Secure API Server Authentication and Authorization

The API server is currently configured insecurely.

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The task

Task

The API server is currently configured insecurely.

Requirements

Disable anonymous access on the API server
Configure authorization mode to use: Node,RBAC
Enable the NodeRestriction admission controller

Ensure the API server restarts successfully and the cluster remains functional.

Exam

CKS

Domain

Cluster Setup

Grading

Programmatic · partial credit

Reference

Kubernetes docs ↗

What this tests

Lock down network access, the kubelet, API authentication, and ingress TLS, and run CIS benchmark checks. On the CKS exam, Cluster Setup tasks are graded purely on what you build in the cluster — not multiple choice — so the only way to get faster is to do them on a real cluster against a clock.

Practice it for real

prepium.sh drops you into your own isolated Kubernetes cluster in the browser — no install, no credit card. You solve the task in a real terminal, hit validate, and a programmatic checker scores exactly what you got right and wrong (with partial credit). The canonical solution unlocks after you attempt it, so you learn the fast, exam-ready way to do it.

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