openstack logging configuration file

local_settings.py

# horizon

LOGGING = {
  ...
  'formatters': {
    ...
    'file': {
      'format': '%(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s %(message)s'
    },
  },
  'handlers': {
    ...
    'file': {              
      'level': 'DEBUG',
      'class': 'logging.FileHandler',
      'filename': '/opt/stack/logs/horizon/horizon.log',
      'formatter': 'file',
    },
  },
  'loggers': {
    'foo': {
      'handlers': [..., 'file'],
    }
    }
  }

logging.ini

[DEFAULT]
logging_exception_prefix = %(asctime)s.%(msecs)03d %(process)d TRACE %(name)s %(instance)s
logging_debug_format_suffix = from (pid=%(process)d) %(funcName)s %(pathname)s:%(lineno)d
logging_default_format_string = %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s %(instance)s%(message)s
logging_context_format_string = %(asctime)s.%(msecs)03d %(process)d %(levelname)s %(name)s [%(request_id)s %(project_id)s %(user_id)s] %(instance)s%(message)s