A record of computing resources for a cloud computing environment and an additional cloud computing environment may be maintained. Available computing resources in the cloud computing environment and the additional cloud computing environment may be determinable from the record of computing resources. A request to instantiate a virtual machine in the cloud computing environment may be received. The virtual machine may be instantiated in the additional cloud computing environment in response to determining that the cloud computing environment lacks the available computing resources and inactive reserve resources to support the virtual machine.