How deeply does Kubernetes in Action, Second Edition cover Istio?

Defines the two roles, installation workflow, controller relationship, namespace, and verification step without detailing service-mesh internals.

Istio

As explained in Kubernetes in Action, Second Edition

Istio is an open-source service mesh platform that provides traffic management, security, and observability for services.

Istio is a service-mesh platform and a Gateway API provider for Kubernetes. As a service mesh, it supports observability, traffic management, and security between services without code changes. As a Gateway API provider, it turns Gateway API resources into working traffic gateways. section 13.1.2

Istio’s role in Gateway API deployment is straightforward:

Gateway API resources provide configuration, but resources alone do nothing. section 13.1.3
Istio supplies the controllers that bring those resources to life. section 13.1.3
You can use Istio for Gateway API support without adopting its service-mesh functionality. section 13.1.2
Google Kubernetes Engine can provide its own Gateway API implementation, so installing Istio is not required there. section 13.1.2 section 13.1.3

Install Istio as a Gateway API provider

Install the istioctl command-line tool, run istioctl install -y --set profile=minimal, and verify that an istiod pod is running in the istio-system namespace. The ready istiod container hosts the controllers needed to manage Gateway API resources. section 13.1.3

$ curl -sL https://istio.io/downloadIstioctl | sh -

Use the installation command as the first step in deploying Istio with istioctl. section 13.1.3

$ istioctl install -y --set profile=minimal

Install Istio with the minimal profile after downloading istioctl. section 13.1.3

$ kubectl get pods -n istio-system
NAME                      READY   STATUS    RESTARTS   AGE
istiod-7448594799-fwd44   1/1     Running   0          54s      #1

Confirm deployment by checking for a ready istiod pod in istio-system. section 13.1.3

How Kubernetes in Action, Second Edition covers it

Cover of Kubernetes in Action, Second Edition

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Also explained in

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Platform Engineering on KubernetesIstio is an open-source service mesh platform that manages and secures communication between services and provides traffic-routing and observability features.
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Google Anthos in ActionIstio is an open-source service mesh that provides traffic management, security, and observability for distributed services.

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Related concepts

service meshkind of · A service mesh is an infrastructure layer that manages communication and cross-cutting concerns such as traffic control, security, and observability between distributed services.
traffic managementuses · Traffic management is the coordinated control, routing, distribution, or shaping of moving flows through a system.
automatic sidecar injectionuses · Automatic sidecar injection is the admission-time addition of a proxy sidecar to newly created pods based on cluster configuration.
Argo Rolloutsused by · Argo Rollouts is an open-source Kubernetes controller that manages progressive delivery strategies, including canary and blue-green deployments.
gateway apiimplements · The Kubernetes Gateway API is a networking standard for defining gateways, listeners, and traffic routing between external clients and cluster services.

This explainer was generated by Manning's knowledge graph from the text of Kubernetes in Action, Second Edition. The section links point to the parts of the book it draws on.