This is a release candidate for the v1.15.0/v0.38.0 release. That release will include the v1 release of the OpenTelemetry Go metric API and will provide stability guarantees of that API. See our versioning policy for more information about these stability guarantees.

This release drops the compatibility guarantee of Go 1.18.

Added

• Support global MeterProvider in go.opentelemetry.io/otel. (#3818)
  • Use Meter for a metric.Meter from the global metric.MeterProvider.
  • Use GetMeterProivder for a global metric.MeterProvider.
  • Use SetMeterProivder to set the global metric.MeterProvider.

Changed

• Dropped compatibility testing for Go 1.18. The project no longer guarantees support for this version of Go. (#3813)

Fixed

• Handle empty environment variable as it they were not set. (#3764)

Deprecated

• The go.opentelemetry.io/otel/metric/global package is deprecated. Use go.opentelemetry.io/otel instead. (#3818)

Removed

• The deprecated go.opentelemetry.io/otel/metric/unit package is removed. (#3814)