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

Customizing Istio metrics

Istio provides flexibility to observe metrics other than what comes out of the box. This provides flexibility to observe application-specific metrics. With that in mind, let’s begin by looking at the /stats/prometheus endpoint exposed by the sidecar:

% kubectl exec front-end-6c768c478-82sqw -n sock-shop -c istio-proxy -- curl -sS 'localhost:15000/stats/prometheus' | grep istio_requests_total

The following screenshot shows sample data returned by this endpoint, which is also scraped by Prometheus and is the same data you saw using the dashboard in the previous section:

Figure 7.8 – Istio metric, dimensions, and value

Figure 7.8 – Istio metric, dimensions, and value

The metric is organized in the following structure:

  • Metric name: This is the name of the metric exported by Istio. Out-of-the-box Istio generates many metric details, which can be found at https://istio.io/latest/docs/reference/config/metrics/#metrics.
  • Metric dimensions: These...