tnb0/nginx/nginx.conf

user root root;
worker_processes 1;
worker_rlimit_nofile 20000;
error_log  /var/log/nginx/error.log notice;

events {
    use epoll;
    worker_connections 20000;
    multi_accept on;
}

http {
    include mime.types;
    default_type application/octet-stream;

    log_format main
	    	 '{"time_iso8601":"$time_iso8601",'
                 '"remote_addr":"$remote_addr",'
                 '"request":"$request",'
                 '"status":$status,'
                 '"request_method": "$request_method",'
                 '"body_bytes_sent":$body_bytes_sent,'
                 '"request_time":$request_time,'
                 '"upstream_response_time":$upstream_response_time,'
                 '"upstream_addr":"$upstream_addr",'
                 '"host":"$host",'
                 '"url":"$uri",'
                 '"http_x_forwarded_for":"$http_x_forwarded_for",'
                 '"http_referer":"$http_referer",'
                 '"http_user_agent":"$http_user_agent"}';

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    server_tokens off;
    keepalive_timeout 60;
    client_max_body_size 6120m;
    proxy_connect_timeout 600;
    proxy_send_timeout 600;
    proxy_read_timeout 600;
    proxy_buffer_size 16k; 
    proxy_buffers 4 64k; 
    proxy_busy_buffers_size 128k; 
    proxy_temp_file_write_size 128k;


    map $http_connection $connection_upgrade {
        "~*Upgrade" $http_connection;
        default keep-alive;
    }

    include conf.d/*.conf;
}