Pluggable Span Exporters

[such283]

Description

Currently, Logfire only exports to its own backend.
Would you accept a PR adding support for custom exporters
(e.g., S3, local file, custom HTTP endpoints)

[samuelcolvin]

We export otel data which is a very widely used open standard, here are docs on how to send data to a custom otel endpoint: https://logfire.pydantic.dev/docs/how-to-guides/alternative-backends/

If you want to store data to s3 etc. you should send data to the otel collector.

The otel collector already has support for many storage backends, including s3 - https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/exporter/awss3exporter/README.md

You can also register a custom span exporter via logfire.configure already.

[alexmojaki]

We have our own docs about S3: https://logfire.pydantic.dev/docs/how-to-guides/otel-collector/otel-collector-overview/#back-up-data-in-aws-s3

For arbitrary exporters, use logfire.configure(additional_span_processors=[SomeSpanProcessor()])

It would be good to have more docs about that.