Abstract:

In the cloud environment, virtual machines of different users are usually placed on the same physical machine, and this sharing of physical resources poses a serious threat to users' private data. Malicious users can improve the probability of co-existence with the target virtual machine by starting a large number of virtual machines or by taking advantage of the loopholes in the virtual machine placement strategy. In order to defend it actively, a placement method which considers the safety, energy consumption and load balance is proposed. First will be randomly assigned a virtual machine with the same probability, in order to prevent malicious users to obtain and make use of the virtual machine in place of some of the characteristics, in order to reduce the malicious user too much by starting the virtual machine to increase the probability of coexistence with the target virtual machine, the virtual machine when a user is assigned to the group number exceeds a certain value, will be assigned to the new group. Then, considering the situation of energy consumption and load balance, it is allocated to the appropriate physical host. The experimental results show that the probability of co-existence between virtual machines of different users is reduced and the security of virtual machine placement is guaranteed to a certain extent.

Key words: placement policy, virtual machine grouping, cloud environment, co-existence attack