Book Image

gRPC Go for Professionals

By : Clément Jean
Book Image

gRPC Go for Professionals

By: Clément Jean

Overview of this book

In recent years, the popularity of microservice architecture has surged, bringing forth a new set of requirements. Among these, efficient communication between the different services takes center stage, and that's where gRPC shines. This book will take you through creating gRPC servers and clients in an efficient, secure, and scalable way. However, communication is just one aspect of microservices, so this book goes beyond that to show you how to deploy your application on Kubernetes and configure other tools that are needed for making your application more resilient. With these tools at your disposal, you’ll be ready to get started with using gRPC in a microservice architecture. In gRPC Go for Professionals, you'll explore core concepts such as message transmission and the role of Protobuf in serialization and deserialization. Through a step-by-step implementation of a TODO list API, you’ll see the different features of gRPC in action. You’ll then learn different approaches for testing your services and debugging your API endpoints. Finally, you’ll get to grips with deploying the application services via Docker images and Kubernetes.
Table of Contents (13 chapters)

Tracing API calls

On top of logging, which simply describes the events in a developer-friendly manner, you might need to get metrics that can get aggregated by dashboard tools. These metrics might include requests per second, distribution of status (Ok, Internal, and so on), and many others. In this section, we are going to instrument our code with OpenTelemetry and Prometheus so that tools such as Grafana can be used to create dashboards.

The first thing to understand is that we are going to run an HTTP server for Prometheus metrics. Prometheus exposes the metrics to external tools on the /metrics route so that the tools wanting to query the data get a sense of all the kinds of metrics available.

So, to create such a server, we are going to get a dependency on Prometheus’ Go library. We are going to do that by getting the dependency on the go-grpc-middleware/providers/prometheus. The Prometheus Go library is a transitive dependency of this one and we still need to be...