如何通过docker通过启动配置文件运行.net核心应用程序

Question

I am using Docker to deploy my ASP.NET Core app to a Linux machine. I have a pretty much default Dockerfile that looks like this:

FROM microsoft/dotnet:sdk AS build-env
WORKDIR /app

# Copy csproj and restore as distinct layers
COPY *.csproj ./
RUN dotnet restore

# Copy everything else and build
COPY . ./
RUN dotnet publish -c Release -o out

# Build runtime image
FROM microsoft/dotnet:aspnetcore-runtime
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "aspnetapp.dll"]

So my point is to be able to build & run different instances of a project with different settings and different launch profiles declared in launchsettings.json . For that I need to use different dockerfiles but there is a question: How do I setup a launch profile?

Docker uses ENTRYPOINT ["dotnet", "aspnetapp.dll"] to launch the app (which seems to be the right thing to do). This string means dotnet command will be executed and according to doumentation seems that there's no way to pass launch profile as argument.

Yes, I know that dotnet run command allows to pass it via --launch-profile <NAME> . But docs say it's not recommended to use just dotnet run and suggest to publish the app the way it's done in the Dockerfile

What is the right thing to do here?

Thanks!

Answer 1

One possible way is to explicitly set all the different environment variables that the launchSettings includes in the Dockerfile . Do you have things other than environmentVariables in the launchSettings.json ?