frontend webserver
bind 0.0.0.0:80 ＃在本机的所有接口监听访问 80 端口的请求
MySQL集群在HAproxy之后运行，HAproxy对进来请求进行负载均衡，对外只暴露一个IP地址。
根据用户访问内容实现动静分离：
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frontend http-
in
bind *:80
mode http
log global
option httpclose
acl url_static path_beg -i /
static
/images /javascript /stylesheets
acl url_static path_end -i .jpg .jpeg .gif .png .css .js
use_backend static_servers
if
url_static
default_backend dynamic_servers
backend static_servers
balance roundrobin
server imgsrv1 172.18.64.7:80 check maxconn 6000
server imgsrv2 172.18.64.107:80 check maxconn 6000
backend dynamic_servers
balance source
server websrv1 172.18.64.17:80 check maxconn 1000
server websrv2 172.18.64.106:80 check maxconn 1000
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http://www.cnblogs.com/heiye123/articles/7928292.html