How to Use Kubectl Port-forward in Kubernetes Applications

This article discusses the use of kubectl port-forward command in Kubernetes to set up port forwarding to applications running on a cluster. Port forwarding is useful for debugging, testing, and accessing services during development. The basic syntax and options available for the kubectl port-forward command are explained. The difference between kubectl port-forward and kubectl proxy is also highlighted. Various use cases of port forwarding such as debugging, accessing web applications, database access, internal service access, testing APIs, interacting with sidecar containers, and testing load-balanced services are discussed. The article provides examples on how to port forward to a pod, service, and deployment. It also covers running kubectl port-forward in the background, configuring it to bind to 0.0.0.0, starting and stopping port forwarding, and best practices for using it. Alternatives to kubectl port-forward are also mentioned.