Understanding Kubernetes: Part 15 -NodePort Service

If you’ve been following our Kubernetes series 2025, welcome back! For new readers, check out Part 14: Understanding Kubernetes: ClusterIP Services

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NodePort Service in Kubernetes

A NodePort Service in Kubernetes allows external traffic to access your application by exposing a specific port on each Node in the cluster. It provides a way to make a Service accessible from outside the cluster by routing traffic from <NodeIP>:<NodePort> to the underlying Pods. This type of Service is useful for debugging, local development, or when you don't have a cloud load balancer.

Example:

Suppose you have a frontend application that needs to be accessed externally for testing purposes. A NodePort Service assigns a static port on all cluster Nodes, allowing direct access to the application from outside the cluster.

Capabilities:

• External Access: Exposes applications to the outside world using <NodeIP>:<NodePort>.
• Port Allocation: Kubernetes assigns a port from the range 30000-32767 if not specified.
• Simple Setup: Provides an easy way to expose services without…