exporting otel metrics via grpc (tonic) using a proxy

[aheusser]

I have been able to successfully export OTEL metrics through an enterprise proxy to an Http OTEL endpoint by creating a MeterProvider using the .with_http_client() member of the HttpExporterBuilder ... where the client has been preconfigured with the proxy to use.

Now I am trying to accomplish a similar goal to a Grpc endpoint. I have basic Grpc exporting working by creating a MeterProvider using the TonicExporterBuilder ... but I cannot find an API-supported way, or any example code, to configure the tonic Grpc client to use and enterprise proxy to communicate with the Grpc OTEL endpoint.

Is this a problem that has already been tackled? Does anyone have an example they can share of how to do it using opentelemetry-rust?

I really want to use Grpc for payload efficiency, but if it is not feasible to optionally configure it to go through an enterprise proxy, then it is going to be of limited utility for me.

Thanks, in advance, for any insights!

[cxw620]

Tonic does not support any proxy offcially and we have to implement a proxy connector manually, see my comment here as an example and try fork and modify codes of opentelemetry-rust, or submit an issue for help.