當(dāng)用nginx做負(fù)載均衡的時(shí)候，nginx的配置文件如下：

      upstream server_pools {           server 10.0.0.7:80  weight=1;           server 10.0.0.8:80  weight=1;  

當(dāng)客戶端訪問時(shí)出現(xiàn)報(bào)錯(cuò)如下：

  [root@lb02 ~]# curl  www.hahaetiantian.org    

Bad Request

Your browser sent a request that this server could not understand.

Additionally, a 400 Bad Request error was encountered while trying to use an ErrorDocument to handle the request.

[root@lb02 ~]# curl www.hahaetiantian.org www

查看日志報(bào)錯(cuò)并不能找到原因，但是根據(jù)400報(bào)錯(cuò)以及對(duì)http協(xié)議的原理了解得知是因?yàn)檎?qǐng)求頭的原因，最后在網(wǎng)上找到解決辦法，原因是因?yàn)閡pstream后面的名稱有下劃線使得代理無法識(shí)別，修改如下：

      upstream server-pools {           server 10.0.0.7:80  weight=1;           server 10.0.0.8:80  weight=1;

然后再次訪問結(jié)果如下：

  [root@lb02 ~]# curl  www.etiantian.org  apache www  [root@lb02 ~]# curl  www.etiantian.org  www