Telemetry endpoint

[jpds]

What would you like to be added

Prometheus metrics endpoint with some metric examples:

• Latencies observed of HTTP service requests
• Number of HTTP requests seen
• Number of certificates issued
• Number of challenge types observed
• Number of errors encountered issuing certs
• Timestamp for when CAs expire
• Timestamp for when issued certificates expire

[dopey]

• open-telemetry (comment as a reminder)

[dopey]

Hey @jpds, thanks for opening the issue! We agree that step-ca needs a metrics endpoint. A few members on the team mentioned that we might want to implement the metrics in open telemetry format (I believe prometheus can parse that).

We love the idea but unfortunately we don't have time short term to focus on this project. If anyone in the community is interested in contributing, let us know and we'd be happy to have a design discussion. Cheers 🍻

[tashian]

An OpenTelemetry integration could also be a good approach for instrumenting the step client one day, if that's something we would want to reconsider.

[gdbelvin]

Has this been implemented? If so, in what release?

[MCWertGaming]

Hey, is there any update on this?

[dopey]

Hey, apologies for the radio silence. The best update I can give is that this is still on the roadmap, but it's not prioritized.

For context, we have support for this in our product platform and porting support to open source is not a priority at this time. However, priorities change - if this priority changes we will come back here and update.

[hslatman]

Several of the metrics mentioned in the OP are implemented in https://github.com/smallstep/certificates/pull/1669 and will be in the next release.