💡 [REQUEST] - Add OpenTelemetry Exporter plugin

[skinlayers]

Summary

It would be useful to be able to export SLO reports to OpenTelemetry. I've already done some initial work, but ran into a stumbling block when trying to leverage the existing prometheus exporter as a template. The prometheus exporter creates a Gauge to build the time_series. OpenTelemetry says that prometheus gauges must be converted to OTLP Gauges. Unfortunately, at the moment, OpenTelemetry only supports async gauges, while slo-generator's design calls for a synchronous gauge. I'm currently looking at ways to wrap the async gauge to make it synchronous.

Basic Example

In the case of writing to Grafana Mimir, it would provide a future-facing alternative to pushgateway or remote write. Ideally both grpc and http would be supported.

Screenshots

![DESCRIPTION](LINK.png)

Drawbacks

It would add more code to slo-generator that would need to be maintained.

Unresolved questions

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[lvaylet]

Hi @skinlayers, thanks for suggesting this new exporter. Can you share your existing code, for example in a new Pull Request (PR), so it can be reviewed by external pairs of eyes? Then we can work on the gauges all together.