Unable to load shared library 'hostfxr' or one of its dependencies on Alpine inside Docker

[bdovaz]

Describe the bug

The bug (+ repro case) is in this repository but we think it has more to do with the dotnet SDK: dotnet/roslynator#1060

Following these steps you are supposed to be able to run any tool installed with dotnet tool install:

https://learn.microsoft.com/en-us/dotnet/core/install/linux-alpine#install-net-7

But the reality is that with Roslynator it doesn't work: https://www.nuget.org/packages/Roslynator.DotNet.Cli

One or more errors occurred. (Unable to load shared library 'hostfxr' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable:
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/hostfxr.so: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/hostfxr.so: No such file or directory
Error loading shared library hostfxr.so: No such file or directory
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostfxr.so: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/libhostfxr.so: No such file or directory
Error loading shared library libhostfxr.so: No such file or directory
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/hostfxr: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/hostfxr: No such file or directory
Error loading shared library hostfxr: No such file or directory
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostfxr: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/libhostfxr: No such file or directory
Error loading shared library libhostfxr: No such file or directory
)
  Inner exception: Unable to load shared library 'hostfxr' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable:

Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/hostfxr.so: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/hostfxr.so: No such file or directory
Error loading shared library hostfxr.so: No such file or directory
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostfxr.so: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/libhostfxr.so: No such file or directory
Error loading shared library libhostfxr.so: No such file or directory
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/hostfxr: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/hostfxr: No such file or directory
Error loading shared library hostfxr: No such file or directory
Error loading shared library /usr/lib/dotnet/shared/Microsoft.NETCore.App/7.0.4/libhostfxr: No such file or directory
Error loading shared library /root/.dotnet/tools/.store/roslynator.dotnet.cli/0.5.0/roslynator.dotnet.cli/0.5.0/tools/net7.0/any/libhostfxr: No such file or directory
Error loading shared library libhostfxr: No such file or directory

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[marcpopMSFT]

CC @vitek-karas @elinor-fung

[vitek-karas]

I'm pretty sure the root cause is described here: microsoft/MSBuildLocator#210
In the SDK this was resolved (As described in the issue above) by passing a variable from the host to the SDK, which then uses it to load the same hostfxr as the host used to start the SDK. Microsoft.Build.Locator should use the same logic.

[YuliiaKovalova]

The issue was addressed in the scope of dotnet/msbuild#9038

You can use the package with the fix https://www.nuget.org/packages/Microsoft.Build.Locator/1.6.1.