Clarification on Prometheus built-in remote receive endpoint

[rksakt...@gmail.com]

Hi All,

We have enabled Prometheus remote receive endpoint "--web.enable-remote-write-receiver" in our Prometheus instance and trying OTEL Prometheus remote write exporter to push the data to our Prometheus instance. 

At OTEL/Prometheus end we are not seeing any error even with debug log enable but in Prometheus end we are not receiving those metrics pushed by OTEL.

We checked if the required headers are set and they are predefined in the exporter.

https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/exporter/prometheusremotewriteexporter/exporter.go

Prometheus to Prometheus is working but OTEL Prometheus remote write to actual Prometheus instance is not working.

Is this built-in remote receive endpoint can understand request only for another Prometheus instance ?

OTEL Prometheus remote write exporter - https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter/prometheusremotewriteexporter

Need the advice from the community.

Thank You