A cloud migration system is described herein that provides capacity management and disaster recovery by detecting peak load conditions and automatically moving computing to another computing resource (and back) and by providing computing across two or more clouds and moving completely to one in the case of a disaster at one site. The system monitors loads within a datacenter and detects a threshold that indicates that the current load is nearing the datacenter's capacity. Upon detecting that the threshold will be reached, the system facilitates an orderly move of at least some datacenter load to another datacenter or cloud-based resources. The system can also be used as a disaster recovery architecture at a datacenter/network level to manage fast workload transition in case of disaster. Thus, the system allows enterprises to build smaller and more efficient datacenters that leverage other resources for rare extra loads.