Great question. That should probably go into Cinder's docs and perhaps tooz's as well. The best info is in the source, and probably should be moved into this url: https://docs.openstack.org/developer/tooz/drivers.html#zookeeper Here's the code with the guide: https://github.com/openstack/tooz/blob/master/tooz/drivers/zookeeper.py#L78-L104 So you want something like zookeeper://username:password@primary_host?hosts=other_host;hosts=other_host_2 I've not used it, but my reading of the code suggests that the url above is a decent facsimile of what you should have. Excerpts from zhaowendaoxirudao's message of 2017-03-17 10:38:41 +0800: > > > I want to test cinder-volume A-A with distributed lock, but the sample configure file only provides a FileDriver backend_url. > How can I get the backend_url for other tooz drivers? > > > Thank you! > > > > 发自网易邮箱大师