Free Practice Questions for Linux Foundation CKA Exam

Get list of all the pods showing name and namespace with a jsonpath expression.

• A . Explanation:
  kubectl get pods -o=jsonpath='{.items[*]['metadata.name'
  , 'metadata.namespace']}'
  

Get IP address of the pod -- ''nginx-dev''

• A . Explanation:
  Kubect1 get po -o wide
  Using JsonPath
  kubect1 get pods -o=jsonpath='{range
  .items[*]}{.metadata.name}{'\t'}{.status.podIP}{'\n'}{end}'
  

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

• A . 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
  

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

• A . Explanation:
  kubectl run nginx --image=nginx --restart=Never --port=80
  

List all the pods sorted by created timestamp

• A . Explanation:
  kubect1 get pods--sort-by=.metadata.creationTimestamp
  

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.ContextAs 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.

• A . Explanation:
  solution
  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.
  

List all the pods showing name and namespace with a json path expression

• A . Explanation:
  kubectl get pods -o=jsonpath='{.items[*]['metadata.name',
  'metadata.namespace']}'
  

List the nginx pod with custom columns POD_NAME and POD_STATUS

• A . Explanation:
  kubectl get po -o=custom-columns='POD_NAME:.metadata.name,
  POD_STATUS:.status.containerStatuses[].state'
  

Create a pod that echo ''hello world'' and then exists. Have the pod deleted automatically when it's completed

• A . Explanation:
  kubectl run busybox --image=busybox -it --rm --restart=Never --
  /bin/sh -c 'echo hello world'
  kubectl get po # You shouldn't see pod with the name 'busybox'
  

List the nginx pod with custom columns POD_NAME and POD_STATUS

• A . Explanation:
  kubectl get po -o=custom-columns='POD_NAME:.metadata.name,
  POD_STATUS:.status.containerStatuses[].state'