[Feature] add ceph endpoints to prometheus

[hugobugomugo]

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Describe the feature

add ceph metrics to the pegaprox prometheus endpoint
ceph includes its own native prometheus module, it just has to be enabled
ceph mgr module enable prometheus (per cluster)

Use Case

more useful information available directly through pegaprox

Alternatives considered

for now, im scraping the ceph nodes directly

How important is this for you?

nice to have

Checklist

• I have searched existing issues and discussions to make sure this hasn't been requested before

[mkellermann97]

Thanks hugobugomugo — sensible ask. Ceph already ships its own mgr Prometheus module, so the work on our side is mostly proxying/merging that exporter into the PegaProx /metrics endpoint, with a per-cluster enable and the usual auth in front of it. I've tracked it on the roadmap — no promises on timing since we build this in our spare time, but it's clean and well-scoped, and your ceph mgr module enable prometheus note is exactly the right starting point. For now, scraping the ceph nodes directly (as you're doing) is a fine interim. If it's something you'd lean on heavily, a sponsor bump at https://opencollective.com/pegaprox helps move scoped features up the list.

— MK