Up until now, we were able to deploy containers into Kubernetes and keep them alive by making use of pods, Replica Sets, and Horizontal Pods Autoscalers as well as Deployments, but so far, you have not learned how to expose applications to the outer world or make use of service discovery and balancing within Kubernetes.
Services are responsible for all of the above. A Service in Kubernetes is not an element as we are used to it. A Service is an abstract concept used to give entity to a group of pods through pattern matching and expose them to different channels via the same interface: a set of labels attached to a Pod that get matched against a selector (another set of labels and rules) in order to group them.
First, let's create ...
