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

Building application resiliency using load balancing

Load balancing is another technique to improve application resiliency. Istio load balancing policies help you maximize the availability of your application by distributing network traffic efficiently across the microservices or underlying services. Load balancing uses destination rules. Destination rules define the policy that controls how the traffic should be handled by the service after routing has occurred.

In the previous chapter, we used destination rules for traffic management purposes. In this section, we will go through various load balancing strategies provided by Istio and how to configure them using destination rules.

Deploy another envoydummy Pod but with an additional label of version:v2 this time and an output of V2----------Bootstrap Service Mesh Implementation with Istio----------V2. The config is available in Chapter5/envoy-proxy-02.yaml:

$ kubectl apply -f Chapter5/envoy-proxy-02.yaml

Istio supports...