Installing "ceph-exporter" Daemon

[ikogan]

According to the ceph documentation, at least as of Reef, the mgrs no longer export perf counters by default (https://docs.ceph.com/en/reef/mgr/prometheus/#id1) which I thought wouldn't be a big deal for me. However, some of these counters include OSD storage information, in particular ceph_osd_stat_bytes and ceph_osd_stat_bytes_used are used to calculate alerts around OSDs becoming NearFull and similar important metrics. Fixing this is easy by simply turning exclude_perf_counters off again:

ceph config set mgr mgr/prometheus/exclude_perf_counters false

This makes those metrics, and many others, come right back. However, according to the docs:

Gathering perf-counters from a single Prometheus exporter can degrade ceph-mgr performance, especially in large clusters. Instead, Ceph- exporter daemons are now used by default for perf-counter gathering. This should only be disabled when no ceph-exporters are deployed.

It doesn't look like Proxmox is deploying these exporters by default and I can't quite figure out how to install them. Are there any tips for this or should I just leave the perf counters enabled?

 

[psarossy]

@ikogan Did you ever get this to work?

 

[ikogan]

No, I'm just taking the performance hit for now.