SocketIO + Reverse Proxy + Load Balancing NGINX configuration file

socket-proxylb-nginx.conf

upstream nodejs {
        ip_hash;
        server localhost:5000;
        server localhost:5001;
    }

    server {
        listen 80;
        listen [::]:80;
        server_name SERVER_IP;
        root /home/ryan;

        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        location /socket.io/ {
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_pass http://nodejs/socket.io/;
        }

        location / {
                proxy_pass http://nodejs/;
        }
    }