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

Extending Istio Data Plane

Istio provides various APIs to manage data plane traffic. There is one API called EnvoyFilter that we have not yet used. The EnvoyFilter API provides a means to customize the istio-proxy configuration generated by the Istio control plane. Using the EnvoyFilter API, you can directly use Envoy filters even if they are not directly supported by Istio APIs.

There is another API called WasmPlugins, which is another mechanism to extend the istio-proxy functionality WebAssembly (Wasm) support is becoming common for proxies such as Envoy to enable developers to build extensions.

In this chapter, we will discuss these two topics; however, the content on EnvoyFilter will be brief, as you have already learned about filters and plugins for Envoy in Chapter 3. Rather, we will focus on how to invoke Envoy plugins from Istio configurations. However, we will delve deeper into Wasm with hands-on activities as usual.

In this chapter we will be covering the following...