Haproxy的安裝和配置
Desktop1:172.25.68.1
Desktop2:172.25.68.2
Desktop3:172.25.68.3
真機: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
編輯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
編輯 vim /var/www/html/index.html
Desktop3.example.com
/etc/init.d/httpd start
測試：輸入172.25.68.250:80
在desktop1上修改
編輯 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
測試： 172.25.68.250:8080/status 任意關閉開啓desktop1和desktop2的http服務 注意觀察顏色變化
動靜分離：
desktop1:
編輯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 ##靜態
balance roundrobin
server web1 172.25.68.2:80 check
backend app ##動態
balance roundrobin
server web2 172.25.68.1:80 check
/etc/init.d/haproxy reload
Desktop2
cd /var/www/html
mkdir images
cd images
拷貝OSI.gif，redhat.jpg到該目錄
測試：172.25.68.250/images/redhat.jpg 或者 172.25.68.250/images/OSI.gif
訪問權限的設置
desktop1:
編輯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
測試: 172.25.68.250 報錯403
修改默認端口：編輯vim /etc/httpd/conf/httpd.conf
135 #Listen 12.34.56.78:80
136 Listen 8000
編輯vim /var/www/html
維護中，表鬧........
/etc/init.d/httpd start
Desktop1:
編輯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
測試:172.25.68.250