Deploy a Dynamic Admission Controller with Terraform

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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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Lab Info

Level

Intermediate

Last updated

Sep 22, 2025

Duration

1h 15m

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.
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.
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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