安装haproxy

安装依赖

yum install -y gcc pcre pcre-devel openssl openssl-devel

创建依赖账号，并禁止账号登录

useradd -M -s /sbin/nologin -u 1000 haproxy

编译安装haproxy

cd /usr/local/src/
wget https://www.haproxy.org/download/1.7/src/haproxy-1.7.11.tar.gz
tar xf haproxy-1.7.11.tar.gz
cd haproxy-1.7.11/
make TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1  PREFIX=/usr/local/haproxy
make install PREFIX=/usr/local/haproxy
/usr/local/haproxy/sbin/haproxy -v

复制haproxy启动脚本到启动目录下

cp /usr/local/src/haproxy-1.7.11/haproxy /usr/sbin/
cp /usr/local/src/haproxy-1.7.11/haproxy-systemd-wrapper /usr/sbin

配置成systemctl可以管理

vim /usr/lib/systemd/system/haproxy.service

[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target

[Service]
EnvironmentFile=/etc/sysconfig/haproxy
ExecStart=/usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid $OPTIONS
ExecReload=/bin/kill -USR2 $MAINPID

[Install]
WantedBy=multi-user.target

编辑配置文件

cat /etc/sysconfig/haproxy

# Add extra options to the haproxy daemon here. This can be useful for
# specifying multiple configuration files with multiple -f options.
# See haproxy(1) for a complete list of options.
OPTIONS=""　

编辑主配置文件

mkdir /etc/haproxy/

vim /etc/haproxy/haproxy.cfg

global
maxconn 100000
chroot /usr/local/haproxy
uid 1000
gid 1000
daemon
nbproc 1
pidfile /usr/local/haproxy/run/haproxy.pid
log 127.0.0.1 local6 info

defaults
option http-keep-alive
maxconn 100000
mode http
timeout connect 300000ms
timeout client  300000ms
timeout server  300000ms

listen stats
 mode http
 bind 0.0.0.0:8888   # 访问的端口
 stats enable
 log global
 stats uri     /haproxy-status   #状态地址
 stats auth    haproxy:123456    #登录账号和密码
#frontend web_port
frontend frontend_www_example_com
    bind 10.0.0.80:80
    mode http
    option httplog
    log global
    default_backend backend_www_example_com

backend backend_www_example_com
    option forwardfor header X-REAL-IP
    option httpchk HEAD / HTTP/1.0
    balance source
    server web-node1  10.0.0.80:8080 check inter 2000 rise 30 fall 15
    server web-node2  10.0.0.81:8080 check inter 2000 rise 30 fall 15

创建PID文件存放路径

mkdir /usr/local/haproxy/run/

启动服务

systemctl enable haproxy.service
systemctl start haproxy.service

修改日志存放位置  vim /etc/rsyslog.conf

[root@node-1 haproxy-1.7.11]# sed -n "15,21p" /etc/rsyslog.conf
$ModLoad imudp
$UDPServerRun 514
# Provides TCP syslog reception
$ModLoad imtcp
$InputTCPServerRun 514
local6.*     /var/log/haproxy/haproxy.log
local6.*     @@10.0.0.80:5160
[root@node-1 haproxy-1.7.11]#

创建日志存放位置并授权haproxy

mkdir /var/log/haproxy
chown -R haproxy.haproxy /var/log/haproxy

重启服务生效

systemctl restart rsyslog
systemctl restart haproxy.service