Description of key manager configuration options

Configuration option = Default value	Description
[keymgr]
api_class = cinder.keymgr.conf_key_mgr.ConfKeyManager	(StrOpt) The full class name of the key manager API class
encryption_api_url = http://localhost:9311/v1	(StrOpt) Url for encryption service.
encryption_auth_url = http://localhost:5000/v3	(StrOpt) Authentication url for encryption service.
fixed_key = None	(StrOpt) Fixed key returned by key manager, specified in hex