Cross-platform virtual machine mandatory access control method in cloud computing environment

The invention provides a cross-platform virtual machine mandatory access control method in a cloud computing environment. The method mainly aims at two platforms, wherein the first platform uses operating systems including Ubuntu and the like, and mandatory access control software including apparmor and the like is used on the operating systems and uses a UUID (Universally Unique Identifier) as amandatory access control tag; and the other platform uses operating systems including Kylin and the like, and the operating systems use mandatory access control software including selinux and the likeand uses digits between 0 and 1023 as a mandatory access control tag. The mandatory access control tag is set for a virtual machine process and a virtual machine mirror image, and finally, the virtual machine process under the cloud computing environment only reads data which belongs to the own mirror image. Through the implementation of the virtual machine mandatory access control method, underthe situation that the mand