ASP .NET 6.0 + docker = Failed to bind to address https://[::]:443: address already in use.

Question

I was build service via ASP.NET 6.0 + docker (debian).

No problem was before. All work fine. But at some point the application stopped working and constantly gives an error. And i cant fix it.

if i run app directly in docker then get this error:

   System.IO.IOException" в System.Private.CoreLib.dll: 'Failed to bind to address https://[::]:443: address already in use.
STACK TRACE:
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindEndpointAsync(ListenOptions endpoint, AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.ListenOptions.BindAsync(AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.AnyIPListenOptions.BindAsync(AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IEnumerable`1 listenOptions, AddressBindContext context, CancellationToken cancellationToken)
   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 Microsoft.AspNetCore.Builder.WebApplication.Run(String url)
   at Program.<Main>$(String[] args) in D:\REPO\GptVisualRest\Program.cs:line 30

My docker file:

#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:6.0.1-bullseye-slim AS base
RUN apt update
RUN apt install -y libgdiplus
RUN ln -s /usr/lib/libgdiplus.so /lib/x86_64-linux-gnu/libgdiplus.so
RUN apt-get install -y --no-install-recommends zlib1g fontconfig libfreetype6 libx11-6 libxext6 libxrender1 wget gdebi
RUN wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.stretch_amd64.deb
RUN gdebi --n wkhtmltox_0.12.5-1.stretch_amd64.deb
RUN apt install libssl1.1
RUN ln -s /usr/local/lib/libwkhtmltox.so /usr/lib/libwkhtmltox.so
RUN sed -i'.bak' 's/$/ contrib/' /etc/apt/sources.list
RUN apt-get update; apt-get install -y ttf-mscorefonts-installer fontconfig
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["GptVisualRest.csproj", "."]
RUN dotnet restore "./GptVisualRest.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "GptVisualRest.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "GptVisualRest.csproj" -c Release -o /app/publish /p:UseAppHost=false
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "GptVisualRest.dll"]

lounch settings:

{
  "profiles": {
    "GptVisualRest": {
      "commandName": "Project",
      "launchBrowser": true,
      "launchUrl": "swagger",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "dotnetRunMessages": true,
      "applicationUrl": "https://localhost:7139;http://localhost:5246"
    },
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "launchUrl": "swagger",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "Docker": {
      "commandName": "Docker",
      "launchBrowser": true,
      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/swagger",
      "publishAllPorts": true,
      "useSSL": true
    }
  },
  "$schema": "https://json.schemastore.org/launchsettings.json",
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:64824",
      "sslPort": 44388
    }
  }
}

Project file:

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <UserSecretsId>1459c89d-dc0d-4c9a-be7b-6e4c252482a9</UserSecretsId>
    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
    <DockerfileContext>.</DockerfileContext>
    <OutputType>Exe</OutputType>
  </PropertyGroup>

  <ItemGroup>
    <None Remove="wkhtmltox.dll" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Haukcode.WkHtmlToPdfDotNet" Version="1.5.86" />
    <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
  </ItemGroup>

  <ItemGroup>
    <None Update="Templates\01.xslt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="Templates\02.xslt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="Templates\03.xslt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="Templates\04.xslt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="Templates\05.xslt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="Templates\06.xslt">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
  </ItemGroup>

</Project>

What I've already tried:

• clear and trust ssl certs
• remove conteiner and image
• reinstall docker
• reboot all
• change ports
• check ports inside docker nothing strange.
• try to run app manualy inside docker via "dotnet GptVisualRest.dll" and I get the error I wrote above
• try to override Kestrel port with:

   },
       "AllowedHosts": "*",
       "Kestrel": {
         "EndPoints": {
           "Https": {
             "Url": "https://127.0.0.1:443"
           }
         }
       }

Additional:

Create empty WeatherForecast ASP.NET project and dosn't run in docker too with equal error.

What's wrong???

Answer 1

Hmm, I just made a basic API with Docker and it worked with SSL for me. Are you sure there isn't something else on your computer using port 443?

Edit: nevermind I didn't read the question properly. Sorry :(

Answer 2

shell into the docker container and use netstat to see the process using the port.