open-telemetry / open-telemetry/opentelemetry-python-contrib

Prometheus Remote Write exporter names can have consecutive underscores

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Description

    [One more requirement](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/data-model.md#prometheus-compatibility:~:text=the%20_%20character.-,Multiple%20consecutive%20_%20characters%20MUST%20be%20replaced%20with%20a%20single%20_%20character.,-The%20Unit%20of). Feel free to open an issue and either do in a follow up PR or I can mark it up for grabs.

Originally posted by @aabmass in https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1359#discussion_r993970317

The names & labels after going through string sanitization can have consecutive underscores. This can be fixed, but may require some restructure of the code to not clobber the __name__ label.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the Prometheus Remote Write exporter's string-sanitization path and how it handles the __name__ label. Compare the resulting names and labels with the linked Prometheus compatibility requirement; done means consecutive underscores are collapsed without clobbering the __name__ label.

Written by the indexing model from the issue text.

Assessment

Tech stack
prometheus, python
Domain
observability
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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