Research And Implementation Of Virtual Network System In Cloud Computing Environment

The virtualization technology in cloud computing can realize the rapid deployment of business system and provide the flexibility of scalability.Through the functions of high availability,fault tolerance,snapshot and backup,it can easily improve the business continuity which needs professional software,hardware resource utilization and data center management efficiency.Among them,the software-definition network is one of the key support technologies in virtualization technology.Through the software defined network,you can quickly set up a virtual data center,to achieve border isolation,through the internal and external network channels.The main work of the thesis is as follows:(1)This thesis presents a virtual network communication method that combining Neutron network with VMware vSphere virtualization platform.VMware vSphere virtualization platform comes with a relatively simple virtual network,but it can only provide the function of virtual switches,unable to achieve L3-L7 network function,which will not be able to quickly create a virtual data center,and require a large number of network devices in a virtualized environment.In this thesis,Neutron L2 is used to interface with the distributed virtual switches in the VMware vSphere Virtualization Platform to enable the Neutron network to drain,encapsulate,and forward the existing network traffic in the vSphere Virtualization Platform.Virtual network,security group,floating IP and other functions,to achieve a virtual network L3-L7 network functions.(2)Design and implementation of the virtual network management system CloudNS.In the actual virtual environment,due to the higher and higher requirements of the user on the line speed of the service,how to use the virtual network system conveniently and quickly is also a problem that users are increasingly concerned about.This thesis is based on the principles of software design and development,modularization,loosely coupled,interface standardization,processing automation,using Spring MVC as the base framework,Jquery UI for UI implementation,and database,message middleware,cache and other components,using Java language,Design and implementation of a unified management through the Web virtual network management system.(3)In view of the realization of virtual network in this theory,the experimental environment of VMware vSphere virtualization platform and modified Neutron network is set up.In the experiment,a variety of test scenarios were set up to simulate the virtual network communication used in the actual production environment as much as possible,such as multi-virtual machine communication among single-compute node,communication of virtual machines between dual computing nodes,and internal and external network nodes Network communication and so on.The results show that the design of this thesis is feasible and can achieve better network performance.