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

Enforcing workload deployment best practices using OPA Gatekeeper

In this section, we will deploy OPA Gatekeeper using our knowledge from Chapter 11. We will then configure OPA policies to enforce that every deployment has app and version as labels, and all port names have protocol names as a prefix:

  1. Install OPA Gatekeeper. Deploy it by following the instructions in Chapter 11, in the Automating best practices using OPA Gatekeeper section:
    % kubectl apply -f https://raw.githubusercontent.com/open-policy-agent/gatekeeper/master/deploy/gatekeeper.yaml
  2. After deploying OPA Gatekeeper, you need to configure it to sync namespaces, Pods, services and Istio CRD gateways, virtual services, destination rules, and policy and service role bindings into its cache. We will make use of the configuration file we created in Chapter 11:
    $ kubectl apply -f Chapter11/05-GatekeeperConfig.yaml
    config.config.gatekeeper.sh/config created
  3. Configure OPA Gatekeeper to apply the constraints. In...