Linux Foundation CKA Online Practice Questions and Exam Preparation

Linux Foundation CKA Online Questions & Answers

• Question 51:

  SIMULATION For this item, you will have to ssh to the nodes ik8s-master-0 and ik8s-node-0 and complete all tasks on these nodes. Ensure that you return to the base node (hostname: node-1) when you have completed this item. Context As an administrator of a small development team, you have been asked to set up a Kubernetes cluster to test the viability of a new application.

  Task

  You must use kubeadm to perform this task. Any kubeadm invocations will require the use of the -- ignore-preflight-errors=all option.

  Configure the node ik8s-master-O as a master node. .

  Join the node ik8s-node-o to the cluster.

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  You must use the kubeadm configuration file located at /etc/kubeadm.conf when initializing your cluster.

  You may use any CNI plugin to complete this task, but if you don't have your favourite CNI plugin's manifest URL at hand, Calico is one popular option:

  https://docs.projectcalico.org/v3.14/manifests/calico.yaml

  Docker is already installed on both nodes and apt has been configured so that you can install the required tools.

• Question 52:

  SIMULATION

  

  Task Create a new PersistentVolumeClaim

  1. Name: pv-volume

  2. Class: csi-hostpath-sc

  3. Capacity: 10Mi

  Create a new Pod which mounts the PersistentVolumeClaim as a volume:

  1. Name: web-server

  2. Image: nginx

  3. Mount path: /usr/share/nginx/html

  Configure the new Pod to have ReadWriteOnce access on the volume.

  Finally, using kubectl edit or kubectl patch expand the PersistentVolumeClaim to a capacity of 70Mi and record that change.

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  Solution:

  

  

  

• Question 53:

  SIMULATION

  

  Task

  Create a new nginx Ingress resource as follows:

  1. Name: ping

  2. Namespace: ing-internal

  3. Exposing service hi on path /hi using service port 5678

  

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  Solution:

  

• Question 54:

  SIMULATION List "nginx-dev" and "nginx-prod" pod and delete those pods

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  kubect1 get pods -o wide kubectl delete po "nginx-dev" kubectl delete po "nginx-prod"

• Question 55:

  SIMULATION

  Create a pod with environment variables as var1=value1.Check the environment variable in pod

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  kubectl run nginx --image=nginx --restart=Never --env=var1=value1 # then kubectl exec -it nginx -- env # or kubectl exec -it nginx -- sh -c 'echo $var1' # or kubectl describe po nginx | grep value1

• Question 56:

  SIMULATION

  Create a pod with image nginx called nginx and allow traffic on port 80

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  kubectl run nginx --image=nginx --restart=Never --port=80

• Question 57:

  SIMULATION

  

  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:

  1. does not allow access to Pods, which don't listen on port 9000

  2. does not allow access from Pods, which are not in namespace my-app

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  Solution:

  

  

• Question 58:

  SIMULATION

  

  From the pod label name=cpu-utilizer, find pods running high CPU workloads and write the name of the pod consuming most CPU to the file /opt/KUTR00102/KUTR00102.txt (which already exists).

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  Solution:

  

  

• Question 59:

  SIMULATION

  Scale the deployment webserver to 6 pods.

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  Solution:

  

• Question 60:

  SIMULATION

  List pod logs named "frontend" and search for the pattern "started" and write it to a file "/opt/error- logs"

  Correct Answer. Check the answer in explanation.
  Check the answer in explanation.

  ---

  Kubectl logs frontend | grep -i "started" > /opt/error-logs