Health check UI is not working (Apple M1 with Docker)

[ChristianWeyer]

I am starting the solution with docker-compose up.

The shop UI works, as well as the services/APIs.
However, when trying to navigate to the health check UI at http://localhost:5107/healthchecks-ui, I get this:

Did anyone ever see this?
Where to best look for errors?

Thanks.

[ChristianWeyer]

BTW: I changed SQL Server to this version, for it to work on M1:
mcr.microsoft.com/azure-sql-edge

[amolenk]

Hi @ChristianWeyer

I can repro this on my M1 Mac Mini

Looking at the container logs of the xabarilcoding/healthchecksui container, I see the following:

Unhandled exception. System.IO.IOException: Function not implemented
   at System.IO.FileSystemWatcher.StartRaisingEvents()
   at System.IO.FileSystemWatcher.StartRaisingEventsIfNotDisposed()
   at System.IO.FileSystemWatcher.set_EnableRaisingEvents(Boolean value)
   at Microsoft.Extensions.FileProviders.Physical.PhysicalFilesWatcher.TryEnableFileSystemWatcher()
   at Microsoft.Extensions.FileProviders.Physical.PhysicalFilesWatcher.CreateFileChangeToken(String filter)
   at Microsoft.Extensions.FileProviders.PhysicalFileProvider.Watch(String filter)
   at Microsoft.Extensions.Configuration.FileConfigurationProvider.<.ctor>b__1_0()
   at Microsoft.Extensions.Primitives.ChangeToken.OnChange(Func`1 changeTokenProducer, Action changeTokenConsumer)
   at Microsoft.Extensions.Configuration.FileConfigurationProvider..ctor(FileConfigurationSource source)
   at Microsoft.Extensions.Configuration.Json.JsonConfigurationSource.Build(IConfigurationBuilder builder)
   at Microsoft.Extensions.Configuration.ConfigurationBuilder.Build()
   at Microsoft.Extensions.Hosting.HostBuilder.BuildAppConfiguration()
   at Microsoft.Extensions.Hosting.HostBuilder.Build()
   at HealthChecks.UI.Image.Program.Main(String[] args) in /src/build/docker-images/HealthChecks.UI.Image/Program.cs:line 13
qemu: uncaught target signal 6 (Aborted) - core dumped

Looks like the container cannot start a file system watcher. I suspect this to be a M1 specific issue.

[ChristianWeyer]

Would it make sense to report this as an issue to the .NET team? @amolenk?

[ChristianWeyer]

FYI @amolenk: docker/for-mac#5328

[ChristianWeyer]

Do you have any idea and/or plans to fix this @amolenk ?

[amolenk]

Hi @ChristianWeyer,

Yes, I'm planning to find a fix for this (my main desktop is a M1 Mac Mini, so I'd really like eShopOnDapr to run smoothly on it 😉 ). However, I'm unable to give an exact date for a fix as I don't have much time at the moment to spend on this project. It'll probably be second half of May.

It's interesting that it's only the xabarilcoding/healthchecksui container that has the issue. The other containers also use .NET app settings with the JSON file configuration provider and don't have the issue. Perhaps a difference in .NET version?
My first try for a fix would be to create a new WebStatus microservice that uses the AspNetCore.Diagnostics.HealthChecks package to incorporate the health dashboard instead of directly using their container image (in fact, this is actually the way it was in the original solution). PR's very welcome 😊

[amolenk]

Created a custom container for health status. Now everything works on M1. Tested by pulling repo on a clean M1 machine and running docker-compose up