prometheus operator v0.93.1

ScrapeConfig.spec.relabelings[].sourceLabels[]

LabelName is a valid Prometheus label name. For Prometheus 3.x, a label name is valid if it contains UTF-8 characters. For Prometheus 2.x, a label name is only valid if it contains ASCII characters, letters, numbers, as well as underscores.

ScrapeConfig.spec.relabelings[].sourceLabels[] fields and descriptions
Field / Type	Description
ScrapeConfig.spec.relabelings[].sourceLabels[] `string`	LabelName is a valid Prometheus label name. For Prometheus 3.x, a label name is valid if it contains UTF-8 characters. For Prometheus 2.x, a label name is only valid if it contains ASCII characters, letters, numbers, as well as underscores.