需求：
1.使python具体增删查的功能。
haproxy的配置文件。
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
import os,re,sys
from collections import defaultdict,OrderedDict
conf = "haproxy.cfg"
conf_new = "haproxy.cfg.new"
backend_list = []
server_dict= {}
show_dict = {}
backend_name_dict = {}
server_info= []
server_flag = False ###初始化server判断标志位###
with open(conf,'r') as ha: ###打开haproxy配置文件###
for line in ha:
line = line.strip('\n')
if re.match('backend',line): ###匹配配置文件以backend开头的行###
backend_name = re.split('\s+',line)[1]
backend_list.append(backend_name)
server_info1 = []
server_flag = True ###赋值标志位为真，用来与server关联###
elif server_flag and re.match('\s+server',line): ###匹配配置文件以server开头的行###
server_info = re.split('\s+',line)
server_info.remove('')
server_info1.append(server_info)
server_dict['server'] = server_info[1]
server_dict['weight'] = server_info[4]
server_dict['maxconn'] = server_info[5]
backend_name_dict[backend_name] = "name"
backend_name_dict[backend_name] = server_info1
else:
server_flag = False
#循环
options_list = ["1.查询backend","2.删除backend","3.新增backend","5.退出"]
while True:
for i in options_list:
print(i)
find = (input("\033[94m请选择操作条目序号：\033[0m"))
if find.isdigit():
find = int((find))
#1是查询
if find == 1:
for i, ele in enumerate(backend_list):
print(i, ele)
find1 = input("请输入您要查询的backend的序号：")
find1 = int(find1)
for j in range(1):
print("==========%s============" %backend_list[find1])
for i in backend_name_dict[backend_list[find1]]:
print("server %s weigt %s maxconn %s" %(i[1],i[3],i[5]))
#2是删除
elif find == 2:
for i, ele in enumerate(backend_list):
print(i, ele)
find3 = int(input("请选择您要删除backend的序号："))
server_show = []
for i, ele in enumerate(backend_name_dict[backend_list[find3]]):
server_show.append("server %s weight %s maxconn %s" % (ele[1], ele[3], ele[5]))
print(i, "server %s weight %s maxconn %s" % (ele[1], ele[3], ele[5]))
server_show1= str(server_show[0])
print(server_show1)
f = open(conf, "r")
f1 = open(conf_new, "a+")
for i in f:
if server_show1 in i:
i = i.replace(server_show1, "")
f1.write(i)
f1.flush()
f.close()
f1.close()
os.remove(conf)
os.rename(conf_new, conf)
backend_list1 = []
backend_list1.append("backend %s" %(backend_list[find3]))
backend_list2 = str(backend_list1[0])
f = open(conf, "r")
f1 = open(conf_new, "a+")
for i in f:
if backend_list2 in i:
i = i.replace(backend_list2, "")
f1.write(i)
f1.flush()
f.close()
f1.close()
os.remove(conf)
os.rename(conf_new, conf)
print("删除成功！！！")
#3是增加
elif find == 3:
arg = []
backend_name1 = []
backend_list3 = []
input_back = input("\033[94m请输入backend(www.orgboy.org):\033[0m")
arg.append("backend %s" %input_back)
input_server = input("\033[94m请输入server(127.0.0.1):\033[0m")
input_weight = input("\033[94m请输入weight(20):\033[0m")
# arg["weight"] = input_weight
input_maxconn = input("\033[94m请输入maxconn(3000):\033[0m")
arg.append(" server %s weight %s maxconn %s" %(input_server,input_weight,input_maxconn))
backend_name1 = str(arg[0])
f = open(conf, "a+")
f.write("%s \n" %backend_name1)
f.flush()
f.close()
backend_list3 = arg[1]
backend_list3 = str(backend_list3)
f = open(conf, "a+")
f.write("%s \n" %backend_list3)
f.close()
print("添加成功！！！")
#5是退出
elif find == 5:
exit()
else:
print("\033[91m请输入正确的序号\033[0m")
continue