Research And Implementation Of Openflow-Based Resource Live Migration

With rapid development and wide application of cloud computing technology, especially the IaaS (Infrastructure as a Service), cloud computing platform can easily manage compute, storage and network resources of its own. Virtualization is the key technology in encapsulation of underlying resources. Virtualization of computing resources and virtualization of storage resources has now been maturely developed, but virtualization of network resources is the weak link of virtualization technology. As the most mainstream implementation of SDN (Software Defined Network), OpenFlow technology completely changed the traditional closed network architecture, and it provides a new solution for network virtualization implementation. The combination of cloud computing platform and OpenFlow technologies could provide users with the network virtual topology.Cloud computing platform typically provides live migration of virtual machine resources, but it is now facing to new problems after introducing OpenFlow to provide network virtualization. Problems such as live migration of network resources and virtual machine bringing impact on network topology cannot be solved by directly using the traditional means of solving live migration. In this paper we design a resource live migration system to solve these problems. The system not only provides traditional virtual machine resources, but also provides a virtualized network topology to the user. Normal users of the system do not need to care about the underlying implementation of the resources. When the system administrator changes the position of resources by using live migration function, the system topology remains unchanged to the normal user. Based on OpenStack, The system introduces OpenFlow technology based on Openstack and realized virtual network devices by using OpenFlow switch. Then the system uses the OpenFlow flow table to implement the logical topology of the network, while the live migration operation will not affect the topology of the network. In addition, the system provides easy-to-use Web front-end and migration tools for the administrator.