The little book of Kubernetes Operators
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The little book of Kubernetes Operators

Learn how to write a Kubernetes Operator from scratch using Go Language and Python.

About the Book

After you read this book, you will know how Kubernetes operators work. You will be able to write an operator in Go and Python, and you could choose when to use which programming language.

Along the way, you will learn what needs to be done to get your operator deployed and running in the cluster.

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  • Categories

    • Cloud Computing
    • Computers and Programming
    • Go
    • Python
    • DevOps
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About the Author

Oz Tiram
Oz Tiram

Oz, a long time contributor to Kubernetes and many other Open Source projects, always found computers interesting. Unlike many in the computer industry, his path to the tech industry was though the geology department, where he worked on software to model chemical reactions in groundwater.

After graduating with a Master's degree in applied geology from the University of Tübingen, he turned to work on High Performance Computer systems and developing automation software. Eventually, he worked in a few startups in Munich. Finally, he decided to embark on a solo consultant career, where he helps organizations adopt cloud native computing.

Table of Contents

  • Introduction
  • Setting minikube up
  • Starting a kubernetes cluster
  • Your first Operator
  • Running the Operator inside the cluster
  • Namespaces, ServiceAccounts, and RBAC
  • Granting Grafzahl permissions
  • State management with CustomResourceDefinitions and labels
  • Events for Operators
  • Farewell BASH
  • Frameworks for building Operators
    • No framework or a minimal framework?
  • Deep diving into building an Operator
    • Basic Structure
    • Get a kubernetes client
    • Watching kubernetes resources
    • Adding the operator businness logic
    • Working with CustomResourceDefinitions
    • Generating code for working with CRDs
    • Rewriting Grafzahl with generated client code
    • Listening to Events directly
    • Emitting Events
    • Deploying your go based operator to a Kubertes cluster
  • And Now for Something Completely Different
    • Rewrite with Python
    • Listening to Events with PyKube-ng
    • Kopf - A flask like framework for operators
  • Summary
  • Appendix A - Setup kubectl alias

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