环境准备：
192.168.88.25 （client）
192.168.88.26 （HAproxy）
192.168.88.27 （web1）
192.168.88.28 (web2)
192.168.88.29 （php1）
192.168.88.30 (php2)
关闭firewalld,selinux。配置yum源，扩展源epel-release
实验1
一、web1,web2
1、下载httpd服务
yum install httpd -y
2、开启httpd服务并且设置开启自启
systemctl start httpd
systemctl enable httpd
二、haproxy主机
1、安装haproxy（192.168.88.26）
yum install haproxy -y
2、配置HAproxy
vim /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local3 info
maxconn 4096
uid nobody
# uid 99
gid nobody
# gid 99
daemon
nbproc 1
pidfile /run/haproxy.pid
defaults
log global
mode http
maxconn 2048
retries 3
option redispatch
contimeout 5000
clitimeout 50000
srvtimeout 50000
#timeout connect 5000
#timeout client 50000
#timeout server 50000
option abortonclose
stats uri /admin?stats
stats realm Private lands
stats auth admin:password
stats hide-version
frontend http-in
bind 0.0.0.0:80
mode http
log global
option httplog
option httpclose
acl html url_reg -i \.html$
use_backend html-server if html
default_backend html-server
backend html-server
mode http
balance roundrobin
option httpchk GET /index.html
cookie SERVERID insert indirect nocache
server html-A web1:80 weight 1 cookie 3 check inter 2000 rise 2 fall 5
server html-B web2:80 weight 1 cookie 4 check inter 2000 rise 2 fall 5
3、域名解析
vim /etc/hosts
4、开启HAproxy服务
systemctl start haproxy.service
三、客服端（client）
1、安装elinks
yum install -y elinks
2、域名解析
vim /etc/hosts
3、进行访问测试
实验2
一、192.168.88.29(php1)，192.168.88.30(php2)
1、安装httpd,php
yum install httpd php -y
2、修改php服务默认的网页，方便测试观察
192.168.88.29(php1)
echo php1 > /var/www/html/index.php
192.168.88.30(php2)
echo php2 > /var/www/html/index.php
192.168.88.29（php1），192.168.88.30(php2)开启httpd服务,并且设置开启自启
systemctl start httpd.service
systemctl enable httpd.service
二、192.168.88.26（haproxy）
1、域名解释php1,php2
vim /etc/hosts
2、修改配置文件192.168.88.26（HAproxy）
vim /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local3 info
maxconn 4096
uid nobody
# uid 99
gid nobody
# gid 99
daemon
nbproc 1
pidfile /run/haproxy.pid
defaults
log global
mode http
maxconn 2048
retries 3
option redispatch
contimeout 5000
clitimeout 50000
srvtimeout 50000
#timeout connect 5000
#timeout client 50000
#timeout server 50000
option abortonclose
stats uri /admin?stats
stats realm Private lands
stats auth admin:password
stats hide-version
frontend http-in
bind 0.0.0.0:80
mode http
log global
option httplog
option httpclose
acl html url_reg -i \.html$
use_backend html-server if html
acl php url_reg -i \.php$
use_backend php-server if php
default_backend html-server
backend html-server
mode http
balance roundrobin
option httpchk GET /index.html
cookie SERVERID insert indirect nocache
server html-A web1:80 weight 1 cookie 3 check inter 2000 rise 2 fall 5
server html-B web2:80 weight 1 cookie 4 check inter 2000 rise 2 fall 5
backend php-server
mode http
balance roundrobin
option httpchk GET /index.php
cookie SERVERID insert indirect nocache
server php-A php1:80 weight 1 cookie 3 check inter 2000 rise 2 fall 5
server php-B php2:80 weight 1 cookie 4 check inter 2000 rise 2 fall 5
3、重启服务haproxy
systemctl restart haproxy.service
4、192.168.88.25（client）访问192.168.88.26（haproxy）进行测试
三、nginx负载均衡
1、192.168.88.26（haproxy）,把haproxy服务删除，替换成nginx进行负载均衡
yum remove -y haproxy
2、安装nginx服务
yum install -y nginx
3、编辑nginx服务配置文件
vim /etc/nginx/nginx.conf
#http下添加
upstream html {
server web1:80;
server web2:80;
}
upstream php {
server php1:80;
server php2:80;
}
#server下添加
location / {
proxy_pass http://html;
}
location ~ \.php$ {
proxy_pass http://php;
}
4、192.168.88.25（client）访问192.168.88.26（nginx）进行测试
