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

Understanding interactions between Istio components

When troubleshooting problems with the Service Mesh, the unexpected behavior of the mesh is likely caused by one of the following underlying issues:

  • Invalid control plane configuration
  • Invalid data plane configuration
  • Unexpected data plane

In the upcoming sections, we will explore how to diagnose the underlying reason for any such unexpected behavior with the help of various diagnostic tools provided by istio. But first, let’s look at various interactions that happen inside the mesh between istiod, data planes, and other components.

Exploring Istiod ports

Istiod exposes various ports, some of which can be used for troubleshooting. In this section, we will go through those ports, and understand what they do and how they can help with troubleshooting.

Let’s get started by looking at those ports:

  • Port 15017: This port is exposed on istiod for sidecar injection and validation. Whenever...