Kubernetes cluster

Worker Nodes

worker nodes has kublets and container runtime inside them. to run the container and to manage it.

kube proxy

forward’s the traffic to same node if service exists to prevent network overhead.

Master Nodes

that controls the worker nodes.

API server

is like a cluster gateway, and acts as a gatekeeper.

scheduler

it decides where to put the pods. like looking into the CPU and ram of nodes.

controller manager

if pod dies then restart it on the node. it detects the pod crash.

etcd

it’s a key value store. so every k8s data is stored here in key value way.