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Deploy a Dynamic Admission Controller with Terraform

In this lab, you are being asked to create a dynamic admission controller with Terraform that will use a validating admission webhook. You will create and deploy a validating webhook, along with the webhook configuration. Start by creating the webhook Docker image from the provided code. You will then update the webhook deployment Terraform code with the image, and deploy the validating webhook, as well as the webhook configuration code, to finish up the deployment.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 1h 15m
Last updated
Clock icon Aug 29, 2025

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Table of Contents

  1. Challenge

    Lab Setup

    1. Move to the validating-admission-webhook directory.

    2. Create an Access Key in the AWS console. (You need to copy the Access Key ID and Secret Key somewhere safe and accessible for the next step).

    3. Make the lab-setup.sh script executable.

    4. Run the lab-setup.sh script.

      Note: This script will run for about 10-15 minutes.

  2. Challenge

    Create the Webhook Docker Image

    Note: Make sure you have set up your Docker Hub account before doing this objective.

    1. Move into the validating-web hook directory.

    2. Log in to Docker Hub from the terminal.

    3. Update the Makefile with your Docker Hub username.

    4. Build the webhook.

      Note: This can take between 5-10 minutes.

    5. Build the Docker image.

    6. Push the Docker image to Docker Hub.

    7. Deploy the certs.

  3. Challenge

    Deploy the Validating Webhook Configuration and Webhook

    1. Update the deployment configuration file with your Docker Hub username.

    2. Initialize the working directory.

    3. Apply the configuration.

    4. Confirm the validating webhook is up and available.

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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.

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

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Follow along with the author’s guided walkthrough and build something new in your provided environment!

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