.NET Core 7.0空API在Docker中无法访问问题求助

我基于带Swagger的ASP.NET Core Web API模板创建了空项目，本地HTTP运行完全正常，但用Docker运行时无法访问页面。已暴露80和443端口，通过Visual Studio运行镜像且端口映射正确，访问地址为 https://localhost:49163/swagger。

容器日志信息 #

2023-01-10 11:17:40 info: Microsoft.Hosting.Lifetime[14]
2023-01-10 11:17:40       Now listening on: https://[::]:443
2023-01-10 11:17:40 info: Microsoft.Hosting.Lifetime[14]
2023-01-10 11:17:40       Now listening on: http://[::]:80
2023-01-10 11:17:40 info: Microsoft.Hosting.Lifetime[0]
2023-01-10 11:17:40       Application started. Press Ctrl+C to shut down.
2023-01-10 11:17:40 info: Microsoft.Hosting.Lifetime[0]
2023-01-10 11:17:40       Hosting environment: Development
2023-01-10 11:17:40 info: Microsoft.Hosting.Lifetime[0]
2023-01-10 11:17:40       Content root path: /app

Dockerfile配置 #

FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
WORKDIR /src
COPY ["Test.csproj", "."]
RUN dotnet restore "./Test.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "Test.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "Test.csproj" -c Release -o /app/publish /p:UseAppHost=false

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

排查及解决建议 #

• 检查Swagger环境配置：确认Program.cs中Swagger的启用逻辑，确保没有额外限制（比如仅允许特定IP），即使容器日志显示是Development环境，也需验证代码中是否正确启用Swagger。
• 切换HTTP访问测试：Docker容器内HTTPS证书可能未正确配置，尝试映射容器80端口到本地端口，用http://localhost:xxxx/swagger访问，排查HTTPS配置问题。
• 验证端口映射真实性：执行docker ps命令查看容器实际端口映射，确认本地49163端口确实绑定到容器443端口。
• 容器内部访问测试：进入容器内部，执行curl https://localhost:443/swagger，判断是容器内部服务问题还是外部映射问题。
• 统一发布与运行环境：当前Dockerfile用Release模式发布，本地用Development模式运行，可能存在配置差异。可在发布时指定Development环境，或确保appsettings.Development.json被正确复制到容器中。

内容的提问来源于stack exchange，提问作者D4rWiNS