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

Troubleshooting errors using debug logs

Istio components support a flexible logging scheme for debug logs. The debug log levels can be changed from a high level to a very verbose level to get details of what’s happening in the Istio control and data planes. The following two sections will describe the process for changing the log level for the Istio data and control planes. Let’s dive right in!

Changing debug logs for the Istio data plane

The following are various log levels for the Istio data plane – that is, the Envoy sidecar:

  • trace: Highest verbose log messages
  • debug: Very verbose log messages
  • info: Informative messages to know about Envoy’s execution state
  • warning/warn: Events that indicate problems and may lead to error events
  • error: Error events that are important and may impair some of Envoy’s capability but will not make Envoy completely non-functional
  • critical: Severe error events that may cause Envoy to...