haproxy.cfg

gistfile1.txt

defaults
   timeout connect 5s
   timeout client 1m
   timeout server 1m

frontend http_front
   bind *:80
   mode http
   acl app1 path_beg -i /nginx
   acl app2 path_beg -i /apache
   default_backend http_back
   use_backend srvs_nginx if app1
   use_backend srvs_apache if app2

######redirect mode######

#backend srvs_nginx
#   mode http
#   option forwardfor
#   redirect location http://localhost:82
#
#backend srvs_apache
#   mode http 
#   option forwardfor
#   redirect location http://localhost:81
#

######proxy mode######
backend srvs_nginx
  mode http
  option forwardfor
  http-request set-uri %[url,regsub(^/nginx,/,)] 
  #if { path_beg /nginx }
  server server1 nginx:80

backend srvs_apache
  mode http
  option forwardfor
  http-request set-uri %[url,regsub(^/apache,/,)] 
  #if { path_beg /apache }
  server server2 apache:80

backend http_back
   #balance roundrobin
   balance leastconn
   mode http
   option forwardfor
   server server1 nginx:80
   server server2 apache:80