Container-based processing method, apparatus, and system

A computer system, comprising:

• a bus;
• a processor connected to the bus, wherein one or more containers are running on the processor;
• and
• a non-transitory memory connected to the bus;
• wherein when executed, code stored in the memory causes the processor over the bus to:
• when a state of a container of one or more containers need to be backed up, determine, according to a first flag bit in a flag file, that content of a first control group file in at least one control group file of the container is modified, wherein the container is in a Linux operating system and is a type of virtualization of a resource on an operating system layer and is used to isolate processes and resources, the at least one control group file, which is in the Linux operating system kernel, is used to perform control on running of a group of processes in the container, the flag file comprises at least one flag bit corresponding to the at least one control group file, and the at least one flag bit separately indicates whether content of the at least one control group file is modified;
• acquire, according to a correspondence between the at least one flag bit and a file name of the at least one control group file, a file name of the first control group file corresponding to the first flag bit;
• search for, according to a correspondence between the file name of the at least one control group file and a storage location of the at least one control group file, a storage location of the first control group file corresponding to the file name of the first control group file, and extract modified content of the first control group file from the first control group file stored in the storage location of the first control group file;
• and
• back up the file name of the first control group file and the modified content of the first control group file.