Linux Foundation Kubernetes Administrator CKA Questions & Answers

• Question 11:

  SIMULATION

  Create a file:

  /opt/KUCC00302/kucc00302.txt that lists all pods that implement service baz in namespace development.

  The format of the file should be one pod name per line.

  Correct Answer: Check the answer in explanation.

  

  

  

• Question 12:

  SIMULATION

  Create a Kubernetes secret as follows:

  Name: super-secret

  password: bob

  Create a pod named pod-secrets-via-file, using the redis Image, which mounts a secret named super- secret at /secrets.

  Create a second pod named pod-secrets-via-env, using the redis Image, which exports password as CONFIDENTIAL

  Correct Answer: Check the answer in explanation.

  Solution

  

  

  

• Question 13:

  SIMULATION

  Create a pod as follows: Name: non-persistent-redis container Image: redis Volume with name: cache-control Mount path: /data/redis The pod should launch in the staging namespace and the volume must not be persistent.

  Correct Answer: Check the answer in explanation.

  

  

  

• Question 14:

  SIMULATION

  Scale the deployment webserver to 6 pods.

  Correct Answer: Check the answer in explanation.

  Solution

  

• Question 15:

  SIMULATION

  Check to see how many worker nodes are ready (not including nodes tainted NoSchedule) and write the number to /opt/KUCC00104/kucc00104.txt.

  Correct Answer: Check the answer in explanation.

  

  

• Question 16:

  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.

  

  

• Question 17:

  SIMULATION Create a deployment as follows: Name: nginx-random Exposed via a service nginx-random Ensure that the serviceand; pod are accessible via their respective DNS records The container(s) within any pod(s) running as a part of this deployment should use the nginx Image Next, use the utility nslookup to look up the DNS records of the service and pod and write the output to /opt/KUNW00601/service.dns and /opt/ KUNW00601/pod.dns respectively.

  Correct Answer: Check the answer in explanation.

  Solution:

  

• Question 18:

  SIMULATION

  

  Create a snapshot of the etcd instance running at https://127.0.0.1:2379, saving the snapshot to the file path /srv/data/etcd-snapshot.db. The following TLS certificates/key are supplied for connecting to the server with etcdctl:

  1.

  CA certificate: /opt/KUCM00302/ca.crt

  2.

  Client certificate: /opt/KUCM00302/etcd-client.crt

  3.

  Client key: Topt/KUCM00302/etcd-client.key

  Correct Answer: Check the answer in explanation.

  Solution

  

• Question 19:

  SIMULATION

  

  Set the node named ek8s-node-1 as unavailable and reschedule all the pods running on it.

  Correct Answer: Check the answer in explanation.

  Solution

  

• Question 20:

  SIMULATION

  A Kubernetes worker node, named wk8s-node-0 is in state NotReady. Investigate why this is the case, and perform any appropriate steps to bring the node to a Ready state, ensuring that any changes are made permanent.

  

  You can ssh to the failed node using:

  [student@node-1] $ | ssh Wk8s-node-0

  You can assume elevated privileges on the node with the following command:

  [student@w8ks-node-0] $ | sudo -i

  Correct Answer: Check the answer in explanation.