Export Exponential Histogram to Managed Prometheus doesn't work due to unimplemented naming convertion

[alexvanboxel]

The Google Managed Prometheus naming doesn't support the pmetric.MetricTypeExponentialHistogram; this makes the export of Exponential Histograms fail.

opentelemetry-operations-go/exporter/collector/googlemanagedprometheus/naming.go

Line 54 in 2160268

default:

I think adding the following will fix the issue. But I don't know what the correct Suffix would be.

	case pmetric.MetricTypeExponentialHistogram:
		return compliantName + "/???", nil

[dashpole]

Thanks @alexvanboxel. We are aware of this, and are coordinating with the Google Managed Prometheus team on adding support for exponential histograms.

[alexvanboxel]

I got it working locally; I've added the above code with /distribution and it works... at least for so far as I see (I can see something in Metrics Explorer. Need more exploration.

[dashpole]

It should work just fine with the regular metrics viewer. I don't believe it will work with promQL yet.