python第三周作业---haproxy配置文件操作
4.作业需求：
(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
1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 # Author:Ahappier 4 5 6 import os,sys 7 8 #将文本生成字典和列表 9 def show_list(file): 10 backend_list=[] 11 backend_dict={} 12 server_list=[] 13 server_dict={} 14 with open (file,"r") as f: #读取haproxy文件 15 for line in f: 16 line =line.strip() 17 if line.startswith("backend") == True: #判断backend是否开头，并写入backend_list内 18 backend_name = line.split()[1] 19 backend_list.append(backend_name) 20 server_list=[] 21 elif line.startswith("server")== True: 22 server_dict["name"]=line.split()[1] 23 server_dict["ip"]=line.split()[2] 24 server_dict["weight"]=line.split()[4] 25 server_dict["maxconn"]=line.split()[6] 26 server_list.append(server_dict.copy()) 27 backend_dict[backend_name]=server_list 28 return (backend_list,backend_dict) 29 30 #读取backend的内容 31 def backend_show(backend_list): 32 backend_show_dict={} 33 print("backend列表信息如下") 34 for index,k in enumerate(backend_list,1): 35 print(index,k) 36 backend_show_dict[str(index)]=k 37 return backend_show_dict 38 39 #读取server内容 40 def server_show(backend_input,backend_dict): 41 server_show_dict={} 42 server_list=backend_dict[backend_input] 43 for i,k in enumerate(server_list,1): 44 print(i,"name:",k["name"],"\tip:",k["ip"],"\tweight:",k["weight"],"\tmaxconn:",k["maxconn"]) 45 server_show_dict[i]=k 46 return server_show_dict 47 48 #显示操作编号和列表 49 def action_list(): 50 print("****************************************") 51 print("\t\t欢迎来到haproxy操作平台") 52 print("****************************************") 53 print(''' 54 1.查询backend和server信息 55 2.添加backend和server信息 56 3.修改backend和server信息 57 4.删除backend和server信息 58 5.退出 59 ''') 60 print("****************************************") 61 action_num =input("请选择编号（注意是数字）：") 62 return action_num 63 64 #定义查询功能 65 def inquiry(inquiry_input): 66 while True: 67 if inquiry_input in backend_show_dict: 68 backend_input = backend_show_dict[inquiry_input] 69 print(backend_input,":") 70 server_show(backend_input,backend_dict) 71 break 72 elif inquiry_input in backend_show_dict.values(): 73 print(inquiry_input,":") 74 server_show(inquiry_input,backend_dict) 75 break 76 else: 77 inquiry_input = input("输入错误，请重新输入：") 78 79 #定义添加功能 80 def add(add_input,file): 81 (backend_list,backend_dict)= show_list(file) 82 while True: 83 if add_input in backend_show_dict: 84 add_dict={} 85 add_dict["name"]=input("请输入需要增加的server的名称:") 86 add_dict["ip"]= input("请输入需要增加的server的ip：") 87 add_dict["weight"]= input("请输入需要增加的server的weight：") 88 add_dict["maxconn"]= input("请输入需要增加的server的maxconn：") 89 backend_name_add= backend_list[int(add_input)-1] 90 #如果ip存在，就更新weight和maxconn信息 91 for dict in backend_dict[backend_name_add]: 92 if add_dict["ip"] in dict.values(): 93 dict["weight"]=add_dict["weight"] 94 dict["maxconn"]=add_dict["maxconn"] 95 break 96 else: 97 backend_dict[backend_name_add].append(add_dict) 98 99 backup(file,backend_name_add,backend_dict) 100 print("name:%s IP:%s weight:%s manxconn:%s已添加成功"%( 101 add_dict["name"],add_dict["ip"],add_dict["weight"],add_dict["maxconn"])) 102 break 103 else: 104 add_dict={} 105 add_dict["name"]=input("请输入%s下新增的server名称："%add_input) 106 add_dict["ip"]=input("请输入%s下新增的ip："%add_input) 107 add_dict["weight"]=input("请输入%s下新增的weight："%add_input) 108 add_dict["maxconn"]=input("请输入%s下新增的maxconn："%add_input) 109 backend_name_add=add_input 110 backend_dict[backend_name_add]=add_dict 111 112 file_new = "%s_new"%file 113 with open(file,"r") as f_read, open(file_new,"a+")as f_write: 114 for line in f_read: 115 f_write.write(line) 116 f_write.write("\nbackend %s"%backend_name_add) 117 server_line_write = "\n\t\tserver {name} {ip} weight {weight} maxconn {maxconn}\n" 118 f_write.write(server_line_write.format(**add_dict)) 119 120 os.system("mv %s %s_backup"%(file,file)) 121 os.system("mv %s %s"%(file_new,file)) 122 print("\nbackend %s" % backend_name_add) 123 print("name：%s IP：%s weight：%s maxconn：%s已添加成功" % ( 124 add_dict["name"], add_dict["ip"], add_dict['weight'], add_dict['maxconn'])) 125 break 126 127 #定义修改功能 128 def resive(resive_input): 129 resive_dict={} 130 if resive_input in backend_show_dict: #判断输入是否在 131 backend_resive = backend_show_dict[resive_input] #通过编号获取backend 132 resive_choise = input("是否需要修改该backend名称：%s；确认请按'y'，按任意键继续；"%backend_resive) 133 if resive_choise == "y": 134 backend_resive_new = input("请输入修改后的backend的名称：") 135 backend_dict[backend_resive_new]=backend_dict.pop(backend_resive) 136 server_resive=input("是否需要修改%s下的server；确认请按‘y，按任意键继续’"%backend_resive_new) 137 if server_resive =="y": 138 server_resive_dict =server_show(backend_resive_new, backend_dict) 139 server_resive_num=input("请输入需要修改server的编号：") 140 resive_dict["name"]=input("请输入需要修改后server的名称：") 141 resive_dict["ip"]=input("请输入需要修改后ip：") 142 resive_dict["weight"]=input("请输入需要修改后weight：") 143 resive_dict["maxconn"]=input("请输入需要修改后maxconn：") 144 server_resive_dict[int(server_resive_num)]=resive_dict 145 server_resive_dict_backup ={} 146 server_resive_dict_backup[backend_resive_new]=server_resive_dict.values() 147 backup(file,backend_resive,server_resive_dict_backup,backend_resive_new) 148 else: 149 backup(file,backend_resive,backend_dict,backend_resive_new) 150 else: 151 server_resive_dict = server_show(backend_resive, backend_dict) 152 server_resive_num = input("请输入需要修改server的编号：") 153 resive_dict["name"] = input("请输入需要修改后server的名称：") 154 resive_dict["ip"] = input("请输入需要修改后ip：") 155 resive_dict["weight"] = input("请输入需要修改后weight：") 156 resive_dict["maxconn"] = input("请输入需要修改后maxconn：") 157 server_resive_dict[int(server_resive_num)] = resive_dict 158 server_resive_dict_backup = {} 159 server_resive_dict_backup[backend_resive] = server_resive_dict.values() 160 backup(file, backend_resive, server_resive_dict_backup) 161 else: 162 resive_input_return=input("输入的backend不存在，请重新输入:") 163 resive(resive_input_return) 164 165 #定义删除功能 166 def delete(delete_input): 167 if delete_input in backend_show_dict: 168 backend_delete = backend_show_dict[delete_input] 169 delete_choise = input("是否需要删除该backend：%s；确定请按'y',按任意键继续；"%backend_delete) 170 if delete_choise == "y": 171 del backend_dict[backend_delete] 172 backup(file,backend_delete,backend_dict) 173 else: 174 server_delete_dict= server_show(backend_delete,backend_dict) 175 server_delete_num = input("请输入需要删除的server的编号：") 176 while True: 177 if server_delete_num in server_delete_dict: 178 server_delete_dict.pop(server_delete_num) 179 server_delete_dict_backup={} 180 server_delete_dict_backup[backend_delete]=server_delete_dict.values() 181 backup(file,backend_delete,server_delete_dict_backup) 182 break 183 else: 184 server_delete_num = input("输入的编号不存在，请重新输入：") 185 186 #定义退出 187 def backend_exit(): 188 flag_exit = True 189 b_input= input("退出请输入'b';") 190 while flag_exit: 191 if b_input == "b": 192 flag_exit = False 193 return flag_exit 194 else: 195 return backend_exit() 196 197 #定义文档备份 198 def backup(file,backend_name_action,backend_backup_dict,*backend_name_revise): 199 file_new="%s_new"%file 200 add_flag=False 201 with open(file,"r") as f_read,open(file_new,"w+")as f_write: 202 for line in f_read: 203 backend_name="backend %s"%backend_name_action 204 backend_name_revise="".join(tuple(backend_name_revise)) 205 if line.strip() == backend_name: 206 if backend_name_action not in backend_backup_dict and backend_name_revise not in backend_backup_dict: 207 add_flag = True 208 pass 209 elif backend_name_revise in backend_backup_dict: 210 line_revise = "backend %s\n" % backend_name_revise 211 f_write.write(line_revise) 212 for add_dict in backend_backup_dict[backend_name_revise]: 213 server_line_write = '\t\tserver {name} {ip} weight {weight} maxconn {maxconn}\n' 214 f_write.write(server_line_write.format(**add_dict)) 215 add_flag = True 216 else: 217 f_write.write(line) 218 for add_dict in backend_backup_dict[backend_name_action]: 219 server_line_write = '\t\tserver {name} {ip} weight {weight} maxconn {maxconn}\n' 220 f_write.write(server_line_write.format(**add_dict)) 221 add_flag = True 222 elif line.strip().startswith("server") == True and add_flag == True: 223 pass 224 else: 225 f_write.write(line) 226 add_flag = False 227 228 os.system("mv %s %s_backup"%(file, file)) 229 os.system("mv %s %s"%(file_new, file)) 230 231 232 233 234 235 236 237 #主程序 238 flag = True 239 while flag: 240 flag_main = True 241 flag_action = True 242 file = "haproxy" 243 action_num = action_list() 244 (backend_list,backend_dict)=show_list(file) 245 backend_show_dict= backend_show(backend_list) 246 247 248 while flag_main: 249 if action_num == "1": 250 inquiry(input("请输入需要查询的backend编号或名称：")) 251 flag_main = backend_exit() 252 break 253 254 if action_num == "2": 255 add(input("请输入需要添加的现有backend编号或新backend名称："),file) 256 flag_main = backend_exit() 257 break 258 259 if action_num == "3": 260 resive(input("请输入需要修改的backend编号或名称：")) 261 flag_main = backend_exit() 262 break 263 264 if action_num == "4": 265 delete(input("请输入需要删除的backend编号或名称：")) 266 flag_main = backend_exit() 267 break 268 269 if action_num == "5": 270 sys.exit() 271 272 elif action_num not in range(5): 273 print("你输入的有误，请重新输入") 274 flag_main = False
