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DevOps & Automation · Intermediate

kube-apiserver

The Kubernetes component that exposes the REST API and is the front end and only component that talks directly to etcd.

Definition

All clients and components communicate through the API server, which authenticates, authorizes (RBAC), runs admission control, validates, and persists objects to etcd.

Example

kubectl get nodes sends an authenticated HTTPS GET to the API server.

Exam tip

Only the API server talks to etcd; the request flow is authentication, authorization, then admission.

Related terms