.net核心应用程序的Docker容器中的写入文件访问被拒绝

问题描述

我正在尝试在应用执行目录中写入文件

C＃代码

public void SaveFilesToDisk(List<ExportFile> exportFiles,string subDirectory = null)
{
    foreach (var file in exportFiles)
    {
        var hasSubDir = !string.IsNullOrWhiteSpace(subDirectory);
        var path = hasSubDir ? Path.Combine(subDirectory,file.FileName) : file.FileName;
        if (hasSubDir && !Directory.Exists(subDirectory))
        {
            Directory.CreateDirectory(subDirectory);
        }
        if (File.Exists(path))
        {
            File.Delete(path);
        }
        File.WriteAllLines(path,file.Lines);
    }
}

Dockerfile

FROM microsoft/dotnet:2.1-aspnetcore-runtime AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM microsoft/dotnet:2.1-sdk AS build
WORKDIR /src
COPY . ./
WORKDIR "/src/Export.Api"
RUN dotnet build "Export.Api.csproj" -c Release -o /app

FROM build AS publish
RUN dotnet publish "Export.Api.csproj" -c Release -o /app

FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet","Export.Api.dll"]

但是当应用程序尝试写入文件时，出现错误

IOException: Operation not permitted
UnauthorizedAccessException: Access to the path `/app/file.txt` is denied.

如何授予访问权限以在Docker容器中写入文件并创建应用程序的子文件夹？

解决方法

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