Run dotnet 1.1 using docker

Question

I'm trying to run an .NET Core app on my mac. I'm using VS Core and upgraded the project to .NET 1.1. Everything works fine when I run it through VSCode however when I get to run it using Docker it fails.

I do the following steps:

dotnet publish -c Release -o out
docker build -t myApp .

The Dockerfile looks like this:

FROM microsoft/dotnet:1.1.0-preview1-runtime
WORKDIR /service
COPY out ./service/
ENTRYPOINT ["dotnet", "myApp.dll"]

Essentially I'm following the steps from https://github.com/dotnet/dotnet-docker . I'm getting all the time the following error:

Did you mean to run dotnet SDK commands? Please install dotnet SDK from: http://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409

I'm not sure what I am missing here...

I found what happened. My WORKDIR was /service however I was copying everything to ./service/ so when I ran myApp.dll wasn't finding it. A bit of a wrong error message in my opinion. I changed the dockerfile to do: COPY out ./ and everything worked — Carlos Torrecillas
dotnet was probably not seeing the dll you were specifying and assuming you were trying to run one of the SDK commands. — Roman
at the moment, it's also 100% strict on having only "dll" after the first dot in your entrypoint assembly — nik.shornikov

Carlos Torrecillas Carlos Torrecillas · Accepted Answer · 2016-11-07T22:19:17

I changed my dockerfile to have the following COPY statement:

COPY out ./

That then made the entrypoint to work because it was then able to find out myApp.dll. I think the message could be improved here, but that's me assuming that's what happened

Run dotnet 1.1 using docker

1 Answers