阿里云DDNS Python脚本

前言

不用了不用这个了，用ddns-go了现在
在有公网IP的服务器上部署了服务器之后，IP地址会经常变化，这会影响DNS服务的解析。申请了域名之后阿里云服务提供了DNS服务，并可以利用相关API在多种语言下实现DDNS功能。

设备：Raspberrypi 4B
OS：Debian GNU/Linux 11 (bullseye)

Python库安装

sudo pip install aliyun-python-sdk-alidns

Python脚本

主要参考(chaoxi)这篇博文https://blog.csdn.net/qq_37744229/article/details/125388565。
在其基础上把print输出到log文件中，因为需要该脚本在系统启动时运行，输出到log文件方便查看状态。
因为脚本文件第一行是Sha-Bang，这一行的换行符必须为Unix换行符。
根据自己的需要修改是否需要解析ipv4以及ipv6地址，阿里云accessKeyId以及accessSecret在阿里云网站控制台>主账号>AccessKey管理中。

ddns.py:

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#! /usr/bin/python3
import sys
from ast import For
from operator import truediv
from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.acs_exception.exceptions import ClientException
from aliyunsdkcore.acs_exception.exceptions import ServerException
from aliyunsdkalidns.request.v20150109.DescribeSubDomainRecordsRequest import DescribeSubDomainRecordsRequest
from aliyunsdkalidns.request.v20150109.DescribeDomainRecordsRequest import DescribeDomainRecordsRequest
import requests
from urllib.request import urlopen
import json
# import subprocess
from datetime import datetime
from threading import Timer
# import socket

ipv4_flag = 0  # 是否开启ipv4 ddns解析,1为开启，0为关闭
ipv6_flag = 1  # 是否开启ipv6 ddns解析,1为开启，0为关闭
accessKeyId = "xxxxxxxxxx"  # 将accessKeyId改成自己的accessKeyId
accessSecret = "xxxxxxxxxx"  # 将accessSecret改成自己的accessSecret
domain = "xxxxx.xxx"  # 你的主域名
name_ipv4 = "xxx"  # 要进行ipv4 ddns解析的子域名
name_ipv6 = "xxx"  # 要进行ipv6 ddns解析的子域名

client = AcsClient(accessKeyId, accessSecret, 'cn-hangzhou')

def update(RecordId, RR, Type, Value):  # 修改域名解析记录
    from aliyunsdkalidns.request.v20150109.UpdateDomainRecordRequest import UpdateDomainRecordRequest
    request = UpdateDomainRecordRequest()
    request.set_accept_format('json')
    request.set_RecordId(RecordId)
    request.set_RR(RR)
    request.set_Type(Type)
    request.set_Value(Value)
    response = client.do_action_with_exception(request)


def add(DomainName, RR, Type, Value):  # 添加新的域名解析记录
    from aliyunsdkalidns.request.v20150109.AddDomainRecordRequest import AddDomainRecordRequest
    request = AddDomainRecordRequest()
    request.set_accept_format('json')
    request.set_DomainName(DomainName)
    request.set_RR(RR)
    request.set_Type(Type)
    request.set_Value(Value)    
    response = client.do_action_with_exception(request)

def ping(): #ping百度查看网络状态，断网重新执行方法
  try:
   html = requests.get("http://www.baidu.com",timeout=2)
  except:
   return 0
  return 1
    # return1 = subprocess.call('ping www.baidu.com', shell = False)
    # if return1:
    #   return 0
    # else:
    #   return 1

def setDnsv4():
  if ipv4_flag == 1 & ping()==1:
      try:
        request = DescribeSubDomainRecordsRequest()
        request.set_accept_format('json')
        request.set_DomainName(domain)
        request.set_SubDomain(name_ipv4 + '.' + domain)
        request.set_Type("A")
        response = client.do_action_with_exception(request)  # 获取域名解析记录列表
        domain_list = json.loads(response)  # 将返回的JSON数据转化为Python能识别的
        # 加上timeout参数，可判断阿里云是否阻止访问
        ip = urlopen(url='https://api-ipv4.ip.sb/ip',timeout=10.0).read()  # 使用IP.SB的接口获取ipv4地址
        ipv4 = str(ip, encoding='utf-8')
        print("获取到IPv4地址：%s" % ipv4, end="")


        if domain_list['TotalCount'] == 0:
            add(domain, name_ipv4, "A", ipv4)
            print("新建域名解析成功")
        elif domain_list['TotalCount'] == 1:
            if domain_list['DomainRecords']['Record'][0]['Value'].strip() != ipv4.strip():
                update(domain_list['DomainRecords']['Record'][0]['RecordId'], name_ipv4, "A", ipv4)
                print("修改域名解析成功")
            else:  # https://blog.zeruns.tech
                print("IPv4地址没变")
        elif domain_list['TotalCount'] > 1:
            from aliyunsdkalidns.request.v20150109.DeleteSubDomainRecordsRequest import DeleteSubDomainRecordsRequest
            request = DeleteSubDomainRecordsRequest()
            request.set_accept_format('json')
            request.set_DomainName(domain) 
            request.set_RR(name_ipv4)
            request.set_Type("A") 
            response = client.do_action_with_exception(request)
            add(domain, name_ipv4, "A", ipv4)
            print("修改域名解析成功")
      except:
        print("联网失败")

  else:
    print("联网失败")

def setDnsv6():
  if  ipv6_flag == 1 & ping()==1:
      request = DescribeSubDomainRecordsRequest()
      request.set_accept_format('json')
      request.set_DomainName(domain)
      request.set_SubDomain(name_ipv6 + '.' + domain)
      request.set_Type("AAAA")
      response = client.do_action_with_exception(request)  # 获取域名解析记录列表
      domain_list = json.loads(response)  # 将返回的JSON数据转化为Python能识别的

      ip = urlopen('https://api-ipv6.ip.sb/ip').read()  # 使用IP.SB的接口获取ipv6地址
      ipv6 = str(ip, encoding='utf-8')
      print("获取到IPv6地址：%s" % ipv6, end="")

      if domain_list['TotalCount'] == 0:
          add(domain, name_ipv6, "AAAA", ipv6)
          print("新建域名解析成功")
      elif domain_list['TotalCount'] == 1:
          if domain_list['DomainRecords']['Record'][0]['Value'].strip() != ipv6.strip():
              update(domain_list['DomainRecords']['Record'][0]['RecordId'], name_ipv6, "AAAA", ipv6)
              print("修改域名解析成功")
          else: 
              print("IPv6地址没变")
      elif domain_list['TotalCount'] > 1:
          from aliyunsdkalidns.request.v20150109.DeleteSubDomainRecordsRequest import DeleteSubDomainRecordsRequest
          request = DeleteSubDomainRecordsRequest()
          request.set_accept_format('json')
          request.set_DomainName(domain)
          request.set_RR(name_ipv6)  # https://blog.zeruns.tech
          request.set_Type("AAAA") 
          response = client.do_action_with_exception(request)
          add(domain, name_ipv6, "AAAA", ipv6)
          print("修改域名解析成功")

# 打印时间函数
def timeSet(inc):
    savedStdout = sys.stdout  #保存标准输出流
    with open('/home/pi/ddns_log', 'ta') as file:
        sys.stdout = file  #标准输出重定向至文件
        print(datetime.now().strftime("[%Y-%m-%d %H:%M:%S]"), end="")
        # setDnsv4()
        setDnsv6()
    sys.stdout = savedStdout  #恢复标准输出流
    t = Timer(inc, timeSet, (inc,))
    t.start()
# 60s
timeSet(60)

chmod +x ddns.py将脚本修改为可执行文件。
可以./ddns.py看一眼是否能够运行，log信息输出在ddns_log中。

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[2022-11-29 16:26:24]获取到IPv6地址：240e:399:f91:xxxx:dea6:32ff:fe2c:8092
IPv6地址没变
[2022-11-29 16:27:27]获取到IPv6地址：240e:399:f91:xxxx:dea6:32ff:fe2c:8092
IPv6地址没变
[2022-11-29 16:28:28]获取到IPv6地址：240e:399:f91:xxxx:dea6:32ff:fe2c:8092
IPv6地址没变
[2022-11-29 16:29:29]获取到IPv6地址：240e:399:f91:xxxx:dea6:32ff:fe2c:8092
IPv6地址没变

可以用cat指令看ddns_log内内容：
cat ddns_log
用echo清空log文件
echo "" > ddns_log

Linux开机运行脚本

修改/etc/下rc.local文件：
sudo vim /etc/rc.local
在exit 0前加上/home/pi/ddns.py &。
最后给rc.local可执行权限sudo chmod +x /etc/rc.local
重启系统或者执行systemctl restart rc-local即可。