: backend
ingress:
- from:
- namespaceSelector:
matchLabels:
name: frontend
Even better if the policy includes:
- namespaceSelector:
matchLabels:
name: frontend
podSelector:
matchLabels:
app: frontend
This limits access to pods in the frontend namespace with a specific label.
Step 5: Apply the correct NetworkPolicy
Once you've identified the best match, apply it:
kubectl apply -f ~/netpol/<chosen-file>.yaml
Apply only one file. Do not alter or delete any existing sample.
ssh cka000056
kubectl get deployment -n frontend -o yaml
kubectl get deployment -n backend -o yaml
ls ~/netpol
cat ~/netpol/*.yaml # Review carefully
kubectl apply -f ~/netpol/<chosen-file>.yaml
Command Summary
ssh cka000056
kubectl get deployment -n frontend -o yaml
kubectl get deployment -n backend -o yaml
ls ~/netpol
cat ~/netpol/*.yaml # Review carefully
kubectl apply -f ~/netpol/<chosen-file>.yaml
75. Frage
Given a partially-functioning Kubernetes cluster, identify symptoms of failure on the cluster.
Determine the node, the failing service, and take actions to bring up the failed service and restore the health of the cluster. Ensure that any changes are made permanently.
You can ssh to the relevant I nodes (
[student@node-1] $ ssh <nodename
You can assume elevated privileges on any node in the cluster with the following command:
[student@nodename] $ | sudo -i
Antwort:
Begründung:
See the solution below.
Explanation
solution
F:\Work\Data Entry Work\Data Entry\20200827\CKA\23 C.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\23 D.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\23 E.JPG
76. Frage
Create a pod named kucc8 with a single app container for each of the
following images running inside (there may be between 1 and 4 images specified):
nginx + redis + memcached.
Antwort:
Begründung:
77. Frage
Get the DNS records for the service and pods for the deployment redis and the put the value in /tmp/dnsrecordpod and /tmp/dnsrecord-service
Antwort: A
78. Frage
......
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P.S. Kostenlose und neue CKA Prüfungsfragen sind auf Google Drive freigegeben von ExamFragen verfügbar: https://drive.google.com/open?id=1ZW9JBycCB0iEm-d6-jpH8C46VINfIt7x