.Net 6 Web Api docker 端口转发问题

Question

我有一个安装了 swagger 的空 .NET 6 web api 解决方案。我从 Visual Studio 生成了一个 docker 文件，它看起来像这样：

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["Api.Permissions/Api.Permissions.csproj", "Api.Permissions/"]
COPY ["Api.Permissions.Models/Api.Permissions.Models.csproj", "Api.Permissions.Models/"]
COPY ["Api.Permissions.Services/Api.Permissions.Services.csproj", "Api.Permissions.Services/"]
RUN dotnet restore "Api.Permissions/Api.Permissions.csproj"
COPY . .
WORKDIR "/src/Api.Permissions"
RUN dotnet build "Api.Permissions.csproj" -c Release -o /app/build

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

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

我创建了一个 docker 图片并推送到我的 docker 中心帐户。

然后我有运行这个命令来拉取和运行本地图像：

docker container run -d --name mynewapi -p 8000:443 myusername/myreponame:mycontainername

但是当我浏览到 http://localhost:433/swagger/index.html 我得到：

This site can’t be reached localhost refused to connect.

我也曾尝试使用邮递员向示例端点发出 GET 请求，但我遇到了同样的错误。

我做错了什么？

Answer 1

当您运行容器时，您将容器中的端口 443 映射到主机上的端口 8000。所以你需要使用端口8000访问它。

由于您映射了 443 端口（即 https 端口），因此您应该使用 https。所以你的URL应该是 https://localhost:8000/swagger/index.html

但这还不够。默认情况下，Swagger 仅在您的解决方案处于运行开发模式时可用。您可以使用需要设置为 'Development' 的环境变量 ASPNETCORE_ENVIRONMENT 来控制它。当你运行像这样的容器时，你可以在 docker 命令中执行此操作

docker container run -d --name mynewapi -p 8000:443 -e ASPNETCORE_ENVIRONMENT=Development myusername/myreponame:mycontainername

或者您可以像这样将它添加到 Dockerfile

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
ENV ASPNETCORE_ENVIRONMENT=Development
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["Api.Permissions/Api.Permissions.csproj", "Api.Permissions/"]
COPY ["Api.Permissions.Models/Api.Permissions.Models.csproj", "Api.Permissions.Models/"]
COPY ["Api.Permissions.Services/Api.Permissions.Services.csproj", "Api.Permissions.Services/"]
RUN dotnet restore "Api.Permissions/Api.Permissions.csproj"
COPY . .
WORKDIR "/src/Api.Permissions"
RUN dotnet build "Api.Permissions.csproj" -c Release -o /app/build

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

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

.Net 6 Web Api docker 端口转发问题

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.net-6.0