September 2021
Beginner to intermediate
145 pages
3h 14m
English
Content preview from OpenShift for Developers, 2nd Edition
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Chapter 10. Templates, Operators, and OpenShift Automation
You’ve used templates and Operators throughout this book. Both automate repetitive tasks. This chapter provides more detail about these two mechanisms and relates them to the principle of automation in OpenShift. Triggering builds and deployments when source code changes, restarting failed pods, and an Operator upgrading your application’s database server are all ways of delegating to software some of the toil of operating software.
An OpenShift template automates the creation of a set of resources so that it can describe, for example, an application’s components and then be repeatedly processed to deploy that application. An Operator also deploys an application and its resources, but an Operator continues to watch and govern those resources over their entire life cycle. The most advanced Operators turn their applications into managed services. You took steps in an administrator role to set up Operators for Pipelines and other services. But consider the process after that was done: back in your developer role, you selected and instantiated services in your Project without much concern for the details of their deployment and administration. The Operator created the resources, started the services, and kept them running so that you could use them in your application.
Templates
A template is a list of objects and the named parameters of their configuration. Each time OpenShift processes a template, it inserts values for ...
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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.