前提：选择yum安装方式安装，目前官方已发布稳定版至2.0，base仓库中的版本为1.5，就做四层端口转发，无所谓
一、安装haproxy
[root@centos-01 ~]# yum install haproxy
二、管理服务
2.1配置端口转发(端口默认范围：55535-56535)
[root@centos-01 ~]# cd /etc/haproxy/
[root@centos-01 haproxy]# cp haproxy.cfg haproxy.cfg.bak
[root@centos-01 haproxy]# vim haproxy.cfg
添加tcp代理
global
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
stats socket /var/lib/haproxy/stats
defaults
mode tcp
option dontlognull
option nolinger
retries 3
option redispatch
fullconn 4096
timeout connect 10s
timeout client 1m
timeout server 1m
listen FilesUpdate_55535 0.0.0.0:55535
server app1 192.168.0.146:3306
listen FilesUpdate_55536 0.0.0.0:55536
server app1 192.168.0.134:3306
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
listen app-stats 0.0.0.0:80
stats refresh 15s
stats uri /stats
stats realm haproxy MaraDBServer
stats auth admin:admin
stats hide-version
备注：为了方便查看将app1 替换为ip+端口模式方式进行展示
三、启动haproxy
[root@centos-01 haproxy]# systemctl start haproxy.service
[root@centos-01 haproxy]# systemctl enable haproxy.service
四、添加防火墙规则
[root@centos-01 haproxy]# firewall-cmd –zone=public –add-port=55535-56535/tcp –permanent
[root@centos-01 haproxy]# firewall-cmd –zone=public –add-port=80/tcp –permanent
[root@centos-01 haproxy]# firewall-cmd –reload
五、访问
登录http://192.168.5.250/stats admin/admin
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