Virtual cluster expanding method based on cloning

Abstract

The invention relates to the technical field of cloud computing, in particular to a virtual cluster expanding method based on cloning. The method includes the steps that firstly, all physical machines share one network sharing catalog, and when clusters are established, original virtual machine mirror image files are copied to the sharing catalog; then, external snapshot files are established for the original virtual machine mirror image files and stored in local catalogs of the physical machines, and virtual machines are established in an external snapshot mode; when the scale of the virtual clusters needs to be expanded, the local catalogs, selected to be established, of the physical machines are searched for the external snapshot files, if the external snapshot files exist, local cloning is conducted, and if no external snapshot files exist, cloning is conducted from the long distance to the local; finally, a front-end server writes the IP addresses of the newly-established virtual machines into a cluster list, and cluster expansion is finished. The virtual clusters are expanded based on the cloning technology for external snapshots, and a cluster expansion scheme which is quick, universal and high in flexibility is provided; the method can be used for expanding the virtual clusters.

Description

technical field [0001] The invention relates to the technical field of cloud computing, in particular to a virtual cluster expansion method based on cloning. Background technique [0002] In the era of cloud computing, the carrier of cluster applications has shifted from physical clusters to virtual virtual clusters; one of the biggest improvements is that virtual machines are used on demand, and the deployment speed is much faster than physical machines. The hardware detection step is also much faster. Usually, when the virtual cluster needs to be expanded, the method is to start from the original image to create the virtual machine again. The steps are as follows: [0003] 1. When the virtual cluster front-end server needs to expand the cluster scale, it sends a command to the cloud platform management terminal to request a new virtual machine; [0004] 2. After the virtual machine on the management side of the cloud platform is created, start the application server in t...

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Problems solved by technology

[0007] 1. The versatility is not strong. The application server in the newly created virtual machine lacks application state data. For cluster applications that have strict requirements on state consistency, it is necessary to resolve the gap between the newly created virtual machine and the old running virtual machine. Inter-state synchronization issues;

[0008] 2. The virtual cluster cannot be adjusted flexibly. The newly created virtual machine is created from the original virtual machine image. Therefore, individual adjustments made to the application of the old running virtual machine cannot immediately synchronize the entire cluster. Adjust one by one, in this case, individual virtual machines will be restarted, reducing the load capacity of the entire virtual cluster

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