Not possible to set cloud_RoleName

[maciejo-nordcloud]

Hi,

I tried to set the cloud_RoleName using ITelemetryInitializer but it doesn't work. In App Insights it is still being set as the name of the app service which is hosting it.

public class TelemetryInitializer : ITelemetryInitializer { private static string RoleName = "Modernised.Responses"; public void Initialize(ITelemetry telemetry) { // set custom role name here telemetry.Context.Cloud.RoleName = "Name"; } }

services.AddSingleton<ITelemetryInitializer, TelemetryInitializer>();

Is there any other way to do it?

[fabiocav]

This is not exposed to the worker, as the host is in control of this behavior.

@maciejo-nordcloud can you please expand on your scenario/requirement?

@brettsam is this something we want to add?

[maciejo-nordcloud]

@fabiocav the requirement is to have human-friendly names on Application Map (like in this article)

After downgrading the function to netcoreapp3.1 it works as expected

[fabiocav]

Flagging this for discussion/design.

For clarity, the difference here is not between v3 and v4, but instead, between in-proc and out-of-proc models. One of the potential solutions is to expose a configuration we could use for any of the supported languages, but we need to discuss.

[brettsam]

I think we'll need to look at OpenTelemetry concepts here and see if there's a more general, non-AppInsights, solution. I don't really want to expose some ApplicationInsights-specific setting value only to move onto OpenTelemetry soon.

For now, this value cannot be changed from the host side unless you register your own ITelemetryInitializer in the host via an extension, which isn't a great experience. You'd also have to register one via the worker (if using the new AppInsights worker package: #944 (comment)) in order for the two sets of logs to match.

[jviau]

We will be working on improving observability from the host side. Following OTel semantics, which should cover cloud_RoleName for application insights will be included.

Closing this against that issue: Azure/azure-functions-host#9273