add flag to suppress downstream instrumentation

Author: ezhang6811

instrumentation/faraday/lib/opentelemetry/instrumentation/faraday/instrumentation.rb

@@ -28,6 +28,7 @@ class Instrumentation < OpenTelemetry::Instrumentation::Base
 
         option :span_kind, default: :client, validate: %i[client internal]
         option :peer_service, default: nil, validate: :string
+        option :suppress_internal_instrumentation, default: false, validate: :boolean
 
         private
 

instrumentation/faraday/lib/opentelemetry/instrumentation/faraday/middlewares/tracer_middleware.rb

@@ -40,7 +40,13 @@ def call(env)
               ) do |span|
                 OpenTelemetry.propagation.inject(env.request_headers)
 
-                app.call(env).on_complete { |resp| trace_response(span, resp.status) }
+                if config[:suppress_internal_instrumentation]
+                  OpenTelemetry::Common::Utilities.untraced do
+                    app.call(env).on_complete { |resp| trace_response(span, resp.status) }
+                  end
+                else
+                  app.call(env).on_complete { |resp| trace_response(span, resp.status) }
+                end
               rescue ::Faraday::Error => e
                 trace_response(span, e.response[:status]) if e.response