High Availablity and Scalability Management of VNF

Now network function virtualization(NFV) is growing rapidly and widely adopted by many telcom enterprises. In openstack Tacker takes the responsibility of building a Generic VNF Manager (VNFM) and a NFV Orchestrator (NFVO) to deploy and operate Network Services and Virtual Network Functions (VNFs) on the infrastructure platform. For the VNFs which can work as a loadbalancer or a firewall, Tacker needs to consider the availability of each VNF to ensure they are not overloaded or out of work. To p