Abstract: A protection mechanism for the computing environment of virtual machine was proposed, this scheme combined inside and outside monitoring mechanism to measure and monitor the computing environment of virtual machines, and it could continually and dynamically monitor and measure the virtual machines. This scheme could also use the feedback control mechanism to ensure the security of the virtual machines computing environment and enhance the dynamic adaptability of virtual machines. Comparing with the existing virtual machine security mechanisms, proposed scheme fully considers the computational loss of the cloud virtual machines, which has a high security and efficiency, and it is suitable for the virtual computing environment.

Key words: cloud computing; virtual machine; computing environment; proactive monitoring