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

frontend  westos 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

frontend  westos 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

frontend  westos 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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Haproxy的安装和配置