使用nginx配置兩臺伺服器的均衡負載後，瀏覽器控制檯出現報錯： 504Gateway Time-out。

一般這個錯誤是nginx配置不合理造成的，可以在http中增加如下配置進行改善：

	fastcgi_connect_timeout 300; 
    fastcgi_send_timeout 300; 
    fastcgi_read_timeout 300; 
    fastcgi_buffer_size 64k; 
    fastcgi_buffers 4 64k; 
    fastcgi_busy_buffers_size 128k; 
    fastcgi_temp_file_write_size 128k;
 

並且修改連線時間（請求時間比較長，建議改此處）：

     proxy_connect_timeout       18000;
     proxy_read_timeout          18000;
     proxy_send_timeout          18000; 

下面是我的nginx配置：

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    client_max_body_size 128m;
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        off;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;
	
	fastcgi_connect_timeout 300; 
    fastcgi_send_timeout 300; 
    fastcgi_read_timeout 300; 
    fastcgi_buffer_size 64k; 
    fastcgi_buffers 4 64k; 
    fastcgi_busy_buffers_size 128k; 
    fastcgi_temp_file_write_size 128k;

    #gzip  on;

    upstream backend{
	#ip_hash;
	
	server 49.x.xx.xx4:8080 weight=5 max_fails=2 fail_timeout=600s; 
	server 114.xxx.xxx.x6:8080 weight=5 max_fails=2 fail_timeout=600s;

        #server localhost:8081; 
    }  
	
    server {
        listen       80;
        server_name  114.xxx.xxx.x6;
        location / {

            proxy_buffering off;

            proxy_pass http://backend;
			#root html;
	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_connect_timeout       18000;
    	proxy_read_timeout          18000;
    	proxy_send_timeout          18000; 

        }



    }

    


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}