CKA Practice Exam: Part 1

Use the following command to create a namespace named web:

kubectl create ns web

Use the following command to create a deployment named webapp:

kubectl run webapp --image=linuxacademycontent/podofminerva:latest --port=80 --replicas=3 -n web

Use the following command to get the IP address of a pod that’s a part of the deployment:

kubectl get po -o wide -n web

Use the following command to create a temporary pod with a shell to its container:

kubectl run busybox --image=busybox --rm -it --restart=Never -- sh

Use the following command (from the container’s shell) to send a request to the web pod:

wget -O- <pod_ip_address>:80

Use the following command to create the YAML for the service named web-service:

kubectl expose deployment/webapp --port=80 --target-port=80 --type=NodePort -n web --dry-run -o yaml > web-service.yaml

Use Vim to add the namespace and the NodePort to the YAML:

vim web-service.yaml

Change the name to web-service, add the namespace web, and add nodePort: 30080.

Use the following command to create the service:

kubectl apply -f web-service.yaml

Use the following command to verify that the service is responding on the correct port:

curl localhost:30080

Use the following command to modify the deployment:

kubectl edit deploy webapp -n web

Add the liveness probe and the readiness probe:

livenessProbe:
  httpGet:
    path: /healthz
    port: 8081
readinessProbe:
  httpGet:
    path: /
    port: 80

Use the following command to check if the pods are running:

kubectl get po -n web

Use the following command to check if the probes were added to the pods:

kubectl get po <pod_name> -o yaml -n web --export