kubectl port-forward for local access in Kubernetes - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the kubectl port-forward command do?

It forwards a port from a local machine to a port on a Kubernetes pod, allowing local access to the pod's service without exposing it externally.

beginner

How do you forward local port 8080 to port 80 on a pod named my-pod?

Use the command: kubectl port-forward pod/my-pod 8080:80

beginner

Can kubectl port-forward be used to access services inside a Kubernetes cluster without exposing them externally?

Yes, it allows local access to pods or services without changing cluster network settings or exposing services outside the cluster.

intermediate

What is the syntax to forward a local port to a service instead of a pod?

Use: kubectl port-forward service/ :

intermediate

Why might you use kubectl port-forward instead of exposing a service with a LoadBalancer?

Because it is quick, requires no cluster changes, and is safer for temporary access without exposing the service to the internet.

What is the correct command to forward local port 3000 to port 80 on a pod named web-pod?

A kubectl port-forward pod/web-pod 3000:80

B kubectl forward-port pod/web-pod 80:3000

C kubectl port-forward service/web-pod 80:3000

D kubectl expose pod/web-pod 3000:80

The correct syntax is kubectl port-forward pod/web-pod 3000:80 to forward local port 3000 to pod port 80.

Which resource types can kubectl port-forward forward ports to?

A Pods and Services

B Only Pods

C Only Services

D Nodes

kubectl port-forward supports forwarding to both pods and services.

What happens if you close the terminal running kubectl port-forward?

A The pod restarts

B The port forwarding continues in the background

C The port forwarding stops immediately

D The service is exposed externally

Port forwarding runs in the terminal session; closing it stops the forwarding.

Why is kubectl port-forward considered secure for local testing?

A It encrypts all traffic automatically

B It does not expose ports outside the local machine

C It requires a VPN connection

D It changes pod firewall rules

Port forwarding only opens ports on the local machine, not exposing them externally.

Which of these is NOT a valid use of kubectl port-forward?

A Testing an internal API without cluster changes

B Debugging a database inside the cluster

C Accessing a pod's web server locally

D Exposing a service to the internet permanently

Port forwarding is temporary and local; it does not expose services permanently to the internet.

Explain how kubectl port-forward helps you access a Kubernetes pod locally without exposing it externally.

Think about how you connect your computer to a service inside the cluster safely.

Describe the steps and command syntax to forward local port 5000 to port 5000 on a service named my-service.

Remember the resource type and port mapping format.