1. A method of processing infrastructure metadata information, comprising: collecting infrastructure metadata information about a virtual resource of a virtual cloud, wherein collecting the infrastructure metadata information includes using an Advanced Message Queuing Protocol message, collecting the infrastructure metadata information includes collecting information about the virtual resource, the virtual cloud includes a virtual switch, and the infrastructure metadata information includes information about a plurality of virtualization tiers that the virtual resource belong to, and collecting information about the virtual resource includes collecting from a hypervisor, information about a first tier of the plurality of virtualization tiers pertaining to a physical layer of the virtual resource, collecting information from an infrastructure manager that manages the hypervisor about a second tier of the plurality of virtualization tiers, the information about the second tier includes an identifier of the virtual switch that has been automatically discovered, and collecting information from a cloud manager that manages the infrastructure manager about a third tier of the plurality of virtualization tiers; and updating a storage of infrastructure metadata information using the collected information.