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 to manage external traffic coming inside the Service Mesh using the Istio Ingress gateway, as well as how to manage internal traffic leaving the mesh via Istio Egress gateways.

We learned about virtual services and destination rules: how virtual services are used to describe the rules to route traffic to various destinations in the mesh, how destination rules are used to define the end destination, and how the destination processes the traffic routed via rules defined by virtual services. Using virtual services, we can perform weight-based traffic routing, which is also used for canary releases and blue-green deployment.

Additionally, we learned about ServiceEntry and how it is used to make Istio aware of external services so that workloads in the mesh can send traffic to services outside the mesh. And finally, we learned how Egress gateways are used to control the Egress to endpoints defined by ServiceEntry so that we can access external...