Comment 3 for bug 1516341

@Shannon the HA guide already suggests using a load balancer for keystone (and other API services) in an active-active configuration:

https://docs.openstack.org/ha-guide/controller-ha-haproxy.html

so I'm not sure why you got the impression it was suggesting active/passive. If you can point to the source of the confusion we can try to fix it.

You should also be aware that the HA guide is about to undergo some significant restructuring and improvements which have just been planned here at the PTG:

https://blueprints.launchpad.net/openstack-manuals/+spec/implement-ha-guide-todos
http://specs.openstack.org/openstack/docs-specs/specs/ocata/improve-ha-guide.html
https://etherpad.openstack.org/p/HA_Guide