Lab
A Cloud Guru

Test a Dynamic Admission Controller with Terraform

In this lab, you will be asked to test the dynamic admission controller with test pods that you will create and deploy with Terraform. Two of the pods will have labels that will match the validating webhooks policy, and one of the test pods will not.

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Path Info

Level

Intermediate

Duration

1h 30m

Published

Apr 20, 2023

Challenge

Lab Setup
1. Move to the validating-admission-webhook directory.
2. Create an access key in the AWS Management Console.
  
  Note: 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 and Deploy the Webhook
1. Move to the validating-webhook directory.
2. Log in to Docker Hub from the command line.
3. Update the Makefile with your Docker Hub username.
4. Build the webhook.
  
  Note: This can take 5–10 minutes.
5. Build the Docker image.
6. Push the Docker image to Docker Hub.
7. Deploy the certs.
8. Deploy the validating webhook.
Challenge

Create and Deploy the Test Pods with Terraform
1. Create a directory called test-pods.
2. Move to the test-pods directory.
3. Create three test pods called test-app-1 , test-app-2, and test-app-3, and add a label called hello = "world" to test-app-2 and hello = "universe" to test-app-3.
4. Initialize your working directory.
5. Apply the webhook configuration.
Challenge

Confirm the Dynamic Admission Controller Is Working
1. Confirm that your validating webhook is working:
  - test-app-1 should error and not deploy.
  - test-app-2 and test-app-3 should deploy without issue.

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

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