实验环境
主机名 IP 版本
haproxy 192.168.14.210 1.5.18
web1 192.168.14.211 nginx/1.12.2
web2 192.168.14.212 nginx/1.12.2一、haproxy
1、关闭防火墙和selinux
[root@haproxy ~]# systemctl stop firewalld
[root@haproxy ~]# systemctl disable firewalld
[root@haproxy ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config2、yum安装haproxy
[root@haproxy ~]# yum install -y haproxy
[root@haproxy ~]# systemctl start haproxy
[root@haproxy ~]# systemctl enable haproxy3、开启haproxy日志记录
#查看proxy配置文件，提示添加-r和日志保存路径
[root@haproxy ~]# vim /etc/haproxy/haproxy.cfg
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
#添加-r
[root@haproxy ~]# vim /etc/sysconfig/rsyslog
# Options for rsyslogd
# Syslogd options are deprecated since rsyslog v3.
# If you want to use them, switch to compatibility mode 2 by "-c 2"
# See rsyslogd(8) for more details
SYSLOGD_OPTIONS="-r"
[root@haproxy ~]# vim /etc/rsyslog.conf
#由于haproxy的日志是用udp传输的，所以要启用rsyslog的udp监听
# Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514
#启用级别为local2的设备，并将该设备的所有级别的日志全部输出到/var/log/haproxy.log
local2.* /var/log/haproxy.log
#haproxy日志文件不会自动创建，需要手动添加
[root@haproxy ~]# touch /var/log/haproxy.log
#重启服务
[root@haproxy ~]# systemctl restart rsyslog
4、修改配置文件（直接复制，修改后端主机IP）
[root@haproxy ~]# cat /etc/haproxy/haproxy.cfg
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
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 stats
mode http
bind 0.0.0.0:1080 #图形化管理页面端口
stats enable
stats hide-version
stats uri /haproxyadmin?stats #图形化管理页面
stats realm Haproxy\ Statistics
stats auth admin:admin #管理用户名和密码
stats admin if TRUE
frontend http-in
bind *:80
mode http
log global
option httpclose
option logasap
option dontlognull
capture request header Host len 20
capture request header Referer len 60
default_backend servers
frontend healthcheck
bind :1099
mode http
option httpclose
option forwardfor
default_backend servers
backend servers #后端主机组
balance roundrobin #负载
server websrv1 192.168.14.211:80 check maxconn 2000
server websrv2 192.168.14.212:80 check maxconn 2000二、web1
#关闭防火墙和selinux
[root@web1 ~]# systemctl stop firewalld
[root@web1 ~]# systemctl disable firewalld
[root@web1 ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
#安装nginx并启动
[root@web1 ~]# yum install -y nginx
[root@web1 ~]# systemctl start nginx
[root@web1 ~]# systemctl enable nginx
#修改主页面
[root@web1 ~]# echo "nginx web1" > /usr/share/nginx/html/index.html三、web2
#关闭防火墙和selinux
[root@web2 ~]# systemctl stop firewalld
[root@web2 ~]# systemctl disable firewalld
[root@web2 ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
#安装nginx并启动
[root@web2 ~]# yum install -y nginx
[root@web2 ~]# systemctl start nginx
[root@web2 ~]# systemctl enable nginx
#修改主页面
[root@web1 ~]# echo "nginx web2" > /usr/share/nginx/html/index.html四、客户端
1、访问haproxy
[root@client ~]# curl http://192.168.14.210
nginx web1
[root@client ~]# curl http://192.168.14.210
nginx web2
[root@client ~]# curl http://192.168.14.210
nginx web12、管理页面192.168.14.210:1080/haproxyadmin?stats
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