Istio by Example

Istio by Example

A basic introduction to service meshes with Istio. A variety of fully working example uses for Istio that you can experiment with. ... Deploys a sample application composed of four separate microservices used to ...

Introduction

What is a service mesh?

For all the hype, the service mesh is architecturally pretty straightforward. It’s nothing more than a bunch of userspace proxies, stuck “next” to your services (we’ll talk about what “next” means in a bit), plus a set of management processes. The proxies are referred to as the service mesh’s data plane, and the management processes as its control plane. The data plane intercepts calls between services and “does stuff” with these calls; the control plane coordinates the behavior of the proxies, and provides an API for you, the operator, to manipulate and measure the mesh as a whole.

_— Bouyant — [The Service Mesh: What Every Software Engineer Needs to Know about the World’s Most Over-Hyped Technology_](https://buoyant.io/service-mesh-manifesto/)

What about Istio?

Istio makes it easy to create a network of deployed services with load balancing, service-to-service authentication, monitoring, and more, with few or no code changes in service code. You add Istio support to services by deploying a special sidecar proxy throughout your environment that intercepts all network communication between microservices, then configure and manage Istio using its control plane functionality…

_— Istio — [What is Istio?_](https://istio.io/latest/docs/concepts/what-is-istio/)

Istio features are broadly categorized into traffic managementsecurity, and observability. In this article, we will focus exclusively on the traffic management feature.

Istio’s traffic routing rules let you easily control the flow of traffic and API calls between services. Istio simplifies configuration of service-level properties like circuit breakers, timeouts, and retries, and makes it easy to set up important tasks like A/B testing, canary rollouts, and staged rollouts with percentage-based traffic splits. It also provides out-of-box failure recovery features that help make your application more robust against failures of dependent services or the network.

kubernetes service-mesh istio

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