Report OTLP export status in startup log

lib/datadog/core/diagnostics/environment_logger.rb

@@ -75,7 +75,10 @@ def collect_config!
               tags: tags,
               runtime_metrics_enabled: runtime_metrics_enabled,
               vm: vm,
-              health_metrics_enabled: health_metrics_enabled
+              health_metrics_enabled: health_metrics_enabled,
+              otlp_traces_export_enabled: otlp_traces_export_enabled,
+              otlp_metrics_export_enabled: otlp_metrics_export_enabled,
+              otlp_logs_export_enabled: otlp_logs_export_enabled
             }
           end
 
@@ -159,8 +162,34 @@ def health_metrics_enabled
             !!Datadog.configuration.health_metrics.enabled
           end
 
+          # @return [Boolean] whether the tracer exports traces over OTLP.
+          #   Always false: Ruby exports spans in Datadog's native format and has no OTLP trace exporter.
+          def otlp_traces_export_enabled
+            false
+          end
+
+          # @return [Boolean] whether the tracer exports metrics over OTLP
+          def otlp_metrics_export_enabled
+            !!opentelemetry_settings&.metrics&.enabled
+          end
+
+          # @return [Boolean] whether the tracer exports logs over OTLP
+          def otlp_logs_export_enabled
+            !!opentelemetry_settings&.logs&.enabled
+          end
+
           private
 
+          # The `opentelemetry` settings namespace is registered by core configuration, but access it
+          # defensively so a missing/unregistered namespace defaults to `false` rather than raising.
+          def opentelemetry_settings
+            return unless Datadog.configuration.respond_to?(:opentelemetry)
+
+            Datadog.configuration.opentelemetry
+          rescue
+            nil
+          end
+
           # Outputs "k1:v1,k2:v2,..."
           def hash_serializer(h)
             h.map { |k, v| "#{k}:#{v}" }.join(",")

sig/datadog/core/diagnostics/environment_logger.rbs

@@ -17,7 +17,7 @@ module Datadog
         def self.collect_and_log!: (?Hash[Symbol, untyped]? extra_fields) -> void
       end
       module EnvironmentCollector
-        def self.collect_config!: () -> { date: untyped, os_name: untyped, version: untyped, lang: untyped, lang_version: untyped, env: untyped, service: untyped, dd_version: untyped, debug: untyped, tags: untyped, runtime_metrics_enabled: untyped, vm: untyped, health_metrics_enabled: untyped }
+        def self.collect_config!: () -> { date: untyped, os_name: untyped, version: untyped, lang: untyped, lang_version: untyped, env: untyped, service: untyped, dd_version: untyped, debug: untyped, tags: untyped, runtime_metrics_enabled: untyped, vm: untyped, health_metrics_enabled: untyped, otlp_traces_export_enabled: bool, otlp_metrics_export_enabled: bool, otlp_logs_export_enabled: bool }
 
         def self.date: () -> untyped
         def self.os_name: () -> untyped
@@ -32,8 +32,12 @@ module Datadog
         def self.runtime_metrics_enabled: () -> untyped
         def self.vm: () -> ::String
         def self.health_metrics_enabled: () -> untyped
+        def self.otlp_traces_export_enabled: () -> bool
+        def self.otlp_metrics_export_enabled: () -> bool
+        def self.otlp_logs_export_enabled: () -> bool
 
         private
+        def self.opentelemetry_settings: () -> untyped
         def self.hash_serializer: (untyped h) -> untyped
       end
     end

spec/datadog/core/diagnostics/environment_logger_spec.rb

@@ -17,6 +17,17 @@
     Datadog.configuration.reset!
   end
 
+  # The dev shell may export OTLP-related env vars; clear them so "default"-state
+  # assertions are deterministic regardless of the surrounding environment.
+  around do |example|
+    ClimateControl.modify(
+      "DD_METRICS_OTEL_ENABLED" => nil,
+      "DD_LOGS_OTEL_ENABLED" => nil,
+    ) do
+      example.run
+    end
+  end
+
   describe "#collect_and_log!" do
     include_context "non-development execution environment"
 
@@ -38,6 +49,9 @@
         "runtime_metrics_enabled" => false,
         "vm" => be_a(String),
         "health_metrics_enabled" => false,
+        "otlp_traces_export_enabled" => false,
+        "otlp_metrics_export_enabled" => false,
+        "otlp_logs_export_enabled" => false,
       }
     end
 
@@ -134,7 +148,10 @@
           tags: nil,
           runtime_metrics_enabled: false,
           vm: be_a(String),
-          health_metrics_enabled: false
+          health_metrics_enabled: false,
+          otlp_traces_export_enabled: false,
+          otlp_metrics_export_enabled: false,
+          otlp_logs_export_enabled: false
         )
       end
 
@@ -206,6 +223,30 @@
 
         it { is_expected.to include health_metrics_enabled: true }
       end
+
+      context "with OTLP metrics export enabled" do
+        before { expect(Datadog.configuration.opentelemetry.metrics).to receive(:enabled).and_return(true) }
+
+        it { is_expected.to include otlp_metrics_export_enabled: true }
+      end
+
+      context "with OTLP logs export enabled" do
+        before { expect(Datadog.configuration.opentelemetry.logs).to receive(:enabled).and_return(true) }
+
+        it { is_expected.to include otlp_logs_export_enabled: true }
+      end
+
+      context "when the opentelemetry settings namespace is unavailable" do
+        before { allow(Datadog.configuration).to receive(:respond_to?).with(:opentelemetry).and_return(false) }
+
+        it do
+          is_expected.to include(
+            otlp_traces_export_enabled: false,
+            otlp_metrics_export_enabled: false,
+            otlp_logs_export_enabled: false,
+          )
+        end
+      end
     end
   end
 end