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support prefix for prometheus exporter#4895

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jpb wants to merge 2 commits intoopen-telemetry:mainfrom
jpb:prom-prefix
Open

support prefix for prometheus exporter#4895
jpb wants to merge 2 commits intoopen-telemetry:mainfrom
jpb:prom-prefix

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@jpb jpb commented Feb 4, 2026

Description

PrometheusMetricReader originally supported providing a prefix that would be added to all metric names. This feature is still present in the documentation but the behaviour was at some point lost.

Type of change

Please delete options that are not relevant.

  • Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

  • Unit tests
  • Tested with private project

Does This PR Require a Contrib Repo Change?

  • Yes. - Link to PR:
  • No.

Checklist:

  • Followed the style guidelines of this project
  • Changelogs have been updated
  • Unit tests have been added
  • Documentation has been updated

@jpb jpb requested a review from a team as a code owner February 4, 2026 22:10
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