## Fix OpenTelemetry Logging functionality

litellm/integrations/opentelemetry.py

@@ -227,8 +227,9 @@ def _init_metrics(self, meter_provider):
                 PeriodicExportingMetricReader,
             )
 
+            normalized_endpoint = self._normalize_otel_endpoint(self.config.endpoint, 'metrics')
             _metric_exporter = OTLPMetricExporter(
-                endpoint=self.config.endpoint,
+                endpoint=normalized_endpoint,
                 headers=OpenTelemetry._get_headers_dictionary(self.config.headers),
                 preferred_temporality={Histogram: AggregationTemporality.DELTA},
             )
@@ -268,22 +269,20 @@ def _init_logs(self, logger_provider):
             return
 
         from opentelemetry._logs import set_logger_provider
-        from opentelemetry.exporter.otlp.proto.grpc._log_exporter import OTLPLogExporter
         from opentelemetry.sdk._logs import LoggerProvider as OTLoggerProvider
         from opentelemetry.sdk._logs.export import BatchLogRecordProcessor
 
         # set up log pipeline
         if logger_provider is None:
-            logger_provider = OTLoggerProvider()
+            litellm_resource = _get_litellm_resource()
+            logger_provider = OTLoggerProvider(resource=litellm_resource)
             # Only add OTLP exporter if we created the logger provider ourselves
-            logger_provider.add_log_record_processor(
-                BatchLogRecordProcessor(
-                    OTLPLogExporter(
-                        endpoint=self.config.endpoint,
-                        headers=self._get_headers_dictionary(self.config.headers),
-                    )
+            log_exporter = self._get_log_exporter()
+            if log_exporter:
+                logger_provider.add_log_record_processor(
+                    BatchLogRecordProcessor(log_exporter)  # type: ignore[arg-type]
                 )
-            )
+
         set_logger_provider(logger_provider)
 
     def log_success_event(self, kwargs, response_obj, start_time, end_time):
@@ -658,10 +657,15 @@ def _emit_semantic_logs(self, kwargs, response_obj, span: Span):
         if not self.config.enable_events:
             return
 
-        from opentelemetry._logs import LogRecord, get_logger
+        from opentelemetry._logs import SeverityNumber, get_logger, get_logger_provider
+        from opentelemetry.sdk._logs import LogRecord as SdkLogRecord
 
         otel_logger = get_logger(LITELLM_LOGGER_NAME)
 
+        # Get the resource from the logger provider
+        logger_provider = get_logger_provider()
+        resource = getattr(logger_provider, '_resource', None) or _get_litellm_resource()
+
         parent_ctx = span.get_span_context()
         provider = (kwargs.get("litellm_params") or {}).get(
             "custom_llm_provider", "Unknown"
@@ -676,15 +680,18 @@ def _emit_semantic_logs(self, kwargs, response_obj, span: Span):
             if self.message_logging and msg.get("content"):
                 attrs["gen_ai.prompt"] = msg["content"]
 
-            otel_logger.emit(
-                LogRecord(
-                    attributes=attrs,
-                    body=msg.copy(),
-                    trace_id=parent_ctx.trace_id,
-                    span_id=parent_ctx.span_id,
-                    trace_flags=parent_ctx.trace_flags,
-                )
+            log_record = SdkLogRecord(
+                timestamp=self._to_ns(datetime.now()),
+                trace_id=parent_ctx.trace_id,
+                span_id=parent_ctx.span_id,
+                trace_flags=parent_ctx.trace_flags,
+                severity_number=SeverityNumber.INFO,
+                severity_text="INFO",
+                body=msg.copy(),
+                resource=resource,
+                attributes=attrs,
             )
+            otel_logger.emit(log_record)
 
         # per-choice events
         for idx, choice in enumerate(response_obj.get("choices", [])):
@@ -705,15 +712,18 @@ def _emit_semantic_logs(self, kwargs, response_obj, span: Span):
             if self.message_logging and body_msg.get("content"):
                 body["message"]["content"] = body_msg["content"]
 
-            otel_logger.emit(
-                LogRecord(
-                    attributes=attrs,
-                    body=body,
-                    trace_id=parent_ctx.trace_id,
-                    span_id=parent_ctx.span_id,
-                    trace_flags=parent_ctx.trace_flags,
-                )
+            log_record = SdkLogRecord(
+                timestamp=self._to_ns(datetime.now()),
+                trace_id=parent_ctx.trace_id,
+                span_id=parent_ctx.span_id,
+                trace_flags=parent_ctx.trace_flags,
+                severity_number=SeverityNumber.INFO,
+                severity_text="INFO",
+                body=body,
+                resource=resource,
+                attributes=attrs,
             )
+            otel_logger.emit(log_record)
 
     def _create_guardrail_span(
         self, kwargs: Optional[dict], context: Optional[Context]
@@ -1292,19 +1302,21 @@ def _get_span_processor(self, dynamic_headers: Optional[dict] = None):
                 "OpenTelemetry: intiializing http exporter. Value of OTEL_EXPORTER: %s",
                 self.OTEL_EXPORTER,
             )
+            normalized_endpoint = self._normalize_otel_endpoint(self.OTEL_ENDPOINT, 'traces')
             return BatchSpanProcessor(
                 OTLPSpanExporterHTTP(
-                    endpoint=self.OTEL_ENDPOINT, headers=_split_otel_headers
+                    endpoint=normalized_endpoint, headers=_split_otel_headers
                 ),
             )
         elif self.OTEL_EXPORTER == "otlp_grpc" or self.OTEL_EXPORTER == "grpc":
             verbose_logger.debug(
                 "OpenTelemetry: intiializing grpc exporter. Value of OTEL_EXPORTER: %s",
                 self.OTEL_EXPORTER,
             )
+            normalized_endpoint = self._normalize_otel_endpoint(self.OTEL_ENDPOINT, 'traces')
             return BatchSpanProcessor(
                 OTLPSpanExporterGRPC(
-                    endpoint=self.OTEL_ENDPOINT, headers=_split_otel_headers
+                    endpoint=normalized_endpoint, headers=_split_otel_headers
                 ),
             )
         else:
@@ -1314,6 +1326,145 @@ def _get_span_processor(self, dynamic_headers: Optional[dict] = None):
             )
             return BatchSpanProcessor(ConsoleSpanExporter())
 
+    def _get_log_exporter(self):
+        """
+        Get the appropriate log exporter based on the configuration.
+        """
+        verbose_logger.debug(
+            "OpenTelemetry Logger, initializing log exporter \nself.OTEL_EXPORTER: %s\nself.OTEL_ENDPOINT: %s\nself.OTEL_HEADERS: %s",
+            self.OTEL_EXPORTER,
+            self.OTEL_ENDPOINT,
+            self.OTEL_HEADERS,
+        )
+
+        _split_otel_headers = OpenTelemetry._get_headers_dictionary(self.OTEL_HEADERS)
+
+        # Normalize endpoint for logs - ensure it points to /v1/logs instead of /v1/traces
+        normalized_endpoint = self._normalize_otel_endpoint(self.OTEL_ENDPOINT, 'logs')
+
+        verbose_logger.debug(
+            "OpenTelemetry: Log endpoint normalized from %s to %s",
+            self.OTEL_ENDPOINT,
+            normalized_endpoint,
+        )
+
+        if hasattr(self.OTEL_EXPORTER, "export"):
+            # Custom exporter provided
+            verbose_logger.debug(
+                "OpenTelemetry: Using custom log exporter. Value of OTEL_EXPORTER: %s",
+                self.OTEL_EXPORTER,
+            )
+            return self.OTEL_EXPORTER
+
+        if self.OTEL_EXPORTER == "console":
+            from opentelemetry.sdk._logs.export import ConsoleLogExporter
+            verbose_logger.debug(
+                "OpenTelemetry: Using console log exporter. Value of OTEL_EXPORTER: %s",
+                self.OTEL_EXPORTER,
+            )
+            return ConsoleLogExporter()
+        elif (
+            self.OTEL_EXPORTER == "otlp_http"
+            or self.OTEL_EXPORTER == "http/protobuf"
+            or self.OTEL_EXPORTER == "http/json"
+        ):
+            from opentelemetry.exporter.otlp.proto.http._log_exporter import OTLPLogExporter
+            verbose_logger.debug(
+                "OpenTelemetry: Using HTTP log exporter. Value of OTEL_EXPORTER: %s, endpoint: %s",
+                self.OTEL_EXPORTER,
+                normalized_endpoint,
+            )
+            return OTLPLogExporter(
+                endpoint=normalized_endpoint, headers=_split_otel_headers
+            )
+        elif self.OTEL_EXPORTER == "otlp_grpc" or self.OTEL_EXPORTER == "grpc":
+            from opentelemetry.exporter.otlp.proto.grpc._log_exporter import OTLPLogExporter
+            verbose_logger.debug(
+                "OpenTelemetry: Using gRPC log exporter. Value of OTEL_EXPORTER: %s, endpoint: %s",
+                self.OTEL_EXPORTER,
+                normalized_endpoint,
+            )
+            return OTLPLogExporter(
+                endpoint=normalized_endpoint, headers=_split_otel_headers
+            )
+        else:
+            verbose_logger.warning(
+                "OpenTelemetry: Unknown log exporter '%s', defaulting to console. Supported: console, otlp_http, otlp_grpc",
+                self.OTEL_EXPORTER,
+            )
+            from opentelemetry.sdk._logs.export import ConsoleLogExporter
+            return ConsoleLogExporter()
+
+    def _normalize_otel_endpoint(
+        self,
+        endpoint: Optional[str],
+        signal_type: str
+    ) -> Optional[str]:
+        """
+        Normalize the endpoint URL for a specific OpenTelemetry signal type.
+
+        The OTLP exporters expect endpoints to use signal-specific paths:
+        - traces: /v1/traces
+        - metrics: /v1/metrics
+        - logs: /v1/logs
+
+        This method ensures the endpoint has the correct path for the given signal type.
+
+        Args:
+            endpoint: The endpoint URL to normalize
+            signal_type: The telemetry signal type ('traces', 'metrics', or 'logs')
+
+        Returns:
+            Normalized endpoint URL with the correct signal path
+
+        Examples:
+            _normalize_otel_endpoint("http://collector:4318/v1/traces", "logs")
+            -> "http://collector:4318/v1/logs"
+
+            _normalize_otel_endpoint("http://collector:4318", "traces")
+            -> "http://collector:4318/v1/traces"
+
+            _normalize_otel_endpoint("http://collector:4318/v1/logs", "metrics")
+            -> "http://collector:4318/v1/metrics"
+        """
+        if not endpoint:
+            return endpoint
+
+        # Validate signal_type
+        valid_signals = {'traces', 'metrics', 'logs'}
+        if signal_type not in valid_signals:
+            verbose_logger.warning(
+                "Invalid signal_type '%s' provided to _normalize_otel_endpoint. "
+                "Valid values: %s. Returning endpoint unchanged.",
+                signal_type,
+                valid_signals
+            )
+            return endpoint
+
+        # Remove trailing slash
+        endpoint = endpoint.rstrip('/')
+
+        # Check if endpoint already ends with the correct signal path
+        target_path = f'/v1/{signal_type}'
+        if endpoint.endswith(target_path):
+            return endpoint
+
+        # Replace existing signal path with the target signal path
+        other_signals = valid_signals - {signal_type}
+        for other_signal in other_signals:
+            other_path = f'/v1/{other_signal}'
+            if endpoint.endswith(other_path):
+                endpoint = endpoint.rsplit('/', 1)[0] + f'/{signal_type}'
+                return endpoint
+
+        # No existing signal path found, append the target path
+        if not endpoint.endswith('/v1'):
+            endpoint = endpoint + target_path
+        else:
+            endpoint = endpoint + f'/{signal_type}'
+
+        return endpoint
+
     @staticmethod
     def _get_headers_dictionary(headers: Optional[Union[str, dict]]) -> Dict[str, str]:
         """