[Rdo-list] question about load balance controller

Hello, I want to put several controllers behind a load balancer (HAProxy or F5). I know the APIs can be load-balanced, but how about the other services, like: 1) nova scheduler; 2) FS for the images of glance services ? I use local disk for storing images of glance. If two glance services are behind VIP, how does it make sure images uploaded to one glance local disk is also known to the other glance ? For nova scheduler, will one scheduler per controller cause any scheduling issue ? Thanks in advance, Xin