bug-1827506: Log backend errors in the Dockerflow health check.

tecken/libdockerflow.py

@@ -3,6 +3,7 @@
 # file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 import json
+import logging
 from pathlib import Path
 
 from django.core import checks
@@ -11,6 +12,9 @@
 from tecken.libstorage import StorageError
 
 
+logger = logging.getLogger("tecken")
+
+
 def check_storage_urls(app_configs, **kwargs):
     errors = []
     for backend in symbol_storage().get_download_backends(False):
@@ -23,6 +27,7 @@ def check_storage_urls(app_configs, **kwargs):
                     )
                 )
         except StorageError as error:
+            logger.exception("Error when testing whether storage backend exists")
             errors.append(
                 checks.Error(
                     f"Connection error: {error}",