Docker搭建阿里云DDNS

乌龙茶原创2023年7月13日大约 4 分钟

在NAS自动同步DDNS上使用的是chenhw2/aliyun-ddns-cli:latest，使用的是Go。

作为一名普通的C#开发者，有必要自己来实现，以及顺便学习下Docker，原代码地址。

已升级到.NET 8，AOT对Web开发很好，本机AOT限制很多....

资料

docker-compose.yml

services:
  neverland.aliyun.ddns:
    image: ${DOCKER_REGISTRY-}ali.ddns:1.0.0
    build:
      context: .
      dockerfile: Dockerfile

docker-compose.override.yml

services:
  neverland.aliyun.ddns:
    container_name: ALIYUN-DDNS
    networks:
      - product-network
    environment:
      - ALIKID=
      - ALIKSCT=
      - ALIDOMAIN=ilyl.life
      - ALITTL=600
networks:
  product-network:
    driver: bridge

Dockerfile

提示

最简单的方式是使用VS2022，添加Docker支持，自动生成

#See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.

FROM mcr.microsoft.com/dotnet/runtime:8.0 AS base
USER app
WORKDIR /app

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
# Install clang/zlib1g-dev dependencies for publishing to native
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
    clang zlib1g-dev
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY ["neverland.aliyun.ddns.csproj", "."]
RUN dotnet restore "./././neverland.aliyun.ddns.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "./neverland.aliyun.ddns.csproj" -c $BUILD_CONFIGURATION -o /app/build

FROM build AS publish
ARG BUILD_CONFIGURATION=Release
RUN dotnet publish "./neverland.aliyun.ddns.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=true

FROM mcr.microsoft.com/dotnet/runtime-deps:8.0 AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["./neverland.aliyun.ddns"]

LABEL MAINTAINER=乌龙茶有点甜<ly2@ilyl.life>

ENV ALIKID= \
    ALIKSCT= \
    ALIDOMAIN=ilyl.life \
    ALITTL=600

公网IP

有很多种获取外网IP的方式，这里选用ip-api，个人够用。

利用http://ip-api.com/json/?lang=zh-CN&fields=status,query获取到公网地址。

测试当前公网IP

注意

.NET 8 开启AOT时，ReadFromJsonAsync方法警告,JSON序列化受限

因此需要禁用

using (var client = new HttpClient())
{
    client.BaseAddress = new Uri(Contracts.QUERY_IPADDRESS_URL);

    //不使用这个是因为有使用限制,https://ip-api.com/docs/api:json
    //var query = await client.GetFromJsonAsync<IPModelResult>(Contracts.QUERY_IPADDRESS_RESOURCE, cancelllationToken)
    //     .ConfigureAwait(false);

    try
    {
        using var response = await client.GetAsync(Contracts.QUERY_IPADDRESS_RESOURCE, cancelllationToken)
            .ConfigureAwait(false);
        response.EnsureSuccessStatusCode().WriteRequestToConsole();
        //检查受限情况
        var ri = response.Headers.FirstOrDefault(it => it.Key == Contracts.QUERY_IPADDRESS_HEADER_RI).Value;
        if (ri != null)
        {
            if (ri.ElementAt(0) == "0")
            {
                var ttl = response.Headers.FirstOrDefault(it => it.Key == Contracts.QUERY_IPADDRESS_HEADER_TTL).Value;
                Console.WriteLine($"{Contracts.TITLE}ip地址查询受限,等待{ttl.ElementAt(0)}秒后重试");
                return string.Empty;
            }
        }
        var jsonResponse = await response.Content.ReadFromJsonAsync<IPModelResult>();
        if (jsonResponse != null)
        {
            if (jsonResponse.Status != null && jsonResponse.Status == "success") {
                var networkIp = jsonResponse.Query!;
                Console.WriteLine($"公网IP:{networkIp}");
                return networkIp;
            } 
        }
    }
    catch (TaskCanceledException ex) when (ex.InnerException is TimeoutException tex)
    {
        Console.WriteLine($"Timed out: {ex.Message}, {tex.Message}");
    }
    catch (HttpRequestException ex) when (ex is { StatusCode: HttpStatusCode.NotFound })
    {
        Console.WriteLine($"Not found: {ex.Message}");
    }
    catch (HttpRequestException ex) when (ex is { StatusCode: null })
    {
        Console.WriteLine($"网络连接失败: {ex.Message}");
    }
}
return string.Empty;

环境变量

使用Environment.GetEnvironmentVariable获取环境变量

一是因为账号安全问题

二是Docker运行配置

提示

项目属性，调试，打开调试启动配置文件UI
通过Environment.SetEnvironmentVariable配合#if DEBUG条件编译设置环境变量

云解析

客户端

Client CreateClient(string accessKey, string accessKeySecret)
{
    Config config = new Config
    {
        // 必填，您的 AccessKey ID
        AccessKeyId = accessKey,
        // 必填，您的 AccessKey Secret
        AccessKeySecret = accessKeySecret,
    };
    // Endpoint 请参考 https://api.aliyun.com/product/Alidns
    config.Endpoint = Contracts.DEFAULT_ALIBABA_ENDPOINT;
    return new Client(config);
}

查询云解析记录

DescribeDomainRecordsResponse? QueryDns(Client client, string domain = Contracts.DEBUG_ALIBABA_DOMAIN, string type = Contracts.DEFAULT_ALIBABA_REQUEST_TYPE_4)
{
    DescribeDomainRecordsRequest describeDomainRecordsRequest = new DescribeDomainRecordsRequest()
    {
        DomainName = domain,
        Type = type
    };
    RuntimeOptions runtime = new RuntimeOptions();
    try
    {
        // 复制代码运行请自行打印 API 的返回值
        var response = client.DescribeDomainRecordsWithOptions(describeDomainRecordsRequest, runtime);
        return response;
    }
    catch (TeaException error)
    {
        // 如有需要，请打印 error
        var msg = Common.AssertAsString(error.Message);
        Console.WriteLine($"{Contracts.TITLE}查询云解析失败,{msg}");
    }
    catch (Exception _error)
    {
        TeaException error = new TeaException(new Dictionary<string, object>
                {
                    { "message", _error.Message }
                });
        // 如有需要，请打印 error
        var msg = Common.AssertAsString(error.Message);
        Console.WriteLine($"{Contracts.TITLE}查询云解析失败,{msg}");
    }
    return null;
}

新增云解析记录

AddDomainRecordResponse? AddDns(Client client, string newIp, string domain = Contracts.DEBUG_ALIBABA_DOMAIN, int ttl = Contracts.DEFAULT_ALIBABA_REQUEST_TTL)
{
    //参数
    AddDomainRecordRequest addDomainRecordRequest = new AddDomainRecordRequest()
    {
        DomainName = domain,//域名名称
        RR = Contracts.DEFAULT_ALIBABA_REQUEST_RR,//主机记录
        Type = Contracts.DEFAULT_ALIBABA_REQUEST_TYPE_4,//解析记录类型
        Value = newIp,//记录值
        TTL = ttl
    };
    //运行时高级配置
    RuntimeOptions runtime = new RuntimeOptions();
    try
    {
        // 复制代码运行请自行打印 API 的返回值
        var response = client.AddDomainRecordWithOptions(addDomainRecordRequest, runtime);
        return response;
    }
    catch (TeaException error)
    {
        // 如有需要，请打印 error
        var msg = Common.AssertAsString(error.Message);
        Console.WriteLine($"{Contracts.TITLE}新增云解析失败,{msg}");
    }
    catch (Exception _error)
    {
        TeaException error = new TeaException(new Dictionary<string, object>
                {
                    { "message", _error.Message }
                });
        // 如有需要，请打印 error
        var msg = Common.AssertAsString(error.Message);
        Console.WriteLine($"{Contracts.TITLE}新增云解析失败,{msg}");
    }
    return null;
}

更新云解析记录

UpdateDomainRecordResponse? UpdateDns(Client client, string recordId, string newIp, string RR = Contracts.DEFAULT_ALIBABA_REQUEST_RR, string type = Contracts.DEFAULT_ALIBABA_REQUEST_TYPE_4)
{
    UpdateDomainRecordRequest updateDomainRecordRequest = new UpdateDomainRecordRequest()
    {
        RecordId = recordId,
        RR = RR,
        Type = type,
        Value = newIp,
    };
    RuntimeOptions runtime = new RuntimeOptions();
    try
    {
        // 复制代码运行请自行打印 API 的返回值
        var response = client.UpdateDomainRecordWithOptions(updateDomainRecordRequest, runtime);
        return response;
    }
    catch (TeaException error)
    {
        // 如有需要，请打印 error
        var msg = Common.AssertAsString(error.Message);
        Console.WriteLine($"{Contracts.TITLE}修改云解析失败,{msg}");
    }
    catch (Exception _error)
    {
        TeaException error = new TeaException(new Dictionary<string, object>
                {
                    { "message", _error.Message }
                });
        // 如有需要，请打印 error
        var msg = Common.AssertAsString(error.Message);
        Console.WriteLine($"{Contracts.TITLE}修改云解析失败,{msg}");
    }
    return null;
}