Exam (elaborations)
CKAD QUESTIONS ANSWERED 2024
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Exam of 19 pages for the course CKAD at CKAD (CKAD QUESTIONS)
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CKAD QUESTIONSList all the namespaces in the cluster - answerkubectl get namespaces
kubectl get ns
List all the pods in all namespaces - answerkubectl get po --all-namespaces
List all the pods in the particular namespace - answerkubectl get po -n <namespace
name>
List all the services in the particular namespace - answerkubectl get svc -n <namespace
name>
List all the pods showing name and namespace with a json path expression -
answerkubectl get pods -o=jsonpath="{.items[*]['metadata.name',
'metadata.namespace']}"
Create an nginx pod in a default namespace and verify the pod running - answer//
creating a pod
kubectl run nginx --image=nginx --restart=Never
// List the pod
kubectl get po
Create the same nginx pod with a yaml file - answer// get the yaml file with --dry-run flag
kubectl run nginx --image=nginx --restart=Never --dry-run -o yaml > nginx-pod.yaml
// cat nginx-pod.yaml
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: nginx
name: nginx
spec:
containers:
- image: nginx
name: nginx
resources: {}
dnsPolicy: ClusterFirst
, restartPolicy: Never
status: {}
// create a pod
kubectl create -f nginx-pod.yaml
Output the yaml file of the pod you just created - answerkubectl get po nginx -o yaml
Output the yaml file of the pod you just created without the cluster-specific information -
answerkubectl get po nginx -o yaml --export
Get the complete details of the pod you just created - answerkubectl describe pod nginx
Delete the pod you just created - answerkubectl delete po nginx
kubectl delete -f nginx-pod.yaml
Delete the pod you just created without any delay (force delete) - answerkubectl delete
po nginx --grace-period=0 --force
Create the nginx pod with version 1.17.4 and expose it on port 80 - answerkubectl run
nginx --image=nginx:1.17.4 --restart=Never --port=80
Change the Image version to 1.15-alpine for the pod you just created and verify the
image version is updated - answerkubectl set image pod/nginx nginx=nginx:1.15-alpine
kubectl describe po nginx
// another way it will open vi editor and change the version
kubeclt edit po nginx
kubectl describe po nginx
Change the Image version back to 1.17.1 for the pod you just updated and observe the
changes - answerkubectl set image pod/nginx nginx=nginx:1.17.1
kubectl describe po nginx
kubectl get po nginx -w # watch it
Check the Image version without the describe command - answerkubectl get po nginx -
o jsonpath='{.spec.containers[].image}{"\n"}'
Create the nginx pod and execute the simple shell on the pod - answer// creating a pod
kubectl run nginx --image=nginx --restart=Never
// exec into the pod
kubectl exec -it nginx /bin/sh
Get the IP Address of the pod you just created - answerkubectl get po nginx -o wide
, Create a busybox pod and run command ls while creating it and check the logs -
answerkubectl run busybox --image=busybox --restart=Never -- ls
kubectl logs busybox
If pod crashed check the previous logs of the pod - answerkubectl logs busybox -p
Create a busybox pod with command sleep 3600 - answerkubectl run busybox --
image=busybox --restart=Never -- /bin/sh -c "sleep 3600"
Check the connection of the nginx pod from the busybox pod - answerkubectl get po
nginx -o wide
// check the connection
kubectl exec -it busybox -- wget -o- <IP Address>
Create a busybox pod and echo message 'How are you' and delete it manually -
answerkubectl run busybox --image=nginx --restart=Never -it -- echo "How are you"
kubectl delete po busybox
Create a busybox pod and echo message 'How are you' and have it deleted
immediately - answer// notice the --rm flagkubectl run busybox --image=nginx --
restart=Never -it --rm -- echo "How are you"
Create an nginx pod and list the pod with different levels of verbosity - answer// create a
pod
kubectl run nginx --image=nginx --restart=Never --port=80
// List the pod with different verbosity
kubectl get po nginx --v=7
kubectl get po nginx --v=8
kubectl get po nginx --v=9
List the nginx pod with custom columns POD_NAME and POD_STATUS -
answerkubectl get po -o=custom-columns="POD_NAME:.metadata.name,
POD_STATUS:.status.containerStatuses[].state"
List all the pods sorted by name - answerkubectl get pods --sort-by=.metadata.name
List all the pods sorted by created timestamp - answerkubectl get pods--sort-
by=.metadata.creationTimestamp
Create a Pod with three busy box containers with commands "ls; sleep 3600;", "echo
Hello World; sleep 3600;" and "echo this is the third container; sleep 3600" respectively
and check the status - answer// first create single container pod with dry run flag
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