nginx.conf

events {}
worker_processes auto;

http {
    upstream edge_servers {
        least_conn;  # Use least connections algorithm
        server host.docker.internal:3001;
        server host.docker.internal:3002;
        server host.docker.internal:3003;
    }

    upstream main_server {
        server host.docker.internal:8080;  # Main server
    }

    # Map method to destination
    map $request_method $upstream_server {
        default         http://main_server;    # Default to main server
        GET             http://edge_servers;  # GET requests to edge servers
    }

    server {
        listen 80;

        location / {
            proxy_pass $upstream_server;       # Use mapped upstream
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        # Access log with cache status for monitoring
        # log_format cache_status '$remote_addr - $host [$time_local] '
        #                         '"$request" $status $body_bytes_sent '
        #                         '"$http_referer" "$http_user_agent" '
        #                         'Cache: $upstream_cache_status';

        # access_log /var/log/nginx/access.log cache_status;
    }
}