How do i tie a service to a pod or a set of pods

Question

How to tie a specific service to a pod or a set of pods?

Answer 1

By declaring pods with the label(s) and by having a selector in the service which acts as a glue to stick the service to the pods.

kind: Service

apiVersion: v1
metadata:
name: my-service
spec:
  selector:
    app: MyApp
ports:
- protocol: TCP
port: 80

Let's say if we have a set of Pods that carry a label "app=MyApp" the service will start routing to those pods.