Kubectl for cluster management in Azure - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ service_behavior

intermediate

What is the output of this kubectl command?

You run kubectl get pods --namespace=default in your Azure Kubernetes cluster. What will this command display?

A A list of all nodes in the cluster with their IP addresses.

B A list of all pods running in the default namespace with their status and age.

C The detailed configuration of the default namespace.

D The logs of the most recently created pod in the default namespace.

💡 Hint

Think about what 'get pods' and 'namespace' mean in kubectl commands.

The command 'kubectl get pods --namespace=default' lists all pods in the default namespace, showing their names, statuses, and how long they've been running.

❓ Configuration

intermediate

Which kubectl command correctly scales a deployment?

You want to scale the deployment named webapp to 5 replicas in your Azure Kubernetes cluster. Which command will do this?

A kubectl scale deployment webapp --replicas=5

B kubectl set replicas webapp 5

C kubectl update deployment webapp replicas 5

D kubectl deploy scale webapp 5

💡 Hint

Look for the standard kubectl subcommand to change replicas.

The correct syntax to scale a deployment is 'kubectl scale deployment --replicas='.

❓ security

advanced

What error occurs when running kubectl without proper cluster credentials?

You run kubectl get pods but your kubeconfig file is missing or invalid. What error message will you most likely see?

A error: You must be logged in to the server (Unauthorized)

B error: resource not found

C error: invalid command syntax

D error: pod not ready

💡 Hint

Think about authentication errors when credentials are missing.

Without valid credentials, kubectl cannot authenticate and returns an Unauthorized error.

❓ Architecture

advanced

Which kubectl command shows the node where a pod is running?

You want to find out on which node the pod named backend-xyz is running. Which command will give you this information?

A kubectl get nodes backend-xyz

B kubectl describe node backend-xyz

C kubectl get pod backend-xyz -o wide

D kubectl logs backend-xyz

💡 Hint

Look for a command that shows detailed pod info including node name.

The '-o wide' option with 'kubectl get pod' shows extra details including the node name where the pod runs.

✅ Best Practice

expert

What is the recommended way to update a deployment image without downtime?

You want to update the container image of deployment api-server to api:v2 in your Azure Kubernetes cluster. Which kubectl command follows best practices to avoid downtime?

A kubectl delete deployment api-server && kubectl create deployment api-server --image=api:v2

B kubectl scale deployment api-server --replicas=0; kubectl set image deployment/api-server api=api:v2; kubectl scale deployment api-server --replicas=3

C kubectl edit deployment api-server and manually change the image field

D kubectl set image deployment/api-server api=api:v2

💡 Hint

Consider commands that update images with rolling updates.

Using 'kubectl set image' updates the deployment image and triggers a rolling update, avoiding downtime.