Set log levels in Azure Functions by hand for 3rd party libraries (#63)

src/api-service/__app__/onefuzzlib/azure/creds.py

@@ -19,7 +19,7 @@ from memoization import cached
 from msrestazure.azure_active_directory import MSIAuthentication
 from msrestazure.tools import parse_resource_id
 
-from .monkeypatch import allow_more_workers
+from .monkeypatch import allow_more_workers, reduce_logging
 
 
 @cached(ttl=60)
@@ -30,6 +30,7 @@ def get_msi() -> MSIAuthentication:
 @cached(ttl=60)
 def mgmt_client_factory(client_class: Any) -> Any:
     allow_more_workers()
+    reduce_logging()
     try:
         return get_client_from_cli_profile(client_class)
     except CLIError:

src/api-service/__app__/onefuzzlib/azure/monkeypatch.py

@@ -7,6 +7,7 @@ import inspect
 import logging
 
 WORKERS_DONE = False
+REDUCE_LOGGING = False
 
 
 def allow_more_workers() -> None:
@@ -22,3 +23,34 @@ def allow_more_workers() -> None:
                 entry.frame.f_locals["self"]._sync_call_tp._max_workers = 50
 
     WORKERS_DONE = True
+
+
+# TODO: Replace this with a better method for filtering out logging
+# See https://github.com/Azure/azure-functions-python-worker/issues/743
+def reduce_logging() -> None:
+    global REDUCE_LOGGING
+    if REDUCE_LOGGING:
+        return
+
+    to_quiet = [
+        "azure",
+        "cli",
+        "grpc",
+        "concurrent",
+        "oauthlib",
+        "msrest",
+        "opencensus",
+        "urllib3",
+        "requests",
+        "aiohttp",
+        "asyncio",
+        "adal-python",
+    ]
+
+    for name in logging.Logger.manager.loggerDict:  # type: ignore
+        logger = logging.getLogger(name)
+        for prefix in to_quiet:
+            if logger.name.startswith(prefix):
+                logger.level = logging.WARN
+
+    REDUCE_LOGGING = True