CN102662751B - A kind of method improving based on thermophoresis dummy machine system availability - Google Patents
A kind of method improving based on thermophoresis dummy machine system availability Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001089 thermophoresis Methods 0.000 title claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 claims abstract description 22
- 230000003111 delayed effect Effects 0.000 claims abstract description 7
- 238000013508 migration Methods 0.000 claims description 4
- 230000005012 migration Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000000872 buffer Substances 0.000 claims description 3
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Abstract
The invention provides the method for a kind of raising based on thermophoresis dummy machine system availability, first before starting host virtual machine, host virtual machine image file on source server is copied on backup server, now just open dummy machine system, system can be opened operation by source virtual machine on master server, on backup server, will switch to halted state for virtual machine, and start synchronization engine on backstage, carry out heartbeat inspecting, high-frequency thermophoresis and synchronous mirror file, the machine once the virtual machine on discovery master server is delayed, immediately the standby virtual machine on backup server is returned to running status from halted state, service is outwards provided, the height of realizing virtual machine is available.
Description
Technical field
The present invention relates to computer virtual machine technology field, specifically a kind of method improving based on thermophoresis dummy machine system availability.
Background technology
Along with the develop rapidly of computer and network technologies, especially the appearance of polycaryon processor rapidly promotes the performance of physical machine, but traditional occupation mode often fails to make full use of the ability of physical machine, so there is Intel Virtualization Technology, it can move multiple virtual computer systems (abbreviation virtual machine) on single physical machine, has greatly improved the utilization rate of physical machine. Utilize in addition Intel Virtualization Technology to realize the encapsulation to software, can shield the impact that the hardware of isomery brings software, the operation that the multiple virtual machines that move on Same Physical machine can be independent of each other, this has just improved security and the manageability of software.
On market, traditional high-availability system is all available for the height of application, and all needs extra script to monitor to the Gao Keyong of application, and the script of different application monitoring is also different, and this has just brought inconvenience to the widespread adoption of high-availability system. By Intel Virtualization Technology, concrete application is encapsulated into virtual machine inside, can be used to ensure that by the height of virtual machine the height of virtual machine in house software is available, so just without the application of being concerned about that virtual machine inside varies. The height that has ensured virtual machine is available, has just ensured that the height of virtual machine internal applications is available, and this is the high available a kind of new thinking that provides of software.
Existing virtual machine high-availability system, is all the image file of depositing virtual machine by sharing, does not so just need extra means to ensure the inconsistence problems of the memory image on different machines. After the virtual machine on main frame is delayed machine, on standby host, restart again virtual machine according to image file. This mode restarting, is the easiest implementation, but the startup of virtual machine needs the time, and this has just caused the downtime of service longer.
Summary of the invention
The object of this invention is to provide the method for a kind of raising based on thermophoresis dummy machine system availability.
The object of the invention is to realize in the following manner, the nucleus module of whole system is synchronization engine, and synchronization engine is divided into three parts: check whether fault of host virtual machine by heartbeat inspecting; Realize the synchronous of internal memory by thermophoresis; Realize memory image synchronous of active and standby machine by the snapshot of mirror image;
The heartbeat inspecting of synchronization engine: along with the operation of virtual machine, when its content modification is to a certain extent time, will in disk mirroring, write back data, the data in magnetic disk that heartbeat inspecting module is responsible for monitoring host virtual machine writes back, once discovery disk writes back and occurs that time delay or the time of exceeding the estimates do not have data to write back toward disk, assert that this virtual machine breaks down, immediately backup virtual machine is recovered from the state suspending, service is outwards provided, take over the virtual machine of fault, thereby realize the failover of virtual machine;
The thermophoresis module of synchronization engine: so-called live migration of virtual machine, exactly the virtual machine of running status being moved to destination server from source server moves, in this process, virtual machine is substantially without stopping running, by the memory information of the virtual machine of source server end, be copied to destination server by network iteration, the process need of this iteration is carried out repeatedly until the internal storage data of both sides virtual machine is almost consistent, now the virtual machine of source server end is closed, and destination server end virtual machine is opened, whole process is called the thermophoresis of virtual machine, in this article, by the internal storage data of host virtual machine ceaselessly iteration be copied in backup virtual machine, the internal storage data of realizing active and standby virtual machine is synchronous, in addition in order to receive the internal storage data of synchronously coming, backup virtual machine can not be closed, should be in halted state, in the middle of all data terminate-and-stay-residents, once host virtual machine fault, backup virtual machine is directly switch to running status from halted state, this handoff procedure is very of short duration, this also just shortens the switching time of virtual-machine fail greatly,
The mirror image synchronization module of synchronization engine, exactly the file that at every turn writes back host virtual machine disk mirroring is carried out to snapshot one time, then snapshot is synchronized to backup virtual machine end, then backup virtual machine regularly by snapshot restore to disk mirroring, thereby realize disk mirroring synchronous of active and standby virtual machine, what mirror snapshot was preserved is the revised context of virtual machine image, it is the preserving type based on increment, so the synchronous time can be not oversize, there is a memory buffers at backup virtual machine end in addition, the snapshot that backup is come reaches certain degree and recovers to raise the efficiency again,
The system building method of the virtual machine based on thermophoresis is as follows: first before starting host virtual machine, host virtual machine image file on source server is copied on backup server, now just open dummy machine system, system can be opened operation by source virtual machine on master server, on backup server, will switch to halted state for virtual machine, and start synchronization engine on backstage, carry out heartbeat inspecting, high-frequency thermophoresis and synchronous mirror file, the machine once the virtual machine on discovery master server is delayed, immediately the standby virtual machine on backup server is returned to running status from halted state, service is outwards provided, the height of realizing virtual machine is available,
Specifically comprise the following steps:
(1) first select a backup physical server, create the backup virtual machine of source virtual machine, backup virtual machine is in non-active state;
(2) source virtual machine is realized to snapshot, preserve internal storage data;
(3) by synchronization engine, snapshot data is sent to the backup virtual machine that backs up physical server;
(4) backup virtual machine synchronisation snapshot data;
(5) high-frequency execution step 2,3,4;
(6) in the time that fault occurs, backup virtual machine transfers active state to.
By the thermophoresis of virtual machine frequently, be synchronously positioned at two virtual machines on physical server, its data are consistent.
High available realization is left intact to the data of virtual machine inside, completely transparent to the application of virtual machine inside.
Share without adopting the image file of depositing virtual machine, be synchronously positioned at the image file of virtual machine in different physical machine by the mode of mirror snapshot, thereby improve availability.
The invention has the beneficial effects as follows: the present invention is directed to by sharing storage, restart the virtual machine high-availability system that the mode of virtual machine realizes, propose a kind of virtual machine high-availability system and its implementation based on thermophoresis.
Existing virtual machine high-availability system is all by using shared storage device, and main frame and standby host can be accessed identical virtual machine image file and be realized high available. In the present invention, by the mode of Network Synchronization, after the image file of virtual machine changes, first write back local disk, then by the mode of snapshot, the increment of amendment is arrived to backup machine by Network Synchronization, backup machine returns snapshot restore to disk again, and this process is synchronously carried out, and has so just ensured the uniformity of the memory image of the active and standby machine in strange land. And such Network Synchronization mode does not need to use shared storage device yet, save hardware costs.
Existing virtual machine high-availability system is after the virtual machine on main frame is delayed machine, on standby host, restarts. Just caused the start-up time of new virtual machine the service of virtual machine inside will inevitably produce interruption, and the time is longer. In the present invention, by live migration of virtual machine frequently, remain on virtual machine on standby host in halted state, instead of stopped status. After the virtual machine on main frame is delayed machine, the virtual machine on standby host directly proceeds to running status from halted state, and the time is almost negligible, thereby it is available to have realized the real machine of not delaying height.
Brief description of the drawings
Accompanying drawing 1 is virtual machine high-availability system configuration diagram;
Accompanying drawing 2 is disk synchronization principles schematic diagram in virtual machine high-availability system.
Detailed description of the invention
With reference to Figure of description, method of the present invention is described in detail below.
As shown in Figure 1, the nucleus module of whole system is synchronization engine to configuration diagram of the present invention. Synchronization engine is divided into three parts: check whether fault of host virtual machine by heartbeat inspecting; Realize the synchronous of internal memory by thermophoresis; Realize memory image synchronous of active and standby machine by the snapshot of mirror image.
The heartbeat inspecting of paper synchronization engine: along with the operation of virtual machine, when its content modification is to a certain extent time, will write back data in disk mirroring. The data in magnetic disk that heartbeat inspecting module is responsible for monitoring host virtual machine writes back, once discovery disk writes back and occurs that time delay or the time of exceeding the estimates do not have data to write back toward disk, we just can assert that this virtual machine breaks down, immediately backup virtual machine is recovered from the state suspending, service is outwards provided, take over the virtual machine of fault, thereby realize the failover of virtual machine.
The thermophoresis module of synchronization engine: so-called live migration of virtual machine, exactly the virtual machine of running status is moved to destination server from source server and move, in this process, virtual machine is substantially without stopping running. Its principle is by the memory information of the virtual machine of source server end, be copied to destination server by network iteration, the process need of this iteration is carried out repeatedly until the internal storage data of both sides virtual machine is almost consistent, now the virtual machine of source server end is closed and the unlatching of destination server end virtual machine, whole process is called the thermophoresis of virtual machine. In the present invention, utilize its principle by the internal storage data of host virtual machine ceaselessly iteration be copied in backup virtual machine, the internal storage data of realizing active and standby virtual machine is synchronous. In addition in order to receive the internal storage data of synchronously coming, backup virtual machine can not be closed, should be in halted state, in the middle of all data terminate-and-stay-residents, once host virtual machine fault, backup virtual machine is directly switch to running status from halted state, and this handoff procedure is very of short duration, and this also just shortens the switching time of virtual-machine fail greatly.
The mirror image synchronization module of synchronization engine, exactly the file that at every turn writes back host virtual machine disk mirroring is carried out to snapshot one time, then snapshot is synchronized to backup virtual machine end, then backup virtual machine regularly by snapshot restore to disk mirroring, thereby disk mirroring synchronous of realizing active and standby virtual machine. What mirror snapshot was preserved is the revised context of virtual machine image, is the preserving type based on increment, so the synchronous time can be not oversize. Have a memory buffers at backup virtual machine end in addition, the snapshot that backup is come reaches certain degree and is recovering, and can raise the efficiency.
Virtual machine high-availability system building method based on thermophoresis is as follows: first before starting host virtual machine, host virtual machine image file on source server is copied on backup server, now just can open virtual machine high-availability system, system can be opened operation by source virtual machine on master server, on backup server, will switch to halted state for virtual machine. And start synchronization engine on backstage, carry out heartbeat inspecting, high-frequency thermophoresis and synchronous mirror file. The machine once the virtual machine on discovery master server is delayed, returns to running status by the standby virtual machine on backup server from halted state immediately, and service is outwards provided, and the height of realizing virtual machine is available.
Except the technical characterictic described in description, be the known technology of those skilled in the art.
Claims (4)
1. the method for raising based on thermophoresis dummy machine system availability, is characterized in that, the nucleus module of whole system is synchronization engine, and synchronization engine is divided into three parts: check whether fault of host virtual machine by heartbeat inspecting; Realize the synchronous of internal memory by thermophoresis; Realize memory image synchronous of active and standby machine by the snapshot of mirror image;
The heartbeat inspecting of synchronization engine: along with the operation of virtual machine, in the time that its content modification arrives setting degree, will in disk mirroring, write back data, the data in magnetic disk that heartbeat inspecting module is responsible for monitoring host virtual machine writes back, once discovery disk writes back and occurs that time delay or the time of exceeding the estimates do not have data to write back toward disk, assert that this virtual machine breaks down, immediately backup virtual machine is recovered from the state suspending, service is outwards provided, take over the virtual machine of fault, thereby realize the failover of virtual machine;
The thermophoresis module of synchronization engine: so-called live migration of virtual machine, exactly the virtual machine of running status being moved to destination server from source server moves, in this process, virtual machine is without stopping running, by the memory information of the virtual machine of source server end, be copied to destination server by network iteration, the process need of this iteration is carried out repeatedly until the internal storage data of both sides virtual machine is almost consistent, now the virtual machine of source server end is closed, and destination server end virtual machine is opened, whole process is called the thermophoresis of virtual machine, by the internal storage data of host virtual machine ceaselessly iteration be copied in backup virtual machine, the internal storage data of realizing active and standby virtual machine is synchronous, in addition in order to receive the internal storage data of synchronously coming, backup virtual machine can not be closed, should be in halted state, in the middle of all data terminate-and-stay-residents, once host virtual machine fault, backup virtual machine is directly switch to running status from halted state, this handoff procedure is very of short duration, this also just shortens the switching time of virtual-machine fail greatly,
The mirror image synchronization module of synchronization engine, exactly the file that at every turn writes back host virtual machine disk mirroring is carried out to snapshot one time, then snapshot is synchronized to backup virtual machine end, then backup virtual machine regularly by snapshot restore to disk mirroring, thereby realize disk mirroring synchronous of active and standby virtual machine, what mirror snapshot was preserved is the revised context of virtual machine image, it is the preserving type based on increment, so the synchronous time can be not oversize, there is a memory buffers at backup virtual machine end in addition, the snapshot that backup is come reaches certain degree and recovers to raise the efficiency again,
The system building method of the virtual machine based on thermophoresis is as follows: first before starting host virtual machine, host virtual machine image file on source server is copied on backup server, now just open dummy machine system, system can be opened operation by source virtual machine on master server, on backup server, will switch to halted state for virtual machine, and start synchronization engine on backstage, carry out heartbeat inspecting, high-frequency thermophoresis and synchronous mirror file, the machine once the virtual machine on discovery master server is delayed, immediately the standby virtual machine on backup server is returned to running status from halted state, service is outwards provided, the height of realizing virtual machine is available,
Specifically comprise the following steps:
(1) first select a backup physical server, create the backup virtual machine of source virtual machine, backup virtual machine is in non-active state;
(2) source virtual machine is realized to snapshot, preserve internal storage data;
(3) by synchronization engine, snapshot data is sent to the backup virtual machine that backs up physical server;
(4) backup virtual machine synchronisation snapshot data;
(5) high-frequency execution step 2,3,4;
(6) in the time that fault occurs, backup virtual machine transfers active state to.
2. method according to claim 1, is characterized in that, by the thermophoresis of virtual machine frequently, is synchronously positioned at two virtual machines on physical server, and its data are consistent.
3. method according to claim 1, is characterized in that, high available realization is left intact to the data of virtual machine inside, completely transparent to the application of virtual machine inside.
4. method according to claim 1, is characterized in that, shares without adopting the image file of depositing virtual machine, is synchronously positioned at the image file of virtual machine in different physical machine by the mode of mirror snapshot, thereby improves availability.
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