Squash: Add Log Level and Format configuration for autoinstrumentation

Author: jeremydvoss

CHANGELOG.md

@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Refactor `BatchLogRecordProcessor` to simplify code and make the control flow more
   clear ([#4562](https://github.com/open-telemetry/opentelemetry-python/pull/4562/)
   and [#4535](https://github.com/open-telemetry/opentelemetry-python/pull/4535)).
+- Enable configuration of logging format and level in auto-instrumentation
+  ([#4203](https://github.com/open-telemetry/opentelemetry-python/pull/4203))
 
 
 ## Version 1.33.0/0.54b0 (2025-05-09)

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

@@ -47,6 +47,8 @@
     OTEL_EXPORTER_OTLP_TRACES_PROTOCOL,
     OTEL_TRACES_SAMPLER,
     OTEL_TRACES_SAMPLER_ARG,
+    OTEL_PYTHON_LOG_LEVEL,
+    OTEL_PYTHON_LOG_FORMAT,
 )
 from opentelemetry.sdk.metrics import MeterProvider
 from opentelemetry.sdk.metrics.export import (
@@ -89,6 +91,15 @@
 
 _OTEL_SAMPLER_ENTRY_POINT_GROUP = "opentelemetry_traces_sampler"
 
+_OTEL_PYTHON_LOG_LEVEL_BY_NAME = {
+    "notset": logging.NOTSET,
+    "debug": logging.DEBUG,
+    "info": logging.INFO,
+    "warn": logging.WARNING,
+    "warning": logging.WARNING,
+    "error": logging.ERROR,
+}
+
 _logger = logging.getLogger(__name__)
 
 
@@ -132,6 +143,9 @@ def _get_sampler() -> str | None:
 def _get_id_generator() -> str:
     return environ.get(OTEL_PYTHON_ID_GENERATOR, _DEFAULT_ID_GENERATOR)
 
+def _get_log_level() -> int:
+    return _OTEL_PYTHON_LOG_LEVEL_BY_NAME.get(environ.get(OTEL_PYTHON_LOG_LEVEL, "notset").lower().strip(), logging.NOTSET)
+
 
 def _get_exporter_entry_point(
     exporter_name: str, signal_type: Literal["traces", "metrics", "logs"]
@@ -255,11 +269,19 @@ def _init_logging(
     if setup_logging_handler:
         _patch_basic_config()
 
-        # Add OTel handler
+        # Log Handler
+        root_logger = logging.getLogger()
         handler = LoggingHandler(
-            level=logging.NOTSET, logger_provider=provider
+            logger_provider=provider
         )
-        logging.getLogger().addHandler(handler)
+        # Log level
+        if OTEL_PYTHON_LOG_LEVEL in environ:
+            handler.setLevel(_get_log_level())
+        # Log format
+        if OTEL_PYTHON_LOG_FORMAT in environ:
+            log_format = environ.get(OTEL_PYTHON_LOG_FORMAT, logging.BASIC_FORMAT)
+            handler.setFormatter(logging.Formatter(log_format))
+        root_logger.addHandler(handler)
 
 
 def _patch_basic_config():
@@ -470,7 +492,8 @@ class _OTelSDKConfigurator(_BaseConfigurator):
 
     Initializes several crucial OTel SDK components (i.e. TracerProvider,
     MeterProvider, Processors...) according to a default implementation. Other
-    Configurators can subclass and slightly alter this initialization.
+    Configurators can subclass and slightly alter
+     this initialization.
 
     NOTE: This class should not be instantiated nor should it become an entry
     point on the `opentelemetry-sdk` package. Instead, distros should subclass

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

@@ -54,6 +54,22 @@
 Default: "info"
 """
 
+OTEL_PYTHON_LOG_FORMAT = "OTEL_PYTHON_LOG_FORMAT"
+"""
+.. envvar:: OTEL_PYTHON_LOG_FORMAT
+
+The :envvar:`OTEL_PYTHON_LOG_FORMAT` environment variable sets the log format for the OpenTelemetry LoggingHandler's Formatter
+Default: "logging.BASIC_FORMAT"
+"""
+
+OTEL_PYTHON_LOG_LEVEL = "OTEL_PYTHON_LOG_LEVEL"
+"""
+.. envvar:: OTEL_PYTHON_LOG_LEVEL
+
+The :envvar:`OTEL_PYTHON_LOG_LEVEL` environment variable sets the log level for the OpenTelemetry LoggingHandler
+Default: "logging.NOTSET"
+"""
+
 OTEL_TRACES_SAMPLER = "OTEL_TRACES_SAMPLER"
 """
 .. envvar:: OTEL_TRACES_SAMPLER