HI, There are two datacenters with two separate installation of openstack that work fine. Every datacenter has 4 compute nodes. Now we want to integrate them, how is it possible? I study (https://wiki.openstack.org/wiki/OpenStack_cascading_solution (https://wiki.openstack.org/wiki/OpenS...)).

It seems, cascading is one way to integrate two datacenters. But actually I need one openstack in two datacenters. Is it possible to change the installation under single keystone?? If yes, then how?