This repository shows how you can build API with microservice architecture using nestjs

Features of this example

This example is basically an API for some task manager application. It provides a possibility to perform sign up users, confirm user's emails, manage user's tasks.

Running the example with docker-compose

Execute docker network create infrastructure && cp .env.example .env && docker-compose up -d from the root of the repository

Accessing the API itself and swagger docs for the API

• Once you launch the API it will be accessible on port 8000.
• Swagger docs for the API will be accessible locally via URI "http://localhost:8000/api"

Launch services for integration testing (using docker-compose)

• Execute sudo vim /etc/hosts and add line 127.0.0.1 db to it. This is a temporary step, it will not be required since new update.
• Execute cp .env.example .env && cp .env.test.example .env.test
• Execute docker-compose -f ./docker-compose.test.yml up -d from the root of the repository
• Run cd ./gateway && npm install && npm run test from the root of this repo

Brief architecture overview

This API showcase consists of the following parts:

• API gateway
• Token service - responsible for creating, decoding, destroying JWT tokens for users
• User service - responsible for CRUD operations on users
• Mailer service - responsible for sending out emails (confirm sign up)
• Permission service - responsible for verifying permissions for logged in users.
• Tasks service - responsible for CRUD operations on users tasks records
• The service interact via TCP sockets

This example uses a SINGLE database (MongoDB) instance for all microservices. This is not a correct point, the correct way is to use a separate DB instance for every microservice. I used one DB instance for all microservices to simplify this example.