Book Image

Mastering Kubernetes - Fourth Edition

By : Gigi Sayfan
3.3 (3)
Book Image

Mastering Kubernetes - Fourth Edition

3.3 (3)
By: Gigi Sayfan

Overview of this book

The fourth edition of the bestseller Mastering Kubernetes includes the most recent tools and code to enable you to learn the latest features of Kubernetes 1.25. This book contains a thorough exploration of complex concepts and best practices to help you master the skills of designing and deploying large-scale distributed systems on Kubernetes clusters. You’ll learn how to run complex stateless and stateful microservices on Kubernetes, including advanced features such as horizontal pod autoscaling, rolling updates, resource quotas, and persistent storage backends. In addition, you’ll understand how to utilize serverless computing and service meshes. Further, two new chapters have been added. “Governing Kubernetes” covers the problem of policy management, how admission control addresses it, and how policy engines provide a powerful governance solution. “Running Kubernetes in Production” shows you what it takes to run Kubernetes at scale across multiple cloud providers, multiple geographical regions, and multiple clusters, and it also explains how to handle topics such as upgrades, capacity planning, dealing with cloud provider limits/quotas, and cost management. By the end of this Kubernetes book, you’ll have a strong understanding of, and hands-on experience with, a wide range of Kubernetes capabilities.
Table of Contents (21 chapters)
19
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20
Index

Working with Istio

In this section, we will work with Istio resources and policies and utilize them to improve the operation of the BookInfo application.

Let’s start with traffic management.

Traffic management

Istio traffic management is about routing traffic to your services according to the destination rules you define. Istio keeps a service registry for all your services and their endpoints. Basic traffic management allows traffic between each pair of services and does simple round-robin load balancing between each service instance. But Istio can do much more. The traffic management API of Istio consists of five resources:

  • Virtual services
  • Destination rules
  • Gateways
  • Service entries
  • Sidecars

Let’s start by applying the default destination rules for BookInfo:

$ kb apply -f https://raw.githubusercontent.com/istio/istio/release-1.15/samples/bookinfo/networking/destination-rule-all.yaml
destinationrule.networking...