The components we described previously—scheduler, Discovery Service, Global Configuration Store, and so on—are common to all Cluster Management Tools that exist today. The difference between them is how they package these components and abstract away the details. In Kubernetes, these components are aptly named Kubernetes Components.
We will distinguish between generic "components" with Kubernetes Components by using the capital case for the latter.
In Kubernetes terminology, a "component" is a process that implements some part of the Kubernetes cluster system; examples include the kube-apiserver and kube-scheduler. The sum of all components forms what you think of as the "Kubernetes system", which is formally known as the Control Plane.
Similar to how we categorized the cluster tools...
