Introduce LOG_LEVEL_OVERRIDES config var (#10808)

simonrw · web-flow · commit cec8fc52273d · 2025-05-29T11:59:04.000+01:00
diff --git a/localstack-core/localstack/config.py b/localstack-core/localstack/config.py
@@ -442,6 +442,9 @@ def in_docker():
 # path to the lambda debug mode configuration file.
 LAMBDA_DEBUG_MODE_CONFIG_PATH = os.environ.get("LAMBDA_DEBUG_MODE_CONFIG_PATH")
 
+# EXPERIMENTAL: allow setting custom log levels for individual loggers
+LOG_LEVEL_OVERRIDES = os.environ.get("LOG_LEVEL_OVERRIDES", "")
+
 # whether to enable debugpy
 DEVELOP = is_env_true("DEVELOP")
 
diff --git a/localstack-core/localstack/logging/setup.py b/localstack-core/localstack/logging/setup.py
@@ -4,6 +4,7 @@
 
 from localstack import config, constants
 
+from ..utils.strings import key_value_pairs_to_dict
 from .format import AddFormattedAttributes, DefaultFormatter
 
 # The log levels for modules are evaluated incrementally for logging granularity,
@@ -81,6 +82,17 @@ def setup_logging_from_config():
         for name, level in trace_internal_log_levels.items():
             logging.getLogger(name).setLevel(level)
 
+    raw_logging_override = config.LOG_LEVEL_OVERRIDES
+    if raw_logging_override:
+        logging_overrides = key_value_pairs_to_dict(raw_logging_override)
+        for logger, level_name in logging_overrides.items():
+            level = getattr(logging, level_name, None)
+            if not level:
+                raise ValueError(
+                    f"Failed to configure logging overrides ({raw_logging_override}): '{level_name}' is not a valid log level"
+                )
+            logging.getLogger(logger).setLevel(level)
+
 
 def create_default_handler(log_level: int):
     log_handler = logging.StreamHandler(stream=sys.stderr)
