Server Side Load Balancing and Routing using Spring Cloud API Gateway and Eureka

Dockerized Spring Boot application for Server side load balancing and routing using Spring Cloud API Gateway and Eureka.

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development purposes. See running for notes on how to run the project on a system.

Prerequisites

1. Clone the project to your local environment:

   git clone https://github.com/ankitrajput0096/SpringCloud_API_Gateway_with_Eureka
   

2. You need Docker to be installed:

   Windows:

   https://download.docker.com/win/stable/Docker%20for%20Windows%20Installer.exe

   Mac:

   https://download.docker.com/mac/stable/Docker.dmg

   Ubuntu:

   https://docs.docker.com/install/linux/docker-ce/ubuntu/

Installing

Once you have docker installed on your environment, install the project dependencies via:

Build docker Image:

docker-compose build

Running

Start docker:

docker-compose up

Or

Start docker with scaled up services:

docker-compose up --scale clientone=3 --scale clienttwo=3

NOTE:

Can scale up clientone and clienttwo services to max instances of 5. If you want to scale even higher, then increase the port range in docker-compose file.

Your Spring Cloud API Gateway server should be now running on http://localhost:8000, ClientOne server should be now running on http://localhost:8080-8085 and ClientTwo server should be now running on http://localhost:8086-90 and Eureka server cluster should be now running on http://localhost:9001, http://localhost:9002, http://localhost:9003

Get an access to all exposed API's with Postman

1. Install Postman (https://www.getpostman.com)
2. Import Postman collection from the SpringCloud_API_Gateway_Eureka_SpringBoot.postman_collection.json file
3. Enjoy !!

NOTE : To see server side load balancing observe terminal logs of docker-compose. When trying to hit same endpoint multiple times parallely.

Architecture design of Spring Cloud API Gateway

Built With

• Spring Boot - Spring Boot 2
• Maven - Dependency Management
• Docker - For containerization of application
• Spring Cloud Gateway - For API Gateway, Routing and Filtering using Spring Cloud Gateway
• Eureka - For Eureka admin and client

Contributing

If you have any improvement suggestions please create a pull request and I'll review it.

Authors

• Ankit Rajput - Initial work - Github

License

This project is licensed under the MIT License

Acknowledgments

• Big thanks to Pivotal for Spring Boot framework, love it!