Accessing Files with .net on Linux Containers in Windows

Question

I have the following simple app

var fileCount = System.IO.Directory.GetFiles(@"/home/joe").Count();
Console.WriteLine($"Hello,!  There are {fileCount} files.-");

And a dockerfile

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 . ./
RUN dotnet publish HelloDocker   -c Release -o publish

FROM base AS final
COPY --from=build src/publish .
ENTRYPOINT ["dotnet", "HelloDocker.dll"]

I am attempting to run this with variations of the following command based on search results.

docker run -i test:nobase -v c:/temp:/home/joe

but keep getting a System.IO.DirectoryNotFoundException saying that Could not find a part of the path '/home/joe'.

How should the correct path to c:\temp be shared and accessed from my app when running in a container?

Answer 1

docker run arguments before the image name are docker arguments and arguments after the image name become a command for the container, overriding any CMD statements in the image.

A volume mapping is a docker parameter, so it needs to go before the image name like this

docker run -i -v c:/temp:/home/joe test:nobase