Book Image

Bootstrapping Service Mesh Implementations with Istio

By : Anand Rai
4 (1)
Book Image

Bootstrapping Service Mesh Implementations with Istio

4 (1)
By: Anand Rai

Overview of this book

Istio is a game-changer in managing connectivity and operational efficiency of microservices, but implementing and using it in applications can be challenging. This book will help you overcome these challenges and gain insights into Istio's features and functionality layer by layer with the help of easy-to-follow examples. It will let you focus on implementing and deploying Istio on the cloud and in production environments instead of dealing with the complexity of demo apps.  You'll learn the installation, architecture, and components of Istio Service Mesh, perform multi-cluster installation, and integrate legacy workloads deployed on virtual machines. As you advance, you'll understand how to secure microservices from threats, perform multi-cluster deployments on Kubernetes, use load balancing, monitor application traffic, implement service discovery and management, and much more. You’ll also explore other Service Mesh technologies such as Linkerd, Consul, Kuma, and Gloo Mesh. In addition to observing and operating Istio using Kiali, Prometheus, Grafana and Jaeger, you'll perform zero-trust security and reliable communication between distributed applications. After reading this book, you'll be equipped with the practical knowledge and skills needed to use and operate Istio effectively.
Table of Contents (19 chapters)
Part 1: The Fundamentals
Part 2: Istio in Practice
Part 3: Scaling, Extending,and Optimizing


In this chapter, we read about how Istio enables application resiliency and testing by providing options to inject delays and faults into request processing. Fault injection assists in validating an application’s resiliency when there is unexpected degradation in underlying services, as well as the network and infrastructure. After fault injection, we read about request timeouts and how they improve application resiliency. For transient failures, it might be a wise idea to make a few retries before giving up on the request and hence, we practiced configuring Istio to perform service retries. Fault injection, timeouts, and retries are properties of VirtualServices and are carried out before routing a request to upstream services.

In the second part of the chapter, we read about various load balancing policies and how you can configure load balancing policies based on the dynamic behavior of an upstream service. Load balancing helps to distribute traffic to upstream...