Nova has various components that we will install. A representation of the communication flow among the components is shown in the following block diagram:
Nova utilizes other services such as Glance to provide images and Cinder for block volumes, which is also not shown in the block diagram. Nova supports multiple hypervisors such as KVM, Qemu, XenServer, and VMware.
The Nova Compute service is the one that takes care of communication with different hypervisors using virtualization drivers. Each and every supported Hypervisor has a driver associated with it. You can see the drivers and the code associated with these in the nova/nova/virt
directory of the source code. Also, please note that the optional components such as nova-xvpnvncproxy, nova-spicehtml5proxy, or euca tools are not shown in the block diagram.
The block diagram shows the major functional components of Nova, and they can be installed on a single node or multiple nodes as they all communicate using the message...