Visual Studio 2019 - Docker 4.1.1 - 添加容器编排后 Web 应用程序停止工作

Question

这有点奇怪。在 Visual Studio 2019 中添加 docker 编排后，我的 Web 应用程序立即停止工作。这些是我正在采取的确切步骤：

1. 启动 Visual Studio 2019 (16.11.3)
2. 创建新项目
3. 选择“ASP.NET Core Web App”，点击下一步
4. 接受默认项目名称和位置，然后单击下一步
5. 指定，目标框架为 .NET 5.0（当前），身份验证类型：个人帐户，选中为 HTTPS 配置复选框。目前我没有检查启用泊坞窗和启用剃刀运行时。点击创建
6. 在欢迎屏幕上单击 Connected services，然后在 Secrets.json（本地）上进行配置（完成，关闭）
7. 右键单击我的项目，添加容器编排支持
8. 选择“Docker Compose”作为编排器，选择linux作为目标操作系统
9. Visual Studio 似乎为解决方案创建了一个 docker-compose 项目，并为该项目创建了一些 dockerfile。输出还显示容器正在构建中，并最终表明它们已准备就绪。

但是我的 docker 桌面以这种状态显示它们

错误显示如下

该错误的文本显示：

warn: Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository[60]

      Storing keys in a directory '/root/.aspnet/DataProtection-Keys' that may not be persisted outside of the container. Protected data will be unavailable when container is destroyed.

warn: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[35]

      No XML encryptor configured. Key {a6907c05-45f2-4dc3-93ac-5d59ce2b2873} may be persisted to storage in unencrypted form.

crit: Microsoft.AspNetCore.Server.Kestrel[0]

      Unable to start Kestrel.

      System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date.

      To generate a developer certificate run 'dotnet dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet dev-certs https --trust'.

      For more information on configuring HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.

         at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions, Action`1 configureOptions)

         at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions)

         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context)

         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IEnumerable`1 listenOptions, AddressBindContext context)

         at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.BindAsync(CancellationToken cancellationToken)

         at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.StartAsync[TContext](IHttpApplication`1 application, CancellationToken cancellationToken)

Unhandled exception. System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date.

To generate a developer certificate run 'dotnet dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet dev-certs https --trust'.

For more information on configuring HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.

   at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions, Action`1 configureOptions)

   at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions)

   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context)

   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IEnumerable`1 listenOptions, AddressBindContext context)

   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.BindAsync(CancellationToken cancellationToken)

   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.StartAsync[TContext](IHttpApplication`1 application, CancellationToken cancellationToken)

   at Microsoft.AspNetCore.Hosting.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 WebApplication7.Program.Main(String[] args) in /src/WebApplication7/Program.cs:line 16

因为我还没有做任何自定义操作，所以我期待协调器此时只会简单地“工作”，但事实并非如此。

我注意到我的 Trust ASP.NET Core SSL 证书是“提示我”，但我从未收到提示

我也尝试按照错误中的建议进行操作。因此，我按下 docker 桌面上的垃圾桶图标进行编排。然后我如下修改项目内部的 Dockerfile，注意我在入口点之前添加的额外运行。

#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/aspnet:5.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
WORKDIR /src
COPY ["WebApplication7/WebApplication7.csproj", "WebApplication7/"]
RUN dotnet restore "WebApplication7/WebApplication7.csproj"
COPY . .
WORKDIR "/src/WebApplication7"
RUN dotnet build "WebApplication7.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "WebApplication7.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
RUN dotnet dev-certs https
ENTRYPOINT ["dotnet", "WebApplication7.dll"]

我保存文件并重建解决方案，然后按调试/启动按钮 (F5) 进行 docker compose。它说容器又准备好了，但现在没有暴露端口，因此没有浏览到的地方，也没有日志。我可以访问容器的 cli，仅此而已。

我做错了什么？为什么这不仅仅是简单地与 Visual Studio 一起使用 OOB？

如果我从我添加的 Dockerfile 中取出额外的 RUN 行，然后将我的 web 项目设置为启动项目，我可以调试并运行它。但同样，一旦我将 docker-compose 项目设置为启动项目并尝试对其进行调试，我又一次陷入了困境。

Answer 1

在您的项目中转到解决方案资源管理器 > 解决方案 > 属性 > launchsettings.json。 应该有一个 Visual Studio 自动添加的 Docker 部分，如果没有在下面添加 Docker 启动设置。您可以选择您希望应用侦听的端口。

    "Docker": {
      "commandName": "Docker",
      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}",
      "publishAllPorts": true,
      "useSSL": true,
      "DockerfileRunArguments": "add custom arguements here such as --network my-network",
      "httpPort": 5000,
      "sslPort": 5001
    }
  }