Implementing microservices for scalability and modularity

In this section, we will dive deeply into the implementation of microservices within our ERP system. We will cover creating individual microservices, setting up communication between them, ensuring scalability and modularity, and handling data consistency. By the end of this section, you will have a comprehensive understanding of how to build, deploy, and manage microservices in a NestJS application.

Creating individual microservices

Each microservice in our ERP system will be responsible for a specific business function, such as finance, HR, or inventory management. We will start by creating a simple microservice using NestJS.

Setting up a NestJS microservice

For simplicity, we will go for a monorepo structure we have already used in Chapters 10 and 11. Let’s create one running the following command:

$ nest new api-gateway

Now, let's create a microservice for managing employee records. We will need...