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

Automating best practices using OPA Gatekeeper

To avoid human errors, you can define the best practices and constraints in the form of policies that can then be enforced automatically whenever a resource is created, deleted, or updated in the cluster. Automated policy enforcement ensures consistency and adherence to best practices without compromising agility and deployment velocity. One such software is Open Policy Agent (OPA) Gatekeeper, which is an admission controller that enforces policies based on the custom resource definition (CRD), executed by OPA. OPA Gatekeeper enables the enforcement of guard rails; any istio configuration not within the guard rails is automatically rejected. It also allows cluster administrators to audit the resources in breach of best practices. Using the following steps, we will set up OPA Gatekeeper, followed by the configuration to enforce some of the best practices for istio. Let’s get started!

  1. Install Gatekeeper using the following...