Hello Openstack Telemetry Team,

I'm currently working on re-enabling the Openstack Telemetry services for the StarlingX Openstack (STX-O) project. Openstack telemetry was integrated into STX-O long time ago, but it has been disabled for the past few years. Since the last time telemetry was used by STX-O, it seems that important updates happened, including:

Ceilometer API deprecation
Ceilometer Collector deprecation
Panko (event storage) deprecation

My questions are mainly related to the last one (Panko deprecation):

Since Panko is deprecated and there is no actual replacement for event storage [1], is there any other possible telemetry use case to justify keeping the event pipeline enabled and generating data?

Are there any aodh alarming mechanisms that relies on events generated by Ceilometer event pipelines? If so, which "sinks.publishers" should be used to ensure the integration between the Ceilometer event pipeline and the aodh alarm service?

If event pipeline is enabled, what are the publishers currently supported for events?

The current event pipeline configuration (event_pipeline.yaml) in STX-O defines the "sinks.publishers" as "gnocchi://". However, based on Ceilometer doc, it looks like Gnocchi only supports samples/meters, it doesn't support events. Is my interpretation of the documentation correct or does Gnocchi support events and can be really used as a publisher for the event pipeline?

[1] OpenInfra summit Vancouver 23 - Openstack Observability revamped

Thank you in advance for any possible help!

I'm looking forward to getting Openstack telemetry up and running on StarlingX Openstack.

Best regards,

Alex Figueirêdo.