sdk: decouple logs sdk setup from OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED (open-telemetry#4340)

* sdk: decoule logs sdk setup from OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED

Always setup the logs sdk, keep the handler for python logging module
under OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED

Author: xrmx

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Always setup logs sdk, OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED only controls python `logging` module handler setup
+  ([#4340](https://github.com/open-telemetry/opentelemetry-python/pull/4340))
 - Add `attributes` field in `metrics.get_meter` wrapper function
   ([#4364](https://github.com/open-telemetry/opentelemetry-python/pull/4364))
 - Add Python 3.13 support

opentelemetry-sdk/src/opentelemetry/sdk/_configuration/__init__.py

@@ -236,6 +236,7 @@ def _init_metrics(
 def _init_logging(
     exporters: Dict[str, Type[LogExporter]],
     resource: Resource = None,
+    setup_logging_handler: bool = True,
 ):
     provider = LoggerProvider(resource=resource)
     set_logger_provider(provider)
@@ -246,13 +247,15 @@ def _init_logging(
             BatchLogRecordProcessor(exporter_class(**exporter_args))
         )
 
-    handler = LoggingHandler(level=logging.NOTSET, logger_provider=provider)
-
-    logging.getLogger().addHandler(handler)
-
     event_logger_provider = EventLoggerProvider(logger_provider=provider)
     set_event_logger_provider(event_logger_provider)
 
+    if setup_logging_handler:
+        handler = LoggingHandler(
+            level=logging.NOTSET, logger_provider=provider
+        )
+        logging.getLogger().addHandler(handler)
+
 
 def _import_exporters(
     trace_exporter_names: Sequence[str],
@@ -364,7 +367,7 @@ def _initialize_components(
     sampler: Optional[Sampler] = None,
     resource_attributes: Optional[Attributes] = None,
     id_generator: IdGenerator = None,
-    logging_enabled: Optional[bool] = None,
+    setup_logging_handler: Optional[bool] = None,
 ):
     if trace_exporter_names is None:
         trace_exporter_names = []
@@ -401,17 +404,16 @@ def _initialize_components(
         resource=resource,
     )
     _init_metrics(metric_exporters, resource)
-    if logging_enabled is None:
-        logging_enabled = (
+    if setup_logging_handler is None:
+        setup_logging_handler = (
             os.getenv(
                 _OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED, "false"
             )
             .strip()
             .lower()
             == "true"
         )
-    if logging_enabled:
-        _init_logging(log_exporters, resource)
+    _init_logging(log_exporters, resource, setup_logging_handler)
 
 
 class _BaseConfigurator(ABC):

opentelemetry-sdk/src/opentelemetry/sdk/environment_variables/__init__.py

@@ -669,7 +669,7 @@
 .. envvar:: OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED
 
 The :envvar:`OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED` environment variable allows users to
-enable/disable the logging SDK auto instrumentation.
+enable/disable the auto instrumentation for the python logging module.
 Default: False
 
 Note: Logs SDK and its related settings are experimental.

opentelemetry-sdk/tests/test_configurator.py

@@ -17,7 +17,7 @@
 from logging import WARNING, getLogger
 from os import environ
 from typing import Dict, Iterable, Optional, Sequence
-from unittest import TestCase
+from unittest import TestCase, mock
 from unittest.mock import Mock, patch
 
 from pytest import raises
@@ -663,6 +663,32 @@ def test_logging_init_exporter(self):
         getLogger(__name__).error("hello")
         self.assertTrue(provider.processor.exporter.export_called)
 
+    @patch.dict(
+        environ,
+        {"OTEL_RESOURCE_ATTRIBUTES": "service.name=otlp-service"},
+    )
+    def test_logging_init_exporter_without_handler_setup(self):
+        resource = Resource.create({})
+        _init_logging(
+            {"otlp": DummyOTLPLogExporter},
+            resource=resource,
+            setup_logging_handler=False,
+        )
+        self.assertEqual(self.set_provider_mock.call_count, 1)
+        provider = self.set_provider_mock.call_args[0][0]
+        self.assertIsInstance(provider, DummyLoggerProvider)
+        self.assertIsInstance(provider.resource, Resource)
+        self.assertEqual(
+            provider.resource.attributes.get("service.name"),
+            "otlp-service",
+        )
+        self.assertIsInstance(provider.processor, DummyLogRecordProcessor)
+        self.assertIsInstance(
+            provider.processor.exporter, DummyOTLPLogExporter
+        )
+        getLogger(__name__).error("hello")
+        self.assertFalse(provider.processor.exporter.export_called)
+
     @patch.dict(
         environ,
         {"OTEL_RESOURCE_ATTRIBUTES": "service.name=otlp-service"},
@@ -671,8 +697,8 @@ def test_logging_init_exporter(self):
     @patch("opentelemetry.sdk._configuration._init_logging")
     def test_logging_init_disable_default(self, logging_mock, tracing_mock):
         _initialize_components(auto_instrumentation_version="auto-version")
-        self.assertEqual(logging_mock.call_count, 0)
         self.assertEqual(tracing_mock.call_count, 1)
+        logging_mock.assert_called_once_with(mock.ANY, mock.ANY, False)
 
     @patch.dict(
         environ,
@@ -686,7 +712,7 @@ def test_logging_init_disable_default(self, logging_mock, tracing_mock):
     def test_logging_init_enable_env(self, logging_mock, tracing_mock):
         with self.assertLogs(level=WARNING):
             _initialize_components(auto_instrumentation_version="auto-version")
-        self.assertEqual(logging_mock.call_count, 1)
+        logging_mock.assert_called_once_with(mock.ANY, mock.ANY, True)
         self.assertEqual(tracing_mock.call_count, 1)
 
     @patch.dict(
@@ -768,7 +794,7 @@ def test_initialize_components_kwargs(
                 "custom.key.2": "pass-in-value-2",
             },
             "id_generator": "TEST_GENERATOR",
-            "logging_enabled": True,
+            "setup_logging_handler": True,
         }
         _initialize_components(**kwargs)
 
@@ -810,6 +836,7 @@ def test_initialize_components_kwargs(
         logging_mock.assert_called_once_with(
             "TEST_LOG_EXPORTERS_DICT",
             "TEST_RESOURCE",
+            True,
         )