CN113515410A - Virtual machine protection system and implementation method - Google Patents
Virtual machine protection system and implementation method Download PDFInfo
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- 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
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- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
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- G06F11/1451—Management of the data involved in backup or backup restore by selection of backup contents
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- 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
- G06F11/1456—Hardware arrangements for backup
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- 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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- 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
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/815—Virtual
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Abstract
The invention discloses a virtual machine protection system and a realization method, wherein the system comprises: the virtual machine protection server is used for storing virtual machine protection rules, processing most management work of virtual machine protection, creating snapshots for virtual machines to be protected, obtaining configuration of a source virtual machine and disk information to be stored in the disaster recovery server, obtaining data block information to be protected of a disk to be stored in the disaster recovery server, simultaneously allocating cache size during virtual machine disk data transmission, starting tasks of the disaster recovery server to perform disk data transmission, clearing the snapshots after the disk data transmission is finished, recovering caches of completed tasks, recalculating and updating the cache size of other running tasks; and the disaster recovery server transmits and stores the data of the disk data block information to be protected according to the cache size distributed by the virtual machine protection server when receiving the task of starting the disk data transmission of the disaster recovery server.
Description
Technical Field
The invention relates to the technical field of computer disaster recovery backup, in particular to a high-performance virtual machine protection system and an implementation method.
Background
With the rapid development of information technology, the demand of computing infrastructure is continuously increased in the information-based construction process, and the requirements on hardware equipment, software, maintenance cost and timeliness are higher and higher. Hardware virtualization ensues in order to increase infrastructure utilization, reducing time and money overhead. Along with the rigid demand of virtualization, each virtualization platform has come up, and the VMware virtualization technology is the most mature, has the highest market share and is the most widely used.
With the widespread application of virtualization, virtual machines are the most important basic data, and the protection of the virtual machines becomes necessary configuration, and products for protecting the virtual machines in a virtualization platform are increasing. Because of the position of the VMware in virtualization and the easy-to-use development interface provided by the VMware, basically, each virtual machine protection product is supported from the beginning of the VMware, and the reliability, the usability and the performance supported by a VMware platform are taken as a basis for comparison.
The VMware is provided with a vadp (VMware vStorage API for Data protection) interface, and provides functions of managing a VMware virtualization platform, acquiring effective Data of a disk during full protection, changing Data during incremental protection, reading and writing specified position Data of the disk of the virtual machine, and the like, so that the purpose of protecting the virtual machine is achieved.
In the VMware VADP interface, a virtual Disk Development kit vddk (virtual Disk Development kit) is used for managing the virtual Disk and implementing data protection. For the interface of disk data remote read and write in VDDK, VMware is realized by using self-developed NFC (network File copy) protocol, and each VMware ESxi virtual machine provides a total of 32M cache to support NFC. Based on the realization of a disk read-write interface in VMware VDDK, when a virtual machine protection product protects the disk data of a virtual machine, the total cache size of the read-write disk can not exceed 32M for the same ESxi virtual machine. The virtual machine protection product needs to comprehensively consider the problems of simultaneous protection of multiple virtual machines and the size of a cache read by a single disk, which is also the most important configuration affecting the protection performance.
At present, VMware virtual machine protection products of various manufacturers are different in function, and are realized by developing VMware VADP based on a VMware recommended protection mode and flow.
However, there is still a gap in performance:
1. the protection performance of a single virtual machine of some products is good, but the performance of a plurality of concurrent machines is sharply reduced. Some products have good concurrent protection performance of multiple virtual machines, and the performance of a single virtual machine is poor;
2. some products require additional configuration of the maximum number of tasks that a single VMware platform can concurrently run. However, it is not clear to the user how good the choice is, and depending on the deployment environment, the choice will be different in order to achieve the best performance; some products need to configure the read-write cache size of a virtual disk in a VMware virtual machine, however, users cannot set the read-write cache size uniformly, and need to test out an optimal value in each deployment environment, and the optimal value is not constant and needs to be adjusted;
in addition, the configuration of the maximum task number and the read-write disk cache size is modified, the protection server needs to be restarted to take effect in many times, the running protection tasks and the user experience are influenced, and the performance difference is very large depending on the maximum protection task number and the disk read-write cache size, so that the user experience is seriously influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a virtual machine protection system and an implementation method thereof, so as to achieve the purpose of high-performance protection of a VMware virtual machine.
To achieve the above object, the present invention provides a virtual machine protection system, including:
the virtual machine protection server is used for storing a rule for protecting the virtual machine and processing most management work for protecting the virtual machine, and comprises a virtual platform, the virtual machine, the rule for managing the virtual machine protection and the operation of a scheduling rule, wherein the virtual platform is managed, a snapshot is created for the virtual machine to be protected, the configuration of a source virtual machine and disk information are acquired and stored in the disaster recovery server, data block information to be protected of a disk is acquired and stored in the disaster recovery server, meanwhile, the cache size of the disk data of the virtual machine during transmission is distributed, the task of the disaster recovery server is started for disk data transmission, and after the disk data transmission is finished, the snapshot is cleared, the cache of the completed task is recovered, and the cache size of other running tasks is recalculated and updated;
and the disaster recovery server is used for acquiring and storing the virtual machine configuration information and the to-be-protected disk data block information in the task, and transmitting and storing the data of the to-be-protected disk data block information according to the cache size allocated by the virtual machine protection server when receiving the task of starting the disk data transmission of the disaster recovery server.
Preferably, the virtual machine protection server further includes:
the snapshot creating unit is used for acquiring a task virtual machine corresponding to a task by calling a virtual platform interface of a source virtual platform and creating a snapshot for the virtual machine to be protected by the source virtual platform when a virtual machine protection task request is received;
the configuration information acquisition unit is used for acquiring all configurations and disk information of the corresponding virtual machine according to the snapshot by calling a virtual platform interface of the source virtual platform;
the configuration information storage unit is used for storing all configurations and disk information of the virtual machine corresponding to the source virtual platform to the disaster recovery server by calling the disaster recovery server interface;
the device comprises a to-be-protected data block information acquisition unit, a to-be-protected data block information acquisition unit and a to-be-protected data block information acquisition unit, wherein the to-be-protected data block information acquisition unit is used for acquiring to-be-protected data block information of a disk of a virtual machine corresponding to a source virtual platform according to a snapshot by calling a virtual platform interface of the source virtual platform;
the data block information to be protected storage unit is used for storing the data block information to be protected of the magnetic disk of the corresponding virtual machine to the disaster recovery server by calling the disaster recovery server interface;
the buffer size distribution unit is used for distributing the buffer size of the disk data transmission in the virtual machine protection task at this time;
and the disaster recovery server data transmission task starting unit is used for informing the disaster recovery server of disk data transmission by calling the remote management interface.
Preferably, the buffer size allocation unit further includes:
the initialization module is used for judging whether a source virtual platform registered on the virtual machine protection server is initialized or not, entering the host cache size acquisition module if the source virtual platform is initialized, and initializing and allocating a memory with a preset size to a host where the virtual machine is located if the source virtual platform is not initialized;
the host cache size acquisition module is used for acquiring the residual cache size of the host where the virtual machine is located;
and the host cache size judging and processing module is used for judging whether the host cache size is smaller than the reserved memory, if not, half of the remaining host cache is allocated to the virtual machine protection task, the remaining host cache is halved, and if the remaining host cache is smaller than the reserved memory, the host sleeps for a plurality of times, waits for other tasks to release the cache, and returns to judge whether the host cache size is smaller than the reserved memory.
Preferably, the virtual machine protection server further includes a cache recovery unit, configured to recover, when the data transmission task ends, the cache used by the task.
Preferably, the cache recycling unit includes:
the data transmission task detection module is used for continuously detecting whether a data transmission task is finished, starting the recovery module if the data transmission task is finished, and otherwise, continuously detecting whether the data transmission task is finished after sleeping for a plurality of times;
the recovery module is used for finding out the virtual platform and the host where the task virtual machine is located, recovering the cache used by the task, and adding the cache into the rest cache of the host;
and the cache updating module is used for judging whether the virtual machine protection task on the host is transmitted, if so, acquiring half of the remaining cache of the host, equally distributing the acquired cache to the virtual machine protection task which is being transmitted, and updating the increased cache to each transmission task on the disaster recovery server.
Preferably, the disaster recovery server further includes:
the virtual machine configuration information and to-be-protected data block information storage unit is used for storing the virtual machine configuration information in the task transmitted by the virtual machine protection server and the to-be-protected disk data block information;
the task management unit is used for managing all disk data transmission tasks on the disaster recovery server;
and the virtual machine disk data transmission and storage unit is used for calling the interface to read and store the disk data of the source virtual platform according to the cache size distributed by the virtual machine protection server and the disk data block information to be protected.
Preferably, the virtual machine disk data transmission and storage unit includes:
the disk acquisition module is used for acquiring the disk and the data change block list information thereof;
the judging module is used for judging whether the data change block list information of the current disk is processed, if so, returning to the disk obtaining module, and otherwise, entering the cache size updating judging module;
the cache size updating and judging module is used for judging whether the cache size of the data transmission is updated or not, if not, the data transmission module is accessed, and if yes, the cache size of the data transmission is updated;
and the data transmission module reads and stores the data block pointed by the change block from the source virtual platform by using the corresponding cache size, and returns to the judgment module after the current change block is processed.
In order to achieve the above object, the present invention further provides a virtual machine protection method, including the following steps:
step S1, receiving a virtual machine protection task request, creating a snapshot for the virtual machine to be protected by the virtual machine protection server according to the task request, acquiring the configuration of the source virtual machine and the disk information according to the created snapshot and storing the configuration and the disk information to the disaster recovery server, and acquiring the data block information to be protected of the disk and storing the data block information to the disaster recovery server;
step S2, the virtual machine protection server allocates large cache in the virtual machine protection task when the disk data is transmitted, and starts the disaster recovery server task to transmit the disk data;
step S3, when the disaster recovery server receives the task of starting the disk data transmission of the disaster recovery server, the data transmission and storage of the disk data block information to be protected are carried out according to the buffer size distributed by the virtual machine protection server;
step S4, the virtual machine protection server clears the snapshot after the disk data transmission is completed, recovers the cache of the completed task, and recalculates and updates the cache size of the other running tasks.
Preferably, the step of allocating, by the virtual machine protection server, the buffer size when the disk data is transmitted in the virtual machine protection task further includes:
step S200a, determining whether the virtual platform of the disaster recovery server has been initialized, if so, entering, and if not, initializing and allocating a memory of a preset size to the host where the virtual machine is located, and reserving a plurality of memories;
step S200b, obtaining the residual cache size of the host where the virtual machine is located;
step S200c, determining whether the host buffer size is smaller than the reserved memory, if not, allocating half of the remaining host buffer to the virtual machine protection task, and if so, sleeping for a certain time, waiting for other tasks to release the buffer, and returning to determine whether the host buffer size is smaller than the reserved memory.
Preferably, the step S4 further includes:
step S400, detecting whether a data transmission task is finished, if so, entering step S401, otherwise, after sleeping for a plurality of times, returning to continuously detect whether the data transmission task is finished;
step S401, finding out a virtual platform and a host where a task virtual machine is located, recovering a cache used by the task, and adding the cache into the rest caches of the host;
step S402, determining whether there is a virtual machine protection task on the host that is being transmitted, if yes, obtaining half of the remaining cache of the host, averagely distributing the obtained cache to the virtual machine protection task that is being transmitted, updating the added cache to each transmission task on the disaster recovery server, and returning to step S400, otherwise, directly returning to step S400.
Compared with the prior art, the invention has the following beneficial effects:
1. in the invention, the cache of the VMware ESXi host can be maximally utilized. By using NBD mode transmission, the speed of 200MB per second can be achieved by actual measurement when ten-trillion network and 4 virtual machines are concurrently protected.
2. The invention does not need to configure the number of the tasks which are simultaneously and concurrently sent by each virtual platform. The number of concurrent tasks of each platform is automatically completed by the cache allocation module. The optimized allocated cache achieves optimized task execution. The training and use cost of the user is reduced, and the user experience is greatly improved.
3. According to the invention, the task cache size does not need to be configured, the cache size of each task is optimally controlled by the cache allocation module, the user training and use cost is reduced, and the user experience is greatly improved.
4. The invention protects the effective data block and saves transmission and storage.
5. The invention is based on the periodic strategy, can flexibly set the protection time for automatic protection, and realizes a more flexible protection strategy by setting the total amount, difference or increment protection.
6. In the invention, the backup server does not depend on an operating system platform, and both a Windows platform and a Unix-like platform are available.
7. In the invention, the control machine server, the virtual machine protection server and the backup machine server can be flexibly configured, thereby realizing a high-performance system which is scalable and easy to expand.
8. Based on the framework of the invention, the virtual machine protection based on the Hyper-v virtual platform, the kvm virtual platform, other virtual platforms and the cloud platform can be realized.
9. The invention can quickly check the correctness of the backup data, so that a user is relieved, and the condition that the backup data cannot be used when the user wants to recover can not occur.
Drawings
FIG. 1 is a system architecture diagram of a virtual machine protection system according to the present invention;
FIG. 2 is a detailed structure diagram of a virtual machine protection server according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating information of a data block to be protected according to an embodiment of the present invention;
fig. 4 is a detailed structural diagram of the disaster recovery server in the embodiment of the present invention;
FIG. 5 is a flowchart illustrating steps of a method for protecting a virtual machine according to the present invention;
FIG. 6 is a flowchart illustrating a method for protecting a virtual machine according to an embodiment of the present invention;
FIG. 7 is a flow chart illustrating allocation of cache size during disk data transmission according to an embodiment of the present invention;
FIG. 8 is a flowchart illustrating cache reclamation and update according to an 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.
Fig. 1 is a system architecture diagram of a virtual machine protection system according to the present invention. As shown in fig. 1, the present invention provides a virtual machine protection system, which includes:
the virtual machine protection server 10 is configured to store a rule for protecting a virtual machine, process most of management work for protecting the virtual machine, including managing a virtual platform and a virtual machine thereof, managing the rule for protecting the virtual machine, and scheduling the operation of the rule, create a snapshot for the virtual machine to be protected, obtain configuration of a source virtual machine and disk information, store the configuration and the disk information in a disaster recovery server, obtain data block information to be protected of a disk, store the data block information in the disaster recovery server, allocate a cache size of the virtual machine during disk data transmission, start a task of the disaster recovery server to perform disk data transmission, clear the snapshot after the disk data transmission is completed, recover a cache of a completed task, and recalculate and update a cache size of other tasks being operated.
Specifically, as shown in fig. 2, the virtual machine protection server 10 further includes:
the snapshot creating unit 101 is configured to, when executing a virtual machine protection task according to a virtual machine rule, obtain a task virtual machine corresponding to the task by calling a virtual platform interface of a source virtual platform, and create a snapshot for a virtual machine to be protected by the source virtual platform. In an embodiment of the present invention, the source virtual platform is a VMware virtualization platform, which has a plurality of virtual machines thereon, the VMware virtualization platform provides a VADP (VMware vStorage API for Data protection) interface, and the snapshot creating unit 101 creates a snapshot on the virtual machine to be protected through the VADP interface.
The configuration information obtaining unit 102 is configured to obtain all configurations and disk information of the corresponding virtual machine according to the snapshot by calling a virtual platform interface (VADP interface) of the source virtual platform.
And the configuration information storage unit 103 is configured to store all configurations and disk information of the virtual machine corresponding to the source virtual platform to the disaster recovery server by calling the disaster recovery server interface.
The to-be-protected data Block information obtaining unit 104 is configured to obtain, by calling a virtual platform interface of a source virtual platform, to-be-protected data Block information (such as a location and a size of a data Block) of a disk of a virtual machine corresponding to the source virtual platform according to a snapshot, obtain all valid data Block information during full backup, and obtain changed data Block information during incremental backup based on a VMware change Block tracking cbt (changed Block tracking) technology. In an embodiment of the present invention, the information of the data block to be protected, which is obtained by the information obtaining unit 104 of the data block to be protected, is shown in fig. 3.
And the to-be-protected data block information storage unit 105 is configured to store the to-be-protected data block information of the disk of the corresponding virtual machine to the disaster recovery server by calling the disaster recovery server interface.
The buffer size allocating unit 106 is configured to allocate a buffer size when the disk data in the virtual machine protection task is transmitted. In the specific embodiment of the invention, one esxi host in one VMware virtualization platform has at most 32MB cache, so that the size of the cache allocated to each task cannot exceed 32MB in sum.
Specifically, the buffer size allocation unit 106 further includes:
the initialization module is used for judging whether a source virtual platform registered on the virtual machine protection server is initialized or not, entering the host cache size acquisition module if the source virtual platform is initialized, and initializing and allocating a memory with a preset size to a host where the virtual machine is located if the source virtual platform is not initialized, and reserving a plurality of memories for NFC connection. It should be noted that the source virtual platform needs to be registered to the virtual machine protection server, and then the virtual machine protection server can manage the virtual platform, which is not described herein again.
In the VMware VADP interface of the virtual platform, a virtual Disk Development kit vddk (virtual Disk Development kit) is used for managing the virtual Disk and realizing the protection of data. For the interface of disk data remote read-write in VDDK, VMware is realized by using NFC (network File copy) protocol, and each VMware ESxi virtual machine provides a total of 32M cache to support NFC. Thus, in an embodiment of the present invention, 28M memory is initially allocated to each host on the virtual platform. A total of 4M memory is reserved for NFC connections.
In an embodiment of the present invention, the initialization is 28M, and generally, one VMWare virtualization platform has one or more ESXi hosts, and each ESXi host has a plurality of virtual machines.
And the host cache size judgment processing module is used for judging whether the host cache size is smaller than a reserved memory (4M in the embodiment), if not, allocating half of the remaining host cache to the virtual machine protection task, halving the remaining host cache, and if the remaining host cache size is smaller than the reserved memory, sleeping for a plurality of times, waiting for other tasks to release the cache, and returning to judge whether the host cache size is smaller than the reserved memory.
A data transmission task starting unit 107 of the disaster recovery server, configured to notify the disaster recovery server to perform disk data transmission by calling a remote management interface (i.e., a disaster recovery server interface), that is, the virtual machine protection server calls the interface of the disaster recovery server, start a data transmission task at the disaster recovery server, and the disaster recovery server uses the interface of the source virtual platform, and reads disk data from the source virtual platform and stores the disk data in the disaster recovery server.
Preferably, the virtual machine protection server 10 further includes:
and the buffer recovery unit is used for recovering the buffer used by the task when the data transmission task is finished.
Specifically, the cache recycling unit further includes:
the data transmission task detection module is used for continuously detecting whether a data transmission task is finished, entering the recovery module if the data transmission task is finished, and otherwise, continuously detecting whether the data transmission task is finished after sleeping for a plurality of times;
the recovery module is used for finding out the virtual platform and the host where the task virtual machine is located, recovering the cache used by the task, and adding the cache into the rest cache of the ESxi host;
and the cache updating module is used for judging whether the virtual machine protection task on the host is transmitted, if so, acquiring half of the remaining cache of the host, equally distributing the acquired cache to the virtual machine protection task which is being transmitted, and updating the increased cache to each transmission task on the disaster recovery server.
And the disaster recovery server 20, which belongs to a VMware VDDK development kit, is configured to acquire and store the virtual machine configuration information and the to-be-protected disk data block information in the task, and transmit and store data of the to-be-protected disk data block information according to the size of the cache allocated by the virtual machine protection server 10 when receiving the task of starting disk data transmission of the disaster recovery server.
Specifically, as shown in fig. 4, the disaster recovery server 20 further includes:
a virtual machine configuration information and to-be-protected data block information storage unit 201, configured to store the virtual machine configuration information and to-be-protected disk data block information in the task transmitted by the virtual machine protection server 10.
The task management unit 202 is configured to manage all disk data transmission tasks on the disaster recovery server, including task state, transmission progress, task stopping, bandwidth control, and the like. That is, when receiving the disk data transmission task notification from the data transmission task starting unit 107 of the disaster recovery server, the disaster recovery server calls an interface, that is, an interface of the source virtual platform, reads the disk data from the source virtual platform, and then stores the disk data on the disaster recovery server, which is called a disk data transmission task, and in the disk data transmission process, the task management unit 202 manages the disk data transmission task on the disaster recovery server.
The virtual machine disk data transmission and storage unit 203 is configured to call an interface to read and store disk data of a source virtual platform, that is, the virtual machine disk data transmission and storage unit 203 transmits and stores data according to the cache size allocated by the virtual machine protection server 10 and disk data block information to be protected.
Specifically, the virtual machine disk data transmission and storage unit 203 specifically includes:
the disk acquisition module is used for acquiring the disk and the data change block list information thereof;
the judging module is used for judging whether the data change block list information of the current disk is processed, if so, returning to the disk obtaining module, and otherwise, entering the cache size updating judging module;
the cache size updating and judging module is used for judging whether the cache size of the data transmission is updated or not, if not, the data transmission module is accessed, and if yes, the cache size of the data transmission is updated;
and the data transmission module reads and stores the data block pointed by the change block from the source virtual platform by using the corresponding cache size, and returns to the judgment module after the current change block is processed, so that one change block can be read for many times.
Preferably, the system further includes a general control server module 30, which includes a user interface and a controller, the user interface provides an interface for user operation in a web page and client mode, and the controller provides management functions including various management of users, permissions, authorities, logs, history records, rules, virtual machine protection servers, target disaster recovery servers, and the like. That is, in the present invention, the grandmaster server module 30 provides an interface to manage the virtual machine rules, including creation, modification and manipulation. It should be noted that the rule is also stored in the virtual machine protection server, and the rule is scheduled in the virtual machine protection server. The operation of the rule is a task, the operation can be separated from the master control server and independently performed in the virtual machine protection server, and in addition, the master control server module can acquire the state of the rule from the virtual machine protection server and display the progress.
FIG. 5 is a flowchart illustrating steps of a method for protecting a virtual machine according to the present invention. As shown in fig. 5, the method for protecting a virtual machine of the present invention includes the following steps:
step S1, receiving a virtual machine protection task request, creating a snapshot for the virtual machine to be protected by the virtual machine protection server according to the task request, obtaining the configuration of the source virtual machine and the disk information according to the created snapshot, and storing the data block information to be protected by the disk to the disaster recovery server.
Step S1 further includes:
step S100, creating a snapshot for the virtual machine to be protected by the source virtual platform by calling the virtual platform interface of the source virtual platform. In an embodiment of the present invention, the source virtual platform is a VMware virtualization platform, which has a plurality of virtual machines thereon, the VMware virtualization platform provides a VADP (VMware vStorage API for Data protection) interface, and the snapshot creating unit 101 creates a snapshot on the virtual machine to be protected through the VADP interface.
Step S101, by calling a virtual platform interface of a source virtual platform, all configuration and disk information of a corresponding virtual machine are obtained according to the created snapshot.
Step S102, all configuration and disk information of the virtual machine corresponding to the source virtual platform are obtained and stored to the disaster recovery server by calling the disaster recovery server interface.
Step S103, acquiring data Block information of a disk of a virtual machine corresponding to a source virtual platform according to a snapshot by calling a virtual platform interface of the source virtual platform, acquiring all effective data Block information during full backup, and acquiring changed data Block information during incremental backup based on a VMware Changed Block Tracking (CBT) (changed Block tracking) technology.
And step S104, storing the data block information to be protected of the disk of the virtual machine corresponding to the source virtual platform to the disaster recovery server through the disaster recovery server interface.
Step S2, the virtual machine protection server allocates a large cache for disk data transmission in the virtual machine protection task, and starts the disaster recovery server to perform disk data transmission.
Specifically, step S2 further includes:
and step S200, distributing the buffer size of the disk data transmission in the virtual machine protection task.
Specifically, step S200 further includes:
step S200a, determine whether the virtual platform of the disaster recovery server has been initialized, if so, enter the process, and if not, initialize and allocate a memory of a preset size to the host where the virtual machine is located, and reserve a plurality of memories for NFC connection. It should be noted that the source virtual platform needs to be registered to the virtual machine protection server, and then the virtual machine protection server can manage the virtual platform, which is not described herein again
In the VMware VADP interface of the virtual platform, a virtual Disk Development kit vddk (virtual Disk Development kit) is used for managing the virtual Disk and realizing the protection of data. For the interface of disk data remote read-write in VDDK, VMware is realized by using NFC (network File copy) protocol, and each VMware ESxi virtual machine provides a total of 32M cache to support NFC. Thus, in an embodiment of the present invention, 28M memory is initially allocated to each host on the virtual platform. A total of 4M memory is reserved for NFC connections.
Step S200b, obtain the remaining cache size of the ESXi host where the virtual machine is located, in the embodiment of the present invention, the initialization time is 28M.
Step S200c, determine whether the host buffer size is smaller than the reserved memory (4M in this embodiment), if not, allocate half of the host remaining buffer to the virtual machine protection task, halve the host remaining buffer, if smaller, sleep for a certain time, wait for other tasks to release the buffer, and return to determine whether the host buffer size is smaller than the reserved memory.
Step S201, by calling a remote management interface (i.e. an interface of the disaster recovery server), notifying the disaster recovery server to perform disk data transmission, i.e. the virtual machine protection server calls the interface of the disaster recovery server, starting a data transmission task at the disaster recovery server, and using the interface of the source virtual platform by the disaster recovery server, reading disk data from the source virtual platform and storing the disk data in the disaster recovery server.
Step S3, when receiving the task of starting the disk data transmission of the disaster recovery server, the disaster recovery server transmits and stores the data of the disk data block information to be protected according to the size of the cache allocated by the virtual machine protection server.
Specifically, step S3 further includes:
step S300, the virtual machine configuration information and the disk data block information to be protected in the task transmitted by the virtual machine protection server are saved.
Step S301, according to the buffer size distributed by the virtual machine protection server and the disk data block information to be protected, data transmission and storage are carried out.
Specifically, step S301 further includes:
step S301a, acquiring the list information of the disk and the data change block;
step S301b, judging whether the current disk data change block list information is processed, if so, returning to step S301a, otherwise, entering step S301 c;
step S301c, judging whether the buffer size of the data transmission is updated, if not, entering step S301d, if yes, updating the buffer size of the data transmission;
step S301d, the data block pointed by the changed block is transferred and saved by using the buffer size, and the process returns to step S301b after the current changed block is processed.
Step S4, the virtual machine protection server clears the snapshot after the disk data transmission is completed, recovers the cache of the completed task, and recalculates and updates the cache size of the other running tasks.
Specifically, step S4 further includes:
step S400, detecting whether a data transmission task is finished, if the data transmission task is finished, entering step S401, otherwise, after sleeping for a plurality of times, returning to continuously detect whether the data transmission task is finished;
step S401, finding out the virtual platform and the host where the task virtual machine is located, recovering the cache used by the task, and adding the cache into the rest cache of the ESxi host;
step S402, determining whether there is a virtual machine protection task on the host that is being transmitted, if yes, obtaining half of the remaining cache of the host, averagely distributing the obtained cache to the virtual machine protection task that is being transmitted, updating the added cache to each transmission task on the disaster recovery server, and returning to step S400, otherwise, directly returning to step S400.
Examples
Fig. 6 is a flowchart of a process of protecting a virtual machine according to an embodiment of the present invention. As shown in fig. 6, in this embodiment, the virtual machine protection process includes:
In this embodiment, a flow chart of allocating the buffer size used for disk transmission of a virtual machine is shown in fig. 7, and the specific process is as follows:
step 1.1, applying for the cache size of disk transmission to the virtual machine protection task.
And step 1.2, judging whether the source virtual platform cache is initialized or not, and if so, jumping to step 1.4.
Step 1.3, 28M memory is initially allocated to each ESxi host on the source virtual platform. A total of 4M memory is reserved for NFC connections.
Step 1.4, obtaining the cache size of the ESxi host where the task virtual machine is located, wherein the cache size is 28M during initialization.
And step 1.5, judging whether the cache size of the host is smaller than 4M, if not, jumping to step 1.7, and if so, entering step 1.6.
And step 1.6, sleeping for 3 seconds, waiting for other tasks to release the cache, and jumping to the step 1.5.
And step 1.7, distributing half of the residual cache of the host to the task, and halving the residual cache of the host.
And 2, snapshot is conducted on the virtual machine pointed by the task.
And step 3, obtaining the configuration and the disk information corresponding to the virtual machine snapshot.
And 4, sending the configuration, the disk and the backup information to a disaster recovery server for storage.
And 5, acquiring the information of the data block to be protected of each disk.
And 6, sending the data block information to be protected to a disaster recovery server for storage.
And 7, starting a transmission task by the disaster recovery server to transmit the disk data.
And 8, judging whether all the disk lists of the virtual machine are processed or not, and if so, jumping to the step 15.
And 9, acquiring the list information of the disk and the data change blocks thereof.
And step 10, judging whether the change block list is processed or not, and jumping to the step 8 if the change block list is processed.
And step 11, judging whether the cache size of the data transmission is updated, and jumping to step 13 if not.
And step 12, updating the buffer size of data transmission.
And step 13, transmitting and storing the data block pointed by the change block by using the cache size.
And 14, judging whether the current change block is processed or not, and jumping to the step 10 if the current change block is processed. Otherwise jump to step 13.
And step 15, completing the task transmission of the disaster recovery server, and updating the task state and the progress.
And step 16, the virtual machine protection server detects that the transmission task is finished.
And step 17, the virtual machine protection server recovers the task cache and updates the caches of other tasks being transmitted.
In this embodiment, a flowchart of cache reclamation and update is shown in fig. 8, and the specific process is as follows:
and step 17.1, detecting whether a data transmission task is finished, and if so, jumping to the step 3.
Step 17.2, return to step 17.1 after sleeping for 5 seconds.
And step 17.3, finding the platform and the ESxi host where the task virtual machine is located.
And step 17.4, recovering the cache used by the task and adding the cache into the rest caches of the ESxi host.
And step 17.5, judging whether the virtual machine task on the host is transmitting or not, and if not, returning to the step 17.1.
And step 17.6, acquiring half of the rest cache of the ESxi host, and halving the rest cache.
And step 17.7, averagely distributing the acquired cache to the virtual machine task which is being transmitted.
And step 17.8, updating the added cache to each transmission task on the disaster recovery server.
And step 18, the virtual machine protection server clears the snapshot and sends statistical information.
And step 19, completing the task.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit 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 virtual machine protection system, comprising:
the virtual machine protection server is used for storing virtual machine protection rules and processing most management work protected by the virtual machine, and comprises a virtual platform, the virtual machine protection rules and scheduling rule operation management, creating a snapshot for the virtual machine to be protected, acquiring configuration of a source virtual machine and disk information, storing the configuration and disk information to the disaster recovery server, acquiring data block information to be protected of a disk, storing the data block information to the disaster recovery server, distributing the cache size of the virtual machine during disk data transmission, starting a task of the disaster recovery server to transmit the disk data, clearing the snapshot after the disk data transmission is finished, recovering the cache of the completed task, recalculating and updating the cache size of other tasks in operation;
and the disaster recovery server is used for acquiring and storing the virtual machine configuration information and the to-be-protected disk data block information in the task, and transmitting and storing the data of the to-be-protected disk data block information according to the cache size allocated by the virtual machine protection server when receiving the task of starting the disk data transmission of the disaster recovery server.
2. The virtual machine protection system of claim 1, wherein the virtual machine protection server further comprises:
the snapshot creating unit is used for acquiring a task virtual machine corresponding to a task by calling a virtual platform interface of a source virtual platform and creating a snapshot for the virtual machine to be protected by the source virtual platform when a virtual machine protection task request is received;
the configuration information acquisition unit is used for acquiring all configurations and disk information of the corresponding virtual machine according to the snapshot by calling a virtual platform interface of the source virtual platform;
the configuration information storage unit is used for storing all configurations and disk information of the virtual machine corresponding to the source virtual platform to the disaster recovery server by calling the disaster recovery server interface;
the device comprises a to-be-protected data block information acquisition unit, a to-be-protected data block information acquisition unit and a to-be-protected data block information acquisition unit, wherein the to-be-protected data block information acquisition unit is used for acquiring to-be-protected data block information of a disk of a virtual machine corresponding to a source virtual platform according to a snapshot by calling a virtual platform interface of the source virtual platform;
the data block information to be protected storage unit is used for storing the data block information to be protected of the magnetic disk of the corresponding virtual machine to the disaster recovery server by calling the disaster recovery server interface;
the buffer size distribution unit is used for distributing the buffer size of the disk data transmission in the virtual machine protection task at this time;
and the disaster recovery server data transmission task starting unit is used for informing the disaster recovery server of disk data transmission by calling the remote management interface.
3. The virtual machine protection system according to claim 2, wherein the buffer size allocation unit further comprises:
the initialization module is used for judging whether a source virtual platform registered on the virtual machine protection server is initialized or not, entering the host cache size acquisition module if the source virtual platform is initialized, and initializing and allocating a memory with a preset size to a host where the virtual machine is located if the source virtual platform is not initialized;
the host cache size acquisition module is used for acquiring the residual cache size of the host where the virtual machine is located;
and the host cache size judging and processing module is used for judging whether the host cache size is smaller than the reserved memory, if not, half of the remaining host cache is allocated to the virtual machine protection task, the remaining host cache is halved, and if the remaining host cache is smaller than the reserved memory, the host sleeps for a plurality of times, waits for other tasks to release the cache, and returns to judge whether the host cache size is smaller than the reserved memory.
4. The virtual machine protection system according to claim 3, wherein the virtual machine protection server further comprises a cache recycling unit configured to recycle the cache used by the data transmission task when the data transmission task is finished.
5. The virtual machine protection system according to claim 4, wherein the cache reclamation unit includes:
the data transmission task detection module is used for continuously detecting whether a data transmission task is finished, starting the recovery module if the data transmission task is finished, and otherwise, continuously detecting whether the data transmission task is finished after sleeping for a plurality of times;
the recovery module is used for finding out the virtual platform and the host where the task virtual machine is located, recovering the cache used by the task, and adding the cache into the rest cache of the host;
and the cache updating module is used for judging whether the virtual machine protection task on the host is transmitted, if so, acquiring half of the remaining cache of the host, equally distributing the acquired cache to the virtual machine protection task which is being transmitted, and updating the increased cache to each transmission task on the disaster recovery server.
6. The virtual machine protection system of claim 5, wherein the disaster recovery server further comprises:
the virtual machine configuration information and to-be-protected data block information storage unit is used for storing the virtual machine configuration information in the task transmitted by the virtual machine protection server and the to-be-protected disk data block information;
the task management unit is used for managing all disk data transmission tasks on the disaster recovery server;
and the virtual machine disk data transmission and storage unit is used for calling the interface to read and store the disk data of the source virtual platform according to the cache size distributed by the virtual machine protection server and the disk data block information to be protected.
7. The virtual machine protection system of claim 6, wherein the virtual machine disk data transmission and storage unit comprises:
the disk acquisition module is used for acquiring the disk and the data change block list information thereof;
the judging module is used for judging whether the data change block list information of the current disk is processed, if so, returning to the disk obtaining module, otherwise, entering the cache size updating judging module;
the cache size updating and judging module is used for judging whether the cache size of the data transmission is updated or not, if not, the data transmission module is accessed, and if yes, the cache size of the data transmission is updated;
and the data transmission module reads and stores the data block pointed by the change block from the source virtual platform by using the corresponding cache size, and returns to the judgment module after the current change block is processed.
8. A virtual machine protection method comprises the following steps:
step S1, receiving a virtual machine protection task request, creating a snapshot for the virtual machine to be protected by the virtual machine protection server according to the task request, acquiring the configuration of the source virtual machine and the disk information according to the created snapshot and storing the configuration and the disk information to the disaster recovery server, and acquiring the data block information to be protected of the disk and storing the data block information to the disaster recovery server;
step S2, the virtual machine protection server allocates the buffer size of the disk data transmission in the virtual machine protection task, and starts the disaster recovery server task to transmit the disk data;
step S3, when the disaster recovery server receives the task of starting the disk data transmission of the disaster recovery server, the data transmission and storage of the disk data block information to be protected are carried out according to the buffer size distributed by the virtual machine protection server;
step S4, the virtual machine protection server clears the snapshot after the disk data transmission is completed, recovers the cache of the completed task, and recalculates and updates the cache size of the other running tasks.
9. The virtual machine protection method according to claim 8, wherein the step of allocating, by the virtual machine protection server, the buffer size for disk data transmission in the virtual machine protection task further comprises:
step S200a, determining whether the virtual platform of the disaster recovery server has been initialized, if so, entering, and if not, initializing and allocating a memory of a preset size to the host where the virtual machine is located, and reserving a plurality of memories;
step S200b, obtaining the residual cache size of the host where the virtual machine is located;
step S200c, determining whether the host buffer size is smaller than the reserved memory, if not, allocating half of the remaining host buffer to the virtual machine protection task, and if so, sleeping for a certain time, waiting for other tasks to release the buffer, and returning to determine whether the host buffer size is smaller than the reserved memory.
10. The virtual machine protection method according to claim 9, wherein the step S4 further comprises:
step S400, detecting whether a data transmission task is finished, if so, entering step S401, otherwise, after sleeping for a plurality of times, returning to continuously detect whether the data transmission task is finished;
step S401, finding out a virtual platform and a host where a task virtual machine is located, recovering a cache used by the task, and adding the cache into the rest caches of the host;
step S402, determining whether there is a virtual machine protection task on the host that is being transmitted, if yes, obtaining half of the remaining cache of the host, averagely distributing the obtained cache to the virtual machine protection task that is being transmitted, updating the added cache to each transmission task on the disaster recovery server, and returning to step S400, otherwise, directly returning to step S400.
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