Overview

Control Plane

• One or more API Servers: Entry point for REST / kubectl
• etcd: Distributed key / value store
• Controller Manager: Always evaluating current vs desired state
• Schedular: Schedules Pods to Worker nodes

Data Plane

• Made up of worker nodes
• kubelet: Acts as a conduit between the API server and the node
• kube-proxy: Manages IP translation and routing

Kubernetes Components

When you deploy Kubernetes, you get a cluster.

A Kubernetes cluster consists of a set of worker machines, called nodes, that run containerized applications. Every cluster has at least one worker node.