修改haproxy配置文件
转载自：http://blog.csdn.net/ygqygq2/article/details/53343847
心得： 最开始的时候看对方的代码一脸蒙蔽。后面一行行的代码去做类似的操作，慢慢地想通了，
程序中出现了一个 global 的内部宣告全局的变量。这个是我觉得不好的地方。还有一个writer 函数可以和add 合并在一起，
最后那个写的确实让我想了很久。不过已经过去了，过程很美妙，没有编程基础的伙伴们，建议多抄一些代码。先抄一遍代码，
后面再去理解，这样记忆更深刻。
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
}
}
作业需求
HAproxy配置文件操作
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
- [x] 博客
- [x] 查询backend下的server信息
- [x] 添加backend和server信息
- [ ] 修改backend 和sever信息
- [x] 删除backend和server信息
思维导图
大佬写的
#!/usr/bin/env python # _*_coding:utf-8_*_ ''' * Created on 2016/11/7 21:24. * @author: Chinge_Yang. ''' import shutil import json def list_function(): print("Please choice the ID of a action.".center(50, "#")) print("[1] 查询 haproxy.cfg backend 信息.") print("[2] 添加 haproxy.cfg backend 信息") print("[3] 删除 haproxy.cfg backend 信息") 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 line = line.strip() if line.startswith("backend") and line == "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): ##3条 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 这个是 fetch 返回值 print(record_list) 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(" " * 4 + 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(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()
我自己写的
#!/usr/bin/env python # -*- coding:utf-8 -*- # Author: liang import shutil def list_show(): print("[1] 查看haproxy.cfg 的backend信息".center(50,'#')) print("[2] 添加 haproxy.cfg 的backend信息".center(50,'#')) print("[3] 删除 haproxy.cfg 的backend信息".center(50,'#')) print("[4] 退出 按q 或者 exit 退出:>>>".center(50,'#')) print("#".center(50,'#')) def select_haproxy(backend): rest=[] flag=False with open("haproxy.txt",'r',encoding="utf-8") as f: for line in f: line=line.strip() if line.startswith("backend") and line == "backend " + backend: flag=True continue if flag and line.startswith("backend"): flag=False break if flag and line.strip(): rest.append(line.strip()) return rest def Write_in(backend,record_list): with open("haproxy.txt", 'r', encoding="utf-8") as f, open("haproxy2.txt", 'w', encoding="utf-8") as f2: flag=False for line in f: if line.strip().startswith("backend") and line.strip() == "backend " + backend: flag=True f2.write(line) for f2_line in record_list: f2.write(" " * 4 + f2_line + " ") continue if flag and line.strip().startswith("backend"): flag=False f2.write(line) continue if not flag and line.strip(): f2.write(line) pass def add_func(backend,record): global change_flag rest=select_haproxy(backend) #查找这个记录是否存在 if not rest: ### backend 不存在 record 不存在 with open("haproxy.txt",'r',encoding="utf-8") as f,open("haproxy2.txt",'w',encoding="utf-8") as f2: for line in f: f2.write(line) f2.write(" backend " + backend + " ") f2.write(" " * 4 + record + " ") print("backend不存在record不存在 写入成功") change_flag = True else: # backend 存在 recore 存在 if record in rest: print("你输入的已经存在数据库中！！！") change_flag=False else: # backend 存在 recore 不存在 rest.append(record) Write_in(backend,rest) print("backend 存在 recore 不存在 写入成功") change_flag=True return change_flag def delete_func(backend,record): global change_flag rest=select_haproxy(backend) if not rest: # backend 不存在 recore 不存在 print("你输入的域名不存在!!!!") change_flag=False else: #backend 存在 recore 存在 if record in rest: rest2=rest.remove(record) Write_in(backend,rest2) print("backend 存在 recore 存在 删除成功！！！") change_flag=True else: #backend 存在 recore 不存在 print("你输入的recore 不存在") change_flag=False return change_flag def output(servers): #输入 servers 信息 print("server 的信息如下:>>>".center(50,'#')) for server in servers: print(" 33[34;1m%s 33[0m" %servers) print("end ".center(50,'#')) # def input_json(): # # 判断输入，要求为json格式 # flag=False # while flag is not True: # aa={"www.baidu.com":"'server':192.168.10.1"} # backend_inpit=input("请输入需要添加的信息:请用字典格式方式例如{%s} "%aa).strip() # try: # backend_inpit=eval(backend_inpit) # except Exception as e: # print(" 33[31;1m请输入以上格式!!!!! 33[0m") # continue # flag=True # return flag # def operate(action): global change_flag if action == "select_haproxy": backend_info=input("请输入你要查询的域名：例如：www.baidu.com:>>") rest=select_haproxy(backend_info) if rest: output(rest) else: print("你输入的没有在数据库中查询不到!!!!") elif action == None: print("不能输入空") else: aa = {"www.baidu.com": "'server':192.168.10.1"} backend_inpit = input("请输入需要添加的信息:请用字典格式方式例如{%s} " % aa).strip() backend_inpit = eval(backend_inpit) for key in backend_inpit: backend=key record=backend_inpit[key] if action=='add_func': add_func(backend,record) elif action=='delete_func': delete_func(backend,record) if change_flag is True: shutil.copy("haproxy.txt","haproxy1.txt") shutil.copy("haproxy2.txt","haproxy.txt") result = select_haproxy(backend) output(result) # 输出获取到的server信息 def input_operate(): input_info=input("请选择你需要输入的ID号:>>>>") if input_info=='1': action= "select_haproxy" elif input_info=='2': action = "add_func" elif input_info=='3': action="delete_func" elif input_info == "q" and input_info=="exit": exit("欢迎下次再来！！！".center(50,'#')) else: print("输入错误".center(50,'#')) action=None return action def main(): exit_flag=False while exit_flag is not True: global change_flag change_flag=False list_show() action=input_operate() operate(action) if __name__ == '__main__': main()
haproxy.cfg 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 51cto.com bind 0.0.0.0:80 option httplog option httpclose option forwardfor log global acl www hdr_reg(host) -i test01.example.com use_backend test01.example.com if www backend test01.example.com server 100.1.7.10 100.1.7.10 weight 20 maxconn 3000 backend test.com server 100.1.7.90 100.1.7.90 weight 20 maxconn 3000 server 100.1.7.66 100.1.7.66 weight 20 maxconn 3000 server 100.1.7.27 100.1.7.27 weight 20 maxconn 3000 server 100.1.7.13 100.1.7.13 weight 20 maxconn 3000 liang backend www.test.com server 100.1.7.13 100.1.7.13 weight 20 maxconn 3000
测试结果：
########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:1 Input backend info:test.com ##############Match the server info:############## server 100.1.7.90 100.1.7.90 weight 20 maxconn 3000 server 100.1.7.66 100.1.7.66 weight 20 maxconn 3000 server 100.1.7.27 100.1.7.27 weight 20 maxconn 3000 ################################################## ########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:2 Input backend info(json):{"test.com":"testtest.com"} Add done ##############Match the server info:############## server 100.1.7.90 100.1.7.90 weight 20 maxconn 3000 server 100.1.7.66 100.1.7.66 weight 20 maxconn 3000 server 100.1.7.27 100.1.7.27 weight 20 maxconn 3000 testtest.com ################################################## ########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:1 Input backend info:test.com ##############Match the server info:############## server 100.1.7.90 100.1.7.90 weight 20 maxconn 3000 server 100.1.7.66 100.1.7.66 weight 20 maxconn 3000 server 100.1.7.27 100.1.7.27 weight 20 maxconn 3000 testtest.com ################################################## ########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:3 Input backend info(json):{"test.com":"testtest.com"} Delete done ##############Match the server info:############## server 100.1.7.90 100.1.7.90 weight 20 maxconn 3000 server 100.1.7.66 100.1.7.66 weight 20 maxconn 3000 server 100.1.7.27 100.1.7.27 weight 20 maxconn 3000 ################################################## ########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:4 Input error! Nothing to do! ########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:3 Input backend info(json):d Input not a json data type! Input backend info(json):{"test01.example.com":"server 100.1.7.27 100.1.7.27 weight 20 maxconn 3000"} ########Only match backend,no need delete!######## ########Please choice the ID of a action.######### 【1】.Fetch haproxy.cfg backend infomation. 【2】.Add haproxy.cfg backend infomation. 【3】.Delete haproxy.cfg backend infomation. #######################End######################## Your input number:q ###################Bye,thanks!#################### Process finished with exit code 1