Network function energy saving method based on Openstack virtualization

The invention discloses a network function energy-saving method based on Openstack virtualization, which comprises the following steps of: 1, counting the resource consumption of a current cloud data center to obtain the utilization rate of a CPU (Central Processing Unit) and a memory of a virtual host; 2, when the cloud data center receives a batch of tasks S, determining an allocation scheme of each task according to a pre-allocation algorithm to obtain a pre-allocation scheme Tpre and optimality G of the scheme; 3, task allocation is carried out on each task in the task S; 4, continuing to detect the tasks received in the cloud data center, and if a new batch of tasks are received currently, executing the step 2; and if no new task is received currently, waiting for the task. According to the method, the migration algorithm and the scheduling algorithm are used for carefully analyzing different task types, and compared with other NFV energy-saving algorithms, the method has the advantages of higher resourc