Kubernetes master nodes are used to manage a Kubernetes cluster. The following is a high-level diagram of such a master:
Kubernetes master
At the bottom of the preceding diagram, we have the Infrastructure, which can be a VM on-premise or in the cloud or a server (often called bare metal), as well as on-premise or in the cloud. Currently, Kubernetes masters only run on Linux. Most popular Linux distributions such as RHEL, CentOS, and Ubuntu are supported. On this Linux machine, we then have at least the following four Kubernetes services running:
- API server: This is the gateway to Kubernetes. All requests to list, create, modify, or delete any resources in the cluster must go through this service. It exposes a REST interface that tools such as kubectl use to manage the cluster and applications in the cluster.
- Controller: The controller, or more...
