set root log level from zappa log_level

tests/test_wsgi_root_log_level.py

@@ -0,0 +1,57 @@
+import pytest
+import logging
+from zappa.handler import LambdaHandler
+
+"""
+https://github.com/zappa/Zappa/issues/1336
+2024-08-13 @ceturc
+Test that the root logger's level is updated when log_level is set.
+This was Zappa's default behavior prior to 0.59.0.  This test is
+designed to prevent future regressions of logging.
+"""
+
+event = {
+    "body": "",
+    "resource": "/{proxy+}",
+    "requestContext": {},
+    "queryStringParameters": {},
+    "headers": {
+        "Host": "example.com",
+    },
+    "pathParameters": {"proxy": "root-logger"},
+    "httpMethod": "GET",
+    "stageVariables": {},
+    "path": "/root-logger",
+}
+
+
+@pytest.fixture()
+def reset_handler_singleton():
+    """
+    Since the LambdaHandler is a singleton, it must be
+    destroyed before tests for logging changes to take effect.
+    """
+    LambdaHandler._LambdaHandler__instance = None
+    yield
+
+
+def test_wsgi_root_log_level_debug(caplog, reset_handler_singleton):
+    lh = LambdaHandler("tests.test_wsgi_root_log_level_settings_debug")
+    response = lh.handler(event, None)
+    assert response["statusCode"] == 200
+    assert ("root", logging.DEBUG, "debug message") in caplog.record_tuples
+    assert ("root", logging.INFO, "info message") in caplog.record_tuples
+    assert ("root", logging.WARNING, "warning message") in caplog.record_tuples
+    assert ("root", logging.ERROR, "error message") in caplog.record_tuples
+    assert ("root", logging.CRITICAL, "critical message") in caplog.record_tuples
+
+
+def test_wsgi_root_log_level_info(caplog, reset_handler_singleton):
+    lh = LambdaHandler("tests.test_wsgi_root_log_level_settings_info")
+    response = lh.handler(event, None)
+    assert response["statusCode"] == 200
+    assert ("root", logging.DEBUG, "debug message") not in caplog.record_tuples
+    assert ("root", logging.INFO, "info message") in caplog.record_tuples
+    assert ("root", logging.WARNING, "warning message") in caplog.record_tuples
+    assert ("root", logging.ERROR, "error message") in caplog.record_tuples
+    assert ("root", logging.CRITICAL, "critical message") in caplog.record_tuples

tests/test_wsgi_root_log_level_app.py

@@ -0,0 +1,14 @@
+from flask import Flask, request
+import logging
+
+app = Flask(__name__)
+
+
+@app.route("/root-logger", methods=["GET", "POST"])
+def return_request_url():
+    logging.debug("debug message")
+    logging.info("info message")
+    logging.warning("warning message")
+    logging.error("error message")
+    logging.critical("critical message")
+    return ""

tests/test_wsgi_root_log_level_settings_debug.py

@@ -0,0 +1,12 @@
+API_STAGE = "dev"
+APP_FUNCTION = "app"
+APP_MODULE = "tests.test_wsgi_root_log_level_app"
+BINARY_SUPPORT = False
+CONTEXT_HEADER_MAPPINGS = {}
+DEBUG = "True"
+DJANGO_SETTINGS = None
+DOMAIN = "api.example.com"
+ENVIRONMENT_VARIABLES = {}
+LOG_LEVEL = "DEBUG"
+PROJECT_NAME = "wsgi_root_log_level"
+COGNITO_TRIGGER_MAPPING = {}

tests/test_wsgi_root_log_level_settings_info.py

@@ -0,0 +1,12 @@
+API_STAGE = "dev"
+APP_FUNCTION = "app"
+APP_MODULE = "tests.test_wsgi_root_log_level_app"
+BINARY_SUPPORT = False
+CONTEXT_HEADER_MAPPINGS = {}
+DEBUG = "True"
+DJANGO_SETTINGS = None
+DOMAIN = "api.example.com"
+ENVIRONMENT_VARIABLES = {}
+LOG_LEVEL = "INFO"
+PROJECT_NAME = "wsgi_root_log_level"
+COGNITO_TRIGGER_MAPPING = {}

zappa/handler.py

@@ -70,6 +70,11 @@ def __init__(self, settings_name="zappa_settings", session=None):
             if self.settings.LOG_LEVEL:
                 level = logging.getLevelName(self.settings.LOG_LEVEL)
                 logger.setLevel(level)
+                # https://github.com/zappa/Zappa/issues/1336
+                # @ceturc 2024-08-13
+                # Backwards compatibility to set root logger level after 0.59.0
+                root_logger = logging.getLogger()
+                root_logger.setLevel(level)
 
             remote_env = getattr(self.settings, "REMOTE_ENV", None)
             remote_bucket, remote_file = parse_s3_url(remote_env)