Managing Kubernetes Admission Controllers

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Managing Kubernetes Admission Controllers

Kubernetes admission controllers act on request by validating their parameters or modifying (i.e., mutating) them to meet certain requirements or criteria. In this hands-on lab, you will be tasked with enabling and disabling specific admission controllers in order to take advantage of the functionality they provide.

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Lab Info

Level

Intermediate

Last updated

Sep 05, 2025

Duration

30m

Challenge

Enable and Disable Admission Controllers
- Modify the kube-apiserver.yaml file with the following updates:
  
  Ensure that the following admission controllers are enabled: NodeRestriction, NamespaceAutoProvision, AlwaysPullImages, and PodSecurity.
  
  Ensure that the following admission controllers are disabled: MutatingAdmissionWebhook, ValidatingAdmissionWebhook, and DenyServiceExternalIPs.
  
  Save and quit the kube-apiserver.yaml file.
- Validate that the kube-apiserver pod redeploys successfully by issuing a simple kubectl command (the pod can take several seconds to redeploy).

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