HAproxy配置文件操作

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要求

1. 根据用户输入输出对应的backend下的server信息
2. 可添加backend 和sever信息
3. 可修改backend 和sever信息
4. 可删除backend 和sever信息
5. 操作配置文件前进行备份
6 添加server信息时,如果ip已经存在则修改;如果backend不存在则创建;若信息与已有信息重复则不操作

技术分享

 

  1 def find(backend):
  2     ‘‘‘
  3     查看backend下sever信息
  4     :param backend:
  5     :return:
  6     ‘‘‘
  7     ls = []
  8     with open(HA.txt, r) as f:
  9         T = True
 10         for line in f:
 11             # 找到第一个backend,做记录 T = False
 12             if line.strip() == backend %s % (backend):
 13                 T = False
 14                 continue
 15             # 找到第二个backend,做记录 T = True
 16             if T == False and line.strip().startswith(backend):
 17                 T = True
 18                 break
 19             # 把关于False的加入到列表中
 20             if T == False and line.strip():
 21                 ls.append(line.strip())
 22     return ls
 23 
 24 
 25 def check_bk():
 26     ‘‘‘
 27     列出backend的信息
 28     :return: 选中的backend
 29     ‘‘‘
 30     ls = []
 31     T = True
 32     with open(HA.txt, r) as f1:
 33          for line in f1:
 34             if line.strip().startswith(backend) == True:
 35                 to = line.split( )
 36                 ls.append(to[1])
 37          for i, v in enumerate(ls,1):
 38             print (i, v)
 39          while T:
 40              t1 = input(请输入查看的server的 backend信息)
 41              if t1.isdecimal() and int(t1) in range(0,len(ls)+1):
 42                 a = ls[int(t1)-1]
 43                 break
 44              else:
 45                 print(输入有误,重新输入)
 46     return a
 47 
 48 def backup():
 49     ‘‘‘
 50     备份
 51     :return:
 52     ‘‘‘
 53     with open(HA.txt, r) as f1, open(HA_old.txt, w) as f2:
 54         for line in f1:
 55             f2.write(line)
 56 
 57 
 58 def add(bk, sr):
 59     ‘‘‘
 60     添加记录
 61     :param bk:
 62     :param sr:
 63     :return:
 64     ‘‘‘
 65     r_list = find(bk)
 66     # 没有关于bk的记录,直接添加内容
 67     T = True
 68     a = backend %s % bk
 69     backup()
 70     if not r_list:
 71         with open(HA.txt, a) as f1:
 72             f1.write(\\n%s\\n% a)
 73             f1.write("        %s\\n" % sr)
 74     # 有关于bk的记录
 75     else:
 76         # 没有sever记录
 77         backup()
 78         if sr not in r_list:
 79             with open(HA_old.txt, r) as f1, open(HA.txt, w) as f2:
 80                 for line in f1:
 81                     if line.strip() == backend %s % (bk):
 82                         T = False
 83                         f2.write(line)
 84                         continue
 85                     if T == False and line.strip().startswith(backend):
 86                         T = True
 87                     if T == True:
 88                         f2.write(line)
 89                     else:
 90                         if sr not in r_list:
 91                             r_list.append(sr)
 92                             t = \\n        .join(r_list)
 93                             f2.write( * 8 + t + \\n\\n)
 94     # 有sever记录,直接复制
 95         else:
 96             print(记录已存在,请重新选择)
 97             caidan()
 98 
 99 
100 def update_bk ():
101     ‘‘‘
102     需要修改或删除backend
103     :return:
104     ‘‘‘
105     backup()
106     T = True
107     bk = check_bk()
108     ls =[]
109     with open(HA.txt, r) as f1:
110          for line in f1:
111             if line.strip().startswith(backend) == True:
112                 to = line.split( )
113                 ls.append(to[1].strip())
114     c = input(‘‘‘
115     请选择需要选项:
116     1 修改backend
117     2 删除backend
118     ‘‘‘)
119     while T:
120         #修改backend信息
121         if c == 1:
122             bk1 = input(请输入修改后的backend信息)
123             t3 = input(信息确认请按 y, 重新输入请按其他键)
124             if bk1 in ls:
125                 print(信息已存在,请重新选择)
126                 break
127             else:
128                 if t3.lower() == y:
129                     with open(HA_old.txt, r) as f1, open(HA.txt, w) as f2:
130                         for line in f1:
131                             #需要修改的backend
132                             if line.strip() == backend %s % (bk.strip()):
133                                 f2.write(backend %s \\n % (bk1))
134                             else:
135                                 f2.write(line)
136                         print(修改成功)
137                         break
138                 else:
139                     continue
140             #删除backend信息
141         elif c == 2:
142             t = find(bk.strip())
143             while T:
144                 with open(HA_old.txt, r) as f1, open(HA.txt, w) as f2:
145                     for line in f1:
146                         if line.strip() == backend %s % (bk.strip()):
147                             continue
148                         if line.strip() in t:
149                             continue
150                         else:
151                             f2.write(line)
152                     print(删除成功)
153                     break
154             break
155 
156 def check_sr():
157     T1 = True
158     while T1:
159         cont = 0
160         a1 = input(sever:)
161         ti = a1.split(.)
162         for ii in ti:
163             if ii.isdecimal() and int(ii) in range(0, 255) and len(ti) == 4:
164                 cont = cont + 1
165                 continue
166             else:
167                 print(输入有误,请输入由四组0-255组成的IP地址)
168                 break
169         if cont == 4:
170             break
171     return a1
172 
173 
174 def update_sr():
175     ‘‘‘
176     修改或删除sever
177     :return:
178     ‘‘‘
179     t = check_bk()
180     backup()
181     T = True
182     T1 = True
183     ls = find(t.strip())
184     cc = 0
185     with open(HA_old.txt, r) as f1, open(HA.txt, w) as f2:
186         for line in f1:
187             if line.strip() == backend %s %(t.strip()):
188                 T = False
189                 f2.write(line)
190                 continue
191             if T == False and line.strip().startswith(backend):
192                 T = True
193             if T == True:
194                 if line.strip() != cc and line.strip() not in ls:
195                     f2.write(line)
196 
197             else:
198                 for i, v in enumerate(ls, 1):
199                     print (%s: %s % (i, v))
200                 while T1:
201                     v1 = input(请输入要修改或删除的编号)
202                     if v1.isdecimal() and int(v1) in range(len(ls)+1):
203                         break
204                     else:
205                         print(输入有误,请重新输入)
206                         continue
207                 x = input(请选择 1 = 修改 其他键 = 删除)
208                 if x == 1:
209                     while T1:
210                         a1 = check_sr()
211                         a2 = input(weight:)
212                         a3 = input(maxconn:)
213                         if a2.isdecimal() and a3.isdecimal():
214                             t1 = server %s %s weight %s maxconn %s % (a1, a1, a2, a3)
215                             print(backend: %s \\n%s % (t, t1))
216                         else:
217                             print(所输入weight 和 maxconn 必须为数字,请重新输入)
218                             continue
219                         li_sr = server %s %s weight %s maxconn %s % (a1, a1, a2, a3)
220                         # server
221                         if li_sr in ls:
222                             tt = input(server已存在,请按 y = 重新输入,或按 other key = 返回)
223                             if tt == y:
224                                 continue
225                             else:
226                                 break
227                         else:
228                             a4 = input(请确认信息正确,y = 确认, other key  = 重新输入)
229 
230                             if a4 == y:
231                                 f2.write( *8 + li_sr +\\n)
232                             else:
233                                 continue
234                             print(修改成功)
235                             break
236                     cc = ls[int(v1)-1]
237                     del ls[int(v1)-1]
238                     for tt in ls:
239                         f2.write( *8 + tt +\\n)
240                     T = True
241                 else:
242                     print(删除成功)
243                     cc = ls[int(v1)-1]
244                     del ls[int(v1)-1]
245                     for tt in ls:
246                         f2.write( *8 + tt +\\n)
247                     T = True
248 
249 
250 def caidan ():
251     T = True
252     while T:
253         ls = input(‘‘‘请输入所需编号:
254         1 查看backend下sever信息
255         2 添加记录
256         3 修改或删除backend
257         4 修改或删除sever
258         5 退出
259         ‘‘‘)
260         if ls == 1:
261             i = check_bk()
262             l1 = find(i.strip())
263             for a in l1:
264                 print (a)
265         elif ls == 2:
266             while T:
267                 t = input(请输入backend信息)
268                 print(请输入sever信息)
269                 cont = 0
270                 while T:
271                     a1 = input(sever:)
272                     ti = a1.split(.)
273                     for ii in ti:
274                         if ii.isdecimal() and int(ii) in range(0, 255) and len(ti) == 4:
275                             cont = cont + 1
276                             continue
277                         else:
278                             print(输入有误,请输入由四组0-255组成的IP地址)
279                             break
280                     if cont == 4:
281                         break
282                 while T:
283                     a2 = input(weight:)
284                     a3 = input(maxconn:)
285                     if a2.isdecimal() and a3.isdecimal():
286                         t1 = server %s %s weight %s maxconn %s % (a1, a1, a2, a3)
287                         print(backend: %s \\n%s % (t, t1))
288                         break
289                     else:
290                         print(所输入weight 和 maxconn 必须为数字,请重新输入)
291                         continue
292                 t3 = input(信息确认请按 y, 重新输入请按其他键)
293                 if t3.lower() == y:
294                     add (t, t1)
295                     print(添加成功)
296                     break
297                 else:
298                     continue
299         elif ls == 3:
300             update_bk()
301         elif ls == 4:
302             update_sr()
303         elif ls == 5:
304             exit()
305         else:
306             print(输入有误,请重新输入)
307 
308 caidan()

 

def find(backend):
‘‘‘
查看backend下sever信息
:param backend:
:return:
‘‘‘
ls = []
with open(‘HA.txt‘, ‘r‘) as f:
T = True
for line in f:
# 找到第一个backend,做记录 T = False
if line.strip() == ‘backend %s‘ % (backend):
T = False
continue
# 找到第二个backend,做记录 T = True
if T == False and line.strip().startswith(‘backend‘):
T = True
break
# 把关于False的加入到列表中
if T == False and line.strip():
ls.append(line.strip())
return ls


def check_bk():
‘‘‘
列出backend的信息
:return: 选中的backend
‘‘‘
ls = []
T = True
with open(‘HA.txt‘, ‘r‘) as f1:
for line in f1:
if line.strip().startswith(‘backend‘) == True:
to = line.split(‘ ‘)
ls.append(to[1])
for i, v in enumerate(ls,1):
print (i, v)
while T:
t1 = input(‘请输入查看的server的 backend信息‘)
if t1.isdecimal() and int(t1) in range(0,len(ls)+1):
a = ls[int(t1)-1]
break
else:
print(‘输入有误,重新输入‘)
return a

def backup():
‘‘‘
备份
:return:
‘‘‘
with open(‘HA.txt‘, ‘r‘) as f1, open(‘HA_old.txt‘, ‘w‘) as f2:
for line in f1:
f2.write(line)


def add(bk, sr):
‘‘‘
添加记录
:param bk:
:param sr:
:return:
‘‘‘
r_list = find(bk)
# 没有关于bk的记录,直接添加内容
T = True
a = ‘backend %s‘ % bk
backup()
if not r_list:
with open(‘HA.txt‘, ‘a‘) as f1:
f1.write(\\n%s\\n% a)
f1.write(" %s\\n" % sr)
# 有关于bk的记录
else:
# 没有sever记录
backup()
if sr not in r_list:
with open(‘HA_old.txt‘, ‘r‘) as f1, open(‘HA.txt‘, ‘w‘) as f2:
for line in f1:
if line.strip() == ‘backend %s‘ % (bk):
T = False
f2.write(line)
continue
if T == False and line.strip().startswith(‘backend‘):
T = True
if T == True:
f2.write(line)
else:
if sr not in r_list:
r_list.append(sr)
t = \\n.join(r_list)
f2.write(‘ ‘* 8 + t + \\n\\n)
# 有sever记录,直接复制
else:
print(‘记录已存在,请重新选择‘)
caidan()


def update_bk ():
‘‘‘
需要修改或删除backend
:return:
‘‘‘
backup()
T = True
bk = check_bk()
ls =[]
with open(‘HA.txt‘, ‘r‘) as f1:
for line in f1:
if line.strip().startswith(‘backend‘) == True:
to = line.split(‘ ‘)
ls.append(to[1].strip())
c = input(‘‘‘
请选择需要选项:
1 修改backend
2 删除backend
‘‘‘)
while T:
#修改backend信息
if c == ‘1‘:
bk1 = input(‘请输入修改后的backend信息‘)
t3 = input(‘信息确认请按 y, 重新输入请按其他键‘)
if bk1 in ls:
print(‘信息已存在,请重新选择‘)
break
else:
if t3.lower() == ‘y‘:
with open(‘HA_old.txt‘, ‘r‘) as f1, open(‘HA.txt‘, ‘w‘) as f2:
for line in f1:
#需要修改的backend
if line.strip() == ‘backend %s‘ % (bk.strip()):
f2.write(‘backend %s \\n% (bk1))
else:
f2.write(line)
print(‘修改成功‘)
break
else:
continue
#删除backend信息
elif c == ‘2‘:
t = find(bk.strip())
while T:
with open(‘HA_old.txt‘, ‘r‘) as f1, open(‘HA.txt‘, ‘w‘) as f2:
for line in f1:
if line.strip() == ‘backend %s‘ % (bk.strip()):
continue
if line.strip() in t:
continue
else:
f2.write(line)
print(‘删除成功‘)
break
break

def check_sr():
T1 = True
while T1:
cont = 0
a1 = input(‘sever:‘)
ti = a1.split(‘.‘)
for ii in ti:
if ii.isdecimal() and int(ii) in range(0, 255) and len(ti) == 4:
cont = cont + 1
continue
else:
print(‘输入有误,请输入由四组0-255组成的IP地址‘)
break
if cont == 4:
break
return a1


def update_sr():
‘‘‘
修改或删除sever
:return:
‘‘‘
t = check_bk()
backup()
T = True
T1 = True
ls = find(t.strip())
cc = 0
with open(‘HA_old.txt‘, ‘r‘) as f1, open(‘HA.txt‘, ‘w‘) as f2:
for line in f1:
if line.strip() == ‘backend %s‘ %(t.strip()):
T = False
f2.write(line)
continue
if T == False and line.strip().startswith(‘backend‘):
T = True
if T == True:
if line.strip() != cc and line.strip() not in ls:
f2.write(line)

else:
for i, v in enumerate(ls, 1):
print (‘%s: %s‘ % (i, v))
while T1:
v1 = input(‘请输入要修改或删除的编号‘)
if v1.isdecimal() and int(v1) in range(len(ls)+1):
break
else:
print(‘输入有误,请重新输入‘)
continue
x = input(‘请选择 1 = 修改 其他键 = 删除‘)
if x == ‘1‘:
while T1:
a1 = check_sr()
a2 = input(‘weight:‘)
a3 = input(‘maxconn:‘)
if a2.isdecimal() and a3.isdecimal():
t1 = ‘server %s %s weight %s maxconn %s‘ % (a1, a1, a2, a3)
print(‘backend: %s \\n%s‘ % (t, t1))
else:
print(‘所输入weight 和 maxconn 必须为数字,请重新输入‘)
continue
li_sr = ‘server %s %s weight %s maxconn %s‘ % (a1, a1, a2, a3)
# server
if li_sr in ls:
tt = input(‘server已存在,请按 y = 重新输入,或按 other key = 返回‘)
if tt == ‘y‘:
continue
else:
break
else:
a4 = input(‘请确认信息正确,y = 确认, other key = 重新输入‘)

if a4 == ‘y‘:
f2.write(‘ ‘*8 + li_sr +\\n)
else:
continue
print(‘修改成功‘)
break
cc = ls[int(v1)-1]
del ls[int(v1)-1]
for tt in ls:
f2.write(‘ ‘*8 + tt +\\n)
T = True
else:
print(‘删除成功‘)
cc = ls[int(v1)-1]
del ls[int(v1)-1]
for tt in ls:
f2.write(‘ ‘*8 + tt +\\n)
T = True


def caidan ():
T = True
while T:
ls = input(‘‘‘请输入所需编号:
1 查看backend下sever信息
2 添加记录
3 修改或删除backend
4 修改或删除sever
5 退出
‘‘‘)
if ls == ‘1‘:
i = check_bk()
l1 = find(i.strip())
for a in l1:
print (a)
elif ls == ‘2‘:
while T:
t = input(‘请输入backend信息‘)
print(‘请输入sever信息‘)
cont = 0
while T:
a1 = input(‘sever:‘)
ti = a1.split(‘.‘)
for ii in ti:
if ii.isdecimal() and int(ii) in range(0, 255) and len(ti) == 4:
cont = cont + 1
continue
else:
print(‘输入有误,请输入由四组0-255组成的IP地址‘)
break
if cont == 4:
break
while T:
a2 = input(‘weight:‘)
a3 = input(‘maxconn:‘)
if a2.isdecimal() and a3.isdecimal():
t1 = ‘server %s %s weight %s maxconn %s‘ % (a1, a1, a2, a3)
print(‘backend: %s \\n%s‘ % (t, t1))
break
else:
print(‘所输入weight 和 maxconn 必须为数字,请重新输入‘)
continue
t3 = input(‘信息确认请按 y, 重新输入请按其他键‘)
if t3.lower() == ‘y‘:
add (t, t1)
print(‘添加成功‘)
break
else:
continue
elif ls == ‘3‘:
update_bk()
elif ls == ‘4‘:
update_sr()
elif ls == ‘5‘:
exit()
else:
print(‘输入有误,请重新输入‘)

caidan()
























































































































































































































































































































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