February 2020
Intermediate to advanced
154 pages
3h 29m
English
Content preview from Kubernetes Operators
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Chapter 5. Sample Application: Visitors Site
Real, production-level applications are difficult. Container-based architectures are often made up of multiple services, each requiring their own configuration and installation process. Maintaining these types of applications, including the individual components and their interactions, is a time-consuming and error-prone process. Operators are designed to reduce the difficulty in this process.
A simple, one–container “Hello World” application isn’t going to provide enough complexity to fully demonstrate what Operators can do. To really help you understand the capabilities of Operators, we need an application that requires multiple Kubernetes resources with configuration values that cross between them to use for demonstration.
In this chapter we introduce the Visitors Site application, which we will use as an example in the following chapters that cover writing Operators. We’ll take a look at the application architecture and how to run the site, as well as the process of installing it through traditional Kubernetes manifests. In the chapters that follow, we’ll create Operators to deploy this application using each of the approaches provided by the Operator SDK (Helm, Ansible, and Go), and explore the benefits and drawbacks of each.
Application Overview
The Visitors Site tracks information about each request to its home page. Each time the page is refreshed, an entry is stored with details about the client, backend server, and timestamp. ...
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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.
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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.