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

Chapter 7: Installing and Running Operators with the Operator Lifecycle Manager

Up until now, the Operator development work covered in previous chapters has been mostly self-contained. That is, the development and deployment processes covered so far have been primarily focused on local environments with relatively few external services expected to interact with the Operator we have been writing. While these processes are useful (and in some ways essential) to the early design of an Operator, there is an expectation for most Operators (and indeed, most software projects in general) that they will eventually be exposed to the outside world. This chapter will focus on this phase of an Operator's lifespan, wherein the Operator is presented and consumed by external users.

In Chapter 1, Introduction to the Operator Framework, the three main pillars of the Operator Framework were introduced. Several chapters of this book have already been devoted to the first pillar (the Operator...