docker - 无法绑定(bind)到 http ://localhost:5000 on the IPv6 loopback interface: 'Cannot assign requested address' for release version

Question

我正在尝试在本地计算机上的 docker 容器内测试我的应用程序的发布版本，当我启动容器时，我不断收到以下警告，它拒绝了请求:

Unable to bind to http://localhost:5000 on the IPv6 loopback interface: 'Cannot assign requested address'.

我检查过 this post ，这不是问题所在，我也无法找到问题的根本原因。当我提出要求时，他们被拒绝了。该应用程序可以在 Docker 之外正常运行。下面是我的 dotnet publish 命令:

dotnet publish .\Sistema.Cadastro.Api\Sistema.Cadastro.Api.csproj -c Release --runtime linux-musl-x64 --interactive --no-self-contained

发布后，我生成我的容器。下面是我的 Dockerfile

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1
EXPOSE 5000
EXPOSE 5001

COPY System.Cadastro.Api/bin/Release/netcoreapp3.1/linux-musl-x64/publish/ /app
WORKDIR /app
ENTRYPOINT ["dotnet", "Sistema.Cadastro.Api.dll"]

构建容器后，我使用下面的 docker-compose.yaml 启动它:

version: '3'

services:
  siefcadapi:
    container_name: sistemacadapi
    image: localdocker/sistema.cadastro.api:latest
    ports:
        - 5000:5000
        - 5001:5001
    environment:
        - "ASPNETCORE_URLS=https://+:5001;http://+:5000"

下面是生成的日志:

docker-compose -f .\.docker\docker-compose.yaml up
Recreating sistemacadapi ... done
Attaching to sistemacadapi
sistemacadapi    | warn: Microsoft.AspNetCore.Server.Kestrel[0]
sistemacadapi    |       Unable to bind to http://localhost:5000 on the IPv6 loopback interface: 'Cannot assign requested address'.
sistemacadapi    | info: Microsoft.Hosting.Lifetime[0]
sistemacadapi    |       Now listening on: http://localhost:5000
sistemacadapi    | info: Microsoft.Hosting.Lifetime[0]
sistemacadapi    |       Application started. Press Ctrl+C to shut down.
sistemacadapi    | info: Microsoft.Hosting.Lifetime[0]
sistemacadapi    |       Hosting environment: Production
sistemacadapi    | info: Microsoft.Hosting.Lifetime[0]
sistemacadapi    |       Content root path: /app

我不需要在容器内部进行调试，也不需要进行任何类似的调试。我只想运行和测试我的应用程序，以便我可以推送到 Azure 在云端运行。

Answer 1

经过2天的挖掘，我发现了问题。一点都不明显。我使用 appsettings.json，并使用模型读取它，并将其注入(inject)到 Startup.cs

的 IConfiguration 中

    var appConfigs = Configuration.GetSection("App").Get<AppConfigs>();

    services.AddSingleton<IConfiguration>(Configuration);

破坏所有内容的是第二行:

    services.AddSingleton<IConfiguration>(Configuration);

根据 this answer , .net core 2之后就不用加了。添加它并没有在调试过程中搞砸，但是一旦它在容器中运行，它就会导致上面列出的错误。我刚刚删除了第二行，应用程序仍然运行良好，并且它在容器内也开始完美运行。

Creating projeto_sistemacadastroapi_1 ... done
Attaching to projeto_sistemacadastroapi_1
sistemacadastroapi_1  | info: Microsoft.Hosting.Lifetime[0]
sistemacadastroapi_1  |       Now listening on: http://[::]:80
sistemacadastroapi_1  | info: Microsoft.Hosting.Lifetime[0]
sistemacadastroapi_1  |       Application started. Press Ctrl+C to shut down.
sistemacadastroapi_1  | info: Microsoft.Hosting.Lifetime[0]
sistemacadastroapi_1  |       Hosting environment: Production
sistemacadastroapi_1  | info: Microsoft.Hosting.Lifetime[0]
sistemacadastroapi_1  |       Content root path: /app