February 2020
Intermediate to advanced
154 pages
3h 29m
English
Content preview from Kubernetes Operators
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Chapter 2. Running Operators
In the first section of this chapter we outline the requirements for running the examples in this book, and offer advice on how to establish access to a Kubernetes cluster that satisfies those requirements. In the second section, you’ll use that cluster to investigate what Operators do by installing and using one.
By the end, you’ll have a Kubernetes cluster to use as an Operator test bed, and you’ll know how to deploy an existing Operator on it from a set of manifests. You’ll also have seen an Operator managing its application’s specific internal state in the face of changes and failures, informing your understanding of the Operator architecture and build tools presented in succeeding chapters.
Setting Up an Operator Lab
To build, test, and run Operators in the following chapters, you’ll need cluster-admin access to a cluster running Kubernetes version v1.11.0 or later. If you’ve already met these requirements, you can skip ahead to the next section. In this section we offer general advice to readers who need to set up a Kubernetes cluster, or who need a local environment for Operator development and testing.
Cluster Version Requirements
We’ve tested the examples in this book with Kubernetes releases v1.11 up to v1.16. We will state when any feature or action we examine requires a release later than v1.11.
Control plane extensibility
Kubernetes version 1.2 introduced the API extension mechanism known as the CRD in elemental form as the third party ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.