1、安装必要的包
yum install gcc gcc-c++ glibc glibc-devel pcre pcre-devel openssl openssl-devel systemd-devel net-tools vim iotop bc zip unzip zlib-devel lrzsz tree screen lsof tcpdump wget ntpdate
2、关闭selinux 和防火墙：
sed -i '/SELINUX/s/enforcing/disabled/' /etc/sysconfig/selinux
systemctl status firewalld
systemctl stop firewalld
systemctl disable firewalld
3、tar xf haproxy-1.8.13.tar.gz -C /usr/local/src/
cd haproxy-1.8.13;
注释：USE_CPU_AFFINITY=1 为开启haproxy 进程与cpu核心绑定，
USE_SYSTEMD=1 为支持使用 -Ws systemd-aware master-worker 模式，启动haproxy
make ARCH=x86_64 TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 PREFIX=/usr/local/haproxy
mkde install PREFIX=/usr/local/haproxy
版本验证
[root@node03 haproxy-1.8.13]# /usr/local/haproxy/sbin/haproxy -v
HA-Proxy version 1.8.13 2018/07/30
Copyright 2000-2018 Willy Tarreau <willy@haproxy.org
4、cp haproxy /usr/sbin
vim /usr/lib/systemd/system/haproxy.service
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target
[Service]
ExecStartPre=/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -f /etc/haproxy/conf -c -q
ExecStart=/usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -f /etc/haproxy/conf -p /run/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID
[Install]
WantedBy=multi-user.target
5、vim /etc/haproxy/haproxy.cfg
global
maxconn 100000
chroot /usr/local/haproxy
uid 99
gid 99
daemon
nbproc 1
stats socket /usr/local/haproxy/stats mode 600 level admin
log 127.0.0.1 local2 info
defaults
#option http-keep-alive
maxconn 100000
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
listen stats
mode http
bind 0.0.0.0:9009
stats enable
stats uri /haproxy-status
stats auth haadmin:123456
6、vim /etc/haproxy/conf/tomcat.cfg
listen web_port
bind 192.168.100.100:80
mode http
log global
server 192.168.100.30 192.168.100.30:8080 check inter 3000 fall 2 rise 5
server 192.168.100.40 192.168.100.40:8080 check inter 3000 fall 2 rise 5
7、systemctl start haproxy
8、验证：
http://192.168.100.30:9009/haproxy-status
