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Use the following options to alter logging settings.
| Configuration option = Default value | Description | 
|---|---|
| [DEFAULT] | |
| debug=False | (BoolOpt) Print debugging output (set logging level to DEBUG instead of default INFO level). | 
| default_log_levels=amqp=WARN, amqplib=WARN, boto=WARN, qpid=WARN, sqlalchemy=WARN, suds=INFO, oslo.messaging=INFO, iso8601=WARN, requests.packages.urllib3.connectionpool=WARN, urllib3.connectionpool=WARN, websocket=WARN, requests.packages.urllib3.util.retry=WARN, urllib3.util.retry=WARN, keystonemiddleware=WARN, routes.middleware=WARN, stevedore=WARN, taskflow=WARN | (ListOpt) List of logger=LEVEL pairs. | 
| fatal_deprecations=False | (BoolOpt) Enables or disables fatal status of deprecations. | 
| fatal_exception_format_errors=False | (BoolOpt) Make exception message format errors fatal | 
| instance_format="[instance: %(uuid)s] " | (StrOpt) The format for an instance that is passed with the log message. | 
| instance_uuid_format="[instance: %(uuid)s] " | (StrOpt) The format for an instance UUID that is passed with the log message. | 
| log_config_append=None | (StrOpt) The name of a logging configuration file. This file is appended to any existing logging configuration files. For details about logging configuration files, see the Python logging module documentation. | 
| log_date_format=%Y-%m-%d %H:%M:%S | (StrOpt) Format string for %%(asctime)s in log records. Default: %(default)s . | 
| log_dir=None | (StrOpt) (Optional) The base directory used for relative --log-file paths. | 
| log_file=None | (StrOpt) (Optional) Name of log file to output to. If no default is set, logging will go to stdout. | 
| log_format=None | (StrOpt) DEPRECATED. A logging.Formatter log message format string which may use any of the available logging.LogRecord attributes. This option is deprecated. Please use logging_context_format_string and logging_default_format_string instead. | 
| logging_context_format_string=%(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [%(request_id)s %(user_identity)s] %(instance)s%(message)s | (StrOpt) Format string to use for log messages with context. | 
| logging_debug_format_suffix=%(funcName)s %(pathname)s:%(lineno)d | (StrOpt) Data to append to log format when level is DEBUG. | 
| logging_default_format_string=%(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [-] %(instance)s%(message)s | (StrOpt) Format string to use for log messages without context. | 
| logging_exception_prefix=%(asctime)s.%(msecs)03d %(process)d ERROR %(name)s %(instance)s | (StrOpt) Prefix each line of exception output with this format. | 
| publish_errors=False | (BoolOpt) Enables or disables publication of error events. | 
| syslog_log_facility=LOG_USER | (StrOpt) Syslog facility to receive log lines. | 
| use_ssl=False | (BoolOpt) Enable SSL on the API server | 
| use_stderr=True | (BoolOpt) Log output to standard error. | 
| use_syslog=False | (BoolOpt) Use syslog for logging. Existing syslog format is DEPRECATED and will be changed later to honor RFC5424. | 
| use_syslog_rfc_format=True | (BoolOpt) (Optional) Enables or disables syslog rfc5424 format for logging. If enabled, prefixes the MSG part of the syslog message with APP-NAME (RFC5424). The format without the APP-NAME is deprecated in Kilo, and will be removed in Mitaka, along with this option. | 
| verbose=True | (BoolOpt) If set to false, will disable INFO logging level, making WARNING the default. | 
| [oslo_versionedobjects] | |
| fatal_exception_format_errors=False | (BoolOpt) Make exception message format errors fatal | 


