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Preparing Kubernetes for Dynamic Admission Controllers

Admission controllers vet Kubernetes objects before running and can be a powerful part of a Kubernetes cluster. However, not all Kubernetes installs are set up to use admission controllers out of the box. In this lab, we'll check to see if the provided Kubernetes setup can use the provided admission controller and then set up our Kubernetes server to use the desired controller.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 15m
Last updated
Clock icon Aug 24, 2025

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Table of Contents

  1. Challenge

    Attempt to Run Fail State

    Run the provided bad-pod.yml file to see if the admission controller stops its creation.

    Remove the Pod if it fails.

  2. Challenge

    Check Setup

    Check to see if the admission registration's API is enabled. Also, check for enabled admission controllers.

  3. Challenge

    Enable Controller

    Enable the ImagePolicyWebhook controller on the kube-apiserver.

  4. Challenge

    Test Setup

    Check that the admission controller runs as intended.

    NOTE: kube-apiserver may take several moments to restart.

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Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

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