CN108664311B - Virtual machine migration control method and device - Google Patents
Virtual machine migration control method and device Download PDFInfo
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- CN108664311B CN108664311B CN201710206673.6A CN201710206673A CN108664311B CN 108664311 B CN108664311 B CN 108664311B CN 201710206673 A CN201710206673 A CN 201710206673A CN 108664311 B CN108664311 B CN 108664311B
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- G—PHYSICS
- 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
- 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
- G06F2009/4557—Distribution of virtual machine instances; Migration and load balancing
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Abstract
A virtual machine migration control method comprises the following steps: detecting the use conditions of a first physical machine bearing a virtual machine and a first I/O unit serving as a transmission interface of the virtual machine; judging whether the first physical machine is in an overload state according to the use condition of the first physical machine, and judging whether the first I/O unit is in the overload state according to the use condition of the first I/O unit; when the first physical machine is judged to be in an overload state, migrating the virtual machine from the first physical machine to a second physical machine; and when the first I/O unit is judged to be in an overload state, the transmission interface of the virtual machine is migrated from the first I/O unit to a second I/O unit. The invention also provides a virtual machine migration control device. The invention can flexibly and intelligently migrate the virtual machine and/or the transmission interface of the virtual machine, thereby reducing the resource waste in the virtual machine migration process.
Description
Technical Field
The present invention relates to data processing technologies, and in particular, to a method and an apparatus for controlling virtual machine migration.
Background
Virtualization technology has been widely applied to computer systems, and the virtualization technology can virtualize physical resources of one physical machine into multiple virtual machines, and each virtual machine shares physical resources of a CPU (Central Processing Unit), a memory, a storage, and a network of the physical machine. In order to effectively utilize physical resources on each physical machine and ensure good operation of the virtual machine, a virtual machine migration method is currently used to achieve load balancing of each physical machine. For example, when a physical machine carrying a virtual machine fails or is overloaded, the virtual machine is migrated to the appropriate physical machine. Although the migration method can solve the overload problem of the physical machine bearing the virtual machine, the data size of the virtual machine migration across the physical machines required for synchronization and migration is huge, so that certain resource waste is inevitably caused.
Disclosure of Invention
In view of the foregoing, there is a need to provide a virtual machine migration control method, which can flexibly and intelligently migrate a virtual machine and/or a transmission interface of the virtual machine, so as to reduce resource waste during the virtual machine migration process.
In view of the foregoing, it is further necessary to provide a virtual machine migration control apparatus, which is used to flexibly and intelligently migrate a virtual machine and/or a transmission interface of the virtual machine, so as to reduce resource waste during the virtual machine migration process.
The virtual machine migration control method comprises the following steps: detecting the use conditions of a first physical machine bearing a virtual machine and a first I/O unit serving as a transmission interface of the virtual machine; judging whether the first physical machine is in an overload state according to the use condition of the first physical machine, and judging whether the first I/O unit is in the overload state according to the use condition of the first I/O unit; performing corresponding migration according to the judgment result, specifically comprising: when the first physical machine is judged to be in an overload state, migrating the virtual machine from the first physical machine to a second physical machine; and when the first I/O unit is judged to be in an overload state, the transmission interface of the virtual machine is migrated from the first I/O unit to a second I/O unit.
The virtual machine migration control device includes: a processor; and a storage device for storing at least one application; wherein the application program comprises a set of instructions and is executed by the processor, and wherein executing comprises: detecting the use condition of a first physical machine bearing a virtual machine and the use condition of a first I/O unit serving as a transmission interface of the virtual machine; judging whether the first physical machine is in an overload state according to the use condition of the first physical machine, and judging whether the first I/O unit is in the overload state according to the use condition of the first I/O unit; performing corresponding migration according to the judgment result, specifically comprising: migrating the virtual machine from the first physical machine to a second physical machine when the first physical machine is in an overloaded state; migrating a transport interface of the virtual machine from the first I/O unit to a second I/O unit when the first I/O unit is in an overload state.
Compared with the prior art, the virtual machine migration control method and device respectively judge whether the physical machine bearing the virtual machine and the I/O unit serving as the transmission interface of the virtual machine are in an overload state, and accordingly migrate the physical machine and/or the I/O unit instead of migrating the physical machine and the I/O unit under the condition that overload occurs each time. Therefore, the virtual machine migration control method and device can flexibly and intelligently migrate the virtual machine and/or the transmission interface of the virtual machine when the physical machine and/or the I/O unit are overloaded, and reduce resource waste in the migration process.
Drawings
FIG. 1 is a block diagram of a virtual machine migration system according to a preferred embodiment of the present invention.
FIG. 2 is a diagram illustrating virtual machine migration in the case of an overload physical machine according to a preferred embodiment of the present invention.
FIG. 3 is a diagram illustrating virtual machine migration in the event of an I/O unit overload condition according to a preferred embodiment of the present invention.
FIG. 4 is a diagram illustrating virtual machine migration in the case of overload of both physical machines and I/O units according to the preferred embodiment of the present invention.
FIG. 5 is a flowchart illustrating a virtual machine migration control method according to a preferred embodiment of the present invention.
Description of the main elements
| Virtual machine migration system | 1 |
| |
100 |
| First |
101 |
| Second |
103 |
| Shared I/ |
110 |
| First I/ |
105 |
| Second I/ |
107 |
| |
70 |
| Virtual machine |
80 |
| |
20 |
| Processor with a memory having a plurality of |
30 |
| Detecting |
40 |
| |
50 |
| |
60 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Fig. 1 is a diagram showing an architecture of a virtual machine migration system 1 according to a preferred embodiment of the present invention. The virtual machine migration system 1 is mainly composed of a virtual machine migration control device 80, a common I/O device 110 including a plurality of I/O (Input/Output) units, and a physical machine cluster 100 including a plurality of physical machines. The common I/O device 110 serves as a common input/output and is connected to each physical machine. The plurality of physical machines are configured to carry out operations of a virtual machine 70 (not shown in fig. 1), and the plurality of I/O units are configured to serve as transport interfaces of the virtual machine 70. The virtual machine migration control device 80 may be an external device attached to the physical machine or the I/O device, or may be a separate electronic device for controlling and managing the establishment, revocation and migration of the virtual machine 70. The virtual machine migration control device 80 is connected to the physical machine cluster 100 and the common I/O device 110. In this embodiment, the common I/O device 110 includes a first I/O unit 105 and a second I/O unit 107, and the physical machine cluster 100 includes a first physical machine 101 and a second physical machine 103.
The virtual machine migration control device 80 mainly includes a detection module 40, a determination module 50, a migration module 60, a memory 20 and a processor 30. The detecting module 40 is configured to detect a current physical machine carrying the virtual machine 70 and a current I/O unit serving as a transmission interface of the virtual machine. The current physical machine and the current I/O unit in this embodiment are the first physical machine 101 and the first I/O unit 105. The determining module 50 is configured to determine whether the first physical machine 101 and the first I/O unit 105 are in an overload state according to the usage. The migration module 60 is configured to determine whether to migrate the virtual machine 70 from the first physical machine 101 and/or the first I/O unit 105 to another suitable physical machine and/or another suitable I/O unit according to a determination result of the determining module 50, where the other suitable physical machine and the other suitable I/O unit are the second physical machine 103 and the second I/O unit 107 in this embodiment.
The modules are configured to be executed by one or more processors (processor 30 in this embodiment) to implement the invention. The modules referred to in the present invention are computer program segments that perform a specific function. The memory 20 is used for storing data such as program codes of the virtual machine migration control device 80.
The detecting module 40 is configured to detect a usage situation of a first physical machine 101 bearing the virtual machine 70 and a first I/O unit 105 serving as a transmission interface of the virtual machine. The usage of the first physical machine 101 is mainly the CPU usage of the first physical machine 101 and the usage of the storage unit. The first I/O unit 105 is used primarily for bandwidth utilization.
The determining module 50 is configured to compare the CPU utilization and the storage unit utilization of the first physical machine 101 detected by the detecting module 40 with a preset first threshold respectively, so as to determine whether the first physical machine 101 is in an overload state. When the CPU utilization or the storage unit utilization of the first physical machine 101 is greater than the first threshold, the determining module 50 determines that the first physical machine 101 is in an overload state. In this embodiment, the first threshold is preset to 90%, and when the cpu usage rate or the storage unit usage rate of the first physical machine 101 is greater than 90%, the first physical machine 101 is considered to be in an overload state. In other embodiments, different thresholds may be set for the cpu usage and the memory cell usage, respectively.
When neither the CPU utilization rate nor the storage unit utilization rate of the first physical machine 101 is greater than the first threshold, the determining module 50 determines that the first physical machine 101 is not in an overload state, and further compares the transmission bandwidth utilization rate of the first I/O unit 105 detected by the detecting module 40 with a preset second threshold to determine whether the first I/O unit 105 is in the overload state. When the transmission bandwidth utilization of the first I/O unit 105 is greater than the second threshold, the determining module 50 determines that the first I/O unit 105 is in an overload state. In this embodiment, the second threshold is preset to 95%, and when the transmission bandwidth utilization rate of the first I/O unit 105 is greater than 95%, the first I/O unit 105 is considered to be in an overload state.
In other embodiments, the usage of the first I/O unit 105 may also be a transmission speed, and the transmission speed of the first I/O unit 105 is used as a basis for determining whether the first I/O unit 105 is in a load state. And a transmission speed limit value, for example 100Mbit/S, is set as the second threshold value. At this time, the judging module 50 judges whether the transmission speed of the first I/O unit 105 is greater than 100Mbit/S, and when the transmission speed of the first I/O unit 105 is greater than 100Mbit/S, the first I/O unit 105 is considered to be in an overload state.
The migration module 60 is configured to determine whether to migrate the virtual machine 70 from the first physical machine 101 to the second physical machine 103 and/or to migrate the transmission interface of the virtual machine 70 from the first I/O unit 105 to the second I/O unit 107 according to the determination result of the determining module 50. Specifically, when the determining module 50 determines that the first physical machine 101 is in an overload state and the first I/O unit 105 is not in the overload state, the migrating module 60 migrates the virtual machine 70 from the first physical machine 101 to the second physical machine 103 (see fig. 2). When the determining module 50 determines that the first physical machine 101 is not in the overload state and the first I/O unit 105 is in the overload state, the migrating module 60 migrates the transmission interface of the virtual machine 70 from the first I/O unit 105 to the second I/O unit 107 (see fig. 3). When the migration module 60 determines that the first physical machine 101 and the first I/O unit 105 are both in the overload state by the determination module 50, the virtual machine 70 is migrated from the first physical machine 101 to the second physical machine 103, and the transmission interface of the virtual machine 70 is migrated from the first I/O unit 105 to the second I/O unit 107 (see fig. 4).
Fig. 5 is a flowchart illustrating a virtual machine migration control method according to a preferred embodiment of the invention. The virtual machine migration method is applied to a virtual machine migration system which is composed of a physical machine cluster at least comprising a first physical machine and a second physical machine and a shared I/O device at least comprising a first I/O unit and a second I/O unit, and is realized by executing program codes stored in a memory through a processor.
Step S12: detecting the use condition of a first physical machine bearing a virtual machine and a first I/O unit serving as a transmission interface of the virtual machine. The detecting of the use condition of the first physical machine mainly comprises detecting the CPU use rate and the storage unit use rate of the first physical machine. The usage of the first I/O unit is detected, in this embodiment, the transmission bandwidth usage of the first I/O unit is detected, and in other embodiments, the transmission speed of the first I/O unit may also be detected.
Step S14: judging whether the first physical machine is in an overload state according to the detected service condition of the first physical machine, and executing step S16 when the first physical machine is in the overload state; otherwise, it jumps to step S18. Specifically, whether the first physical machine is in an overload state is judged by comparing the detected CPU utilization rate and storage unit utilization rate of the first physical machine with a preset first threshold value. And when the CPU utilization rate or the storage unit utilization rate of the first physical machine is greater than the first threshold value, judging that the first physical machine is in an overload state. In this embodiment, the first threshold is preset to 90%, and when the cpu usage rate or the storage unit usage rate of the first physical machine is greater than 90%, the first physical machine is considered to be in an overload state. In other embodiments, different thresholds may be set for the cpu usage and the memory cell usage, respectively.
Step S16: migrating the virtual machine from the first physical machine to the second physical machine.
Step S18: judging whether the first I/O unit is in an overload state according to the detected using condition of the first I/O unit, and executing step S20 when the first I/O unit is in the overload state; otherwise, the flow ends. Specifically, whether the first I/O unit is in an overload state is determined by comparing the detected transmission bandwidth utilization of the first I/O unit with a preset second threshold. And when the transmission bandwidth utilization rate of the first I/O unit is greater than the second threshold value, judging that the first I/O unit is in an overload state. In this embodiment, the second threshold is preset to 95%, and when the transmission bandwidth utilization rate of the first I/O unit is greater than 95%, the first I/O unit is considered to be in an overload state.
When the usage of the first I/O unit is transmission speed, a transmission speed limit value, e.g. 100Mbit/S, is set as the second threshold. At this time, it is determined whether the transmission speed of the first I/O unit is greater than 100Mbit/S, and when the transmission speed of the first I/O unit is greater than 100Mbit/S, the first I/O unit is considered to be in an overload state.
Step S20: migrating a transport interface of the virtual machine from the first I/O unit to the second I/O unit.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. A virtual machine migration control apparatus, comprising:
a processor; and
a storage device for storing at least one application; wherein
The application program comprises an instruction set and is executed by the processor, and the execution comprises the following steps:
detecting the use condition of a first physical machine bearing a virtual machine and the use condition of a first I/O unit in a shared I/O device serving as a transmission interface of the virtual machine, wherein the shared I/O device comprises the first I/O unit and a second I/O unit;
judging whether the first physical machine is in an overload state or not according to the using condition of the first physical machine, and judging whether the first I/O unit is in the overload state or not according to the using condition of the first I/O unit;
performing corresponding migration according to the judgment result, specifically comprising:
migrating the virtual machine from the first physical machine to a second physical machine when the first physical machine is in an overloaded state;
migrating a transport interface of the virtual machine from the first I/O unit to the second I/O unit when the first I/O unit is in an overloaded state.
2. The virtual machine migration control apparatus according to claim 1, wherein the usage of the first physical machine includes a usage of a CPU and a usage of a storage unit.
3. The virtual machine migration control apparatus according to claim 2, wherein said application program contains an instruction set for further performing the steps of:
and when the utilization rate of the CPU or the utilization rate of the storage unit of the first physical machine is greater than a preset first threshold value, judging that the first physical machine is in an overload state.
4. The virtual machine migration control apparatus according to claim 1, wherein the usage of the first I/O unit includes a transmission bandwidth usage rate and a transmission speed.
5. The virtual machine migration control apparatus according to claim 4, wherein said application program contains an instruction set further executing the steps of:
and when the transmission bandwidth utilization rate or the transmission speed of the first I/O unit is greater than a preset second threshold value, judging that the first I/O unit is in an overload state.
6. A virtual machine migration control method is characterized by comprising the following steps:
detecting the use condition of a first physical machine bearing a virtual machine and a first I/O unit in a shared I/O device serving as a transmission interface of the virtual machine, wherein the shared I/O device comprises the first I/O unit and a second I/O unit;
judging whether the first physical machine is in an overload state or not according to the using condition of the first physical machine, and judging whether the first I/O unit is in the overload state or not according to the using condition of the first I/O unit;
performing corresponding migration according to the judgment result, specifically comprising:
when the first physical machine is judged to be in an overload state, migrating the virtual machine from the first physical machine to a second physical machine;
and when the first I/O unit is judged to be in an overload state, the transmission interface of the virtual machine is migrated from the first I/O unit to the second I/O unit.
7. The virtual machine migration control method according to claim 6, wherein the usage of the first physical machine includes usage of a CPU and a storage unit.
8. The method for controlling virtual machine migration according to claim 7, wherein the determining whether the first physical machine is overloaded according to the usage includes:
and when the utilization rate of the CPU or the storage unit of the first physical machine is greater than a preset first threshold value, judging that the first physical machine is in an overload state.
9. The virtual machine migration control method according to claim 6, wherein the usage of the first I/O unit includes a transmission bandwidth usage rate and a transmission speed.
10. The virtual machine migration control method according to claim 9, wherein said determining whether the first I/O unit is overloaded according to the usage condition specifically includes:
and when the utilization rate of the first I/O unit is greater than a preset second threshold value, judging that the first I/O unit is in an overload state.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7814495B1 (en) * | 2006-03-31 | 2010-10-12 | V Mware, Inc. | On-line replacement and changing of virtualization software |
| CN104050117A (en) * | 2013-03-15 | 2014-09-17 | 谷歌公司 | Efficient input/output (i/o) operations |
| EP2835953A1 (en) * | 2012-08-29 | 2015-02-11 | Huawei Technologies Co., Ltd | System and method for live migration of virtual machine |
| CN104636181A (en) * | 2013-11-08 | 2015-05-20 | 国际商业机器公司 | Method and system for migrating virtual machine |
| CN104793985A (en) * | 2015-04-24 | 2015-07-22 | 中国联合网络通信集团有限公司 | Virtual machine scheduling method and management equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096601A (en) * | 2011-02-11 | 2011-06-15 | 浪潮(北京)电子信息产业有限公司 | Virtual machine migration management method and system |
| CN102236582B (en) * | 2011-07-15 | 2013-06-05 | 浙江大学 | Method for balanced distribution of virtualized cluster load in a plurality of physical machines |
| CN102724277B (en) * | 2012-05-04 | 2016-01-06 | 华为技术有限公司 | The method of live migration of virtual machine and deployment, server and group system |
| CN105159751B (en) * | 2015-09-17 | 2018-11-09 | 河海大学常州校区 | The virtual machine migration method of energy efficient in a kind of cloud data center |
| CN105607943A (en) * | 2015-12-18 | 2016-05-25 | 浪潮集团有限公司 | Dynamic deployment mechanism of virtual machine in cloud environment |
-
2017
- 2017-03-31 CN CN201710206673.6A patent/CN108664311B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7814495B1 (en) * | 2006-03-31 | 2010-10-12 | V Mware, Inc. | On-line replacement and changing of virtualization software |
| EP2835953A1 (en) * | 2012-08-29 | 2015-02-11 | Huawei Technologies Co., Ltd | System and method for live migration of virtual machine |
| CN104050117A (en) * | 2013-03-15 | 2014-09-17 | 谷歌公司 | Efficient input/output (i/o) operations |
| CN104636181A (en) * | 2013-11-08 | 2015-05-20 | 国际商业机器公司 | Method and system for migrating virtual machine |
| CN104793985A (en) * | 2015-04-24 | 2015-07-22 | 中国联合网络通信集团有限公司 | Virtual machine scheduling method and management equipment |
Non-Patent Citations (2)
| Title |
|---|
| Virtual Machine Migration Strategy in Cloud Computing;S. Liyanage等;《2015 14th International Symposium on Distributed Computing and Applications for Business Engineering and Science (DCABES)》;20160310;147-150 * |
| 分布式系统下的启发式任务调度算法;贾丽云 等;《计算机工程与应用》;20171231;63-69 * |
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