otel4s integrations

[iRevive]

0.5.0 brought significant changes, API improvements, and binary breaking changes.

Looking forward, I hope we will have fewer (or even none) breaking changes in the otel4s-core module.

At this point, I would like to integrate otel4s with more libraries.

There are already a few projects:

• skunk
• http4s-otel4s-middleware

If I'm correct, grackle was also interested in using otel4s directly.

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Please let me know if you have a library candidate you would like to use with otel4s. I can take a look at what we can do :)

[iRevive]

https://github.com/typelevel/fs2-grpc - is a good candidate.

[iRevive]

Related: https://mattlangsenkamp.github.io/posts/otel4s-context-propagation/

[lacarvalho91]

I believe we'd need something like typelevel/fs2-grpc#669 to be able to provide a generic integration with fs2 gRPC

[iRevive]

• Add lambda-otel4s module feral#459

[BVMrs]

hey, is https://fd4s.github.io/fs2-kafka/ a potential candidate? i have a use case where an event crosses boundaries between http and kafka and would like to have it instrumented seamlessly.
please let me know if i can contribute and how.

[iRevive]

It's a great candidate, thanks! I will look into the current implementation, and we can create a proper development plan.

[iRevive]

fs2-kafka is available for Scala 2.12, 2.13, and 3. otel4s is available for 2.13 and 3.

I think we can make pluggable metrics in fs2-kafka and provide a proper implementation only for Scala 2.13 and 3.

There is a similar approach in keypool - https://github.com/typelevel/keypool/pull/396/files#diff-9044cf3e3708279166790373a8ab0916cfcdb8d036df411928e090c5cee7819b.

[iRevive]

https://github.com/typelevel/keypool

[iRevive]

WIP PR - typelevel/keypool#396

[hygt]

Not exactly an integration and this is beyond the scope of the 0.5.0 release, but I'd be interested in a Trace4Cats compatibility layer.
Such thing was relatively straightforward to implement for Natchez as both libraries' internals are similar: https://github.com/trace4cats/trace4cats-natchez

I tried building an Otel4s Tracer backed by Trace4Cats Trace.WithContext but unless I'm missing something, it looks like I'd need to duplicate most of the SdkTracer(Provider) implementation.

[iRevive]

Do you have a minimal example? I can take a look.

[iRevive]

Integration with http4s - https://github.com/http4s/http4s-otel4s-middleware

[iRevive]

Metrics - http4s/http4s-otel4s-middleware#46

[rossabaker]

I'd like to port kafka4s from Natchez to Otel4s at some point: https://github.com/Banno/kafka4s