balaji-venkatesan/nginx-loadbalancer

Nginx load balancing and reverse proxy:

Using nginx as reverse proxy and loadbalancer.

• java backend
• Reactjs frontend. here
• Nginx webserver. here

Nginx reverse proxy

• Based on the URL path, the request will be forwarded to the corresponding service.

• The root request / will be forwarded to the frontend which runs in port 3000

• Request to /health will be forwarded to API service which is running in port 8080

Nginx load balancing:

upstream appserver {
        # using least connection as the algorithm for loadbalancing, there are lot of loadbalaning algorithms available in nginx
        # health check based loadbalaning is also supported
        # TODO: change the localhost to ip address of the host
        least_conn;
        server 127.0.0.1:8080;
        server 127.0.0.1:8082;
        server 127.0.0.1:8083;
    }

• We are running 3 instances of the API server in a different port, and for load balancing, we have created an upstream and used the least connection as the algorithm.
• 1 instance of reactjs application

TODO

Move reactjs and nginx to parent directory, as of now it is inside the java project. Use docker compose.