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Bug #65863

open

ceph-mixin - CephPGImbalance alert not honoring osd device class

Added by Andrew Mitroshin 12 days ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
% Done:

0%

Source:
Tags:
Backport:
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
Ceph - v18.2.2
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

CephPGImbalance alert expression

abs(
  ((ceph_osd_numpg > 0) - on (cluster,job) group_left avg(ceph_osd_numpg > 0) by (cluster,job)) /
  on (job) group_left avg(ceph_osd_numpg > 0) by (job)
) * on (cluster,ceph_daemon) group_left(hostname) ceph_osd_metadata > 0.30

generates false positive when different device class OSDs significally differs in size and holds data from different crush rulesets.

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