What is the NodePort service type?

The NodePort service type in Kubernetes exposes a service on a specific port on all nodes (VMs or physical machines) in the cluster. This means the service is accessible from outside the cluster using each node’s IP address and the NodePort allocated.

The NodePort type is not recommended for production workloads (especially for publicly exposing services) because it creates additional security attack vectors; the exposed port range is well-known (30000 to 32767), so potential attackers can use it for scanning.

Use case scenarios for the NodePort service type include the following:

• External access to services: When applications or services running within the cluster must be accessed from outside the cluster, NodePort services provide a straightforward way to expose them. External clients can access the service using any node’s IP address and the allocated NodePort by allocating a specific port on each node.
• Testing...