如何利用Nginx_geo模块实现CDN调度

geo指令
语法: geo [$address] $variable { ... }
默许值: —
配备段: http

正在/usr/local/nginx/conf/nginx.conf文件内列入下列铺排
geo $geo {
    ranges;          #利用以所在段的内容界说地点，那个参数必需搁正在尾位   
    default dn;
    include ip_geo.conf;
  }

    upstream wuhan.server {
      server   19两.168.155.98:8081;
    }

    upstream shanghai.server {
      server   19两.168.155.98:808两;
    }

    upstream shenzhen.server {
      server   19二.168.155.98:8083;
    }

    upstream dn.server {
      server   19两.168.155.98:8084;
    }

 server {
    listen    80;
    server_name 19两.168.155.98 jiaoyu.media.cloudp.cc;
      root   html;
      index index.html index.htm;
    location ~* \.xml$ {
      root /data/video;
    }
    location / {
      proxy_redirect off;
      proxy_set_header host $host;
      proxy_set_header x-real-ip $remote_addr;
      proxy_set_header x-forwarded-for 
      $proxy_add_x_forwarded_for;
      proxy_pass http://$geo.server$request_uri;
    }
  }

  server {
    listen 8081;
    server_name 19两.168.155.98;
    location / {
      rewrite ^ $scheme://19两.168.155.106$request_uri必修 permanent;
    }
  }

  server {
    listen 808两;
    server_name 19两.168.155.98;
    location / {
        rewrite ^ $scheme://19两.168.155.107$request_uri必修 permanent;
    }
  }

server {
    listen 8083;
    server_name 19两.168.155.98;
    location / {
        rewrite ^ $scheme://19二.168.155.109$request_uri选修 permanent;
    }
  }

  server {
    listen 8084;
    server_name 19两.168.155.98;
    location / {
        rewrite ^ $scheme://jiaoyu.dn.cloudp.cc$request_uri必修 permanent;
    }
}

vim /usr/local/nginx/conf/ip_geo.conf

19二.168.1两8.6-19两.168.1二8.10 wuhan;
19两.168.1二8.11-19二.168.1二8.15 shanghai;
19两.168.1两8.16-19二.168.1二8.两0 shenzhen;