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| Vendor: | Linux Foundation |
|---|---|
| Exam Code: | CKA |
| Exam Name: | Certified Kubernetes Administrator |
| Exam Questions: | 83 |
| Last Updated: | January 6, 2026 |
| Related Certifications: | Kubernetes Administrator |
| Exam Tags: | Intermediate Kubernetes DevOps Engineers and System Administrators |
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SIMULATION
Create a pod that having 3 containers in it? (Multi-Container)
image=nginx, image=redis, image=consul
Name nginx container as ''nginx-container''
Name redis container as ''redis-container''
Name consul container as ''consul-container''
Create a pod manifest file for a container and append container
section for rest of the images
kubectl run multi-container --generator=run-pod/v1 --image=nginx --
dry-run -o yaml > multi-container.yaml
# then
vim multi-container.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: multi-container
name: multi-container
spec:
containers:
- image: nginx
name: nginx-container
- image: redis
name: redis-container
- image: consul
name: consul-container
restartPolicy: Always
SIMULATION
Check the image version in pod without the describe command
kubectl get po nginx -o
jsonpath='{.spec.containers[].image}{'\n'}'
SIMULATION
Score: 7%

Task
Given an existing Kubernetes cluster running version 1.20.0, upgrade all of the Kubernetes control plane and node components on the master node only to version 1.20.1.
Be sure to drain the master node before upgrading it and uncordon it after the upgrade.

You are also expected to upgrade kubelet and kubectl on the master node.

SOLUTION:
[student@node-1] > ssh ek8s
kubectl cordon k8s-master
kubectl drain k8s-master --delete-local-data --ignore-daemonsets --force
apt-get install kubeadm=1.20.1-00 kubelet=1.20.1-00 kubectl=1.20.1-00 --disableexcludes=kubernetes
kubeadm upgrade apply 1.20.1 --etcd-upgrade=false
systemctl daemon-reload
systemctl restart kubelet
kubectl uncordon k8s-master
SIMULATION
List all the pods showing name and namespace with a json path expression
kubectl get pods -o=jsonpath='{.items[*]['metadata.name',
'metadata.namespace']}'
SIMULATION
Score: 4%

Task
Check to see how many nodes are ready schedulable (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
# taintsnoSchedule
kubectl describe nodes | grep -i taints | grep -i noschedule |wc -l
#
echo 2 > /opt/KUSC00402/kusc00402.txt
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