CN111399984A - File recovery method and system based on virtual machine backup data - Google Patents
File recovery method and system based on virtual machine backup data Download PDFInfo
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- CN111399984A CN111399984A CN202010196867.4A CN202010196867A CN111399984A CN 111399984 A CN111399984 A CN 111399984A CN 202010196867 A CN202010196867 A CN 202010196867A CN 111399984 A CN111399984 A CN 111399984A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1464—Management of the backup or restore process for networked environments
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
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- G06F2009/45562—Creating, deleting, cloning virtual machine instances
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Abstract
The invention discloses a file recovery system and method based on virtual machine backup data, wherein the system comprises: the source virtualization platform is used for carrying out snapshot on the virtual machine on the source virtualization platform, acquiring configuration information and change block information of the virtual machine based on a snapshot point, and storing the configuration information and the change block information to the backup server; the system comprises a source virtualization platform, a backup server, a transmission service agent program and a transmission service end, wherein the source virtualization platform is used for storing a virtual machine, the backup server is used for periodically backing up the virtual machine on the source virtualization platform to an appointed backup directory or storage, creating a new virtual machine to a target virtualization platform through a built-in virtual machine disk file when file recovery is carried out, mounting an appointed backup point disk file under a backup directory to the new virtual machine, appointing a target recovery machine, and sending the transmission service agent program to the target recovery machine so that a transmission client end in the new virtual machine can communicate with the transmission service end of the target recovery machine; and the target virtualization platform is connected with the backup server and provides the backup server to create the new virtual machine through a built-in virtual machine disk file.
Description
Technical Field
The invention relates to the technical field of computer data backup disaster recovery, in particular to a file recovery method and system based on virtual machine backup data.
Background
With the development of server virtualization technology and the wide application in various industries, the advantages of virtualization technology are gradually reflected, the cost of infrastructure is reduced, the IT flexibility is improved, hardware such as a CPU, a disk, a memory and an I/O can be changed into a resource pool capable of being dynamically managed, and the utilization rate of resources is improved.
Although the virtual machines on the server host are isolated from each other, security holes still exist. Some hackers may enter the server through the security holes or defects, and perform illegal operations, or some misoperation of the administrator may cause data loss and damage.
To prevent some unpredictable events from causing the loss of important data of the server, backup protection needs to be added to the server. Usually, a virtual machine is backed up for a virtual machine in a whole machine backup manner, and when a disaster occurs, a virtual machine can be created and restored through backup data. However, when the disk of the virtual machine is large, the efficiency of restoring the virtual machine by the backup mode of the whole machine is low, and the instantaneity requirement of some important data cannot be met.
Therefore, a file-level fine-grained restoration technology based on virtual backup data is needed to meet the above scenario and efficiently and accurately restore valid data.
Disclosure of Invention
In order to overcome the defects of the prior art, the present invention aims to provide a file recovery method and system based on virtual machine backup data, so as to quickly and accurately recover important data files in a disaster manner, thereby overcoming the time-consuming defect in the ordinary backup recovery manner, so as to reduce the recovery time of effective data, and provide a more efficient disaster recovery guarantee.
To achieve the above object, the present invention provides a file recovery system based on virtual machine backup data, including:
the source virtualization platform is used for carrying out snapshot on the virtual machine on the source virtualization platform and obtaining the configuration information and the change block information of the virtual machine based on a snapshot point so as to store the configuration information and the change block information to the backup server;
the backup server is used for regularly backing up the corresponding virtual machine on the source virtualization platform to a backup directory or storage appointed by the backup server, creating a new virtual machine to a target virtualization platform through a built-in virtual machine disk file during file recovery, mounting an appointed backup point disk file under the backup directory to the new virtual machine, appointing a target recovery machine, and sending a transmission service agent program to the target recovery machine through a remote command, so that a transmission client in the new virtual machine can communicate with a transmission server of the target recovery machine, and file recovery is realized;
and the target virtualization platform is connected with the backup server, provides the backup server to create the new virtual machine through a built-in virtual machine disk file, communicates with a transmission server of the target recovery machine through a transmission client in the new virtual machine, and sends a file by the new virtual machine and writes the file into a specified directory of the target recovery machine so as to complete file recovery.
Preferably, the source virtualization platform further comprises:
the backup task adding unit is used for selecting all the virtual machines on the source virtualization platform, selecting the specified virtual machine for protection and adding a backup task;
and the snapshot creating unit is used for executing a snapshot on the virtual machine added in the backup task, acquiring the configuration, the metadata and the change block information of the corresponding virtual machine based on the snapshot, and transmitting the configuration, the metadata and the change block information to the backup server.
Preferably, after the source virtualization platform backs up the virtual machine to the backup server, the snapshot corresponding to the virtual machine is deleted.
Preferably, the backup server further comprises:
the backup unit is used for running a backup program and regularly backing up a corresponding virtual machine on the source virtualization platform to a backup catalog or storage designated by the backup server;
the recovery pre-preparation unit is used for customizing a virtual machine, internally setting a transmission client service and a start script, making a disk file and metadata information of the virtual machine, storing the disk file and the metadata information into a specified directory of the backup server, installing and configuring NFS (network file system) service on the backup server, and mounting a backup directory stored with backup data to the target virtualization platform through NFS for storage;
the virtual machine creating and configuring unit is connected with the target virtualization platform, creates a new virtual machine to the target virtualization platform through the disk file of the virtual machine customized by the recovery pre-preparation unit, mounts the backup data file of the designated backup point under the backup directory to the current new virtual machine, and reconfigures the current new virtual machine;
the virtual machine starting unit is used for starting the virtual machine created by the virtual machine creating and configuring unit, executing a starting script after the virtual machine is started, automatically loading floppy disk information, setting a virtual machine IP and simultaneously starting a transmission client service of the virtual machine;
and the target recovery machine determining unit is used for appointing a target recovery machine, sending the transmission service agent program to the target recovery machine in a remote calling mode, and executing the program on the target recovery machine, so that the target recovery machine is used as a transmission service end to communicate with the transmission client of the virtual machine configured by the virtual machine creation configuration unit.
Preferably, the backup unit stores the virtual machine configuration and the metadata based on the obtained virtual machine configuration, the metadata, and the change block information, performs backup according to the change block data, and writes the data in a backup directory or storage specified by the backup server in an original disk format.
Preferably, the recovery pre-preparation unit customizes a disk file of the virtual machine system in a VMDK format in advance, installs a transmission client service in advance in the system, adds a start script, installs an NFS service on the backup server, sets a backup directory stored with backup data as an NFS shared directory, opens an access right, and mounts the backup directory stored with the backup data to the target virtualization platform through the NFS for storage.
Preferably, the virtual machine creating unit creates a new virtual machine to the target virtualization platform through a built-in customized virtual machine system disk file, mounts a disk VMDK file under a specified backup directory to the current virtual machine, reconfigures the new virtual machine, creates a floppy disk file, writes virtual machine IP information, and configures the floppy disk file to the current virtual machine.
In order to achieve the above object, the present invention further provides a file recovery method based on the virtual machine backup data, including the following steps:
step S1, the virtual machine on the source virtualization platform is snapshot, the virtual machine configuration information and the change block information are obtained based on the snapshot point, and the virtual machine configuration information and the change block information are saved to the backup server through the backup program on the backup server;
step S2, when the file is restored, the backup server creates a new virtual machine to the target virtualization platform through the built-in virtual machine disk file, mounts the specified backup point disk file in the backup directory to the new virtual machine, specifies the target restoration machine, and sends the transmission service agent program to the target restoration machine through a remote command, so that the transmission client in the new virtual machine communicates with the transmission service end of the target restoration machine;
step S3, the transmission client in the new virtual machine communicates with the transmission server of the target recovery machine, and the new virtual machine sends the file and writes the file into the specified directory of the target recovery machine.
Preferably, the step S1 further includes:
step S100, selecting all virtual machines on the source virtualization platform, selecting a specified virtual machine for protection, and adding a backup task;
step S101, executing a snapshot on the virtual machine added in the backup task, acquiring the configuration, metadata and change block information of the virtual machine based on the snapshot, and transmitting the configuration, metadata and change block information to a backup server so as to backup the acquired configuration information and the change block data acquired according to the change block information to the backup server;
step S102, a backup server runs a backup program, saves the virtual machine configuration and the metadata based on the obtained virtual machine configuration, the metadata and the change block information, backs up according to the change block data, and writes the data into a backup catalog or storage appointed by the backup server in an original disk format;
step S103, after the virtual machine is backed up to the backup server, deleting the snapshot of the corresponding virtual machine on the source virtualization platform, and completing the data backup.
Preferably, the step S2 further includes:
step S200, customizing a virtual machine, internally setting a transmission client service and a start script, making a disk file and metadata information of the virtual machine, storing the disk file and the metadata information into a specified directory of the backup server, installing and configuring NFS service on the backup server, and mounting a backup directory stored with backup data to the target virtualization platform through NFS for storage;
step S201, connecting a target virtualization platform, creating a new virtual machine to the target virtualization platform through the disk file of the virtual machine customized in the step S200, mounting the disk file of the specified backup point in the backup directory to the current new virtual machine, and reconfiguring the current new virtual machine;
step S202, starting the virtual machine created in step S201, executing a start script after the virtual machine is started, automatically loading floppy disk information, setting a virtual machine IP, and simultaneously starting a transmission client service of the virtual machine;
step S203, designating a target recovery machine, sending a transmission service agent program to the target recovery machine in a remote invocation manner, and executing the program on the target recovery machine, so that the target recovery machine as a transmission service end can communicate with the transmission client of the virtual machine configured in step S201.
Compared with the prior art, the file recovery system and method based on the virtual machine backup data of the invention regularly backups the corresponding virtual machine on the source virtualization platform to the designated directory or storage of the backup server by running the backup program on the backup server, and mounts the backup directory on the backup server as NFS storage to the target virtualization platform, creates a new virtual machine to the target virtualization platform through the built-in virtual machine file during recovery, mounts the designated backup point disk file under the backup directory to the current virtual machine after creating the new virtual machine, so that the disk data can be normally read after the virtual machine is started, finally designates the target recovery machine, sends the transmission agent service program to the target recovery machine through a remote command, and transmits the designated file by connecting the transmission client in the customized virtual machine to the target recovery machine, the invention can quickly establish and start the virtual machine by mapping and establishing the virtual machine through nfs service, and can directly read the source backup data information by mounting the backup data file.
Drawings
FIG. 1 is a system architecture diagram of a file recovery system based on virtual machine backup data according to the present invention;
FIG. 2 is an architecture diagram of a source virtualization platform in accordance with an embodiment of the present invention;
FIG. 3 is an architecture diagram of a backup server in an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a file recovery method based on virtual machine backup data according to the present invention;
FIG. 5 is a detailed flowchart of a backup process in an embodiment of the invention;
fig. 6 is a specific flowchart of a file recovery process in the embodiment of the present invention.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
In the following description of the present invention, a source end represents a data source, which is usually a disk or a file containing a computer file system, and a backup end represents a backup storage device containing a computer file system, where the storage device includes a disk, a storage file, and the like.
Fig. 1 is a system architecture diagram of a file recovery system based on virtual machine backup data according to the present invention. As shown in fig. 1, the file recovery system based on virtual machine backup data of the present invention includes:
the source virtualization platform 10 snapshots a virtual machine selected on the source virtualization platform 10, acquires configuration information and change block information of the virtual machine based on a snapshot point, and stores the configuration information and the change block information to the backup server 20. The source virtualization platform 10 is disposed on a source server host, and is provided with a plurality of virtual machines.
Specifically, as shown in fig. 2, the source virtualization platform 10 further includes:
and the backup task adding unit 101 is configured to add the selected virtual machine into the backup task according to the selection of the virtual machine of the source virtualization platform 10. That is, for all the virtual machines on the source virtualization platform 10, a designated virtual machine is selected for protection, and a backup task is added.
In the embodiment of the present invention, when the backup program (which may be periodically executed) is run on the backup server 20, and the source virtualization platform 10 is connected and logged in, since the source virtualization platform 10 may have a plurality of virtual machines, all the virtual machines (which display virtual base list information) are listed in the source virtualization platform 10, and when a virtual machine to be protected is selected, the backup task adding unit 101 selects a specified virtual machine for protection, and adds a backup task.
A snapshot creating unit 102, configured to execute a snapshot on the virtual machine added to the backup task, acquire virtual machine configuration, metadata, and change block information based on the snapshot, transmit the virtual machine configuration, the metadata, and the change block information to the backup server 20, and delete the snapshot of the corresponding virtual machine on the source virtualization platform 10 after the backup is completed, thereby completing the data backup.
The backup server 20 is configured to periodically backup the corresponding virtual machine on the source virtualization platform 10 to a backup directory or storage designated by the backup server 20, create a new virtual machine to the target virtualization platform 30 through a built-in virtual machine file during recovery, mount a specified backup point disk file in the backup directory to the new virtual machine, so that the new virtual machine can normally read corresponding disk data after being started, designate a target recovery machine, and send a transmission service agent program to the target recovery machine through a remote command, so that a transmission client in the new virtual machine communicates with a transmission service end of the target recovery machine.
Specifically, as shown in fig. 2, the backup server 20 further includes:
the backup unit 201 is configured to run a backup program, connect to the source virtualization platform 10, and after obtaining the virtual machine configuration information and the change block information, read the valid block data according to the obtained virtual machine configuration information and the change block information, and store the valid block data to the local backup server, and simultaneously store the virtual machine configuration file and the metadata file. Specifically, the backup unit 201 saves the virtual machine configuration file and the metadata information based on the obtained virtual machine configuration file, the virtual machine metadata information, and the change block information, obtains the change block data according to the change block information for backup, and writes the data in the original disk format into a backup directory or storage locally specified by the backup server 20. Generally, the backup is divided into full, differential and incremental, and the full backup process is to backup all the effective data of the change blocks; the incremental backup process is to obtain incremental change block information through the change block ID in the configuration information stored last time, then read the change block data and store the change block data to a backup server, and simultaneously appoint a disk chain relation to finish data organization and storage; the differential backups are incremental in nature, each differential backed up based on the previous backup data. In the invention, the change block ID is based on snapshot, generally, after the backup is done, an ID is recorded, the system stores the ID in a virtual machine configuration file under a backup directory, and the latest change block information of the original virtual machine can be obtained through the ID next time without obtaining all change blocks, the change block information comprises a set of offset and length, and the data at the corresponding position is the real data of a disk.
A recovery pre-preparation unit 202, configured to customize a virtual machine to serve as a temporary virtual machine for reading backup data during recovery, where a built-in transmission client service and a start script are stored in a disk file, and a virtual machine disk file and metadata information in a VMDK format are created and stored in a designated directory of the backup server 20, and at the same time, an NFS service is installed and configured on the backup server 20, and a backup directory in which backup data is stored is mounted to the target virtualization platform 30 through an NFS for storage. It should be noted that the specific directory structures of the designated directory and the backup directory are not important, and it is critical that all directories need to be shared out through the NFS service.
In a specific embodiment of the present invention, the recovery pre-preparation unit 202 customizes a VMDK file of a virtual machine system disk in advance, installs a transmission client service in advance in the system, and adds a start script, where the start script has a function of setting a virtual machine IP through a floppy disk and starting the transmission client service, and meanwhile, the recovery pre-preparation unit 202 also installs an NFS service on a backup server, sets a backup directory stored with backup data as an NFS shared directory, opens an access right, connects to the target virtualization platform 30, and mounts the backup directory stored with the backup data to the target virtualization platform 30 through the NFS as storage.
The virtual machine creating and configuring unit 203 is connected to the target virtualization platform 30, creates a new virtual machine to the target virtualization platform 30 through the virtual machine disk file customized by the recovery preparation unit 202, mounts the backup data of the designated backup point under the backup directory as a mount disk to the current new virtual machine, and reconfigures the current new virtual machine. In the invention, each backup point is stored in a separate disk file, and after a customized virtual machine is created, the file of the backup point is selected to be mounted on a new virtual machine. Each disk is a VMDK file. Mount here refers to attaching a disk of backup data to a new virtual machine customized. Therefore, after the startup, the file under the corresponding disk can be accessed and transmitted to the target end, and the file recovery is realized.
Specifically, the virtual machine creation configuration unit 203 creates a new virtual machine to the target virtualization platform 30 through the built-in customized virtual machine disk file and configuration, mounts the specified backup directory lower disk VMDK file to the current virtual machine, reconfigures the new virtual machine, and allows the disk data recorded in the mounted disk file to be read normally, and creates a floppy disk file, writes information such as a virtual machine IP, and configures the floppy disk file to the current new virtual machine.
In the present invention, customizing the new virtual machine has the following effects: 1. as a carrier, the backup data is read. 2. The processing and operation flow is simple, if a new virtual machine is directly recovered through backup data, password login is required, and a corresponding transmission tool is required to transmit files.
A virtual machine starting unit 204, configured to start the virtual machine created by the virtual machine creation configuration unit 203, and after the virtual machine is started, the virtual machine executes a built-in start script, automatically loads floppy information, sets a virtual machine IP, and starts its transport client service at the same time.
Specifically, after the virtual machine creation configuration unit 203 completes configuration of the virtual machine, the virtual machine is started through the virtual machine starting unit 204, and after the virtual machine is started, the virtual machine executes a built-in start script, automatically reads information of a floppy disk, sets an IP, and starts a built-in transmission client service.
A target recovery machine determining unit 205, configured to designate a target recovery machine, send a transmission service agent program pre-installed on the backup server to the target recovery machine in a remote invocation manner, and execute the transmission service agent program on the target recovery machine, so that the target recovery machine can be used as a transmission service end to communicate with a transmission client of the virtual machine configured by the virtual machine creation and configuration unit 203. Specifically, the target recovery machine may be a virtual machine on a target virtualization platform or other platforms, or may be a physical machine, that is, a target machine to which a file is to be recovered, the target machine specifying unit 205 selects the target recovery machine, sends the transfer service agent on the backup server 20 to the target recovery machine through a remote access port by using a remote call method, and executes the start of the service, so as to receive file data sent by the virtual machine started by the virtual machine starting unit 204 and complete the write operation. It should be noted here that the target recovery machine has no relation with the target virtualization platform, and may be a physical machine or a virtual machine.
And a recovery file determining unit 206, configured to select a file of a specified directory in the virtual machine, communicate with the transmission server of the target recovery machine through the transmission client in the virtual machine, send a corresponding file, and write the file into the specified directory, so as to complete file recovery. Specifically, the restoration file determination unit 206 lists the directory and file structure of the backup data disk by the created virtual machine IP, i.e., the client, by the enabled built-in transfer client service, then selects a directory or file specified in the transfer client virtual machine, transfers data to the target restoration machine by the transfer client service in the virtual machine, writes the data to the corresponding specified directory, and completes restoration.
And the target virtualization platform 30 is connected to the backup server 20 when the backup server 20 performs a recovery process, so as to enable the backup server 20 to create the new virtual machine through a built-in virtual machine file, and the target virtualization platform 30 communicates with a transmission server of the target recovery machine through a transmission client in the new virtual machine, and the new virtual machine sends a file and writes the file into a specified directory of the target recovery machine, so as to complete file recovery. It should be noted that the target virtualization platform 30 may be the source virtualization platform 10, or may be a different platform, and the invention is not limited thereto.
Fig. 4 is a flowchart illustrating steps of a file recovery method based on virtual machine backup data according to the present invention. As shown in fig. 4, the file recovery method based on the virtual machine backup data of the present invention includes the following steps:
step S1, snapshot the virtual machine on the source virtualization platform 10, obtain the configuration information and the change block information of the virtual machine based on the snapshot point, and save the configuration information and the change block information to the backup server through the backup program on the backup server.
Specifically, step S1 further includes:
and S100, selecting a specified virtual machine for protection according to all the virtual machines on the source virtualization platform, and adding a backup task.
In the embodiment of the present invention, since the source virtualization platform may have a plurality of virtual machines, all the virtual machines are listed in the source virtualization platform, and the designated virtual machine is selected for protection according to all the listed virtual machines, and a backup task is added.
Step S101, executing a snapshot on the virtual machine added to the backup task, acquiring the configuration, metadata and change block information of the virtual machine based on the snapshot, and transmitting the configuration, metadata and change block information to the backup server, so as to backup the acquired configuration information and the change block data acquired according to the change block information to the backup server.
Step S102, the backup server runs a backup program, saves the virtual machine configuration information and the metafile information based on the obtained virtual machine configuration, the obtained metadata and the obtained change block information, performs data backup according to the change block data, and writes the data into a local appointed directory or storage of the backup server in an original disk format. Generally, backups are divided into three types, full, differential, and incremental. The full backup process is to backup all the effective data of the change blocks; the incremental backup process is to obtain incremental change block information through the change block ID in the configuration information stored last time, then read the change block data and store the change block data to a backup server, and simultaneously appoint a disk chain relation; the differential backups are incremental in nature, each differential backed up based on the previous backup data.
Step S103, after the virtual machine is backed up to the backup server, deleting the snapshot of the corresponding virtual machine on the source virtualization platform, and completing the data backup.
Step S2, when the file is restored, the backup server creates a new virtual machine onto the target virtualization platform through the built-in virtual machine file, mounts the specified backup point disk file in the backup directory onto the new virtual machine, so that the new virtual machine can normally read the corresponding disk data after being started, specifies the target restoration machine, and sends the transmission service agent program to the target restoration machine through a remote command, so that the transmission client in the new virtual machine communicates with the transmission server of the target restoration machine.
Specifically, step S2 further includes "
Step S200, customizing the virtual machine to be used as a temporary virtual machine for reading backup data during recovery, wherein the temporary virtual machine is internally provided with a transmission client service and a start script, a virtual machine disk file and metadata information in a VMDK format are manufactured and stored under an appointed directory of the backup server, an NFS service is installed and configured on the backup server, and a backup directory stored with the backup data is mounted to the target virtualization platform through the NFS for storage.
In the specific embodiment of the invention, a VMDK file of a virtual machine system disk is customized in advance, a transmission client service is installed in the system in advance, a start script is added, and the start script has the functions of setting an IP through a floppy disk and starting the transmission client service; and installing an NFS service on a backup server, setting a backup directory stored with backup data as an NFS shared directory, opening access authority, connecting with a target virtualization platform, and mounting the backup directory stored with the backup data to the target virtualization platform through the NFS for storage.
Step S201, connecting the target virtualization platform, creating a new virtual machine to the target virtualization platform through the disk file of the virtual machine customized in step S200, mounting the VMDK file of the backup data of the designated backup point under the backup directory to the current new virtual machine, and reconfiguring the current new virtual machine. In the invention, each backup point is stored in a separate disk file, and after a customized virtual machine is created, the file of the backup point is selected and added to a new virtual machine
Specifically, in step S201, a new virtual machine is created to the target virtualization platform through the built-in customized virtual machine disk file and configuration, and at the same time, the disk VMDK file under the specified backup directory is mounted to the current virtual machine, and the new virtual machine is reconfigured, so that the disk data recorded by the mounted disk file can be read normally, and a disk file is created, and information such as IP is written in, and configured to the current new virtual machine.
Step S202, starting the virtual machine created in step S201, after the virtual machine is started, executing a start script by the virtual machine, automatically loading floppy disk information, setting the IP of the virtual machine, and simultaneously starting the transmission client service of the virtual machine.
Specifically, after the configuration of the virtual machine is completed, the virtual machine is started, and after the virtual machine is started, the virtual machine executes a built-in start script, automatically reads information of a floppy disk, sets an IP, and starts a built-in transmission client service.
Step S203, designating a target recovery machine, sending a transmission service agent program pre-installed in the backup server to the target recovery machine in a remote call manner, and executing the transmission service agent program on the target recovery machine, so that the target recovery machine as a transmission server can communicate with the transmission client of the virtual machine configured in step S201. Specifically, the target recovery machine may be a virtual machine on the target virtualization platform or another platform, or may be a physical machine, that is, a target machine to which the file is to be recovered, in step S203, the target recovery machine is selected, the transfer service agent on the backup server is sent to the target recovery machine of the target virtualization platform through the remote access port in a remote call manner, and the transfer service agent is started to receive the file data sent by the virtual machine started in step S202 and complete the write operation.
Step S3, the transmission client in the new virtual machine communicates with the transmission server of the target recovery machine, and the new virtual machine sends the file and writes the file into the specified directory of the target recovery machine, thereby completing file recovery.
Examples
Fig. 5 is a specific flowchart of the backup process in the embodiment of the present invention, where the backup process is as follows:
firstly, logging in a source virtualization platform, acquiring list information of virtual machines, selecting a specified virtual machine to add to a backup task, and performing backup.
Then, a snapshot is created for the virtual machine, and based on the snapshot, virtual machine configuration information and change block information are acquired.
And finally, the backup server stores the configuration information, remotely reads the data of the changed blocks, and writes the data into a local appointed directory or storage in an original disk format. And deleting the snapshot to complete the backup. The incremental backup process is to obtain incremental change block information through the change block ID in the configuration information stored last time, read the change block data and store the change block data to the backup server, and specify the disk chain relationship.
Fig. 6 is a specific flowchart of a file recovery process in the embodiment of the present invention, where the file recovery process is as follows:
an environment preparation stage: firstly, a VMDK file of a virtual machine system disk is customized in advance, a transmission client service is installed in the system in advance, and a start script is added, wherein the start script has the functions as follows: setting IP through a floppy disk and starting a transmission client service; secondly, the NFS service is installed on the backup server, the backup data storage catalog is set to be the NFS shared catalog, and the access right is opened.
When the environment preparation is completed, the recovery flow is started:
connecting a target virtualization platform, creating a new virtual machine through a customized virtual machine VMDK file, mounting a backup data VMDK file of a specified backup point as a mounting disk, reconfiguring the virtual machine, then making a floppy disk file, writing IP information, mounting the floppy disk file to the virtual machine, and reconfiguring the virtual machine.
After configuration is completed, after the virtual machine is started, a built-in starting script is used for automatically reading information of a floppy disk, setting IP (Internet protocol) and starting built-in transmission client service.
Selecting a target recovery machine, opening a remote port in advance, sending a transmission service agent program on a backup server to the target recovery machine in a remote calling mode, and executing and starting the service.
And finally, selecting the file of the specified directory, communicating with the transmission server of the target recovery machine through the transmission client, sending the file and writing the file into the specified directory of the target recovery machine to finish file recovery.
The method has simple process and has very outstanding value in the actual production environment. Particularly, under the condition that the disk file of the virtual machine is oversized, after a disaster occurs, the recovery time is too long in a common mode, and the effective data can be rapidly and accurately recovered by a mode of recovering the effective data at a file-level fine granularity, so that the loss when the disaster occurs is greatly reduced. The invention has high file-level recovery efficiency and high speed and can accurately recover the effective data. The method is simple and convenient to operate, file and directory structures in the backup data can be displayed in a tree form, designated files and directories are selected for recovery, and the virtualization platform host does not need to be provided with agents.
To sum up, the invention relates to a file recovery system and method based on virtual machine backup data, which periodically backs up a corresponding virtual machine on a source virtualization platform to a backup server designated directory or storage by running a backup program on a backup server, mounts the backup directory on the backup server as NFS storage to a target virtualization platform, creates a new virtual machine to the target virtualization platform through a built-in virtual machine file during recovery, mounts a designated backup point disk file under the backup directory to a current virtual machine after creating the new virtual machine so that the disk data can be normally read after the virtual machine is started, finally designates the target recovery machine, sends a transmission agent service program to the target recovery machine through a remote command, and transmits the designated file by connecting a transmission client in a customized virtual machine to the target recovery machine, the invention can quickly establish and start the virtual machine by mapping and establishing the virtual machine through nfs service, and can directly read the source backup data information by mounting the backup data file.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
1. A file recovery system based on virtual machine backup data, comprising:
the source virtualization platform is used for carrying out snapshot on the virtual machine on the source virtualization platform and obtaining the configuration information and the change block information of the virtual machine based on a snapshot point so as to store the configuration information and the change block information to the backup server;
the backup server is used for regularly backing up the corresponding virtual machine on the source virtualization platform to a backup directory or storage appointed by the backup server, creating a new virtual machine to a target virtualization platform through a built-in virtual machine disk file during file recovery, mounting an appointed backup point disk file under the backup directory to the new virtual machine, appointing a target recovery machine, and sending a transmission service agent program to the target recovery machine through a remote command, so that a transmission client in the new virtual machine can communicate with a transmission server of the target recovery machine, and file recovery is realized;
and the target virtualization platform is connected with the backup server, provides the backup server to create the new virtual machine through a built-in virtual machine disk file, communicates with a transmission server of the target recovery machine through a transmission client in the new virtual machine, and sends a file by the new virtual machine and writes the file into a specified directory of the target recovery machine so as to complete file recovery.
2. The virtual machine backup data based file recovery system of claim 1, wherein the source virtualization platform further comprises:
the backup task adding unit is used for selecting all the virtual machines on the source virtualization platform, selecting the specified virtual machine for protection and adding a backup task;
and the snapshot creating unit is used for executing a snapshot on the virtual machine added in the backup task, acquiring the configuration, the metadata and the change block information of the corresponding virtual machine based on the snapshot, and transmitting the configuration, the metadata and the change block information to the backup server.
3. The file recovery system based on the virtual machine backup data according to claim 1, wherein: and after the source virtualization platform backs up the virtual machine to the backup server, deleting the snapshot corresponding to the virtual machine.
4. The virtual machine backed data based file restoration system according to claim 1, wherein the backup server further comprises:
the backup unit is used for running a backup program and regularly backing up a corresponding virtual machine on the source virtualization platform to a backup catalog or storage designated by the backup server;
the recovery pre-preparation unit is used for customizing a virtual machine, internally setting a transmission client service and a start script, making a disk file and metadata information of the virtual machine, storing the disk file and the metadata information under an appointed directory of the backup server, installing and configuring NFS (network file system) service on the backup server, and mounting a backup directory stored with backup data to the target virtualization platform through NFS for storage;
the virtual machine creating and configuring unit is connected with the target virtualization platform, creates a new virtual machine to the target virtualization platform through the disk file of the virtual machine customized by the recovery pre-preparation unit, mounts the backup data file of the designated backup point under the backup directory to the current new virtual machine, and reconfigures the current new virtual machine;
the virtual machine starting unit is used for starting the virtual machine created by the virtual machine creating and configuring unit, executing a starting script after the virtual machine is started, automatically loading floppy disk information, setting a virtual machine IP and simultaneously starting a transmission client service of the virtual machine;
and the target recovery machine determining unit is used for appointing a target recovery machine, sending the transmission service agent program to the target recovery machine in a remote calling mode, and executing the program on the target recovery machine, so that the target recovery machine is used as a transmission service end to communicate with the transmission client of the virtual machine configured by the virtual machine creation configuration unit.
5. The file recovery system based on the virtual machine backup data according to claim 4, wherein: the backup unit stores the virtual machine configuration and the metadata based on the acquired virtual machine configuration, the metadata and the change block information, performs backup according to the change block data, and writes the data into a backup directory or storage designated by a backup server in an original disk format.
6. The file recovery system based on the virtual machine backup data according to claim 4, wherein: the recovery pre-preparation unit pre-customizes a disk file of a virtual machine system in a VMDK format, pre-installs a transmission client service in the system, adds a start script, simultaneously installs an NFS service on the backup server, sets a backup directory stored with backup data as an NFS shared directory, opens an access right, and mounts the backup directory stored with the backup data to the target virtualization platform through the NFS for storage.
7. The file recovery system based on the virtual machine backup data according to claim 6, wherein: and the virtual machine creating unit creates a new virtual machine to the target virtualization platform through a built-in customized virtual machine system disk file, simultaneously mounts a disk VMDK file under a specified backup directory to the current virtual machine, reconfigures the new virtual machine, makes a floppy disk file, writes in virtual machine IP information, and configures the floppy disk file to the current new virtual machine.
8. A file recovery method based on virtual machine backup data comprises the following steps:
step S1, the virtual machine on the source virtualization platform is snapshot, the virtual machine configuration information and the change block information are obtained based on the snapshot point, and the virtual machine configuration information and the change block information are saved to the backup server through the backup program on the backup server;
step S2, when the file is restored, the backup server creates a new virtual machine to the target virtualization platform through the built-in virtual machine disk file, mounts the specified backup point disk file in the backup directory to the new virtual machine, specifies the target restoration machine, and sends the transmission service agent program to the target restoration machine through a remote command, so that the transmission client in the new virtual machine communicates with the transmission service end of the target restoration machine;
step S3, the transmission client in the new virtual machine communicates with the transmission server of the target recovery machine, and the new virtual machine sends the file and writes the file into the specified directory of the target recovery machine.
9. The method for file recovery based on virtual machine backed data according to claim 8, wherein the step S1 further comprises:
step S100, selecting all virtual machines on the source virtualization platform, selecting a specified virtual machine for protection, and adding a backup task;
step S101, executing a snapshot on the virtual machine added in the backup task, acquiring the configuration, metadata and change block information of the virtual machine based on the snapshot, and transmitting the configuration, metadata and change block information to a backup server so as to backup the acquired configuration information and the change block data acquired according to the change block information to the backup server;
step S102, a backup server runs a backup program, saves the virtual machine configuration and the metadata based on the obtained virtual machine configuration, the metadata and the change block information, backs up according to the change block data, and writes the data into a backup catalog or storage appointed by the backup server in an original disk format;
step S103, after the virtual machine is backed up to the backup server, deleting the snapshot of the corresponding virtual machine on the source virtualization platform, and completing the data backup.
10. The method for file recovery based on virtual machine backed data according to claim 8, wherein the step S2 further comprises:
step S200, customizing a virtual machine, internally setting a transmission client service and a start script, making a disk file and metadata information of the virtual machine, storing the disk file and the metadata information into a specified directory of the backup server, installing and configuring NFS service on the backup server, and mounting a backup directory stored with backup data to the target virtualization platform through NFS for storage;
step S201, connecting a target virtualization platform, creating a new virtual machine to the target virtualization platform through the disk file of the virtual machine customized in the step S200, mounting the disk file of the specified backup point in the backup directory to the current new virtual machine, and reconfiguring the current new virtual machine;
step S202, starting the virtual machine created in step S201, executing a start script after the virtual machine is started, automatically loading floppy disk information, setting a virtual machine IP, and simultaneously starting a transmission client service of the virtual machine;
step S203, designating a target recovery machine, sending a transmission service agent program to the target recovery machine in a remote invocation manner, and executing the program on the target recovery machine, so that the target recovery machine as a transmission service end can communicate with the transmission client of the virtual machine configured in step S201.
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