Kubernetes controller

Overview

This project helps you understand Kubernetes controller concept by providing step-by-step instructions on how to build a Kubernetes controller from scratch.

It's perfect for developers who want to:

• Learn and understand how to build a Kubernetes conroller

Inspired by Golang Kubernetes Controller Tutorial

Authors: Den Vasyliev and Alex Sudom

Features

• A starter template for building Kubernetes controllers or CLI tools in Go using cobra-cli.
• Zerolog logging
• POSIX/GNU-style --flags with Pflag

Prerequisites

• Basic understanding of Kubernetes concepts
• up & running control-plane

CI

To setup GitHub Actions workflow follow steps described below:

1. Generate PAT (personal access token). Select listed scopes: write:packages, repo. Copy secret.
2. Go to Settings tab of your repository, choose Security section and select Actions. Create a New repository secret with name K8S_CONTROLLER_TOKEN, paste secret copied generated on step 1.

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Steps

1. Cobra CLI ✅
2. Zerolog logging ✅
3. Pflag, implementing POSIX/GNU-style --flags ✅
4. Fast HTTP ✅
5. Makefile, CI ✅
6. kubernetes/client-go ✅
7. Informer ✅
8. API handler ✅
9. controller-runtime ✅
10. Leader election ✅
11. FrontendPage CRD and Advanced Controller Implementation