Web2:

先修改一下，Web服务器记录日志的格式。

[root@web2 ~]# vim /etc/httpd/conf/httpd.confLogFormat "%{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_log192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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)"192.168.18.138 - - [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192.168.18.138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。 fail_timeout，在经历了max_fails次失败后，暂停服务的时间。max_fails可以和fail_timeout一起使用，进行健康状态检查。

[root@nginx ~]# vim /etc/nginx/nginx.confupstream webservers {    server 192.168.18.201 weight=1 max_fails=2 fail_timeout=2;    server 192.168.18.202 weight=1 max_fails=2 fail_timeout=2;  }

10.重新加载一下配置文件

[root@nginx ~]# service nginx reloadnginx: the configuration file /etc/nginx/nginx.conf syntax is oknginx: configuration file /etc/nginx/nginx.conf test is successful重新载入 nginx：                      [确定]

11.停止服务器并测试

先停止Web1，进行测试。[root@web1 ~]# service httpd stop停止 httpd：                        [确定]