今天弄了一个晚上没弄出来一个小东西，只弄出来了写追加，而且还是笨方法，起码死不掉那种。
global
log 127.0.0.1 local2
daemon
maxconn 256
log 127.0.0.1 local2 info
defaults
log global
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
option dontlognull listen stats :8888
stats enable
stats uri /admin
stats auth admin:1234 frontend oldboy.org
bind 0.0.0.0:80
option httplog
option httpclose
option forwardfor
log global
acl www hdr_reg(host) -i www.oldboy.org
use_backend www.oldboy.org if www backend www.oldboy.org
server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000
global
log 127.0.0.1 local2
daemon
maxconn 256
log 127.0.0.1 local2 info
defaults
log global
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
option dontlognull listen stats :8888
stats enable
stats uri /admin
stats auth admin:1234 frontend oldboy.org
bind 0.0.0.0:80
option httplog
option httpclose
option forwardfor
log global
acl www hdr_reg(host) -i www.oldboy.org
use_backend www.oldboy.org if www backend www.oldboy.org
server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000
global
log 127.0.0.1 local2
daemon
maxconn 256
log 127.0.0.1 local2 info
defaults
log global
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
option dontlognull listen stats :8888
stats enable
stats uri /admin
stats auth admin:1234 frontend oldboy.org
bind 0.0.0.0:80
option httplog
option httpclose
option forwardfor
log global
acl www hdr_reg(host) -i www.oldboy.org
use_backend www.oldboy.org if www backend www.oldboy.org
server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000
global
log 127.0.0.1 local2
daemon
maxconn 256
log 127.0.0.1 local2 info
defaults
log global
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
option dontlognull listen stats :8888
stats enable
stats uri /admin
stats auth admin:1234 frontend oldboy.org
bind 0.0.0.0:80
option httplog
option httpclose
option forwardfor
log global
acl www hdr_reg(host) -i www.oldboy.org
use_backend www.oldboy.org if www backend www.oldboy.org
server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000
现有txt配置文件
具体就是最好一项backend的修改、追加、删除，只弄出来追加，下次再填坑。
具体代码如下
#增加
def add(a,b,c,d):
backend_new = open('haproxy','a+')
backend_new = backend_new.write('backend %s\n\t\tserver %s weight %s maxconn %s'%(a,b,c,d)) add(
a = input('1.输入backend:'),
b = input('2.输入server:'),
c = input('3.输入weight:'),
d = input('4.输入maxconn:')
)
本来还以为def发现新大陆....