A Kubernetes cluster consists of a set of worker machines, called nodes, that run containerized applications. Every cluster has at least one worker node.he worker node(s) host the Pods that are the components of the application workload. The control plane manages the worker nodes and the Pods in the cluster.
kubelet
An agent that runs on each node in the cluster. It makes sure that containers are running in a Pod.The kubelet takes a set of PodSpecs that are provided through various mechanisms and ensures that the containers described in those PodSpecs are running and healthy. The kubelet doesn’t manage containers which were not created by Kubernetes
kube-proxy
kube-proxy is a network proxy that runs on each node in your cluster, implementing part of the Kubernetes Service concept.
Container runtime
The container runtime is the software that is responsible for running containers