[BUG] Activity.Tags not exported to customDimensions about azure-sdk-for-net

[cijothomas]

using Activity? activity = activitySource.CreateActivity("main", ActivityKind.Server);
activity?.Start();
activity?.SetTag("customTag", "customValue");  // should land in custom properties, and is working as expected.
activity?.SetTag("abc", "def"); // should land in custom properties, and is working as expected.
activity?.SetTag("http.user_agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0");  // original value is lost, but a derived value is used to populate client_browser.
activity?.SetTag("http.newconvetiontag", "special value"); // should land in custom properties, and is working as expected.

// older tag conventions
activity?.SetTag("http.method", "GET");  // See below
activity?.SetTag("http.url", "http://0.0.0.0:8080/v1/skus/privateClouds"); // method and url are forming the name
activity?.SetTag("http.status_code", 202); // must be an int, not a string - @rajkumar-rangaraj - is this by design to ignore non-int??

Left comments in above. It looks like some doc improvements are required to explain how the exporter maps tags to AppInsights concepts.

[github-actions]

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

[cataggar]

A related question is how do I set these two values using OpenTelemetry?

[cijothomas]

May be related issues:

#40951
#35487

They are specifically about Resource attributes not being stored into Telemetry tables' customDimensions.

In your case, you are referring to Activity.Tags, right? The following?

Activity.Tags:
    url.full: http://0.0.0.0:8080/v1/skus/privateClouds
    http.response.status_code: 200

url.full could be mapped into RequestTelemetry.url - can you check there?
http.response.status_code could be mapped into RequestTelemetry.responseCode. can you check?

Can you share a minimal repro app?

[cataggar]

It looks like custom properties are indeed set. I was able to set the response code by making sure the value was an int. I did not have luck with url.full, but the older http.url worked only when I set http.method. What still confuses me is why doesn't http.user_agent show up? Here is the minimal repo: https://github.com/cataggar/net44163/blob/365f16210827e7b3edf093d7a0fae8d9338f63de/Program.cs

Activity.TraceId:            4d66de24e6e9c1df6de90727b00423fa
Activity.SpanId:             f44710ae4a38ae80
Activity.TraceFlags:         Recorded
Activity.ActivitySourceName: bug44163
Activity.DisplayName:        main
Activity.Kind:               Server
Activity.StartTime:          2024-05-21T15:27:05.9271900Z
Activity.Duration:           00:00:00.0006631
Activity.Tags:
    customTag: customValue
    abc: def
    http.user_agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0
    http.newconvetiontag: special value
    http.method: GET
    http.url: http://0.0.0.0:8080/v1/skus/privateClouds
    http.status_code: 202
Resource associated with Activity:
    telemetry.sdk.name: opentelemetry
    telemetry.sdk.language: dotnet
    telemetry.sdk.version: 1.8.1
    service.name: unknown_service:net44163

[cataggar]

In the case of http.user_agent, I see client_Browser Firefox 72.0. Is there no way to get the original value. May be just create a custom attirbute?