基于URL的HAProxy负载均衡设置

例子包括ACL的url_beg。 url_beg提交URL中使用的字符串相匹配。

使用URL /blog（cnblog/api）所有请求重定向到WEB服务器的6200端口。所有其他请求将重定向到服务器的6100端口，根据负载均衡使用的算法。 下面是使用url_beg ACL的一个简单的例子：

global
	#log /dev/log	local6
	log 192.168.1.110:51405 local7
	maxconn 100000
	uid 99
	gid 99
	daemon
	stats   socket /var/run/haproxy.stat mode 644
	quiet

defaults
	log	global
	mode	http
	option	httplog
	option	dontlognull
	option	httpclose
	option	forceclose
	option	forwardfor
	option	redispatch
	option	allbackups
	option	http-server-close
	option	log-health-checks
	retries	3
	balance	roundrobin
	maxconn	20000
	timeout connect	10000
	timeout client	50000
	timeout server	50000
	timeout	check	10000

listen haproxy-statistics
	bind	0.0.0.0:11180
	stats	enable
	stats	admin	if TRUE
	stats	refresh	30s
	stats	hide-version
	stats	uri	/haproxy-status
	stats	realm	Haproxy statistics
	stats	auth	deed:6ddu7

listen haproxy-monitoring
	bind	0.0.0.0:11190
	mode	health
	monitor-net	192.168.1.0/24
	no option	forceclose
	no option	httpclose
	no option	http-server-close
frontend api.cnblog.cn:6200
  bind *:6200
  mode http
  acl api.cnblog.cn       url_beg   /api
  use_backend api.cnblog.cn     if api.cnblog.cn
  default_backend  api_cnblog.cn
backend api.cnblog.cn
  mode http
  balance roundrobin
  #cookie SERVERID insert indirect nocache
  #option  httpchk GET /alived.gif  HTTP/1.1
Host: api.cnblog.cn
  server  tomcat_10.211           192.168.1.211:6200     check inter 10000 rise 2 fall 3
  server  tomcat_10.212           192.168.1.212:6200     check inter 10000 rise 2 fall 3
backend api_cnblog.cn
  mode http
  balance roundrobin
  #cookie SERVERID insert indirect nocache
  #option  httpchk GET /alived.gif  HTTP/1.1
Host: api.cnblog.cn
  server  tomcat_10.211           192.168.1.211:6100     check inter 10000 rise 2 fall 3
  server  tomcat_10.212           192.168.1.212:6100     check inter 10000 rise 2 fall 3