[otelbot-ruby]

This pull request prepares new releases for the following components:

• opentelemetry-exporter-otlp-metrics 0.15.0 (was 0.14.0)
• opentelemetry-config 0.2.0 (was 0.1.1)
• opentelemetry-metrics-sdk 0.22.0 (was 0.21.0)

For each releasable component, this pull request modifies the version and provides an initial changelog entry based on conventional commit messages. You can edit these changes before merging, to release a different version or to alter the changelog text.

• To confirm this release, merge this pull request, ensuring the "release: pending" label is set. The release script will trigger automatically on merge.
• To abort this release, close this pull request without merging.

The generated changelog entries have been copied below:

---

opentelemetry-exporter-otlp-metrics

• ADDED: Support OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION env var (feat(metrics_sdk): support OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION env var #2389)
• FIXED: Follow HTTP redirects in the OTLP metrics exporter (fix: follow HTTP redirects in the OTLP metrics exporter #2411)

---

opentelemetry-config

• ADDED: Add declarative configuration for logger_provider (feat(config): add declarative configuration for logger_provider #2439)
• ADDED: Substitute environment variables in configuration files (feat(config): substitute environment variables in configuration files #2468)
• FIXED: Correct schema_url unsupported warning (fix(config): correct schema_url unsupported warning #2466)
• FIXED: Parse nullable objects without properties as present (fix(config): parse nullable objects without properties as present #2465)

---

opentelemetry-metrics-sdk

• ADDED: Support OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION env var (feat(metrics_sdk): support OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION env var #2389)

---

# release_metadata DO NOT REMOVE OR MODIFY
{
  "requested_components": {
    "opentelemetry-api": null,
    "opentelemetry-registry": null,
    "opentelemetry-sdk": null,
    "opentelemetry-sdk-experimental": null,
    "opentelemetry-common": null,
    "opentelemetry-exporter-otlp": null,
    "opentelemetry-exporter-otlp-common": null,
    "opentelemetry-exporter-otlp-logs": null,
    "opentelemetry-exporter-otlp-metrics": null,
    "opentelemetry-exporter-zipkin": null,
    "opentelemetry-propagator-b3": null,
    "opentelemetry-propagator-jaeger": null,
    "opentelemetry-semantic_conventions": null,
    "opentelemetry-config": null,
    "opentelemetry-test-helpers": null,
    "opentelemetry-metrics-api": null,
    "opentelemetry-metrics-sdk": null,
    "opentelemetry-logs-api": null,
    "opentelemetry-logs-sdk": null
  },
  "request_sha": "e49ffba9f45ab12fd4fa0acd41e9e9de40026815"
}

[github-actions]

Starting release automation. See https://github.com/open-telemetry/opentelemetry-ruby/actions/runs/39473246314 for execution logs.

[github-actions]

Release job results

• Job started 2026-10-20 18:16:18 UTC
• Job finished 2026-10-20 18:16:52 UTC
• Release SHA: 975b715
• Release pull request: release: Release 3 items #2472
• All releases completed successfully.
• Run logs: https://github.com/open-telemetry/opentelemetry-ruby/actions/runs/39473246314

opentelemetry-exporter-otlp-metrics 0.15.0

• Created release with tag opentelemetry-exporter-otlp-metrics/v0.15.0 on GitHub.
• Rubygems push for opentelemetry-exporter-otlp-metrics 0.15.0.

opentelemetry-config 0.2.0

• Created release with tag opentelemetry-config/v0.2.0 on GitHub.
• Rubygems push for opentelemetry-config 0.2.0.

opentelemetry-metrics-sdk 0.22.0

• Created release with tag opentelemetry-metrics-sdk/v0.22.0 on GitHub.
• Rubygems push for opentelemetry-metrics-sdk 0.22.0.