exporters: prometheus: add exponential (native) histogram support #6421
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GiedriusS
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XSAM,
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dmathieu and
pellared
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Signed CLA. |
Codecov ReportAll modified and coverable lines are covered by tests ✅
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## main #6421 +/- ##
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dmathieu
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Mar 10, 2025
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Rebased PR on top of origin/main after #6433. |
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Do we need a documentation update on how to use this? If there is any explicit setup required. |
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Should we document how to set up a view like this? |
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We could possibly update the prometheus example to showcase this. That examples folder is linked on the opentelemetry.io website. |
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If that sounds good to everyone then let me create a pull request to that repo after this is merged |
dmathieu
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dmathieu
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Mar 20, 2025
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Let's merge this? |
I'm excited to get this into the hands of more (internal) developers that use this Go module
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We require two reviews from approvers/maintainers. |
Signed-off-by: Giedrius Statkevičius <[email protected]>
Signed-off-by: Giedrius Statkevičius <[email protected]>
XSAM
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Signed-off-by: Giedrius Statkevičius <[email protected]>
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LGTM. Thanks for your contribution @GiedriusS
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# Overview Closes #6786 ### Added - Add exponential histogram support in `go.opentelemetry.io/otel/exporters/prometheus`. (#6421) - The `go.opentelemetry.io/otel/semconv/v1.31.0` package. The package contains semantic conventions from the `v1.31.0` version of the OpenTelemetry Semantic Conventions. See the [migration documentation](./semconv/v1.31.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.30.0`. (#6479) - Add `Recording`, `Scope`, and `Record` types in `go.opentelemetry.io/otel/log/logtest`. (#6507) - Add `WithHTTPClient` option to configure the `http.Client` used by `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`. (#6751) - Add `WithHTTPClient` option to configure the `http.Client` used by `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`. (#6752) - Add `WithHTTPClient` option to configure the `http.Client` used by `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp`. (#6688) - Add `ValuesGetter` in `go.opentelemetry.io/otel/propagation`, a `TextMapCarrier` that supports retrieving multiple values for a single key. (#5973) - Add `Values` method to `HeaderCarrier` to implement the new `ValuesGetter` interface in `go.opentelemetry.io/otel/propagation`. (#5973) - Update `Baggage` in `go.opentelemetry.io/otel/propagation` to retrieve multiple values for a key when the carrier implements `ValuesGetter`. (#5973) - Add `AssertEqual` function in `go.opentelemetry.io/otel/log/logtest`. (#6662) - The `go.opentelemetry.io/otel/semconv/v1.32.0` package. The package contains semantic conventions from the `v1.32.0` version of the OpenTelemetry Semantic Conventions. See the [migration documentation](./semconv/v1.32.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.31.0`(#6782) - Add `Transform` option in `go.opentelemetry.io/otel/log/logtest`. (#6794) - Add `Desc` option in `go.opentelemetry.io/otel/log/logtest`. (#6796) ### Removed - Drop support for [Go 1.22]. (#6381, #6418) - Remove `Resource` field from `EnabledParameters` in `go.opentelemetry.io/otel/sdk/log`. (#6494) - Remove `RecordFactory` type from `go.opentelemetry.io/otel/log/logtest`. (#6492) - Remove `ScopeRecords`, `EmittedRecord`, and `RecordFactory` types from `go.opentelemetry.io/otel/log/logtest`. (#6507) - Remove `AssertRecordEqual` function in `go.opentelemetry.io/otel/log/logtest`, use `AssertEqual` instead. (#6662) ### Changed -⚠️ Update `github.com/prometheus/client_golang` to `v1.21.1`, which changes the `NameValidationScheme` to `UTF8Validation`. This allows metrics names to keep original delimiters (e.g. `.`), rather than replacing with underscores. This can be reverted by setting `github.com/prometheus/common/model.NameValidationScheme` to `LegacyValidation` in `github.com/prometheus/common/model`. (#6433) - Initialize map with `len(keys)` in `NewAllowKeysFilter` and `NewDenyKeysFilter` to avoid unnecessary allocations in `go.opentelemetry.io/otel/attribute`. (#6455) - `go.opentelemetry.io/otel/log/logtest` is now a separate Go module. (#6465) - `go.opentelemetry.io/otel/sdk/log/logtest` is now a separate Go module. (#6466) - `Recorder` in `go.opentelemetry.io/otel/log/logtest` no longer separately stores records emitted by loggers with the same instrumentation scope. (#6507) - Improve performance of `BatchProcessor` in `go.opentelemetry.io/otel/sdk/log` by not exporting when exporter cannot accept more. (#6569, #6641) ### Deprecated - Deprecate support for `model.LegacyValidation` for `go.opentelemetry.io/otel/exporters/prometheus`. (#6449) ### Fixes - Stop percent encoding header environment variables in `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc` and `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp`. (#6392) - Ensure the `noopSpan.tracerProvider` method is not inlined in `go.opentelemetry.io/otel/trace` so the `go.opentelemetry.io/auto` instrumentation can instrument non-recording spans. (#6456) - Use a `sync.Pool` instead of allocating `metricdata.ResourceMetrics` in `go.opentelemetry.io/otel/exporters/prometheus`. (#6472) --------- Co-authored-by: Tyler Yahn <[email protected]> Co-authored-by: Robert Pająk <[email protected]>
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Almost closes 5777.
Adding native (exponential) histogram support to the Prometheus exporter. I tested it with a toy program, and the result looks good. I added a unit test.