在 docker 中构建 dotnet 核心应用程序 - 永远运行

【问题标题】：Build dotnet core application within docker - runs forever在 docker 中构建 dotnet 核心应用程序 - 永远运行
【发布时间】：2020-08-29 11:23:31
【问题描述】：

我正在尝试构建一个简单的dotnet core 应用程序并将其包装在 docker 映像中。在构建映像期间，所有dotnet 命令（如dotnet restore 或dotnet build）都会一直运行而没有任何进展，但会占用大约50% 的CPU。我让它运行了至少一个小时，但它从未停止过。正常的dotnet restore 只需要几毫秒，所以肯定有问题。

重现步骤。

  1. 安装 dotnet sdk。
    • dotnet --version
    • 给予：3.1.200
  2. mkdir TestApplication
  3. cd TestApplication
  4. dotnet new console
  5. dotnet run/restore/build 一切正常
  6. 接下来，我们创建一个 Dockerfile：
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build

WORKDIR /

COPY *.csproj ./
RUN dotnet restore

COPY . .

RUN dotnet build
RUN dotnet publish -c Release -o out

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 AS runtime
COPY --from=build /aspnetapp/out ./
ENTRYPOINT ["dotnet", "aspnetapp.dll"]
  1. docker build -t myTestApplication .

结果：总是在第一个dotnet 命令处挂起，即使在玩。在 macOS Catalina (10.15.6) 上运行。

有人知道这里出了什么问题吗？我尝试为一个运行良好的 Python 应用程序创建一个图像，所以它似乎与 dotnet 有关。

编辑 1： 添加详细日志输出：

(base) ➜  TestApplication docker build -t testerico .
Sending build context to Docker daemon   5.12kB
Step 1/9 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build
 ---> 9ab567a29502
Step 2/9 : WORKDIR /
 ---> Using cache
 ---> ec8404eb93c3
Step 3/9 : COPY *.csproj ./
 ---> Using cache
 ---> 86a4e6875b03
Step 4/9 : RUN dotnet restore --verbosity diagnostic
 ---> Running in 1791f6205c36
/usr/share/dotnet/sdk/3.1.401/MSBuild.dll -nologo -distributedlogger:Microsoft.DotNet.Tools.MSBuild.MSBuildLogger,/usr/share/dotnet/sdk/3.1.401/dotnet.dll*Microsoft.DotNet.Tools.MSBuild.MSBuildForwardingLogger,/usr/share/dotnet/sdk/3.1.401/dotnet.dll -maxcpucount -target:Restore -verbosity:m -verbosity:diagnostic ./TestApplication.csproj
Build started 08/29/2020 11:49:23.
Environment at start of build:
NUGET_XMLDOC_MODE = skip
DOTNET_USE_POLLING_FILE_WATCHER = true
PATH = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
DOTNET_RUNNING_IN_CONTAINER = true
HOME = /root
DOTNET_HOST_PATH = /usr/share/dotnet/dotnet
POWERSHELL_DISTRIBUTION_CHANNEL = PSDocker-DotnetCoreSDK-Debian-10
MSBuildExtensionsPath = /usr/share/dotnet/sdk/3.1.401/
MSBuildSDKsPath = /usr/share/dotnet/sdk/3.1.401/Sdks
HOSTNAME = 1791f6205c36
PWD = /
DOTNET_CLI_TELEMETRY_SESSIONID = af7fc2b0-1308-4572-99e7-30bae6e369e8
MSBuildLoadMicrosoftTargetsReadOnly = true

11:49:23.778     0>Process = "/usr/share/dotnet/dotnet"
                   MSBuild executable path = "/usr/share/dotnet/sdk/3.1.401/MSBuild.dll"
                   Command line arguments = "/usr/share/dotnet/sdk/3.1.401/MSBuild.dll -maxcpucount -verbosity:m -nologo -target:Restore -verbosity:diagnostic -distributedlogger:Microsoft.DotNet.Tools.MSBuild.MSBuildLogger,/usr/share/dotnet/sdk/3.1.401/dotnet.dll*Microsoft.DotNet.Tools.MSBuild.MSBuildForwardingLogger,/usr/share/dotnet/sdk/3.1.401/dotnet.dll"
                   Current directory = "/"
                   MSBuild version = "16.7.0-preview-20360-03+188921e2f"
                   Resolving SDK 'Microsoft.NET.Sdk'...
                   Property reassignment: $(MSBuildProjectExtensionsPath)="/obj/" (previous value: "obj\") at /usr/share/dotnet/sdk/3.1.401/Current/Microsoft.Common.props (56,5)
                   Property reassignment: $(TargetsForTfmSpecificContentInPackage)=";PackTool;_PackProjectToolValidation" (previous value: ";PackTool") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PackProjectTool.props (15,5)
                   Property reassignment: $(OutputType)="Exe" (previous value: "Library") at /TestApplication.csproj (4,5)
                   Property reassignment: $(PublishProfileImported)="false" (previous value: "true") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.ImportPublishProfile.targets (28,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**" (previous value: ";bin/Debug//**") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets (171,5)
                   Property reassignment: $(IntermediateOutputPath)="obj\Debug\netcoreapp3.1\" (previous value: "obj\Debug\") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets (185,5)
                   Property reassignment: $(OutputPath)="bin/Debug/netcoreapp3.1/" (previous value: "bin/Debug/") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets (186,5)
                   Property reassignment: $(_FrameworkVersionForImplicitDefine)="3_1" (previous value: "3.1") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.BeforeCommon.targets (165,5)
                   Property reassignment: $(_DebugSymbolsProduced)="true" (previous value: "false") at /usr/share/dotnet/sdk/3.1.401/Microsoft.Common.CurrentVersion.targets (149,5)
                   Property reassignment: $(_DocumentationFileProduced)="false" (previous value: "true") at /usr/share/dotnet/sdk/3.1.401/Microsoft.Common.CurrentVersion.targets (158,5)
                   Property reassignment: $(ProcessorArchitecture)="msil" (previous value: "") at /usr/share/dotnet/sdk/3.1.401/Microsoft.Common.CurrentVersion.targets (487,5)
                   Property reassignment: $(DelaySign)="" (previous value: "false") at /usr/share/dotnet/sdk/3.1.401/Microsoft.Common.CurrentVersion.targets (527,5)
                   Property reassignment: $(_SGenGenerateSerializationAssembliesConfig)="Auto" (previous value: "") at /usr/share/dotnet/sdk/3.1.401/Microsoft.Common.CurrentVersion.targets (3491,5)
                   Property reassignment: $(_SGenGenerateSerializationAssembliesConfig)="Off" (previous value: "Auto") at /usr/share/dotnet/sdk/3.1.401/Microsoft.Common.CurrentVersion.targets (3492,5)
                   Property reassignment: $(MSBuildAllProjects)=";/usr/share/dotnet/sdk/3.1.401/NuGet.targets;/usr/share/dotnet/sdk/3.1.401/Current/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets" (previous value: ";/usr/share/dotnet/sdk/3.1.401/NuGet.targets") at /usr/share/dotnet/sdk/3.1.401/Current/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets (16,5)
                   Property reassignment: $(ProjectAssetsFile)="/obj/project.assets.json" (previous value: "/obj//project.assets.json") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets (24,5)
                   Property reassignment: $(ProjectAssetsCacheFile)="/obj/Debug/netcoreapp3.1/TestApplication.assets.cache" (previous value: "obj\Debug\netcoreapp3.1\TestApplication.assets.cache") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets (29,5)
                   Property reassignment: $(ResolveAssemblyReferencesDependsOn)="
                         
                         ResolveProjectReferences;
                         FindInvalidProjectReferences;
                         GetFrameworkPaths;
                         GetReferenceAssemblyPaths;
                         PrepareForBuild;
                         ResolveSDKReferences;
                         ExpandSDKReferences;
                       ;
                         ResolvePackageDependenciesForBuild;
                         _HandlePackageFileConflicts;
                       " (previous value: "
                         ResolveProjectReferences;
                         FindInvalidProjectReferences;
                         GetFrameworkPaths;
                         GetReferenceAssemblyPaths;
                         PrepareForBuild;
                         ResolveSDKReferences;
                         ExpandSDKReferences;
                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets (71,5)
                   Property reassignment: $(PrepareResourcesDependsOn)="
                         ResolvePackageDependenciesForBuild;
                         _HandlePackageFileConflicts;
                         
                         ;
                         PrepareResourceNames;
                         ResGen;
                         CompileLicxFiles
                       
                       " (previous value: "
                         ;
                         PrepareResourceNames;
                         ResGen;
                         CompileLicxFiles
                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets (77,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**;bin//**" (previous value: ";bin/Debug//**;obj\Debug\/**") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets (27,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**" (previous value: ";bin/Debug//**;obj\Debug\/**;bin//**") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets (29,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user" (previous value: ";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets (32,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user;**/*.*proj" (previous value: ";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets (33,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user;**/*.*proj;**/*.sln" (previous value: ";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user;**/*.*proj") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets (34,5)
                   Property reassignment: $(DefaultItemExcludes)=";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user;**/*.*proj;**/*.sln;**/*.vssscc" (previous value: ";bin/Debug//**;obj\Debug\/**;bin//**;obj\/**;**/*.user;**/*.*proj;**/*.sln") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.DefaultItems.targets (35,5)
                   Property reassignment: $(ResolveAssemblyReferencesDependsOn)="
                         
                         
                         ResolveProjectReferences;
                         FindInvalidProjectReferences;
                         GetFrameworkPaths;
                         GetReferenceAssemblyPaths;
                         PrepareForBuild;
                         ResolveSDKReferences;
                         ExpandSDKReferences;
                       ;
                         ResolvePackageDependenciesForBuild;
                         _HandlePackageFileConflicts;
                       ;
                         ResolveTargetingPackAssets;
                       " (previous value: "
                         
                         ResolveProjectReferences;
                         FindInvalidProjectReferences;
                         GetFrameworkPaths;
                         GetReferenceAssemblyPaths;
                         PrepareForBuild;
                         ResolveSDKReferences;
                         ExpandSDKReferences;
                       ;
                         ResolvePackageDependenciesForBuild;
                         _HandlePackageFileConflicts;
                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets (14,5)
                   Property reassignment: $(_GenerateRuntimeConfigurationPropertyInputsCache)="/obj/Debug/netcoreapp3.1/TestApplication.genruntimeconfig.cache" (previous value: "obj\Debug\netcoreapp3.1\TestApplication.genruntimeconfig.cache") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets (53,5)
                   Property reassignment: $(_DefaultUserProfileRuntimeStorePath)="/root/.dotnet/store" (previous value: "/root") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets (97,5)
                   Property reassignment: $(CoreBuildDependsOn)="
                         _CheckForBuildWithNoBuild;
                         
                         BuildOnlySettings;
                         PrepareForBuild;
                         PreBuildEvent;
                         ResolveReferences;
                         PrepareResources;
                         ResolveKeySource;
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                         ExportWindowsMDFile;
                         UnmanagedUnregistration;
                         GenerateSerializationAssemblies;
                         CreateSatelliteAssemblies;
                         GenerateManifests;
                         GetTargetPath;
                         PrepareForRun;
                         UnmanagedRegistration;
                         IncrementalClean;
                         PostBuildEvent
                       ;
                         GenerateBuildDependencyFile;
                         GenerateBuildRuntimeConfigurationFiles
                       " (previous value: "
                         BuildOnlySettings;
                         PrepareForBuild;
                         PreBuildEvent;
                         ResolveReferences;
                         PrepareResources;
                         ResolveKeySource;
                         Compile;
                         ExportWindowsMDFile;
                         UnmanagedUnregistration;
                         GenerateSerializationAssemblies;
                         CreateSatelliteAssemblies;
                         GenerateManifests;
                         GetTargetPath;
                         PrepareForRun;
                         UnmanagedRegistration;
                         IncrementalClean;
                         PostBuildEvent
                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets (118,5)
                   Property reassignment: $(CoreCleanDependsOn)="
                         _SdkBeforeClean;
                         
                       " (previous value: "") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets (127,5)
                   Property reassignment: $(RebuildDependsOn)="
                         _SdkBeforeRebuild;
                         
                         BeforeRebuild;
                         Clean;
                         Build;
                         AfterRebuild;
                       
                       " (previous value: "
                         BeforeRebuild;
                         Clean;
                         Build;
                         AfterRebuild;
                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets (134,5)
                   Property reassignment: $(CompileDependsOn)="
                         
                         ResolveReferences;
                         ResolveKeySource;
                         SetWin32ManifestProperties;
                         FindReferenceAssembliesForReferences;
                         _GenerateCompileInputs;
                         BeforeCompile;
                         _TimeStampBeforeCompile;
                         _GenerateCompileDependencyCache;
                         CoreCompile;
                         _TimeStampAfterCompile;
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                       ;
                         _CreateAppHost;
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                       " (previous value: "
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                         _TimeStampBeforeCompile;
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                         CoreCompile;
                         _TimeStampAfterCompile;
                         AfterCompile;
                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.targets (396,5)
                   Property reassignment: $(CreateSatelliteAssembliesDependsOn)="
                         
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                         ComputeIntermediateSatelliteAssemblies;
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                       ;
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                   Property reassignment: $(DesignerRuntimeImplementationProjectOutputGroupDependsOn)="
                         
                         ;
                         
                         ;
                         BuildOnlySettings;
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                       ;
                         _GenerateDesignerDepsFile;
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                       " (previous value: "
                         ;
                         
                         ;
                         BuildOnlySettings;
                         PrepareForBuild;
                         AssignTargetPaths;
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                       ") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.DesignerSupport.targets (21,5)
                   Property reassignment: $(_ShimInputCacheFile)="/obj/Debug/netcoreapp3.1/TestApplication.shiminput.cache" (previous value: "obj\Debug\netcoreapp3.1\TestApplication.shiminput.cache") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PackTool.targets (94,5)
                   Property reassignment: $(_ShimCreatedSentinelFile)="/obj/Debug/netcoreapp3.1/TestApplication.shimcreated.sentinel" (previous value: "obj\Debug\netcoreapp3.1\TestApplication.shimcreated.sentinel") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.PackTool.targets (96,5)
                   Property reassignment: $(DefineConstants)="TRACE;DEBUG" (previous value: "TRACE") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets (31,5)
                   Property reassignment: $(DefineConstants)="TRACE;DEBUG;NETCOREAPP;NETCOREAPP3_1" (previous value: "TRACE;DEBUG") at /usr/share/dotnet/sdk/3.1.401/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.CSharp.targets (34,5)
                   Resolving SDK 'ILLink.Tasks'...
                   Property reassignment: $(MSBuildAllProjects)=";/usr/share/dotnet/sdk/3.1.401/NuGet.targets;/usr/share/dotnet/sdk/3.1.401/Current/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets;/usr/share/dotnet/sdk/3.1.401/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets" (previous value: ";/usr/share/dotnet/sdk/3.1.401/NuGet.targets;/usr/share/dotnet/sdk/3.1.401/Current/Microsoft.Common.targets/ImportAfter/Microsoft.TestPlatform.ImportAfter.targets") at /usr/share/dotnet/sdk/3.1.401/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets (18,5)
                   Property reassignment: $(PackageDescription)="Package Description" (previous value: "") at /usr/share/dotnet/sdk/3.1.401/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets (32,5)
                   Property reassignment: $(GenerateNuspecDependsOn)="Build;_LoadPackInputItems; _GetTargetFrameworksOutput; _WalkEachTargetPerFramework; _GetPackageFiles; " (previous value: "_LoadPackInputItems; _GetTargetFrameworksOutput; _WalkEachTargetPerFramework; _GetPackageFiles; ") at /usr/share/dotnet/sdk/3.1.401/Sdks/NuGet.Build.Tasks.Pack/build/NuGet.Build.Tasks.Pack.targets (55,5)

【问题讨论】：

  • 你的 docker 文件与这个有偏差：docs.docker.com/engine/examples/dotnetcore
  • 确实如此，但这不会导致任何有关卡住的dotnet restore 命令的问题。如果它只是失败或其他什么也可以，但该过程只是继续运行而没有任何输出。
  • 你可以为你的命令添加详细信息吗？喜欢dotnet restore --verbosity diagnostic
  • 将其添加到我上面的问题中，很好的提示！

标签： c# .net docker asp.net-core


【解决方案1】：

我认为这个问题缺少WORKDIR /app 指令，我添加了它并 现在它正在工作。好诡异……

https://github.com/dotnet/core/issues/1825

因此，将WORKDIR / 更改为WORKDIR /app 应该可以解决问题。

Core 3.1 文档中的 Docker 文件：https://docs.docker.com/engine/examples/dotnetcore/

VS 生成的典型 Docker 文件如下所示，并使用 Core Debian 映像（我在部署到 OpenShift/Kubernetes 时也使用该映像）。在下面的示例中，我的应用程序名为“WebApplication”。

    #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.

    FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base
    WORKDIR /app
    EXPOSE 80
    EXPOSE 443

    FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
    WORKDIR /src
    COPY ["WebApplication.csproj", ""]
    RUN dotnet restore "./WebApplication.csproj"
    COPY . .
    WORKDIR "/src/."
    RUN dotnet build "WebApplication.csproj" -c Release -o /app/build

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

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

【讨论】：

  • 我一回来就试试，可能需要几个小时。谢谢！如果是这种情况并且推荐使用子文件夹，我想知道为什么dotnet new console 不遵循最佳实践。
  • 是的，哈哈，这实际上是问题所在。但首先，为什么这是一个问题，其次，为什么它在 docker 之外工作？确实很奇怪...感谢您的帮助！
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