haproxy hdr_beg 配置

v-dev-app01:/root# ping www.zjdev.com
PING www.zjdev.com (192.168.32.16) 56(84) bytes of data.
64 bytes from 192.168.32.16: icmp_seq=1 ttl=64 time=0.238 ms

  acl             zjdev_6_req             hdr_beg(host)           -i                         www.zjdev.com
  acl             url_static_zjdev        path_end                                            .html .gif .png .jpg .css .js
  use_backend     appserver_8001          if                      zjdev_6_req          url_static_zjdev

匹配域名www.zjdev.com 且匹配.html .gif .png .jpg .css .js结尾

  acl             zjtest8_req             hdr_beg(host)           -i                         www.zjtest8.com
  use_backend     zjtest8_8001          if                      zjtest8_req

v-dev-app01:/root# curl http://www.zjdev.com/
test page from scan!

v-dev-app01:/root# ping www.zjtest8.com
PING www.zjtest8.com (192.168.32.16) 56(84) bytes of data.
64 bytes from 192.168.32.16: icmp_seq=1 ttl=64 time=0.175 ms
64 bytes from 192.168.32.16: icmp_seq=2 ttl=64 time=0.216 ms

v-dev-app01:/root# curl http://www.zjtest8.com
test  jj 20160823
v-dev-app01:/root# curl http://www.zjdev.com/
test page from scan!
v-dev-app01:/root# 

hdr_beg([<name>[,<occ>]]) : prefix match  前缀匹配:

acl host_www    hdr_beg(host) -i   www

acl host_static hdr_beg(host) -i img. video. download. ftp.

5.1.7 hdr_beg <string>
用于测试请求报文的指定首部的开头部分是否符合<string>指定的模式。例如，下面的例子用记测试请求是否为提供静态内容的主机img、video、download或ftp。

acl host_static hdr_beg(host) -i img. video. download. ftp.

 acl is_a hdr_beg(host) -i www.abc.test1  #判断域名是不是www.abc.test1,是则给与a服务器集群服务
        acl is_b hdr_beg(host) -i www.abc.test2  #判断域名是不是www.abc.test2,是则给与a服务器集群服务  

        use_backend a_server if is_a
        use_backend b_server if is_b