Resource detectors and `service.instance.id`

[trask]

Hi!

I was working through open-telemetry/semantic-conventions#3860 with @kathiehuang and @Lewis-E and I had a question about a prior discussion in this repo.

It's not clear to me why resource detectors shouldn't record service.instance.id when they have a reasonably appropriate data source such as CONTAINER_APP_REPLICA_NAME on Azure Container Apps or WEBSITE_INSTANCE_ID on Azure App Services.

Could you expand on whether this is a Go SDK limitation or a concern about whether this should be allowed under the specification or semantic conventions? Thanks!

Related:

• [processor/resourcedetection] Add Azure Container Apps resource detector opentelemetry-collector-contrib#49342 (comment)
• fix(detectors/azurecontainerapps): use azure.container_app.instance.id for replica name instead of service.instance.id #9208