Haproxy根目录：F:\SysWork\openSource\haproxy\haproxy1.5.12
配置文件haproxy.cfg如下：
global
log 127.0.0.1 local0
# maxconn 4096
chroot F:\SysWork\openSource\haproxy\haproxy1.5.12
# uid 99
# gid 99
# daemon
nbproc 1
pidfile F:\SysWork\openSource\haproxy\haproxy1.5.12\haproxy.pid
debug quiet
defaults
log 127.0.0.1 local3
mode http
option httplog
option httpclose
option dontlognull
option forwardfor
option redispatch
retries 3
maxconn 8192
balance roundrobin
timeout connect 50000
timeout client 50000
timeout server 50000
timeout check 20000
listen httpweb :8100
mode http
balance roundrobin
option httpclose
option forwardfor
option httpchk GET /index.html #心跳检测的文件
server httpweb1 localhost:9200 cookie 1 weight 5 check inter 2000 rise 2 fall 3
server httpweb2 localhost:9300 cookie 2 weight 3 check inter 2000 rise 2 fall 3
listen httpservice :8200
mode http
balance roundrobin
option httpclose
option forwardfor
option httpchk GET /index.html #心跳检测的文件
server httpservice1 localhost:9200 cookie 3 weight 5 check inter 2000 rise 2 fall 3
server httpservice2 localhost:9300 cookie 4 weight 3 check inter 2000 rise 2 fall 3
listen tcpservice
bind 0.0.0.0:8400
mode tcp
server tcpservice1 localhost:20880 cookie 5 weight 3 check inter 2000 rise 2 fall 3
listen status 127.0.0.1:8300
stats enable
stats uri /status
stats auth admin:123456
stats realm (Haproxy\ statistic)
启动命令：
F:\SysWork\openSource\haproxy\haproxy1.5.12>haproxy.exe -f haproxy.cfg
[WARNING] 240/200829 (11260) : parsing [haproxy.cfg:14] : 'option httplog' not usable with proxy 'tcpservice' (needs 'mo
de http'). Falling back to 'option tcplog'.
[WARNING] 240/200829 (11260) : config : 'option forwardfor' ignored for proxy 'tcpservice' as it requires HTTP mode.
[WARNING] 240/200829 (11260) : config : proxy 'tcpservice' : ignoring cookie for server 'tcpservice1' as HTTP mode is di
sabled.
Available polling systems :
poll : pref=200, test result OK
select : pref=150, test result FAILED
Total: 2 (1 usable), will use poll.
Using poll() as the polling mechanism.
[WARNING] 240/200829 (11260) : [haproxy.main()] Cannot raise FD limit to 4019.
[WARNING] 240/200829 (11260) : [haproxy.main()] FD limit (256) too low for maxconn=2000/maxsock=4019. Please raise 'ulim
it-n' to 4019 or more to avoid any trouble.
[WARNING] 240/200830 (11260) : Server httpweb/httpweb1 is DOWN, reason: Layer4 connection problem, info: "Connection ref
used", check duration: 1000ms. 1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
[WARNING] 240/200831 (11260) : Server httpweb/httpweb2 is DOWN, reason: Layer4 connection problem, info: "Connection ref
used", check duration: 1000ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue.
[ALERT] 240/200831 (11260) : proxy 'httpweb' has no server available!
[WARNING] 240/200831 (11260) : Server httpservice/httpservice1 is DOWN, reason: Layer4 connection problem, info: "Connec
tion refused", check duration: 1000ms. 1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in
queue.
[WARNING] 240/200831 (11260) : Server httpservice/httpservice2 is DOWN, reason: Layer4 connection problem, info: "Connec
tion refused", check duration: 998ms. 0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in
queue.
[ALERT] 240/200831 (11260) : proxy 'httpservice' has no server available!
监控页面地址：http://127.0.0.1:8300/status
现在配置文件除了http代理之外，还有tcp代理，http代理就是简单的代理tomcat的请求。把haproxy的请求分发给多个tomcat，而tcp代理我这里是代理的dubbo请求，dubbo启动起来的时候20880端口，但是我们可以通过这里的8400端口提供请求
我们之前都是通过telnet localhost 20880可以看到dubbo控制台，现在可以通过telnet localhost 8400查看dubbo控制台