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Expand the set of units supported by the prometheus exporter #4374

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merged 4 commits into from
Aug 2, 2023

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dashpole
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@dashpole dashpole commented Jul 26, 2023

Fixes #4372.

We currently have a very small set of units we recognize. Expand it so that we can cover more cases, such as the one pointed out in the issue.

Change the tests to use seconds instead of milliseconds, as we want to ensure that case works correctly.

The set of units is copied from https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/translator/prometheus/normalize_name.go#L19

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codecov bot commented Jul 26, 2023

Codecov Report

Merging #4374 (be87609) into main (2899fcf) will not change coverage.
The diff coverage is 100.0%.

Additional details and impacted files

Impacted file tree graph

@@          Coverage Diff          @@
##            main   #4374   +/-   ##
=====================================
  Coverage   83.4%   83.4%           
=====================================
  Files        184     184           
  Lines      14380   14380           
=====================================
  Hits       11997   11997           
  Misses      2155    2155           
  Partials     228     228           
Files Changed Coverage Δ
exporters/prometheus/exporter.go 82.7% <100.0%> (ø)

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exporters/prometheus/exporter.go Outdated Show resolved Hide resolved
@pellared
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pellared commented Jul 27, 2023

Opportunistic question: Should we add some doc comments to https://pkg.go.dev/go.opentelemetry.io/otel/metric#WithUnit that we recommend using UCUM units?

Related to #4374 (comment)

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MrAlias commented Jul 28, 2023

Opportunistic question: Should we add some doc comments to https://pkg.go.dev/go.opentelemetry.io/otel/metric#WithUnit that we recommend using UCUM units?

Related to #4374 (comment)

Doing so in a separate PR sounds good to me.

dmitryax pushed a commit to open-telemetry/opentelemetry-collector-contrib that referenced this pull request Aug 1, 2023
**Description:**

Discovered during
open-telemetry/opentelemetry-go#4374 (review).

`B` means `bel` in UCUM, so MB is `megabel`, for example. `$` is also
not UCUM.

https://ucum.org/ucum#section-Alphabetic-Index-By-Symbol
@pellared pellared merged commit 528a0cb into open-telemetry:main Aug 2, 2023
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prometheus: unit is not appended to name
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