- A Cloud Guru
Creating a Mutating Admission Controller Webhook for Kubernetes
Admission controllers affect what actions we let occur on our Kubernetes clusters, either by validating and approving or denying them, or by changing the actual API request objects itself. To alter these objects, we leverage a MutatingAdmissionsWebhook, which parses and updates the object before validation and deployment. In this lab, we'll write one of these webhooks!
Table of Contents
webhooks/label-add-webhook/directory, update the
app/server.jsfile to create a response object.
Create JSON Patch
Generate a file containing the label information in the appropriate format. Encode it and add it to the response object.
Deploy and Test
If using your own image:
- Generate certs.
label-add-webhook-registration.yamlwith the Base64-encoded output of
- Log in to Docker; tag and push to repo.
label-add-webhook-deploy.yamlwith your user name instead of
- Deploy webhook and test as described in the instructions.
If using the provided test image: Deploy webhook as described in the instructions.
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.