nginx.conf

events {
    worker_connections 2048;
    use epoll;
    multi_accept on;
}

http {
    access_log off;
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;

    keepalive_timeout 65;
    keepalive_requests 10000;

    reset_timedout_connection on;

    upstream api {
        server api01:8080;
        server api02:8080;
        keepalive 500;
    }

    server {
        listen 9999;

        location / {
            proxy_pass http://api;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_buffers 16 4k;
            proxy_buffer_size 2k;
            proxy_read_timeout 60s;
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
        }
    }
}