Nova manages the compute resources, networking, authorization, and scaling for the OpenStack cloud. By itself, it does not perform any virtualization tasks, but rather it uses
libvert APIs to interact with supported hypervisors and is the management component of the system. Nova has an Amazon EC2-compatible RESTful API.
Nova consists of several components:
nova-api—The API server provides an interface to enable outside systems to interact with the cloud infrastructure.
rabbit-mq—The message queue server performs asynchronous calls to communicate with other Nova components, such as the scheduler or the network controller.
nova-compute—The compute nodes’ host instances. They carry out operations based on requests ...