I plan to build two small-scale data centers. I want to use openstack as the management platform for each data center. The two data centers have a layer 2 connection to each other. Can I migrate virtual machine instances between the two data centers with openstack?

In other words, there are two openstack controllers, for example controllerA and controllerB. Each of them controls several compute nodes/servers. Can I migrate instances from controllerA to controllerB's compute node? Does openstack support such migration? Or what can I do to implement the function?