CentOS Nginx反向代理 + Apache配置

Nginx处理静态内容是把好手，Apache虽然占用内存多了点，性能上稍逊，但一直比较稳健。倒是Nginx的FastCGI有时候会出现502 Bad Gateway错误。一个可选的方法是Nginx做前端代理，处理静态内容，动态请求统统转发给后端Apache。Nginx Server配置如下（测试环境）：

server {
   listen 80;
   server_name digicake.com;

   location / {
      root /home/www/digicake.com/www;
      index index.php index.html;

      # Nginx找不到文件时，转发请求给后端Apache
      error_page 404 @proxy;

      # css, js 静态文件设置有效期1天
      location ~ .*\.(js|css)$ {
         access_log off;
         expires      1d;
      }

      # 图片设置有效期3天
      location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$ {
         access_log off;
         expires      3d;
      }
   }

   # 动态文件.php请求转发给后端Apache
   location ~ \.php$ {
     #proxy_redirect off;
     #proxy_pass_header Set-Cookie;
     #proxy_set_header Cookie $http_cookie;

      # 传递真实IP到后端
      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;

      proxy_pass   http://127.0.0.1:8080;
   }

   location @proxy {
      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;

      proxy_pass http://127.0.0.1:8080;
   }
}

环境：CentOS6.0-64bit，Nginx 1.0.8，Apache 2.2.21，PHP 5.3.8。其中Nginx全面接管80端口，Apache退居二线，监听8080端口。