Comparison of Pod Collector to PodMonitor about kube-metrics-adapter

[mikkeloscar]

As I understand it, these two concepts are different in the way that PodMonitor is "just" a way to configure prometheus to scrape metrics from pods, while Pod Collector is a way of scraping metrics ONLY for the purpose of autoscaling with the Kubernetes HPA.

Right now Pod Collector only supports JSON, so you can't use it for a pod that exposes metrics in prometheus format.

Assuming the Pod Collector did support prometheus format, then the difference would be that you collect the metrics directly into the Kubernetes HPA infrastructure and let Kubernetes HPA average the metrics across all pods and autoscale based on this. This way you could omit Prometheus if you don't need it for other things.

However, using the PodMonitor for scraping metrics you could aggregate the metrics in prometheus and do much more advanced queries. Queries which you could scale on using the Prometheus Collector.

Hope it make sense.

[mikkeloscar]

I'll close this issue as "answered" :)