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First Attempt Guaranteed Success in CKA Exam 2023 [Q13-Q32]

First Attempt Guaranteed Success in CKA Exam 2023

Real CKA Exam Questions are the Best Preparation Material

How much CNCF CKA Certification Exam Cost and Details

• No. of Questions: 17 Questions
• Examination Fees: $375 USD
• Types of questions: Multiple Choice Questions
• Retake Exam: Free
• Examination Name: CNCF CKA Certification

NO.13 List all the pods showing name and namespace with a json path expression

kubectl get pods -o=jsonpath=”{.items[*][‘metadata.name’,
‘metadata.namespace’]}”

NO.14 Ensure a single instance of podnginxis running on each node of theKubernetes cluster wherenginxalso represents the Image name whichhas to be used. Do not override anytaints currently in place.
UseDaemonSetto complete thistask and useds-kusc00201asDaemonSet name.

See the solution below.
Explanation
solution

NO.15 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

See the solution below.
Explanation
solution

NO.16 Create a redis pod named “test-redis” and exec into that pod and create a file named “test-file.txt” with the text ‘This is called the test file’ in the path /data/redis and open another tab and exec again with the same pod and verifies file exist in the same path.

 vim test-redis.yaml
apiVersion: v1
kind: Pod
metadata:
name: test-redis
spec:
containers:
– name: redis
image: redis
ports:
– containerPort: 6379
volumeMounts:
– mountPath: /data/redis
name: redis-storage
volumes:
– name: redis-storage
emptyDir: {}
kubectl apply -f redis-pod-vol.yaml
// first terminal
kubectl exec -it test-redis /bin/sh
cd /data/redis
echo ‘This is called the test file’ > file.txt
//open another tab
kubectl exec -it test-redis /bin/sh
cat /data/redis/file.txt

 vim test-redis.yaml
apiVersion: v1
kind: Pod
metadata:
name: test-redis
spec:
containers:
– name: redis
image: redis
ports:
– containerPort: 6379
volumeMounts:
– mountPath: /data/redis
name: redis-storage
volumes:
kubectl exec -it test-redis /bin/sh
cd /data/redis
echo ‘This is called the test file’ > file.txt
//open another tab
kubectl exec -it test-redis /bin/sh
cat /data/redis/file.txt

NO.17 Create a pod that echo “hello world” and then exists. Have the pod deleted automatically when it’s completed

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”

NO.18 List “nginx-dev” and “nginx-prod” pod and delete those pods

See the solution below.
Explanation
kubect1 get pods -o wide
kubectl delete po “nginx-dev”kubectl delete po “nginx-prod”

NO.19 List all the pods sorted by name

See the solution below.
Explanation
kubect1 get pods –sort-by=.metadata.name

NO.20 Score: 5%

Task
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/KUTR00401/KUTR00401.txt (which already exists).

Solution:
kubectl top -l name=cpu-user -A
echo ‘pod name’ >> /opt/KUT00401/KUT00401.txt

NO.21 Set the node namedek8s-node-1asunavailable and reschedule all thepods running on it.

See the solution below.
Explanation
solution

NO.22 List all the pods sorted by created timestamp

See the solution below.
Explanation
kubect1 get pods–sort-by=.metadata.creationTimestamp

NO.23 Create a configmap called cfgvolume with values var1=val1,
var2=val2 and create an nginx pod with volume nginx-volume which
reads data from this configmap cfgvolume and put it on the path
/etc/cfg

 // first create a configmap cfgvolume
kubectl create cm cfgvolume –from-literal=var1=val1 –fromliteral=var2=val2
// verify the configmap
kubectl describe cm cfgvolume
// create the config map
kubectl create -f nginx-volume.yml
vim nginx-configmap-pod.yaml
apiVersion: v1
kind: Pod
– name: nginx-volume
configMap:
name: cfgvolume
containers:
– image: nginx
name: nginx
volumeMounts:
– name: nginx-volume
mountPath: /etc/cfg
restartPolicy: Always
k kubectl apply -f nginx-configmap-pod.yaml
/ // Verify
// exec into the pod
kubectl exec -it nginx — /bin/sh
// check the path
cd /etc/cfg

 // first create a configmap cfgvolume
kubectl create cm cfgvolume –from-literal=var1=val1 –fromliteral=var2=val2
// verify the configmap
kubectl describe cm cfgvolume
// create the config map
kubectl create -f nginx-volume.yml
vim nginx-configmap-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: nginx
name: nginx
spec:
volumes:
– name: nginx-volume
configMap:
name: cfgvolume
containers:
– image: nginx
name: nginx
volumeMounts:
– name: nginx-volume
mountPath: /etc/cfg
restartPolicy: Always
k kubectl apply -f nginx-configmap-pod.yaml
/ // Verify
// exec into the pod
kubectl exec -it nginx — /bin/sh
// check the path
cd /etc/cfg

NO.24 Set the node named ek8s-node-1 as unavailable and reschedule all the pods running on it.

solution

NO.25 Score: 4%

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

SOLUTION:
[student@node-1] > ssh ek8s
kubectl cordon ek8s-node-1
kubectl drain ek8s-node-1 –delete-local-data –ignore-daemonsets –force

NO.26 Create a configmap called myconfigmap with literal value
appname=myapp

 kubectl create cm myconfigmap –from-literal=appname=myapp
// Verify
kubectl get cm -o yaml
(or)
kubectl describe cm

 kubectl create cm myconfigmap –from-literal=appname=myapp
// Verify
(or)
kubectl describe cm

NO.27 Create a redis pod, and have it use a non-persistent storage
Note: In exam, you will have access to kubernetes.io site,
Refer : https://kubernetes.io/docs/tasks/configure-pod-container/configurevolume-storage/

 apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
containers:
– name: redis
image: redis
volumeMounts:
– name: redis-storage
mountPath: /data/redis
ports:
– containerPort: 6379
volumes:
– name: redis-storage
emptyDir: {}

 apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
containers:
– name: redis
image: redis
volumeMounts:
– containerPort: 6379
volumes:
– name: redis-storage
emptyDir: {}

NO.28 Check the Image version of nginx-dev pod using jsonpath

See the solution below.
Explanation
kubect1 get po nginx-dev -o
jsonpath='{.spec.containers[].image}{“\n”}’

NO.29 An Administrator is configuring Authentication Enforcement and they would like to create an exemption rule to exempt a specific group from authentication. Which authentication enforcement object should they select?

 default-web-form

 default-no-captive-port

 default-browser-challenge

 default-authentication-bypass

NO.30 Create 2 nginx image pods in which one of them is labelled with env=prod and another one labelled with env=dev and verify the same.

 kubectl run –generator=run-pod/v1 –image=nginx — labels=env=prod nginx-prod –dry-run -o yaml > nginx-prodpod.yaml Now, edit nginx-prod-pod.yaml file and remove entries like “creationTimestamp: null” “dnsPolicy: ClusterFirst” vim nginx-prod-pod.yaml apiVersion: v1 kind: Pod metadata:
labels:
env: prod
name: nginx-prod
spec:
containers:
– image: nginx
name: nginx-prod
restartPolicy: Always
# kubectl create -f nginx-prod-pod.yaml
kubectl run –generator=run-pod/v1 –image=nginx —
labels=env=dev nginx-dev –dry-run -o yaml > nginx-dev-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
env: dev
name: nginx-dev
spec:
containers:
– image: nginx
name: nginx-dev
restartPolicy: Always
# kubectl create -f nginx-prod-dev.yaml
Verify :
kubectl get po –show-labels
kubectl get po -l env=prod
kubectl get po -l env=dev

 kubectl run –generator=run-pod/v1 –image=nginx — labels=env=prod nginx-prod –dry-run -o yaml > nginx-prodpod.yaml Now, edit nginx-prod-pod.yaml file and remove entries like “creationTimestamp: null” “dnsPolicy: ClusterFirst” vim nginx-prod-pod.yaml apiVersion: v1 kind: Pod metadata:
labels:
env: prod
name: nginx-prod
spec:
containers:
– image: nginx
name: nginx-prod
restartPolicy: Always
# kubectl create -f nginx-prod-pod.yaml
kubectl run –generator=run-pod/v1 –image=nginx —
labels=env=dev nginx-dev –dry-run -o yaml > nginx-dev-pod.yaml
apiVersion: v1
kind: Pod
metadata:
– image: nginx
name: nginx-dev
restartPolicy: Always
# kubectl create -f nginx-prod-dev.yaml
Verify :
kubectl get po –show-labels
kubectl get po -l env=dev

NO.31 Monitor the logs of pod foo and:
* Extract log lines corresponding unable-to-access-website
* Write them to/opt/KULM00201/foo

See the solution below.
Explanation
solution

NO.32 Score: 4%

Task
Check to see how many nodes are ready (not including nodes tainted NoSchedule ) and write the number to /opt/KUSC00402/kusc00402.txt.

Solution:
kubectl describe nodes | grep ready|wc -l
kubectl describe nodes | grep -i taint | grep -i noschedule |wc -l
echo 3 > /opt/KUSC00402/kusc00402.txt
#
kubectl get node | grep -i ready |wc -l
# taints、noSchedule
kubectl describe nodes | grep -i taints | grep -i noschedule |wc -l
#
echo 2 > /opt/KUSC00402/kusc00402.txt

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