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)
1
Part 1: The Fundamentals
5
Part 2: Istio in Practice
10
Part 3: Scaling, Extending,and Optimizing

Setting up a Service Mesh for hybrid architecture

In this section, we will set up the Service Mesh. But first, let’s look at the steps at a high level in the Overview of the setup section and then perform implementation in the Setting up a demo app on a virtual machine section.

Overview of the setup

Envoy is a great networking software and an excellent reverse proxy; it is also widely adopted as a standalone reverse proxy. Solo.io and a few others have built API gateway solutions using Envoy, and Kong Inc. has both Kong Mesh and Kuma Service Mesh technologies, which make use of Envoy as sidecars for the data plane.

Envoy, when deployed as a sidecar, has no idea about being a sidecar; it communicates to istiod via the xDS protocols. Istio init bootstraps Envoy with the right configuration and details about istiod, and sidecar injection mounts the right certificates, which are then used by Envoy to authenticate itself with istiod; once bootstrapped, it keeps fetching...