https://github.com/antoniakras/k8s-crd-controller-webhook

Extended Kubernetes with Custom Resource Definitions (CRDs), custom controllers, and admission webhooks for validation and automation.
https://github.com/antoniakras/k8s-crd-controller-webhook

automation cloud-native crd devops kubernetes webhook

Last synced: about 2 months ago
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Extended Kubernetes with Custom Resource Definitions (CRDs), custom controllers, and admission webhooks for validation and automation.

• Host: GitHub
• URL: https://github.com/antoniakras/k8s-crd-controller-webhook
• Owner: antoniakras
• Created: 2025-08-23T16:27:47.000Z (10 months ago)
• Default Branch: main
• Last Pushed: 2025-08-25T13:01:35.000Z (10 months ago)
• Last Synced: 2026-05-03T15:39:42.329Z (about 2 months ago)
• Topics: automation, cloud-native, crd, devops, kubernetes, webhook
• Language: Python
• Homepage:
• Size: 4.47 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Project Overview

---------------------

## Project Overview

This project extends Kubernetes functionality by implementing:

- **Custom Resource Definitions (CRDs)** to introduce new Kubernetes resource types.

- **Custom Controllers** to manage lifecycle events of these resources.

- **Admission Webhooks** for validating and mutating requests before they reach the cluster.

## csd4140 | Antonia Krasoudaki

### Task 1

* a )

kubectl apply -f fruit-crd.yaml

* b )

kubectl apply -f basket.yaml

* c )

kubectl get fruit apple -o yaml

* d )

  kubectl get fruits

  ![1](task1/1.png)

  ### Task 2

* a )

  

docker build -t antoniakras/greeting-controller:latest .

docker push antoniakras/greeting-controller:latest

In the Dockerfile the image python:slim-buster is being pulled. It updates downloads kubectl and installs it,

At the path /app it copies the appropriate files and installs the requirements.

Finally, the controller is running.

![1](task1/1.1.png)

![1](task1/1.2.png)

* b )

  

Apply crd and the deployment:

kubectl apply -f greeting-crd.yaml

kubectl apply -f greeting-controler.yaml

In the deployment CLusterRole we use * in rules to make sure that

the right role and access is granted. ClusterRoleBinding references greeting-cluster-role 

and binds it with service account. 

At the directory crd in the screenshots 1-5  it's visible that when the kubectl describe deployments command is executed, the data and messages are correct in each case. 

  ### Task 3

  * a )

  * b )