dotnet restore error inside Docker-Container - permission denied

Question

I used this tutorial to put my asp.net Core Application inside a Docker Container

https://code.visualstudio.com/docs/containers/quickstart-aspnet-core

But get an permission Denied inside the container:

10:39:02  /usr/share/dotnet/sdk/3.1.201/NuGet.targets(124,5): error : Access to the path '/src/obj' is denied. [/src/Lankoon.csproj]
10:39:02  /usr/share/dotnet/sdk/3.1.201/NuGet.targets(124,5): error :   Permission denied [/src/Lankoon.csproj]
10:39:02  The command '/bin/sh -c dotnet restore "./Lankoon.csproj"' returned a non-zero code: 1

I tried it on a Windows10 Machine and also on an Jenkins Build Server, the result is the same.

I don't understand as which user the nuget is running?

Can anyone help?

Answer 1

Add the following line to you dockerfile

USER root

The problem inside my container was that the user was not root and dotnet restore unfortunately need root access.