OpenStack: Building a Cloud Environment

Troubleshooting Horizon

Horizon being a Django application follows the standard Django logging model. The configuration of logging is set in the /etc/openstack_dashboard/local_settings.py file; if we have to modify the logging levels, we need to look at the logger_root and handler_file section of file/etc/keystone/logging.conf.

Let's take a look at the different logging levels for both standard OpenStack services and Horizon in escalating levels of severity:

Logging levels	OpenStack standard	Horizon
DEBUG	Yes	Yes
INFO	Yes	Yes
AUDIT	Yes	No
WARNING	Yes	Yes
ERROR	Yes	Yes
CRITICAL	Yes	Yes
TRACE	Yes	No

When we set the logging levels to DEBUG, all the different messages are logged; when we set the logging level ...