Call for feedback/ideas for FaaS Metric Collection with Prometheus

[bwplotka]

Hi!

Sorry if creating an issue for this is not the right way, but I can see OpenFaas is recommending Prometheus for metric collection: https://docs.openfaas.com/architecture/metrics/

As the Prometheus community, we are looking for feedback/ideas on how to improve monitoring of the world of Serverless/FaaS. In this thread, I am specifically looking for:

• Existing best practices for using Prometheus for gathering metrics from Serverless/FaaS platforms and functions
• Specific gaps and limitation users might have in these scenarios
• Existing success stories?
• Ideas for improvements.

If you want to help please feel free to respond on prometheus-dev mailing list: https://groups.google.com/g/prometheus-developers/c/FPe0LsTfo2E 🤗

[kevin-lindsay-1]

I can try to give any feedback you'd like, but this seems like it would be better suited for the OpenFaaS Slack than as a GitHub issue. As you can see, probably nobody even looked at this, whereas the Slack group is probably going to get you more visibility.

[adaliszk]

In the recent tag (0.21.3), it seems that there was a change to limit the Prometheus check for the function namespace when getting the list of functions. That is all fine, however, it seems that the gateway_function_invocation_total's function_name no longer has the namespace in its name. This causes the listing call to always return an empty list.

[alexellis]

@adaliszk I don't believe we've met, can you give yourself an introduction please?

In the recent tag (0.21.3), it seems that there was a change to limit the Prometheus check for the function namespace when getting the list of functions. That is all fine, however, it seems that the gateway_function_invocation_total's function_name no longer has the namespace in its name. This causes the listing call to always return an empty list.

Please raise your own issue with a full repro. This is not my understanding, I use this feature regularly and see the steps you're running.

[alexellis]

gateway             1/1     1            1           5h    gateway,faas-netes   ghcr.io/openfaas/gateway:0.21.3,ghcr.io/openfaasltd/faas-netes:0.1.2   app=gateway

[alexellis]

I confirmed with @kevin-lindsay-1 that he is also seeing metrics as expected.

[alexellis]

Hi @bwplotka - please feel free to reach out to me directly via email alex / openfaas / com

Happy to schedule some time to speak to you about this.

Alex

[alexellis]

/lock: resolved