Haproxy配置之URL重写,支持websocket

配置文件位置: /etc/haproxy/haproxy.cfg

关键点: Reqrep 正则重写URL

解决的问题场景: 负载均衡机器出口端口统一为80,代理后台API,Docs,Websocket,Web页面四个服务,服务端口不一。

最终实现结果:

10.0.0.3/api  -->  10.0.0.1: --> API服务

10.0.0.3  -->  10.0.0.2: --> Web页面

10.0.0.3/ws --> 10.0.0.1: --> Websocket服务

10.0.0.3/docs  --> 10.0.0.2: --> Docs文档

配置详情:

 Frontend App *:
        acl uri_api             path_beg    /api/
        acl uri_web           path_beg    /
        acl uri_docs          path_beg    /docs/
        acl uri_socket       hdr(Upgrade) -i Websocket
        acl uri_socket       hdr_beg(Host) -i ws

     Use_backend api         if uri_api
     Use_backend socket   if uri_socket
     Use_backend web       if uri_web
     Use_backend docs      if uri_docs
12

13 Backend api

14          balance roundrobin
15          reqrep   ^([^\ ]*\ /)api[/]?(*)  \1\2
16          server   server1 10.0.0.1:8080 check
17
18 Backend socket
19          balance roundrobin
20          timeout queue 1h
21          timeout server 1h
22          timeout connect 1h
23          server   server1 10.0.0.1:8443 check
24
25 Backend web
26          balance roundrobin
27          server   server1 10.0.0.2:8080 check
28
29 Backend docs
30          balance roundrobin
31          server   server1 10.0.0.2:9000 check