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Add OpenMetrics guidance #1154

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justinfoote
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Fixes #600

This PR adds some guidelines for interoperating with OpenMetrics systems.
I have not fully specified the behavior of accepting OpenMetrics metrics -- I've delegated that to the existing design document in the collector's prometheus receiver. I am making the assumption that this is the only place we expect to accept OpenMetrics data into OpenTelemetry, and that their design document is sufficient for now.

I have included guidelines about metric and label renaming when converting OpenTelemetry metrics to OpenMetrics.
I have not included details about the values, or about how many OpenMetrics metrics should be created for each OpenTelemetry aggregation type. I'd love to chat more about the details here before it gets written up.

Changes

  • Add new openmetrics-guidelines.md to metrics semantic conventions.

@justinfoote justinfoote requested a review from a team as a code owner October 29, 2020 16:29
@justinfoote justinfoote requested a review from a team October 29, 2020 16:29
@justinfoote justinfoote requested a review from a team as a code owner October 29, 2020 16:29
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github-actions bot commented Nov 6, 2020

This PR was marked stale due to lack of activity. It will be closed in 7 days.

@github-actions github-actions bot added the Stale label Nov 6, 2020
@yurishkuro
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@jmacd ptal

@github-actions github-actions bot removed the Stale label Nov 7, 2020
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@MrAlias MrAlias left a comment

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This looks like a great start to build from in subsequent PRs. 👍

@SergeyKanzhelev SergeyKanzhelev merged commit 1ebb9e0 into open-telemetry:master Nov 17, 2020
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More prescriptive guidance on metric naming
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