[QUERY] App Service Application Insights Integration and OTEL UseAzureMonitor() create duplicated telemetry

[RemyBoyer]

Library name and version

Azure.Monitor.OpenTelemetry.AspNetCore 1.2.0

Query/Question

Hello,

We're migrating our ASP.NET Core applications from the Application Insights SDK to OTEL with UseAzureMonitor().

The apps are hosted in Azure App Service and AppInsights instrumentation is enabled on them.

One issue we are facing is that the App Service integration itself pushes all the telemetry items. This leads to all telemetry items being duplicated, with slight differences. Moreover, some requests that we filtered using AspNetCoreTraceInstrumentationOptions.Filter are actually not filtered on Application Insights since being sent by the App Service AppInsights.

Here's an example:

We removed the duplication by disabling the App Service AppInsights integration, but we then lost all the CPU/Memory metrics, and probably other things too.

Is there a way to keep the metrics, but disable other things, like the AppInsights SDK used to do?

Thanks!

Environment

Azure AppService
dotnet --info:

.NET SDK:
 Version:           9.0.102
 Commit:            cb83cd4923
 Workload version:  9.0.100-manifests.43af17c7
 MSBuild version:   17.12.18+ed8c6aec5

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.20348
 OS Platform: Windows
 RID:         win-x86
 Base Path:   C:\Program Files (x86)\dotnet\sdk\9.0.102\

.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.

Host:
  Version:      9.0.1
  Architecture: x86
  Commit:       c8acea2262

.NET SDKs installed:
  1.1.14 [C:\Program Files (x86)\dotnet\sdk]
  2.1.526 [C:\Program Files (x86)\dotnet\sdk]
  2.2.109 [C:\Program Files (x86)\dotnet\sdk]
  3.1.426 [C:\Program Files (x86)\dotnet\sdk]
  5.0.408 [C:\Program Files (x86)\dotnet\sdk]
  6.0.424 [C:\Program Files (x86)\dotnet\sdk]
  6.0.428 [C:\Program Files (x86)\dotnet\sdk]
  7.0.410 [C:\Program Files (x86)\dotnet\sdk]
  8.0.400 [C:\Program Files (x86)\dotnet\sdk]
  8.0.405 [C:\Program Files (x86)\dotnet\sdk]
  9.0.100 [C:\Program Files (x86)\dotnet\sdk]
  9.0.102 [C:\Program Files (x86)\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.30 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.14 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.30 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.14 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.3 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.32 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.32 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.36 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.20 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.8 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.12 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 9.0.0 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 9.0.1 [C:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 1.0.16 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.1.13 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.9 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.30 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.14 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.3 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.32 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.32 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.36 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.20 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.8 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.12 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 9.0.0 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 9.0.1 [C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App]

Other architectures found:
  x64   [C:\Program Files\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x64\InstallLocation]

Environment variables:
  Not set

global.json file:
  Not found

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @rajkumar-rangaraj @TimothyMothra.