Kubernetes Cluster Components

kube-apiserver

The kube-apiserver is the front-end for the Kubernetes control plane. It exposes the Kubernetes API.

                                
kubectl get nodes

                              

etcd

etcd is a consistent and highly-available key-value store used as Kubernetes' backing store for all cluster data.

Store all cluster data

kube-scheduler

The kube-scheduler watches for newly created Pods that have no Node assigned and selects a Node for them to run on.

Pod scheduling

kubelet

The kubelet ensures that containers are running in a Pod.

Checks container health

kube-proxy

kube-proxy maintains network rules on nodes, enabling network communication to your Pods.

iptables rules for services