Snapshot chain manufacturing method and device, electronic equipment and storage medium

Abstract

The invention discloses a snapshot chain manufacturing method and device, electronic equipment and a storage medium, and relates to the virtual machine technology. According to the specific scheme, the method comprises the steps of receiving a current instruction for making a virtual machine snapshot; in response to the instruction, storing incremental data of a current system disk of the virtual machine at the current moment into a storage service component; storing the incremental data as an incremental snapshot; based on the corresponding snapshot chain and the incremental snapshot of the storage service component at the previous moment, obtaining a corresponding snapshot chain of the storage service component at the current moment; if the number of the incremental snapshots at the current moment is smaller than a preset value, repeatedly executing the operation until the number of the incremental snapshots at the current moment is equal to the preset value. According to the embodiment of the invention, the strong dependency relationship between the snapshots on the snapshot chain can be greatly weakened, so that the integrity and correctness of the snapshot chain can be greatly improved, and various overtime and error problems which frequently occur due to an overlong link are reduced.

Description

technical field [0001] The present disclosure relates to the field of computer technology, further relates to virtual machine technology, and in particular to a method, device, electronic device and storage medium for making a snapshot chain. Background technique [0002] In the prior art, the operation process of making a snapshot chain is: first download each snapshot data on the snapshot chain stored on the storage service component (Bos) to the local, and then establish a snapshot chain through the qemu-img rebase operation; The operation process of rolling is: perform the qemu-img commit operation in reverse order on the snapshot data on the snapshot chain, submit and compress these data into a disk data new-disk, and create a new virtual disk by performing the qemu-img convert operation on the new-disk Machine image, start the virtual machine based on new-disk, and the snapshot rollback operation can be realized. When implementing the above two operations, it is neces...

AI Technical Summary

Problems solved by technology

When implementing the above two operations, it is necessary to download all the data on the snapshot chain to the local physical machine. When there is too much data, there is a risk of filling up the disk of the physical machine; when the snapshot chain is too long, because the data blocks that need to be downloaded Too much and it's time consuming

Moreover, if a snapshot is leaked during the production process, the integrity of the entire snapshot chain will be destroyed. Even if it takes time, the disk data may not be correct, that is, it may not be possible to restore to the moment when the snapshot was taken.

[0003] Using the existing snapshot chain business design, the snapshots on the snapshot chain are strongly dependent on each other. When the snapshot chain is too long, the integrity and correctness of the snapshot cannot be guaranteed; when creating a mirror or rolling back a snapshot through a snapshot During the operation, there will be a phenomenon that the operation process takes too long, and there is a risk that it may not be successful in the end; because the security of the virtual machine data on the local system disk is currently the main reliable means to back up by creating a snapshot, therefore, if The snapshot chain is incomplete. When the physical machine fails, the data in the virtual machine system disk will be at risk of loss.

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