需求：
1、查 输入：www.oldboy.org 获取当前backend下的所有记录 2、新建 输入： arg = { 'bakend': 'www.oldboy.org', 'record':{ 'server': '100.1.7.9', 'weight': 20, 'maxconn': 30 } } 3、删除 输入： arg = { 'bakend': 'www.oldboy.org', 'record':{ 'server': '100.1.7.9', 'weight': 20, 'maxconn': 30 } }
原配置文件：
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
代码如下：
#Author:Zheng Na # 参考：https://www.cnblogs.com/1dreams/p/6880205.html # 代码缺陷： # 对每次输入都没有做校验，一旦格式错误就报错 # 某些功能未实现 # 将文件先变成一个列表，如果文件很大就没办法了 import json f = open('haproxy.txt','r',encoding="UTF-8") f_new = open('haproxy_new.txt','w',encoding="UTF-8") #将文件内容转换为一个列表，并定义一个变量。 f_list =f.readlines() #print(f_list) process_list = ["获取ha记录","增加ha记录","删除ha记录"] print("可选操作如下：".center(20,'*')) for index,item in enumerate(process_list): print(index+1,item) num = int(input("请输入操作序号：")) if num == 1: read = input("请输入backend：") # 如输入：www.oldboy.org # 利用字符串拼接，定义一个变量，-----backend所在的行。 backend_title = "backend %s " % read if backend_title in f_list: index_bt = f_list.index(backend_title) print(f_list[index_bt],f_list[index_bt+1]) #没有判断backend下面有多少行，万一有很多行呢？ else: print("您查找的内容不存在！") if num ==2: read = input("请输入要新加的记录：") # 如： {"backend": "test.oldboy.org","record":{"server": "100.1.7.9","weight": 20,"maxconn": 30}} # 将read字符串转换成 字典类型 方法1 read_dict = json.loads(read) # 将read字符串转换成 字典类型 方法2 有点儿low # read_dict = eval(read) # 通过列表计数器来判断输入的内容是否在列表中存在，如果计数器为0则不存在，如果计数器不为0则存在。 # 不存在则添加，存在则不添加。 backend_title = "backend %s " % read_dict["backend"] f_find = f_list.count(backend_title) if f_find == 0: for line in f_list: f_new.write(line) f_new.write(" ") f_new.write(backend_title) f_new.write(" server %s %s weight %s maxconn %s" %(read_dict["record"]["server"],read_dict["record"]["server"], read_dict["record"]["weight"],read_dict["record"]["maxconn"])) else: # # 如果已经存在， # # 则在此节点下添加根据用输入构造出的记录，例如： # server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000 # # （可选）可以再对节点下记录进行判断是否已经存在 # 未实现此功能 print("您要添加的记录已存在！") if num == 3: read = input("请输入要删除的记录：") # 如： {"backend": "test.oldboy.org","record":{"server": "100.1.7.9","weight": 20,"maxconn": 30}} # 将read字符串转换成 字典类型 方法1 read_dict = json.loads(read) # 将read字符串转换成 字典类型 方法2 有点儿low # read_dict = eval(read) # 通过列表计数器来判断输入的内容是否在列表中存在，如果计数器为0则不存在，如果计数器不为0则存在。 backend_title = "backend %s " % read_dict["backend"] f_find = f_list.count(backend_title) # 存在则删除 # #去配置文件中找到指定的节点，并在删除指定记录，如： # backend test.oldboy.org # server 100.1.7.10 100.1.7.10 weight 20 maxconn 3000 # server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000 # 删除掉 # # # （可选）如果backend下所有的记录都已经被删除，那么将当前 backend test.oldboy.org 也删除掉。 # 未实现此功能 if f_find != 0: index_bt = f_list.index(backend_title) f_list.pop(index_bt) f_list.pop(index_bt) #删掉index_bt位置元素后，index_bt+1位置元素自动向前占据index_bt位置 for line in f_list: f_new.write(line) else: print("您要删除的记录不存在！") f.close() f_new.close()
# Author:Zheng Na # 参考：https://www.cnblogs.com/Ian-learning/p/7895004.html import json def recd_read(): # 用来读取数据 read = input("请输入backend：") # 如输入：www.oldboy.org with open('haproxy.txt', 'r', encoding='UTF-8') as f: # 用只读的形式打开 for line in f: if 'backend' in line: backend_title = "backend %s " % read if line == backend_title: return print(f.readline()) return print("您查找的内容不存在！") def recd_add(): # 用来增加数据，暂时没有加入判断输入数据类型的内容 read = input( "请输入要新加的记录：") # 如： {"backend": "test.oldboy.org","record":{"server": "100.1.7.9","weight": 20,"maxconn": 30}} # 将read字符串转换成 字典类型 方法1 read_dict = json.loads(read) # 将read字符串转换成 字典类型 方法2 有点儿low # read_dict = eval(read) with open('haproxy.txt', 'r+', encoding='UTF-8') as f: # 用可以读写的形式打开 for line in f: if 'backend' in line: backend_title = "backend {website} ".format(website=read_dict['backend']) if line == backend_title: return print("您要添加的记录已存在！") f.write(" ") f.write(backend_title) f.write(" server {} {} weight {} maxconn {} " .format(read_dict["record"]["server"], read_dict["record"]["server"], read_dict["record"]["weight"], read_dict["record"]["maxconn"])) return print('添加记录成功！') def recd_delete(): # 用来删除数据 read = input( "请输入要删除的记录：") # 如： {"backend": "test.oldboy.org","record":{"server": "100.1.7.9","weight": 20,"maxconn": 30}} # 将read字符串转换成 字典类型 read_dict = json.loads(read) flag = 0 with open('haproxy.txt', 'r', encoding='UTF-8') as f, open('haproxy_tmp.txt', 'w', encoding='UTF-8') as f_tmp: backend_title = "backend {} ".format(read_dict['backend']) for line in f: backend_title = "backend {} ".format(read_dict['backend']) if line == backend_title: flag = 1 f.readline() continue f_tmp.write(line) if flag == 0: return print("您要删除的记录不存在！") else: with open('haproxy.txt', 'w', encoding='UTF-8') as f, open('haproxy_tmp.txt', 'r', encoding='UTF-8') as f_tmp: for line in f_tmp: f.write(line) return print('记录已被删除！') choice_recd = ['add', 'delete', 'read', 'quit'] # 用来判断输入的内容对不对 while True: choice = input("Please choose 'add', 'delete', 'read','quit'>>>") if choice in choice_recd: # 判断输入的内容对不对 if choice == 'add': recd_add() elif choice == 'read': recd_read() elif choice == 'delete': recd_delete() elif choice == 'quit': exit("您已退出程序")
# Author:Zheng Na # 参考：https://www.cnblogs.com/Ian-learning/p/7895004.html import shutil import json def list_function(): print("Please choice the ID of a action.".center(50, "#")) print("【1】.Fetch haproxy.cfg backend infomation.") print("【2】.Add haproxy.cfg backend infomation.") print("【3】.Delete haproxy.cfg backend infomation.") print("End".center(50, "#")) def fetch(backend): # 取出backend相关server信息 result = [] # 定义结果列表 with open("haproxy.cfg", "r", encoding="utf-8") as f: # 循环读取文件 flag = False # 标记为假 for line in f: # 以backend开头 if line.strip().startswith("backend") and line.strip() == "backend " + backend: flag = True # 读取到backend开头的信息，标记为真 continue # 下一个backend开头 if flag and line.strip().startswith("backend"): flag = False break # server信息添加到result列表 if flag and line.strip(): result.append(line.strip()) return result def writer(backend, record_list): with open("haproxy.cfg", "r") as old, open("new.cfg", "w") as new: flag = False for line in old: if line.strip().startswith('backend') and line.strip() == "backend " + backend: flag = True new.write(line) for new_line in record_list: new.write(" " * 4 + new_line + " ") continue # 跳到下一次循环，避免下一个backend写二次 if flag and line.strip().startswith("backend"): # 下一个backend flag = False new.write(line) continue # 退出此循环，避免server信息二次写入 if line.strip() and not flag: new.write(line) def add(backend, record): global change_flag record_list = fetch(backend) # 查找是否存在记录 if not record_list: # backend不存在, record不存在 with open('haproxy.cfg', 'r') as old, open('new.cfg', 'w') as new: for line in old: new.write(line) # 添加新记录 new.write(" backend " + backend + " ") new.write(" " * 8 + record + " ") print(" 33[32;1mAdd done 33[0m") change_flag = True else: # backend存在，record存在 if record in record_list: print(" 33[31;1mRecord already in it,Nothing to do! 33[0m") change_flag = False else: # backend存在，record不存在 record_list.append(record) writer(backend, record_list) print(" 33[32;1mAdd done 33[0m") change_flag = True def delete(backend, record): global change_flag record_list = fetch(backend) # 查找是否存在记录 if not record_list: # backend不存在, record不存在 print("Not match the backend,no need delete!".center(50, "#")) change_flag = False else: # backend存在，record存在 if record in record_list: record_list.remove(record) # 移除元素 writer(backend, record_list) # 写入 print(" 33[31;1mDelete done 33[0m") change_flag = True else: # backend存在，record不存在 print("Only match backend,no need delete!".center(50, "#")) change_flag = False return change_flag def output(servers): # 输出指定backend的server信息 print("Match the server info:".center(50, "#")) for server in servers: print(" 33[32;1m%s 33[0m" % server) print("#".center(50, "#")) def input_json(): # 判断输入，要求为json格式 continue_flag = False while continue_flag is not True: backend_record = input("Input backend info(json):").strip() try: backend_record_dict = json.loads(backend_record) except Exception as e: print(" 33[31;1mInput not a json data type! 33[0m") continue continue_flag = True return backend_record_dict def operate(action): global change_flag if action == "fetch": backend_info = input("Input backend info:").strip() result = fetch(backend_info) # 取出backend信息 if result: output(result) # 输出获取到的server信息 else: print(" 33[31;1mNot a match is found! 33[0m") elif action is None: print(" 33[31;1mNothing to do! 33[0m") else: backend_record_dict = input_json() # 要求输入json格式 for key in backend_record_dict: backend = key record = backend_record_dict[key] if action == "add": add(backend, record) elif action == "delete": delete(backend, record) if change_flag is True: # 文件有修改，才进行文件更新 # 将操作结果生效 shutil.copy("haproxy.cfg", "old.cfg") shutil.copy("new.cfg", "haproxy.cfg") result = fetch(backend) output(result) # 输出获取到的server信息 def judge_input(): # 判断输入功能编号，执行相应步骤 input_info = input("Your input number:").strip() if input_info == "1": # 查询指定backend记录 action = "fetch" elif input_info == "2": # 添加backend记录 action = "add" elif input_info == "3": # 删除backend记录 action = "delete" elif input_info == "q" or input_info == "quit": exit("Bye,thanks!".center(50, "#")) else: print(" 33[31;1mInput error! 33[0m") action = None return action def main(): exit_flag = False while exit_flag is not True: global change_flag change_flag = False list_function() action = judge_input() operate(action) if __name__ == '__main__': main()