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先修改一下，Web服务器记录日志的格式。
- [root@web2 ~]# vim /etc/httpd/conf/httpd.conf
- LogFormat "%{X-Real-IP}i %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"" combined
- [root@web2 ~]# service httpd restart
停止 httpd： [确定]
正在启动 httpd： [确定]
接着，，再访问多次，继续查看日志。
- [root@web2 ~]# tail /var/log/httpd/access_log
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:28 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:29 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
- 192.168.1.208 - - [04/Sep/2013:09:50:29 +0800] "GET / HTTP/1.0" 200 23 "-" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"
注，大家可以看到，两台服务器日志都记录是192.168.1.208访问的日志，也说明了负载均衡配置成功。
9.配置nginx进行健康状态检查
max_fails，允许请求失败的次数，默认为1。当超过最大次数时，返回proxy_next_upstream 模块定义的错误。 （编辑：晋中站长网）
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