What is the command to create a port-forward tunnel in Kubernetes for testing purposes?

What is the command to create a port-forward tunnel in Kubernetes for testing purposes?

• A. kubectl forward pod/<pod_name> <local_port>:<pod_port>
• B. kubectl port-forward pod/<pod_name> <local_port>:<pod_port>
• C. kubectl tunnel port-forward <pod_name> <local_port>:<pod_port>
• D. kubectl port-tunnel pod/<pod_name> <local_port>:<pod_port>

Answer: (B)

Port-forwarding lets you reach a port on a pod from your local machine for testing without exposing the pod externally. Use kubectl port-forward pod/<pod_name> <local_port>:<pod_port> to establish the tunnel, where the local_port is what you connect to on your computer and the pod_port is the port the application inside the pod listens on. This creates a direct, temporary link through the API server to the pod and runs until you stop it ( Ctrl+C ). You can also forward to a service with a similar syntax, but the key idea is using port-forward to map a local port to a port inside the cluster pod for quick testing.

Port-forwarding lets you reach a port on a pod from your local machine for testing without exposing the pod externally. Use kubectl port-forward pod/ : to establish the tunnel, where the local_port is what you connect to on your computer and the pod_port is the port the application inside the pod listens on. This creates a direct, temporary link through the API server to the pod and runs until you stop it ( Ctrl+C ). You can also forward to a service with a similar syntax, but the key idea is using port-forward to map a local port to a port inside the cluster pod for quick testing.