gistfile1.txt

Traceback (most recent call last):
  File "/usr/bin/nova-null-instance-uuid-scan", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.6/site-packages/nova/db/sqlalchemy/migrate_repo/null_instance_uuid_scan.py", line 90, in main
    scan(opts.delete)
  File "/usr/lib/python2.6/site-packages/nova/db/sqlalchemy/migrate_repo/null_instance_uuid_scan.py", line 69, in scan
    engine = db_api.get_engine()
  File "/usr/lib/python2.6/site-packages/nova/db/sqlalchemy/api.py", line 117, in get_engine
    facade = _create_facade_lazily(use_slave)
  File "/usr/lib/python2.6/site-packages/nova/db/sqlalchemy/api.py", line 104, in _create_facade_lazily
    **dict(CONF.database.iteritems())
  File "/usr/lib/python2.6/site-packages/nova/openstack/common/db/sqlalchemy/session.py", line 873, in __init__
    retry_interval=kwargs.get('retry_interval', 10))
  File "/usr/lib/python2.6/site-packages/nova/openstack/common/db/sqlalchemy/session.py", line 609, in create_engine
    if "sqlite" in connection_dict.drivername:
AttributeError: 'NoneType' object has no attribute 'drivername'