Micrometer + Exemplars: should these work out-of-the-box?

[brunobastosg]

I'm using Quarkus 2.16.4 and trying to send Exemplar data to Prometheus.

I added the extensions quarkus-opentelemetry and quarkus-micrometer-registry-prometheus.

I also started Prometheus with the flag --enable-feature=exemplar-storage.

I make some requests to my app, but when I call /q/metrics, the exemplar data is not showing. The traces are being generated though, as I can see them on log messages and in Jaeger or Tempo.

Was that supposed to work out-of-the-box? Or is some extra configuration needed? I checked the documentation but couldn't find anything.

[quarkus-bot[bot]]

/cc @brunobat (micrometer), @ebullient (micrometer)

[brunobat]

Exemplars support were added to Micrometer quarkus extension on this PR: #28360

[brunobastosg]

Thanks for the reply. I was following that PR. And on the PR it has a 2.16.0.CR1 milestone. So I'm assuming it should be working in 2.16.4.Final.

My question is if it should work just by adding extensions quarkus-opentelemetry and quarkus-micrometer-registry-prometheus. Or does it need some extra config?

[brunobat]

It should, quarkus-micrometer is included in the prometheus registry

[brunobastosg]

I uploaded the project to GitHub at https://github.com/brunobastosg/quarkus-exemplars. I would appreciate it if you could take a look at it when you have the time. No need to rush, I'm just trying out the new features.

[rodrahul]

Hey @brunobastosg any luck getting exemplars working with Quarkus?
I'm having similar issues. I've a sample spring app and a quarkus app, both sending metrics and traces to the same otel collector. I do see exemplars in Prometheus when querying metrics sent by Spring app but nothing from the Quarkus app

[brunobastosg]

No, I couldn't get it working back then so I moved on to other things. When I have the time I'll try again with Quarkus' latest version.