Instrumentation libraries support for new HTTP and network attributes

[utpilla]

We have released 1.5.1-beta.1 version of AspNetCore, HttpClient, GrpcNetClient, and SqlClient instrumentation libraries which has the support for emitting the new, frozen (proposed for stable) HTTP and networking attributes as defined in the spec: https://github.com/open-telemetry/semantic-conventions/blob/v1.21.0/docs/http/README.md

• The new HTTP and network semantic conventions can be opted in to by setting the OTEL_SEMCONV_STABILITY_OPT_IN as an environment variable or using a ConfigurationProvider. This allows for a transition period for users to experiment with the new semantic conventions and adapt as necessary. The environment variable supports the following values:
  • http - emit the new, frozen (proposed for stable) HTTP and networking attributes, and stop emitting the old experimental HTTP and networking attributes that the instrumentation emitted previously.
  • http/dup - emit both the old and the frozen (proposed for stable) HTTP and networking attributes, allowing for a more seamless transition.
  • The default behavior (in the absence of one of these values) is to continue emitting the same HTTP and network semantic conventions that were emitted in 1.5.0-beta.1.
  • Note: this option will eventually be removed after the new HTTP and network semantic conventions are marked stable. At which time this instrumentation can receive a stable release, and the old HTTP and network semantic conventions will no longer be supported.