Using constantAttributes with Prometheus metrics exporter

[michaelfig]

I noticed that constantAttributes is typed as MetricOptions.constantAttributes, one of the options when creating a metric:

So, I tried using it:

      const counter = meter.createObservableCounter(
        name,
        { ...options, constantAttributes: new Map([['key1', 'value1'], ['key2', 'value2']]) },
        observableResult => {
          observableResult.observe(lookupStatistic(), {});
        },
      ),

However, looking through the 0.27 version of this repo, I don't see constantAttributes referenced anywhere. Is this just missing some plumbing, or what do I need to do to have those attributes reflected as additional labels in the Prometheus exporter?

[dyladan]

I think the config types come from the API not the SDK. This is being fixed in the SDK rewrite. Currently, there is no constant attributes option in the new version. Is this something you have a need for?

[michaelfig]

So I just need to manually plumb through the entire set of attributes via Histogram.record and ObservableResult.observe?

That's doable.

[dyladan]

Probably