Aspire 9.1 Service returns Unhealthy, but Aspire Dashboard does not reflect the state

[migoldfinger]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

For testing purposes, I changed the code line in the aspire template project from
.AddCheck("self", static () => HealthCheckResult.Healthy(), ["live"]); to
.AddCheck("self", static () => HealthCheckResult.Unhealthy(), ["live"]);

I wanted to know how this would reflect on the Dashboard. To my surprise, all Services are flagged green. If I call the /health or /alive URL the service returns Unhealthy as expected. So how can the Dashboard not show this?

The only thing I could see that happened is that if I call /alive, I see an error log at the service mentioning that it is called in an unhealthy state.

Expected Behavior

The Dashboad sould show the unhealty state of the service.

Steps To Reproduce

Change
.AddCheck("self", static () => HealthCheckResult.Healthy(), ["live"]); to .AddCheck("self", static () => HealthCheckResult.Unhealthy(), ["live"]);

Exceptions (if any)

No response

.NET Version info

.NET SDK:
Version: 9.0.200
Commit: 90e8b202f2
Workload version: 9.0.200-manifests.69179adf
MSBuild version: 17.13.8+cbc39bea8

Laufzeitumgebung:
OS Name: Windows
OS Version: 10.0.26100
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\9.0.200\

Installierte .NET-Workloads:
[aspire]
Installationsquelle: VS 17.13.35825.156
Manifestversion: 8.2.2/8.0.100
Manifestpfad: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.2.2\WorkloadManifest.json
Installationstyp: Msi

[maui-windows]
Installationsquelle: VS 17.13.35825.156
Manifestversion: 9.0.14/9.0.100
Manifestpfad: C:\Program Files\dotnet\sdk-manifests\9.0.100\microsoft.net.sdk.maui\9.0.14\WorkloadManifest.json
Installationstyp: Msi

[wasm-tools]
Installationsquelle: VS 17.13.35825.156
Manifestversion: 9.0.2/9.0.100
Manifestpfad: C:\Program Files\dotnet\sdk-manifests\9.0.100\microsoft.net.workload.mono.toolchain.current\9.0.2\WorkloadManifest.json
Installationstyp: Msi

Konfiguriert für die Verwendung loose manifests beim Installieren neuer Manifeste.

Host:
Version: 9.0.2
Architecture: x64
Commit: 80aa709f5d

.NET SDKs installed:
9.0.200 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Anything else?

No response

[migoldfinger]

???
At least a small hint why this is moved to discussion would be fine.

[davidfowl]

Health checks in the application will not automatically show up in the dashboard. You need to put add the health check in the app host (the app host is the one doing the health checking on your application).

[migoldfinger]

Thanks I finaly found it I needed to add
.WithHttpsHealthCheck("/health");
in the aspire host.
This was kind of well hidden in the documentation. At least I did not find it.
And it is not obvious. Maybe it should be added in the template so that it is obvious.

[davidfowl]

Not a bad idea @DamianEdwards?

cc @davidpine on docs