1. A method for dynamically discovering and adapting resource and relationship information in virtualized computing environments, comprising: receiving, by a discovery manager, a discovery request for a virtual machine image that was created within a virtualized computing environment, wherein the discovery request is generated by a virtual machine monitor that is configured to manage the virtual machine image for a client; in response receiving the discovery request, discovering, using the discovery manager, resource and relationship information for the virtual machine image; in response to receiving an invalidate request for the virtual machine image, invalidating, using the discovery manager, the resource and relationship information for the virtual machine image, wherein the invalidation request is received responsive to deactivation of the virtual machine image in the virtualized computing environment, and wherein the invalidate request is generated by the virtual machine monitor; storing, using the discovery manager, the resource and relationship information in a database; and, in response to the virtual machine monitor initiating migration of the virtual machine image: invalidating the resource and relationship information of the virtual machine image; and in response to completion of the migration of the virtual machine image, the discovery manager discovering the resource and relationship information for the migrated virtual machine image.