使用nginx配置完项目后，报nginx 504 Gateway Time-out，一般这个错误，是nginx配置不合理造成的。

可以通过在http中增加如下配置，进行改善：

    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; 

并且修改连接时间（请求时间比较长，建议改此处）：

    proxy_connect_timeout   18000;   #连接时间为半小时
    proxy_send_timeout      18000;   
    proxy_read_timeout      18000;    

贴出我的nginx.con配置文件

#user  nobody;
worker_processes  4;

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 {
    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        on;
    #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;

    client_header_buffer_size   32k;
    #配置两台tomcat的负载均衡
    upstream mysite{  
      ip_hash;
      server 172.29.xx.x9:8280;  
      server 172.29.xx.x0:8280;  
    }  

	
        
    server {
        listen       80;
        server_name  172.29.xx.xx;

        charset utf-8;
        #charset koi8-r;

        access_log  logs/host.access.log  main;
        
        location /zyk {
          proxy_pass http://mysite; #配置两台tomcat的负载均衡
	  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_send_timeout      18000;  
          proxy_read_timeout      18000;  
        }
        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # 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;
    #    }
    #}

}