Extra headers

[robrich]

Is your feature request related to a problem? Please describe

I'm trying to pipe OTEL data to a SaaS collector. To authenticate to this https endpoint, I must pass in extra headers. How do I do that with this module?

Describe the solution you'd like

The documentation doesn't list a mechanism for setting extra headers. Are these options available and not documented? Or are they unavailable?

Describe alternatives you've considered

I could put an intermediate OTEL collector in my LAN to proxy requests to the SaaS endpoint. This extra infrastructure has additional cost to run though.

Additional context

Looked at the docs on https://nginx.org/en/docs/ngx_otel_module.html and got it nicely integrated. See also https://docs.newrelic.com/docs/opentelemetry/get-started/collector-processing/opentelemetry-collector-processing-intro/