Book Image

Mastering Kubernetes - Third Edition

By : Gigi Sayfan
Book Image

Mastering Kubernetes - Third Edition

By: Gigi Sayfan

Overview of this book

The third edition of Mastering Kubernetes is updated with the latest tools and code enabling you to learn Kubernetes 1.18’s latest features. This book primarily concentrates on diving deeply into complex concepts and Kubernetes best practices to help you master the skills of designing and deploying large clusters on various cloud platforms. The book trains you to run complex stateful microservices on Kubernetes including advanced features such as horizontal pod autoscaling, rolling updates, resource quotas, and persistent storage backend. With the two new chapters, you will gain expertise in serverless computing and utilizing service meshes. As you proceed through the chapters, you will explore different options for network configuration and learn to set up, operate, and troubleshoot Kubernetes networking plugins through real-world use cases. Furthermore, you will understand the mechanisms of custom resource development and its utilization in automation and maintenance workflows. By the end of this Kubernetes book, you will graduate from an intermediate to advanced Kubernetes professional.
Table of Contents (19 chapters)
17
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18
Index

Live cluster updates

One of the most complicated and risky tasks involved in running a Kubernetes cluster is a live upgrade. The interactions between different parts of the system in different versions are often difficult to predict, but in many situations, it is required. Large clusters with many users can't afford to be offline for maintenance. The best way to attack complexity is to divide and conquer. Microservice architecture helps a lot here. You never upgrade your entire system. You just constantly upgrade several sets of related microservices, and if APIs have changed, then you upgrade their clients, too. A properly designed upgrade will preserve backward-compatibility at least until all clients have been upgraded, and then deprecate old APIs across several releases.

In this section, we will discuss how to go about updating your cluster using various strategies such as rolling updates, blue-green deployments, and canary deployments. We will also discuss when it&apos...