The little book of Kubernetes Operators
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.
About the Author
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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