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 Wasm and its use. We learned about how Wasm is used on the web due to its high performance, and we also familiarized ourselves with how to build Wasm using Go and use it from a web browser using JavaScript. Wasm is also becoming a popular choice on the server side, especially among network proxies such as Envoy.

To get a standardized interface for implementing Wasm for proxies, there are the Proxy-Wasm ABI specifications which are low-level specifications describing the interface between Wasm and the proxy hosting the Wasm. Wasm for Envoy needs to be Proxy-Wasm compliant, but the Proxy-Wasm ABIs are difficult to work with; the Proxy-Wasm SDKs are much easier to work with. At the time of writing this chapter, there are many programming languages in which Proxy-Wasm SDK implementations are available, of which Rust, Go, C++, and AssemblyScript are among the most popular. We made use of the Envoy Wasm filter to configure a Wasm on an Envoy HTTP...