Haproxy的安装和配置
Haproxy的安装和配置Desktop1:172.25.68.1
Desktop2:172.25.68.2
Desktop3:172.25.68.3
真机:172.25.68.250
在desktop1和desktop2上
yum install haproxy -y
cd /etc/haproxy
/etc/init.d/nginx stop
/etc/init.d/haproxy start
编辑vim haproxy.cfg
listen westos *:80
balance roundrobin
server web1 172.25.68.1:80 check
server web2 172.25.68.2:80 check
/etc/init.d/haproxy reload
desktop3:
yum install httpd
编辑 vim /var/www/html/index.html
Desktop3.example.com
/etc/init.d/httpd start
测试：输入172.25.68.250:80
在desktop1上修改
编辑 vim haproxy.cfg
listen admin 172.25.68.250:8080
stats enable
stats uri /status
stats auth admin:westos
stats refresh 5s
listen westos 172.25.68.250:80
balance roundrobin
server web1 172.25.68.1:80 check
server web2 172.25.68.2:80 check
/etc/init.d/haproxy reload
测试： 172.25.68.250:8080/status 任意关闭开启desktop1和desktop2的http服务 注意观察颜色变化
动静分离：
desktop1:
编辑vim /etc/haproxy/haproxy.cfg
listen admin 172.25.68.250:8080
stats enable
stats uri /status
stats auth admin:westos
stats refresh 5s
frontendwestos 172.25.68.250:80
acl url_static path_beg -i/images
acl url_static path_end -i .jpg .gif .png
use_backend static if url_static
default_backend app
backend static##静态
balance roundrobin
server web1 172.25.68.2:80 check
backend app##动态
balance roundrobin
server web2 172.25.68.1:80 check
/etc/init.d/haproxy reload
Desktop2
cd /var/www/html
mkdir images
cd images
拷贝OSI.gif，redhat.jpg到该目录
测试：172.25.68.250/images/redhat.jpg 或者 172.25.68.250/images/OSI.gif
访问权限的设置
desktop1:
编辑vim /etc/haproxy/haproxy.cfg
listen admin 172.25.68.250:8080
stats enable
stats uri /status
stats auth admin:westos
stats refresh 5s
frontendwestos 172.25.68.250:80
acl url_static path_beg -i/images
acl url_static path_end -i .jpg .gif .png
acl badhost src 172.25.68.2
block if badhost
use_backend static if url_static
default_backend app
/etc/init.d/haproxy reload
测试: 172.25.68.250 报错403
修改默认端口：编辑vim /etc/httpd/conf/httpd.conf
135 #Listen 12.34.56.78:80
136 Listen 8000
编辑vim /var/www/html
维护中，表闹........
/etc/init.d/httpd start
Desktop1:
编辑vim /etc/haproxy/haproxy.cfg
listen admin 172.25.68.250:8080
stats enable
stats uri /status
stats auth admin:westos
stats refresh 5s
frontendwestos 172.25.68.250:80
acl url_static path_beg -i/images
acl url_static path_end -i .jpg .gif .png
acl badhost src 172.25.68.2
# block if badhost
errorloc 403 http://172.25.68.2:8000
use_backend static if url_static
default_backend app
backend static
balance roundrobin
server web1 172.25.68.2:80 check
backend app
balance roundrobin
server web2 172.25.68.1:80 check
server local 172.25.68.250:8000 backup
/etc/init.d/haproxy reload
测试:172.25.68.250
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