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)

RPC operations

Each interaction done with gRPC between the server and the client can be described as four RPC operations. These operations are composed in a way that creates complex high-level operations in the framework. Let us see these operations and then I will explain how a simple gRPC call uses them.

Important note

In this section, I’m going to use Wireshark’s result for an RPC call. I will explain how to replicate what I did in this section later in the book. For now, I will just highlight what is important to notice in the dumps.

Send Header

The Send Header operation lets the server know that the client will send a request or lets the client know that the server will send a response. This acts as a switch between the server and client to let both sides know who needs to read and who needs to write.

By using Wireshark to analyze a simple gRPC call, we can observe the following header (simplified) being sent by the client in order to let the server...