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CKS · Question #51

CKS Question #51: Real Exam Question with Answer & Explanation

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Submitted by stefanr· May 4, 2026Cluster Hardening

Question

You must complete this task on the `kscs002` cluster, with master node `kscs00201-master` and worker node `kscs00201-worker1`. You can switch the cluster/configuration context using the following command: `kubectl config use-context KSCS00201`. A CIS Benchmark tool was run against the kubeadm-created cluster and found multiple issues that must be addressed immediately. Fix all issues via configuration and restart the affected components to ensure the new settings take effect. Specifically, fix all of the following violations: **Violations against the API server:** - Ensure that the `--authorization-mode` argument is not set to `AlwaysAllow`. - Ensure that the `--authorization-mode` argument includes `Node`. - Ensure that the `--authorization-mode` argument includes `RBAC`. **Violations against the Kubelet:** - Ensure that the `anonymous-auth` argument is set to `false`. - Ensure that the `--authorization-mode` argument is not set to `AlwaysAllow`. **Violations against etcd:** - Ensure that the `--client-cert-auth` argument is set to `true`. Note: Use Webhook authentication/authorization where possible.

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Topics

#CIS Benchmarks#Control Plane Hardening#Kubelet Hardening#Authentication and Authorization
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