KCSA Exam Dumps | A cluster administrator wants to enforce the use of a different container runtime depending on the application

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LinuxFoundation.KCSA.v2025-12-26.q28
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Question 3/28

A cluster administrator wants to enforce the use of a different container runtime depending on the application a workload belongs to.

A. By manually modifying the container runtime for each workload after it has been created.

B. By modifying the kube-apiserver configuration file to specify the desired container runtime for each application.

C. By configuring avalidating admission controllerwebhook that verifies the container runtime based on the application label and rejects requests that do not comply.

D. By configuring amutating admission controllerwebhook that intercepts new workload creation requests and modifies the container runtime based on the application label.

Correct Answer: D

* Kubernetes supports workload-specific runtimes viaRuntimeClass.
* Amutating admission controllercan enforce this automatically by:
* Intercepting workload creation requests.
* Modifying the Pod spec to set runtimeClassName based on labels or policies.
* Incorrect options:
* (A) Manual modification is not scalable or secure.
* (B) kube-apiserver cannot enforce per-application runtime policies.
* (C) A validating webhook can onlyreject, not modify, the runtime.
References:
Kubernetes Documentation - RuntimeClass
CNCF Security Whitepaper - Admission controllers for enforcing runtime policies.

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