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Release v1.6.0/v0.28.0
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@MrAlias MrAlias released this 23 Mar 21:31
· 1365 commits to main since this release
v1.6.0
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MrAlias Tyler Yahn
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Learn about vigilant mode.
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Learn about vigilant mode.

⚠️ Notice ⚠️

This update is a breaking change of the unstable Metrics API.
Code instrumented with the go.opentelemetry.io/otel/metric will need to be modified.

Added

  • Add metrics exponential histogram support.
    New mapping functions have been made available in sdk/metric/aggregator/exponential/mapping for other OpenTelemetry projects to take dependencies on. (#2502)
  • Add Go 1.18 to our compatibility tests. (#2679)
  • Allow configuring the Sampler with the OTEL_TRACES_SAMPLER and OTEL_TRACES_SAMPLER_ARG environment variables. (#2305, #2517)
  • Add the metric/global for obtaining and setting the global MeterProvider. (#2660)

Changed

  • The metrics API has been significantly changed to match the revised OpenTelemetry specification.
    High-level changes include:

    • Synchronous and asynchronous instruments are now handled by independent InstrumentProviders.
      These InstrumentProviders are managed with a Meter.
    • Synchronous and asynchronous instruments are grouped into their own packages based on value types.
    • Asynchronous callbacks can now be registered with a Meter.

    Be sure to check out the metric module documentation for more information on how to use the revised API. (#2587, #2660)

Fixed

  • Fallback to general attribute limits when span specific ones are not set in the environment. (#2675, #2677)
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