Add Prometheus metrics related to ScaledObject readiness

[hy00nc]

Proposal

It'd be good to add a new Prometheus metrics in KEDA operator to monitor ScaledObject readiness, for example keda_scaled_object_ready similar to keda_scaled_object_paused.

Use-Case

This will help us monitor the correctness and readiness of the ScaledObject in the cluster.

Is this a feature you are interested in implementing yourself?

No

Anything else?

I'm requesting this because keda_scaled_object_errors doesn't seem to cover some scaled object errors.
To be specific, when we use Prometheus scaler in the ScaledObject, if we have wrong server address and fail to create the Scaler, keda_scaled_object_errors value does not go up. I needed to have some other metrics to catch this kind of situation.

[JorTurFer]

Hello,
Would fixing keda_scaled_object_errors be enough? I think that if there is an error we should report it and this is just a bug

[hy00nc]

Hello @JorTurFer, thank you for the reply. If that's the case, fixing the bug works for me.

[JorTurFer]

I'm checking and I can reproduce the issue, keda_scaled_object_errors doesn't report the value in that case, but in the meantime I can suggest to use keda_scaler_errors as it reports the value correctly. e.g:

keda_scaler_errors{metric="s0-prometheus",namespace="prometheus-test-ns",scaledObject="prometheus-test-so",scaler="prometheusScaler",triggerIndex="0",type="scaledobject"} 6

[hy00nc]

Thanks a lot! 👍