Why is the reference to .NET runtime lost with this dockerfile?-CodePudding

I have a Dockerfile like this:

FROM mcr.microsoft.com/dotnet/runtime:6.0 AS base
WORKDIR /app

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

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

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

but when i want to build and run it with docker build -f Dockerfile -t mytag . && docker run --name myproject mytag i get an error after the build:

You must install or update .NET to run this application.
2022-11-09T15:48:22.642099385Z 
2022-11-09T15:48:22.642104961Z App: /app/Project.dll
2022-11-09T15:48:22.642108153Z Architecture: x64
2022-11-09T15:48:22.642111392Z Framework: 'Microsoft.AspNetCore.App', version '6.0.0' (x64)
2022-11-09T15:48:22.642115860Z .NET location: /usr/share/dotnet/
2022-11-09T15:48:22.642119020Z 
2022-11-09T15:48:22.642122144Z No frameworks were found.

Why is this happening?

CodePudding user response：

The runtime image is meant for console apps. Yours is an ASP.NET app, so you should use the aspnet runtime image instead. Replace

FROM mcr.microsoft.com/dotnet/runtime:6.0 AS base

with

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base