How does the Ingress find the appropriate Service?

Typically (as always in Kubernetes), it’s based on labels, but you can answer in more detail. So, when a request arrives at the cluster’s external IP address or hostname, the Ingress controller determines the appropriate backend service to route the request to. The Ingress controller relies on a Kubernetes resource called Endpoints to specify the backend service’s network address.

In Kubernetes, endpoints represent a set of network addresses (IP addresses and port numbers) corresponding to the pods’ service targets. They essentially act as a mapping between a service and the actual pods that serve the traffic for that service.

Here’s how it works:

• Service creation: When you create a Kubernetes service, Kubernetes automatically creates an Endpoints object associated with that service. The Endpoints object initially contains the IP addresses and port numbers of all pods that the...