Add native histogram custom values #6687
Draft
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Keeping this draft for now and will mark as ready after I finish all the tests.
What this PR does:
Add Native Histogram Custom Values (NHCB) support to Cortex.
The main change is just adding
custom_values
field to cortex proto. Then Cortex should be able to work out of box for NHCB as almost all NHCB handling logic is done in Prometheus.Note that Prometheus RW v1 doesn't support NHCB yet. And there is a PR to support it. prometheus/prometheus#16354
I am able to ingest NHCB samples via RWv1 with this PR and the Prometheus PR above.
Which issue(s) this PR fixes:
Fixes #6094
Checklist
CHANGELOG.md
updated - the order of entries should be[CHANGE]
,[FEATURE]
,[ENHANCEMENT]
,[BUGFIX]