UTILIZING RELIABLE CKA TEST DURATION - NO WORRY ABOUT CERTIFIED KUBERNETES ADMINISTRATOR (CKA) PROGRAM EXAM

Utilizing Reliable CKA Test Duration - No Worry About Certified Kubernetes Administrator (CKA) Program Exam

Utilizing Reliable CKA Test Duration - No Worry About Certified Kubernetes Administrator (CKA) Program Exam

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q109-Q114):

NEW QUESTION # 109
Scale the deployment from 5 replicas to 20 replicas and verify

Answer:

Explanation:
kubectl scale deploy webapp --replicas=20 kubectl get deploy webapp kubectl get po -l app=webapp


NEW QUESTION # 110
Your Kubernetes cluster is experiencing performance issues, and you suspect that the kubelet process is consuming excessive resources. You need to investigate the kubelet's resource usage and adjust its configuration to improve performance.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Monitor Kubelet Resource Usage:
- Use 'kubectl top node to view the resource usage of the kubelet process on each node:
- Look for signs of high CPU or memory usage by the kubelet process.
2. Examine Kubelet Logs:
- Check the kubelet logs for any errors or warnings related to resource constraints:
- The logs can be accessed using 'journalctl -u kubelet -n
- Search for messages that suggest the kubelet is struggling to manage resources.
3. Analyze Kubelet Configuration:
- Review the kubelet's configuration file:
- The configuration file is typically located at '/etc/kubernetes/kubelet/config' on the nodes.
- Check the following settings:
- '--max-pods': The maximum number of pods that the kubelet can manage.
- '--fail-swap-on': Determines if kubelet should fail nodes that have swap enabled.
- '--cgroup-root': Specifies the cgroup root used by kubelet.
- '--cadvisor-port': Specifies the port that the kubelet's cadvisor API listens on.
- '--event-burst': Specifies the maximum number of events that can be buffered before they are sent to the API server.
- '--event-qps': Specifies the maximum number of events that can be sent to the API server per second.
4. Adjust Kubelet Configuration:
- Based on the analysis of the kubelet logs and configuration, consider these adjustments:
- Increase resource limits for kubelet: Allocate more CPU and memory to the kubelet process if necessary.
- Reduce the '-max-pods' value: Limit the number of pods managed by the kubelet to reduce its resource consumption.
- Disable swap: If the kubelet is failing nodes due to swap, disable swap.
5. Restart Kubelet:
- After making configuration changes, restart the kubelet service on the affected nodes:
- For example, use 'systemctl restart kubelet' or 'sudo systemctl restart kubelet' on most Linux distributions.
6. Monitor Performance:
- Observe the cluster's performance after adjusting the kubelet configuration:
- Use tools like 'kubectl top node' or 'kubectl top pod' to monitor resource usage.
- Check for any improvements in the cluster's overall performance and stability.
7. Further Optimization:
- If the issue persists, you might need to:
- Upgrade the Kubernetes version: Older versions of Kubernetes might have known performance issues that are addressed in newer versions.
- Analyze node hardware: Ensure that the nodes have sufficient resources to handle the workload.
- Consider using a different Kubernetes distribution: Different distributions of Kubernetes might have different performance characteristics.
- Enable Vertical Pod Autoscaling (VPA): VPA can automatically adjust the resource requests and limits of pods based on their resource usage, which can improve resource utilization.


NEW QUESTION # 111
You have a Kubernetes cluster with a 'default' namespace. You want to prevent any users from creating pods in this namespace.
Create a ClusterRole and ClusterRoleBinding to achieve this restriction.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
Step 1: Create a ClusterRole to deny pod creation in the 'default' namespace.

Step 2: Create a ClusterRoleBinding to apply the ClusterRole to all users.

We create a ClusterRole that specifically targets the 'default' namespace and denies 'create' permissions for pods. This ClusterRole uses 'resourceNames' and 'namespaceSelector& to precisely target the 'default' namespace. We create a ClusterRoleBinding that applies the ClusterRole to all users in the cluster. Applying the configurations: Use 'kubectl apply -f [filename].yaml' to apply the ClusterRole and ClusterRoleBinding YAML files. This will prevent anyone from creating pods in the 'default' namespace. This configuration is a powerful way to implement security policies and prevent unintended resource creation in sensitive namespaces. ,


NEW QUESTION # 112
From the pod labelname=cpu-utilizer, find podsrunning high CPU workloads and write the name of the pod consumingmost CPU to thefile/opt/KUTR00102/KUTR00102.txt(which already exists).

Answer:

Explanation:
See the solution below.
Explanation
solution


NEW QUESTION # 113
Evict all existing pods from a node-1 and make the node unschedulable for new pods.

  • A. kubectl get nodes
    kubectl drain node-1 #It will evict pods running on node-1 to
    other nodes in the cluster
    // Verify
    kubectl get no
    When you cordon a node, the status shows "SchedulingDisabled"
  • B. kubectl get nodes
    kubectl drain node-1 #It will evict pods running on node-1 to
    other nodes in the cluster
    kubectl cordon node-1 # New pods cannot be scheduled to the
    node
    // Verify
    kubectl get no
    When you cordon a node, the status shows "SchedulingDisabled"

Answer: B


NEW QUESTION # 114
......

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