This release includes the first beta release of the OpenTelemetry Logs Bridge API and SDK for Go.

Overview

Added

• Add example for go.opentelemetry.io/otel/exporters/stdout/stdoutlog. (#5242)
• Add RecordFactory in go.opentelemetry.io/otel/sdk/log/logtest to facilitate testing exporter and processor implementations. (#5258)
• Add RecordFactory in go.opentelemetry.io/otel/log/logtest to facilitate testing bridge implementations. (#5263)
• The count of dropped records from the BatchProcessor in go.opentelemetry.io/otel/sdk/log is logged. (#5276)
• Add metrics in the otel-collector example. (#5283)
• Add the synchronous gauge instrument to go.opentelemetry.io/otel/metric. (#5304)
  • An int64 or float64 synchronous gauge instrument can now be created from a Meter.
  • All implementations of the API (go.opentelemetry.io/otel/metric/noop, go.opentelemetry.io/otel/sdk/metric) are updated to support this instrument.
• Add logs to go.opentelemetry.io/otel/example/dice. (#5349)

Changed

• The Shutdown method of Exporter in go.opentelemetry.io/otel/exporters/stdout/stdouttrace ignores the context cancellation and always returns nil. (#5189)
• The ForceFlush and Shutdown methods of the exporter returned by New in go.opentelemetry.io/otel/exporters/stdout/stdoutmetric ignore the context cancellation and always return nil. (#5189)
• Apply the value length limits to Record attributes in go.opentelemetry.io/otel/sdk/log. (#5230)
• De-duplicate map attributes added to a Record in go.opentelemetry.io/otel/sdk/log. (#5230)
• go.opentelemetry.io/otel/exporters/stdout/stdoutlog won't print timestamps when WithoutTimestamps option is set. (#5241)
• The go.opentelemetry.io/otel/exporters/stdout/stdoutlog exporter won't print AttributeValueLengthLimit and AttributeCountLimit fields now, instead it prints the DroppedAttributes field. (#5272)
• Improved performance in the Stringer implementation of go.opentelemetry.io/otel/baggage.Member by reducing the number of allocations. (#5286)
• Set the start time for last-value aggregates in go.opentelemetry.io/otel/sdk/metric. (#5305)
• The Span in go.opentelemetry.io/otel/sdk/trace will record links without span context if either non-empty TraceState or attributes are provided. (#5315)
• Upgrade all dependencies of go.opentelemetry.io/otel/semconv/v1.24.0 to go.opentelemetry.io/otel/semconv/v1.25.0. (#5374)

Fixed

• Comparison of unordered maps for go.opentelemetry.io/otel/log.KeyValue and go.opentelemetry.io/otel/log.Value. (#5306)
• Fix the empty output of go.opentelemetry.io/otel/log.Value in go.opentelemetry.io/otel/exporters/stdout/stdoutlog. (#5311)
• Split the behavior of Recorder in go.opentelemetry.io/otel/log/logtest so it behaves as a LoggerProvider only. (#5365)
• Fix wrong package name of the error message when parsing endpoint URL in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp. (#5371)
• Identify the Logger returned from the global LoggerProvider in go.opentelemetry.io/otel/log/global with its schema URL. (#5375)

What's Changed

• sdk/log/logtest: Add RecordFactory by @pellared in https://github.com/open-telemetry/opentelemetry-go/pull/5258
• log/logtest: add Record Factory by @dmathieu in https://github.com/open-telemetry/opentelemetry-go/pull/5263
• stdoutlog: Do not print timestamps when WithoutTimestamps is set by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5241
• Add example for stdoutlog by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5242
• Remove context check on stdout exporters by @prasad-shirodkar in https://github.com/open-telemetry/opentelemetry-go/pull/5189
• Fix flaky test TestBufferExporter/Shutdown/ContextCancelled by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5261
• Add otlploggrpc exporter skeleton by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5246
• build(deps): bump lycheeverse/lychee-action from 1.9.3 to 1.10.0 by @dependabot in https://github.com/open-telemetry/opentelemetry-go/pull/5266
• chore: fix function names in comment by @dockercui in https://github.com/open-telemetry/opentelemetry-go/pull/5262
• build(deps): bump go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp from 0.50.0 to 0.51.0 in /example/dice by @dependabot in https://github.com/open-telemetry/opentelemetry-go/pull/5265
• docs: update variable name in documentation by @codeboten in https://github.com/open-telemetry/opentelemetry-go/pull/5270
• Use empty resource when RecordFactory.Resource is nil by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5264
• Truncate and de-duplicate log attribute values by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5230
• Add changelog entry for #5230 by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5277
• docs: Add otlploghttp package in exporters README.md by @arukiidou in https://github.com/open-telemetry/opentelemetry-go/pull/5274
• The stdoutlog exporter prints DroppedAttributes field instead of Limits fields by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5272
• Test scope and resource transforms in otlploghttp by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5278
• Add README template to semconvkit by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5279
• Use docker compose in otel collector example by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5244
• [chore] dependabot updates Sun May 5 15:58:12 UTC 2024 by @opentelemetrybot in https://github.com/open-telemetry/opentelemetry-go/pull/5300
• build(deps): bump codecov/codecov-action from 4.3.0 to 4.3.1 by @dependabot in https://github.com/open-telemetry/opentelemetry-go/pull/5296
• docs: Update Go logs status to alpha in README.md by @arukiidou in https://github.com/open-telemetry/opentelemetry-go/pull/5299
• docs: Add logs exporters in README.md by @arukiidou in https://github.com/open-telemetry/opentelemetry-go/pull/5298
• Use reflect to construct a Record in logtest by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5275
• Fix type error in float64 instrument documentation by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5302
• Fix HistogramConfig documentation by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5301
• feat: opt for concatenation instead of using fmt.Sprintf by @moisesvega in https://github.com/open-telemetry/opentelemetry-go/pull/5286
• Emit attributes slices as their json representation by @dmathieu in https://github.com/open-telemetry/opentelemetry-go/pull/5159
• Refactor exemplars to not use generic argument by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5285
• Upgrade default go verison to 1.22.3 by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5314
• Log records dropped by the BatchProcessor by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5276
• Rename synchronous instrument names in global test by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5303
• chore: Configure Renovate by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5309
• chore(deps): update module github.com/golang/groupcache to v0.0.0-20210331224755-41bb18bfe9da by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5320
• chore(deps): update module google.golang.org/genproto/googleapis/api to v0.0.0-20240506185236-b8a5c65736ae by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5321
• chore(deps): update module gopkg.in/check.v1 to v1.0.0-20201130134442-10cb98267c6c by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5326
• chore(deps): update module google.golang.org/genproto/googleapis/rpc to v0.0.0-20240506185236-b8a5c65736ae by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5325
• fix(deps): update module golang.org/x/exp to v0.0.0-20240506185415-9bf2ced13842 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5327
• chore(deps): update module github.com/prometheus/common to v0.53.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5332
• chore(deps): update module golang.org/x/net to v0.25.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5335
• fix(deps): update module google.golang.org/protobuf to v1.34.1 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5328
• chore(deps): update module github.com/prometheus/procfs to v0.14.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5333
• chore(deps): update module github.com/cespare/xxhash/v2 to v2.3.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5330
• chore(deps): update module github.com/rogpeppe/go-internal to v1.12.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5334
• fix(deps): update module github.com/golangci/golangci-lint to v1.58.1 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5340
• Merge Span.AddLink tests by @perhapsmaple in https://github.com/open-telemetry/opentelemetry-go/pull/5115
• exporters/otlp/otlptrace: fix incorrect documentation by @kevinburkesegment in https://github.com/open-telemetry/opentelemetry-go/pull/5098
• Generate internal/retry in otlploggrpc by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5313
• fix(deps): update module github.com/prometheus/client_golang to v1.19.1 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5341
• chore(deps): update jaegertracing/all-in-one docker tag to v1.57 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5329
• chore(deps): update otel/opentelemetry-collector-contrib docker tag to v0.100.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5337
• chore(deps): update prom/prometheus docker tag to v2.52.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5338
• Move Aneurysm9 to emeritus status by @Aneurysm9 in https://github.com/open-telemetry/opentelemetry-go/pull/5319
• Test metric aggregate times by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5323
• Fix empty log body printed by stdoutlog exporter by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5311
• Record links with empty span context by @amanakin in https://github.com/open-telemetry/opentelemetry-go/pull/5315
• Update RELEASING.md to obtain steps to verify the changes for contrib by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5284
• chore(deps): update module google.golang.org/genproto/googleapis/rpc to v0.0.0-20240509183442-62759503f434 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5345
• chore(deps): update module google.golang.org/genproto/googleapis/api to v0.0.0-20240509183442-62759503f434 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5344
• Support Delta & Cumulative temporality for LastValue aggregates by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5305
• sdk/log: Document how Processor and Exporter interfaces can be extended by @pellared in https://github.com/open-telemetry/opentelemetry-go/pull/5347
• Remove dependabot version updates by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5346
• chore(deps): update module google.golang.org/genproto/googleapis/api to v0.0.0-20240513163218-0867130af1f8 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5350
• chore(deps): update module google.golang.org/genproto/googleapis/rpc to v0.0.0-20240513163218-0867130af1f8 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5351
• chore(deps): update module github.com/prometheus/procfs to v0.15.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5352
• chore(deps): update codecov/codecov-action action to v4.4.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5353
• Add logs to dice example by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5349
• log: Fix comparison of unordered map values by @dmathieu in https://github.com/open-telemetry/opentelemetry-go/pull/5306
• fix(deps): update module google.golang.org/grpc to v1.64.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5354
• Fix logger provider var name in dice example by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5358
• chore(deps): update module google.golang.org/genproto/googleapis/rpc to v0.0.0-20240515191416-fc5f0ca64291 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5362
• chore(deps): update module google.golang.org/genproto/googleapis/api to v0.0.0-20240515191416-fc5f0ca64291 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5361
• chore(deps): update module github.com/grpc-ecosystem/grpc-gateway/v2 to v2.20.0 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5363
• [chore] Fix 2 places in log design doc by @yijiem in https://github.com/open-telemetry/opentelemetry-go/pull/5364
• [chore] Fix wrong type in DESIGN.md by @pellared in https://github.com/open-telemetry/opentelemetry-go/pull/5368
• Add the synchronous gauge to the metric API and SDK by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5304
• Collector example: add metrics by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5283
• Fix package prefix of error in otlploghttp by @XSAM in https://github.com/open-telemetry/opentelemetry-go/pull/5371
• Split log/logtest into a recorder and a logger by @dmathieu in https://github.com/open-telemetry/opentelemetry-go/pull/5365
• Identify logger with schemaURL in global logger provider by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5375
• Update all semconv use to v1.25.0 by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5374
• fix(deps): update module github.com/golangci/golangci-lint to v1.58.2 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5382
• chore(deps): update codecov/codecov-action action to v4.4.1 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5387
• chore(deps): update module google.golang.org/genproto/googleapis/api to v0.0.0-20240520151616-dc85e6b867a5 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5388
• chore(deps): update benchmark-action/github-action-benchmark action to v1.20.3 by @renovate in https://github.com/open-telemetry/opentelemetry-go/pull/5381
• Fix exported instrument kind const value change by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5385
• Release v1.27.0/v0.49.0/v0.3.0 by @MrAlias in https://github.com/open-telemetry/opentelemetry-go/pull/5392

New Contributors

• @prasad-shirodkar made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5189
• @dockercui made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5262
• @arukiidou made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5274
• @moisesvega made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5286
• @renovate made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5309
• @perhapsmaple made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5115
• @amanakin made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5315
• @yijiem made their first contribution in https://github.com/open-telemetry/opentelemetry-go/pull/5364

Full Changelog: https://github.com/open-telemetry/opentelemetry-go/compare/v1.26.0...v1.27.0