Haproxy
代理
Server1 172.25.68.10
Server2 172.25.68.11
Real server
Server3 172.25.68.12
Server4 172.25.68.13
真机
172.25.68.150
Evince ##查看pdf文档
[root@server1 haproxy]# vim haproxy.cfg
63 #frontend main *:5000
64 # acl url_static path_beg -i /static /p_w_picpaths /javascript /sty lesheets
65 # acl url_static path_end -i .jpg .gif .png .css .js
66 #
67 # use_backend static if url_static
68 # default_backend app
69 #
70 #---------------------------------------------------------------------
71 # static backend for serving up p_w_picpaths, stylesheets and such
72 #---------------------------------------------------------------------
73 #backend static
74 # balance roundrobin
75 # server static 127.0.0.1:4331 check
76
77 #---------------------------------------------------------------------
78 # round robin balancing between the various backends
79 #---------------------------------------------------------------------
80 #backend app
81 # balance roundrobin
82 # server app1 127.0.0.1:5001 check
83 # server app2 127.0.0.1:5002 check
84 # server app3 127.0.0.1:5003 check
85 # server app4 127.0.0.1:5004 check
86
87 listen westos *:80
88 balance roundrobin
89 server web1 172.25.68.12:80 check
90 server web1 172.25.68.13:80 check
[root@server1 haproxy]# /etc/init.d/haproxy start
Starting haproxy: [ OK ]
[root@server1 haproxy]# netstat -antlp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1436/haproxy
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 905/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 981/master
tcp 0 0 172.25.68.10:22 172.25.68.250:52284 ESTABLISHED 1031/sshd
tcp 0 0 :::22 :::* LISTEN 905/sshd
tcp 0 0 ::1:25 :::* LISTEN 981/master
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
[root@server3 ~]# vim /var/www/html/index.html
Server3.example.com
[root@server3 ~]# /etc/init.d/httpd start
Starting httpd:
[root@server4 ~]# vim /var/www/html/index.html
server4.example.com
[root@server4 ~]# /etc/init.d/httpd start
Starting httpd: [ OK ]
测试
刷新会变成下图
[root@foundation68 Desktop]# curl 172.25.68.10
server3.example.com
[root@foundation68 Desktop]# curl 172.25.68.10
server4.example.com
[root@foundation68 Desktop]# curl 172.25.68.10
server3.example.com
[root@foundation68 Desktop]# curl 172.25.68.10
server4.example.com
[root@foundation68 Desktop]# curl 172.25.68.10
server3.example.com
[root@foundation68 Desktop]# curl 172.25.68.10
server4.example.com
[root@server1 haproxy]# vim haproxy.cfg
87 listen admin *:8080
88 stats enable
89 stats uri /status
90 stats auth admin:westos
91 stats refresh 5s
92
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
[root@server1 haproxy]# vim /etc/rsyslog.conf
13 $ModLoad imudp
14 $UDPServerRun 514
42 *.info;mail.none;authpriv.none;cron.none;local2.none /var/ log/messages
62 local2.* /var/log/haproxy.
log
[root@server1 haproxy]# /etc/init.d/rsyslog restart
Shutting down system logger: [ OK ]
Starting system logger: [ OK ]
[root@server3 conf.d]# /etc/init.d/httpd stop
Stopping httpd: [ OK ]
此时刷新页面只能出现server4.example.com
[root@server4 ~]# /etc/init.d/httpd stop
Stopping httpd: [ OK ]
此时刷新页面会出现503报错
[root@server1 haproxy]# vim haproxy.cfg
93 frontend westos *:80
94
95 default_backend app
96
97
98 backend app
99 balance roundrobin
100 server web1 172.25.68.12:80 check
101 server web1 172.25.68.13:80 check
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
[root@server1 haproxy]# vim haproxy.cfg
87 listen admin *:8080
88 stats enable
89 stats uri /status
90 stats auth admin:westos
91 stats refresh 5s
92
93 frontend westos *:80
94
95 default_backend app
96
97
98 backend static
99 balance roundrobin
100 server web1 172.25.68.12:80 check
101 backend app
102 balance roundrobin
103 server web2 172.25.68.13:80 check
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
[root@server3 p_w_picpaths]# ls
centos logo.jpg OSI.gif
[root@server3 p_w_picpaths]# pwd
/var/www/html/p_w_picpaths
[root@server1 haproxy]# vim haproxy.cfg
93 frontend westos *:80
94 acl url_static path_beg -i /p_w_picpaths
95 acl url_static path_end -i .jpg .gif .png
96
97
98 use_backend static if url_static
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
测试：
[root@server1 haproxy]# vim haproxy.cfg
98 acl badhost src 172.25.68.250
99 block if badhost
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
测试：
[root@foundation68 haproxy.安装包]# curl 172.25.68.10
403 Forbidden
Request forbidden by administrative rules.
[root@foundation68 haproxy.安装包]# curl -I 172.25.68.10
HTTP/1.0 403 Forbidden
Cache-Control: no-cache
Connection: close
Content-Type: text/html
[root@server1 haproxy]# vim /etc/httpd/conf/httpd.conf
135 #Listen 12.34.56.78:80
136 Listen 8000
[root@server1 haproxy]# vim /var/www/html/index.html
bienaole,fangwenbuliao.........
~
[root@server1 haproxy]# vim haproxy.cfg
100 errorloc 403 http://172.25.68.10:8000
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
测试：
[root@server1 haproxy]# vim haproxy.cfg
99 # block if badhost
100 # errorloc 403 http://172.25.68.10:8000
101
102
103 use_backend static if url_static
104 default_backend app
105
106
107 backend static
108 balance roundrobin
109 server web1 172.25.68.12:80 check
110 backend app
111 balance roundrobin
112 server web2 172.25.68.13:80 check
113 server local 172.25.68.10:8000 backup
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
测试：
[root@server4 ~]# /etc/init.d/httpd stop
Stopping httpd: [ OK
[root@server1 haproxy]# vim haproxy.cfg
102 redirect location http://172.25.68.10:8000 if badhost
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
测试：
[root@foundation68 haproxy.安装包]# curl -I 172.25.68.10
HTTP/1.1 302 Found
Cache-Control: no-cache
Content-length: 0
Location: http://172.25.68.10:8000
Connection: close
[root@server1 haproxy]# vim haproxy.cfg
100 acl westos.org hdr_beg(host) -i westos.org
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
[root@server1 haproxy]# vim haproxy.cfg
100 acl westos.org hdr_beg(host) -i westos.org
101 # block if badhost
102 # errorloc 403 http://172.25.68.10:8000
103
104 #redirect code 301 location http://172.25.68.10:8000 if badhost
105 redirect code 301 location http://www.westos.org if westos.org
106
107 use_backend static if url_static
108 default_backend app
109
110
[root@server1 haproxy]# vim haproxy.cfg
100 acl 172.25.68.10 hdr(host) -i 172.25.68.10
101 acl westos.org hdr_beg(host) -i westos.org
102 # block if badhost
103 # errorloc 403 http://172.25.68.10:8000
104
105 #redirect code 301 location http://172.25.68.10:8000 if badhost
106 redirect code 301 location http://www.westos.org if westos.org
107 redirect code 301 location http://www.westos.org if 172.25.68.10
108
[root@server1 haproxy]# /etc/init.d/haproxy reload
Reloading haproxy:
测试：
在浏览器里输入172.25.68.10会自动跳转到www.westos.org
在浏览器输入westos.org会自动补全为www.westos.org