nginx_cdn配置

 upstream backend {
         server 1.1.1.1;
         keepalive 128;
         }

         proxy_temp_path  /dev/shm;
         proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=cache_one:500m inactive=10d max_size=1024m;

         limit_conn_zone $binary_remote_addr zone=addr:20m;
         limit_req_zone $binary_remote_addr zone=req_addr:20m rate=200r/s;

 server{
         listen                          80 ;
         server_name                     www.iquduo.com;
         access_log                      logs/e.cn.access.log main;
         error_log                       logs/e.cn.error.log;

         location ~* \.(aac|mp3|mp4|jpeg|jpg|png|gif|js|htm|html|css|avi|mpg|rar|wmv|doc|docx|mov|flv|pdf|edb|ppt|pptx)$ {
                 root                    /data/nginx/cache;
                 proxy_cache_use_stale   error timeout http_500 http_502 http_503 http_504;
                 proxy_cache             cache_one;
                 proxy_cache_valid       200 206 304 12h;
                 proxy_cache_revalidate  on;

                 add_header              X-Cache $upstream_cache_status;
                 add_header              Via     "CDN";
                 #limit_rate_after       4096k;
                 #limit_rate             2048k;
                 #limit_req              zone=req_addr burst=300 nodelay;
                 #limit_req_status       503;

                 #proxy_limit_rate       256000; #64000 = 1Mb per connections

 proxy_cache_key         $scheme$proxy_host$uri;
                 proxy_cache_lock        on;
                 proxy_cache_lock_timeout 10s;
                 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_pass              http://backend;
                 proxy_http_version      1.1;
                 proxy_set_header        Connection "";
                 }

         location ~ / {
                 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_pass              http://backend;
                 proxy_http_version      1.1;
                 proxy_set_header        Connection "";
                 }
 }