The control plane and the individual nodes consist of three main components each. Control plane • API Server The Kubernetes API server validates and configures data for API objects, including pods, replication controllers, services, etc. It serves REST operations and provides the frontend to the cluster’s shared state through which all other components communicate. • Scheduler The scheduler assigns work to the nodes, keeps track of the capacity of resources, and ensures that a worker node’s operation is within the right threshold. • Controller Manager The controller manager ensures that a cluster’s shared state is operating in the desired manner. It monitors various controllers, which respond to events. Worker Node Components: • Kubelet A kubelet keeps track of the state of a pod and ensures that every container is operating well. • Kube proxy The kube proxy is a network proxy that maintains network rules on nodes. It sends requests for work to the appropriate containers. • etcd This etcd component manages and holds the critical data that distributed systems require to operate. It is an open-source distributed key-value store that is used to share the state of a cluster. It helps with the setup of the overlay network for containers.