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docker - 码头集装箱上的 Blazor

问题描述

有人设法在 docker 容器上运行服务器端托管的 Blazor 应用程序吗？

运行它时出现以下异常：

warn: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[35]
      No XML encryptor configured. Key {c1fe0008-8b2b-46a3-9f80-233ae59e5d17} may be persisted to storage in unencrypted form.
crit: Microsoft.AspNetCore.Hosting.Internal.GenericWebHostService[6]
      Application startup exception
System.InvalidOperationException: Could not load the embedded file manifest 'Microsoft.Extensions.FileProviders.Embedded.Manifest.xml' for assembly 'Microsoft.AspNetCore.Components.Server'.
   at Microsoft.Extensions.FileProviders.Embedded.Manifest.ManifestParser.Parse(Assembly assembly, String name)
   at Microsoft.Extensions.FileProviders.ManifestEmbeddedFileProvider..ctor(Assembly assembly)
   at Microsoft.AspNetCore.Components.Server.ConfigureStaticFilesOptions.PostConfigure(String name, StaticFileOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
   at Microsoft.Extensions.Options.OptionsManager`1.<>c__DisplayClass5_0.<Get>b__0()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at System.Lazy`1.get_Value()
   at Microsoft.Extensions.Options.OptionsCache`1.GetOrAdd(String name, Func`1 createOptions)
   at Microsoft.Extensions.Options.OptionsManager`1.Get(String name)
   at Microsoft.Extensions.Options.OptionsManager`1.get_Value()
   at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware..ctor(RequestDelegate next, IWebHostEnvironment hostingEnv, IOptions`1 options, ILoggerFactory loggerFactory)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Extensions.Internal.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
   at Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.<>c__DisplayClass4_0.<UseMiddleware>b__0(RequestDelegate next)
   at Microsoft.AspNetCore.Builder.Internal.ApplicationBuilder.Build()
   at Microsoft.AspNetCore.Hosting.Internal.GenericWebHostService.StartAsync(CancellationToken cancellationToken)

Unhandled Exception: System.InvalidOperationException: Could not load the embedded file manifest 'Microsoft.Extensions.FileProviders.Embedded.Manifest.xml' for assembly 'Microsoft.AspNetCore.Components.Server'.
   at Microsoft.Extensions.FileProviders.Embedded.Manifest.ManifestParser.Parse(Assembly assembly, String name)
   at Microsoft.Extensions.FileProviders.ManifestEmbeddedFileProvider..ctor(Assembly assembly)
   at Microsoft.AspNetCore.Components.Server.ConfigureStaticFilesOptions.PostConfigure(String name, StaticFileOptions options)
   at Microsoft.Extensions.Options.OptionsFactory`1.Create(String name)
   at Microsoft.Extensions.Options.OptionsManager`1.<>c__DisplayClass5_0.<Get>b__0()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at System.Lazy`1.get_Value()
   at Microsoft.Extensions.Options.OptionsCache`1.GetOrAdd(String name, Func`1 createOptions)
   at Microsoft.Extensions.Options.OptionsManager`1.Get(String name)
   at Microsoft.Extensions.Options.OptionsManager`1.get_Value()
   at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware..ctor(RequestDelegate next, IWebHostEnvironment hostingEnv, IOptions`1 options, ILoggerFactory loggerFactory)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Extensions.Internal.ActivatorUtilities.ConstructorMatcher.CreateInstance(IServiceProvider provider)
   at Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, Object[] parameters)
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.<>c__DisplayClass4_0.<UseMiddleware>b__0(RequestDelegate next)
   at Microsoft.AspNetCore.Builder.Internal.ApplicationBuilder.Build()
   at Microsoft.AspNetCore.Hosting.Internal.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
   at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
   at BlazorUI.ServerSided.Program.Main(String[] args) in /src/BlazorUI.ServerSided/Program.cs:line 19

编辑：这是一个干净的项目，由 Visual Studio 在创建新的 ASP.Net Core Web 应用程序 > Blazor（服务器端）时添加。该项目没有进行其他更改。

Dockerfile 是通过选择项目（右键单击）> 添加 > docker 支持来创建的：

FROM mcr.microsoft.com/dotnet/core/aspnet:3.0-stretch-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/core/sdk:3.0-stretch AS build
WORKDIR /src
COPY ["BlazorUI.ServerSided/BlazorUI.ServerSided.csproj", "BlazorUI.ServerSided/"]
RUN dotnet restore "BlazorUI.ServerSided/BlazorUI.ServerSided.csproj"
COPY . .
WORKDIR "/src/BlazorUI.ServerSided"
RUN dotnet build "BlazorUI.ServerSided.csproj" -c Release -o /app

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

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

我正在使用 .net-core 3-preview4-011223 和 linux 容器。

图片在这里发布。

标签： docker.net-coreblazor

解决方案

您在预览版 4 版本中遇到了影响 Linux 构建的众所周知的问题，请参阅https://github.com/aspnet/AspNetCore/issues/9402 Asp.NET 团队声称在预览版 5 中修复该问题

要解决您的问题，您应该使用自 2019 年 5 月 5 日起的每日预览版 5。

您可以从https://github.com/aspnet/AspNetCore/blob/master/docs/DailyBuilds.md获取 Preview5 的构建

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