Book Image

The Kubernetes Operator Framework Book

By : Michael Dame
1 (1)
Book Image

The Kubernetes Operator Framework Book

1 (1)
By: Michael Dame

Overview of this book

From incomplete collections of knowledge and varying design approaches to technical knowledge barriers, Kubernetes users face various challenges when developing their own operators. Knowing how to write, deploy, and pack operators makes cluster management automation much easier – and that's what this book is here to teach you. Beginning with operators and Operator Framework fundamentals, the book delves into how the different components of Operator Framework (such as the Operator SDK, Operator Lifecycle Manager, and OperatorHub.io) are used to build operators. You’ll learn how to write a basic operator, interact with a Kubernetes cluster in code, and distribute that operator to users. As you advance, you’ll be able to develop a sample operator in the Go programming language using Operator SDK tools before running it locally with Operator Lifecycle Manager, and also learn how to package an operator bundle for distribution. The book covers best practices as well as sample applications and case studies based on real-world operators to help you implement the concepts you’ve learned. By the end of this Kubernetes book, you’ll be able to build and add application-specific operational logic to a Kubernetes cluster, making it easier to automate complex applications and augment the platform.
Table of Contents (16 chapters)
1
Part 1: Essentials of Operators and the Operator Framework
4
Part 2: Designing and Developing an Operator
9
Part 3: Deploying and Distributing Operators for Public Use

FAQs about OperatorHub and the OLM

These questions relate to the building, shipping, and deployment of Operators. Topics covered include installing Operators with the OLM and submitting Operators to OperatorHub. These topics come from Chapter 6, Building and Deploying Your Operator, and Chapter 7, Installing and Running Operators with the Operator Lifecycle Manager.

What are the different ways to compile an Operator?

Like many cloud-native applications, an Operator can be compiled either as a local binary or built into a container image suitable for deploying directly onto a Kubernetes cluster. The Operator SDK provides commands to do both.

How does a basic Operator SDK project build a container image?

The Operator SDK provides Makefile targets to build a Docker image with make docker-build. By default, this copies the main Operator source code (specifically, the main controller and API) along with its assets directory to the Docker image.

How can an Operator be deployed...