Apparatus and method for migrating virtual machine, where client is located, among different hosts

Abstract

The invention discloses an apparatus and a method for migrating a virtual machine, where a client is located, among different hosts, and aims to ensure business continuity and shorten migration delay. The apparatus comprises a resource scheduler module and a resource configuration module, wherein the resource scheduler module is used for obtaining a mirror image of a first virtual machine located in a first host and running a server; the client runs in a second virtual machine of the first host; the obtained mirror image is installed and runs in a second host which the client is migrated to, thereby generating a third virtual machine; the server runs in the third virtual machine; and the resource configuration module is used for adding a forwarding flow entry in the second host. By installing and running the mirror image, information required for accessing data in a network storage medium by the client is migrated to the second host, and old information still can be used after the client is migrated, so that the business continuity is ensured; and by adding the forwarding flow entry, a data access request of the client is forwarded to a new virtual machine, and the client does not need to re-establish a connection with a new server, so that the migration duration is shortened.

Description

technical field [0001] The invention relates to the technical field of network storage, and in particular to a device and a method for migrating a virtual machine where a data access client resides between different hosts. Background technique [0002] When using network storage technology for data storage, various storage protocols can be used, such as: Fiber Channel (Fiber Channel, FC), Internet Small Computer System Interface (internet Small Computer System Interface, iSCSI), Network File System (Network File System, NFS) Or public Internet file system (Common Internet File System, CIFS), etc. [0003] When using virtualization technology, a client (Client) running on a virtual machine (Virtual Machine, VM) may send a data access request to a server (Server) on another VM to access data on a network storage medium through the server . [0004] The server maintains data identifiers and data context relationships for data on the network storage medium, and may also mainta...

AI Technical Summary

Problems solved by technology

If the business on the NFS Client is not closed, when it is necessary to communicate with the new NFS Server running on the VM on the target host, if the old file handle, file context and file handle are still used to communicate with the file in the network file system The new NFS Server will not be able to recognize the mapping relationship between the handles, which will cause business interruption; if the NFSClient disconnects from the old NFS Server and re-establishes the connection with the new NFS Server, it will take a long time

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