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)
Other Books You May Enjoy

Understanding the Istio architecture

In this section, we will get to know Istio a little better.

First, let’s meet the main components of Istio and understand what they do and how they relate.

Istio is a large framework that provides a lot of capabilities, and it has multiple parts that interact with each other and with Kubernetes components (mostly indirectly and unobtrusively). It is divided into a control plane and a data plane. The data plane is a set of proxies (one per pod). Their control plane is a set of components that are responsible for configuring the proxies and collecting telemetry data.

The following diagram illustrates the different parts of Istio, how they are related to each other, and what information is exchanged between them.

Figure 14.5: Istio architecture

As you can see, there are two primary components: the Envoy proxy, which is the sidecar container attached to every service instance (every pod), and istiod, which is responsible...