[Enhancement]: Monitoring of custom resources

[sebastiangaiser]

Related problem

In https://github.com/strimzi/strimzi-kafka-operator/issues/9802 there was a discussion about how to monitor the state of a custom resources (CR) like KafkaTopic, KafkaUser, ... .

Suggested solution

There was a suggestion to use kube-state-metrics (ksm) to monitor the state of each CR. For deploying the kube-state-metrics, personally I would recommend using the kube-state-metrics Helm chart which is already part of the kube-prometheus-stack (via a sub-chart).

Using ksm relies on the status object of a Kubernetes resource.

Alternatives

No response

Additional context

Flux also handle this via kube-state-metrics.: Flux documentation: https://fluxcd.io/flux/monitoring/custom-metrics/ Flux example repository: https://github.com/fluxcd/flux2-monitoring-example