CN107544841B - Virtual machine live migration method and system - Google Patents
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Abstract
The invention discloses a method and a system for live migration of a virtual machine, wherein the method comprises the following steps: a source virtual machine on a source server generates a first network card through bridging, and the first network card is bound with a second network card virtualized by adopting a single input/output virtualization (SR-IOV) technology; the source server establishes connection with the target server through the first network card; the source server sends the virtual machine memory data to the target server through the first network card, so that the target virtual machine is generated on the target server according to the virtual machine memory data, and therefore the thermal migration between the source server and the target server is completed. The invention has the following advantages: the network card generated by bridging is used for data interaction in the virtual machine live migration process, so that the virtual machine live migration can be stably realized, a user cannot feel the interruption of the virtual machine service, and the migration range is expanded to the whole network.
Description
Technical Field
The invention relates to the technical field of network server equipment virtualization, in particular to a method and a system for virtual machine live migration.
Background
Migration in virtualized environments is divided into static migration and live migration. The virtual machine is subjected to live migration, namely dynamic migration and real-time migration. Static migration has the greatest disadvantage over dynamic migration in that services in the client are not available for a significant period of time during the migration process, and therefore has many limitations in networks with large access and high real-time requirements. The dynamic migration has important roles in load balancing, hardware dependence removal, energy saving, realization of remote migration of the geographic position of the client and the like.
In a server virtualization environment, traffic is loaded on virtual machines, which run on servers. SR-IOV (Single-port I/O Virtualization) technology, which is an I/O Virtualization technology, by which many virtual PCIE devices having the same function can be virtualized on one physical PCIE (PCI-Express, peripheral Component Interconnect-Express) device. Each Virtual PCIE device has an independent memory space, a Function instance having the Virtual PCIE device is called a VF (Virtual Function), each VF serves one Virtual machine, and messages are directly exchanged between the Virtual machine and the VF without intervention of a host, so that the service efficiency is high.
In the server device adopting SR-IOV, since the VF cannot be migrated in different ethernet devices, the live migration of the virtual machine cannot be realized.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
Therefore, an object of the present invention is to provide a virtual machine live migration method, which enables a client to migrate between different hosts while ensuring that an application service on the client operates normally according to a requirement of a server device.
In order to achieve the above object, an embodiment of the present invention discloses a virtual machine live migration method, including the following steps: a source virtual machine on a source server generates a first network card through bridging, and the first network card is bound with a second network card which is virtualized by adopting a single input/output virtualization (SR-IOV) technology, wherein the source server is connected with a target server through the second network card; the source server establishes connection with the target server through the first network card; the source server sends virtual machine memory data to the target server through the first network card, so that a target virtual machine is generated on the target server according to the virtual machine memory data, and the thermal migration between the source server and the target server is completed, wherein in the process that the source server sends the virtual machine memory data to the target server through the first network card, links among the source server, the second network card and the target server are disconnected.
According to the virtual machine live migration method provided by the embodiment of the invention, the network card generated by bridging is used for data interaction in the virtual machine live migration process, so that the virtual machine live migration can be stably realized, a user can not feel the interruption of the virtual machine service, and the migration range is expanded to the whole network.
In addition, the virtual machine live migration method according to the above embodiment of the present invention may further have the following additional technical features:
further, after the source server sends the virtual machine memory data to the target server through the first network card, the method further includes: and deleting the source virtual machine.
Further, when the first network card and the second network card are bound, the method further comprises the following steps: setting an automatic standby mode on the source server, wherein the automatic standby mode is used for automatically switching to a link where the other network card is located when the link where the first network card or the second network card is located is disconnected; when the source server sends the virtual machine memory data to the target server through the first network card, the source server cuts off a link where the second network card is located according to the automatic backup mode, and simultaneously automatically switches the link where the first network card is located to carry out data interaction.
Further, a driver MacVTap is used to implement a hot migration between the source server and target server.
Further, when the first network card and the second network card are bound, the method further includes: and configuring an IP address and a physical address MAC (Medium Access Control) of the second network card.
The invention aims to provide a virtual machine live migration system, which ensures that an application service on a client normally runs according to the requirement of server equipment and enables the client to migrate among different hosts.
In order to achieve the above object, an embodiment of the present invention discloses a virtual machine live migration system, which includes a source server, where the source server includes: a source virtual machine; the first network card is generated through bridging; the second network card is generated virtually by adopting a single input/output virtualization (SR-IOV) technology; the binding module is used for binding the first network card with the second network card; before the source server and the target server perform the thermal migration, the source server is connected with the target server through the second network card; when the source server and the target server perform the thermal migration, the source server provides virtual machine memory data to the target server through the first network card, so that a target virtual machine is generated on the target server according to the virtual machine memory data, and the thermal migration between the source server and the target server is completed.
According to the virtual machine live migration system disclosed by the embodiment of the invention, the network card generated by the bridging technology is used for data interaction in the virtual machine live migration process, so that the virtual machine live migration can be stably realized, a user can not feel the interruption of the virtual machine service, and the migration range is expanded into the whole network.
In addition, the virtual machine live migration system according to the above embodiment of the present invention may further have the following additional technical features:
further, the source server is further configured to delete the source virtual machine after the sending of the virtual machine memory data to the target server is completed.
Further, the source server is further configured to set an auto-backup mode, where the auto-backup mode is used to automatically switch to a link where another network card is located when a link where the first network card or the second network card is located is disconnected; and the source server is also used for cutting off the link of the second network card after receiving a cutting-off instruction sent by the external equipment, and automatically switching the link of the first network card for data interaction when the link of the second network card is cut off according to the automatic backup mode.
Further, a driver MacVTap is used to implement a hot migration between the source server and target server.
Further, the source server is further configured to configure an IP address and a physical address MAC of the second network card when the first network card and the second network card are bound.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a virtual machine live migration method according to an embodiment of the present invention;
FIG. 2 is a block diagram of a virtual machine live migration configuration according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a thermomigration process of one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
The virtual machine live migration method and the virtual machine live migration system according to the embodiments of the present invention are described below with reference to the drawings.
Fig. 1 is a flowchart of a virtual machine live migration method according to an embodiment of the present invention.
Referring to fig. 1, a virtual machine live migration method includes the following steps:
and generating a first network card by bridging a source virtual machine on a source server, and binding the first network card with a second network card virtualized by adopting an SR-IOV technology. And before the source server and the target server perform the thermal migration, the source server is connected with the target server through a second network card. Specifically, a source virtual machine on a source server is bridged to generate a first network card. And loading a binding module on the source server to bind the first network card and a second network card virtualized by adopting an SR-IOV technology, and configuring the binding module, wherein the configuration comprises IP (Internet protocol), MAC (media access control), appointed binding network cards and the like. And before the source server and the target server carry out the thermal migration, the source server is connected with the target server through a second network card. The binding module is selected to be in an automatic backup mode (equivalent to master-slave backup), namely when a link where a certain network card is located is disconnected, the link is automatically switched to another network card link.
And the source server establishes connection with the target server through the first network card.
The source server performs live migration on the memory data of the virtual machine to the target service through the first network card, so that a target virtual machine is generated on the target server according to the memory data of the virtual machine, and the live migration between the source server and the target server is completed. In a process that the source server sends the memory data of the virtual machine to the target server through the first network card (namely, a live migration process), links among the source server, the second network card and the target server are disconnected. Specifically, the link where the second network card is located is disconnected in the live migration process, and the link where the first network card is located is started. The transferred virtual machine configuration information is not an XML configuration file in the virtual machine directory, but is merely information in the registry. The process of virtual machine memory data transmission is as follows: and locking the memory of the virtual machine in the source host, and transmitting the partial information to the target host. The virtual machine continues to run at the host while a new memory region is opened up on the source host to serve the client, which only holds what the client has changed since this point. And transmitting the changed parts to the target host, establishing the target virtual machine in the target server according to the virtual machine memory data after the heat transmission of the virtual machine data transmission is completed (the hot migration is ensured) when the content change of the virtual machine related to the source server memory is within a minimum range or the memory data is not changed, and changing the MAC of the VF into the MAC of the source virtual machine of the source server.
In an embodiment of the present invention, after the source server sends the virtual machine memory data to the target server through the first network card, the method further includes: and deleting the source virtual machine to save server resources.
In an embodiment of the present invention, when the first network card and the second network card are bound, the method further includes the following steps: and setting an automatic backup mode on the source server, wherein the automatic backup mode is used for automatically switching to a link where the other network card is located when the link where the first network card or the second network card is located is disconnected. When the source server sends the virtual machine memory data to the target server through the first network card, the source server cuts off the link where the second network card is located according to the automatic backup mode, and simultaneously automatically switches the link where the first network card is located to carry out data interaction.
In one embodiment of the invention, a driver MacVTap is used to implement the hot migration between the source and target servers. MacVTap is a new device driver aimed at simplifying virtualized bridged networks. A MacVTap endpoint (endpoint) is a character device. And creating the MacVTap and modifying the MAC of the MacVTap into the MAC after source binding.
In an embodiment of the present invention, when the first network card and the second network card are bound, the method further includes: and configuring the IP address and the physical address MAC of the second network card.
By the virtual machine live migration method, the bridged generated network card is used for data interaction in the virtual machine live migration process, so that the virtual machine live migration can be stably realized, a user can not feel the interruption of the virtual machine service, and the migration range is expanded to the whole network.
The embodiment of the invention also discloses a virtual machine live migration system.
Fig. 2 is a block diagram of a virtual machine live migration system according to an embodiment of the present invention.
Referring to fig. 2, a virtual machine live migration system 200 includes an origin server 210. The source server 210 includes a source virtual machine 211, a first network card 212, a second network card 213, and a binding module 214.
The source virtual machine 211 is disposed in the source server 210, and is used for providing a virtual service. . The second network card 213 is virtually generated using the SR-IOV technique. The binding module 214 binds the first network card 212 with the second network card 213. Before the source server 210 and the target server perform the live migration, the source server 210 is connected to the target server through the second network card 213. When the source server 210 and the target server perform the live migration, the source server 210 sends the virtual machine memory data to the target server through the first network card 212, so that the target server generates the target virtual machine according to the virtual machine memory data, thereby completing the live migration between the source server 210 and the target server.
In an embodiment of the present invention, the source server 210 is further configured to delete the source virtual machine 211 after the virtual machine memory data is completely sent to the target server.
In an embodiment of the present invention, the source server 210 is further configured to set an automatic backup mode, where the automatic backup mode is used to automatically switch to a link where another network card is located when the link where the first network card 212 or the second network card 213 is located is disconnected. The source server 210 is further configured to cut off the link where the second network card 213 is located after receiving a cut-off instruction sent by the external device, and automatically switch the link where the first network card is located to perform data interaction when the link where the second network card is located is disconnected according to the automatic backup mode.
In one embodiment of the invention, a driver MacVTap is used to implement the live migration between the source server and the target server.
In one embodiment of the invention, origin server 210 is further configured to configure the IP address and MAC address of second network card 212 when first network card 212 and second network card 212 are bound.
It should be noted that a specific implementation manner of the virtual machine live migration system in the embodiment of the present invention is similar to a specific implementation manner of the virtual machine live migration method in the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not described here in order to reduce redundancy.
In order that those skilled in the art will further understand the present invention, the following examples are given for the purpose of illustration.
FIG. 3 is a schematic illustration of a thermomigration process of one embodiment of the invention. Referring to FIG. 3, the source server live migration architecture is similar to the target server. Many PFs (Physical functions) are virtualized into many VFs using SR-IOV technology. Each VF corresponds to a VM (Virtual Machine). Assume that the virtual machine to be live migrated is VM1. Firstly, a plurality of VF virtual network cards are virtualized on a source host and a target host by an SR-IOV technology and are provided for a virtual machine (such as VF 1). Before the live migration starts, the service is provided to the application of the virtual machine through the link 2, and the business data flow does not pass through the PF of the host machine but directly passes through a network interface adapter (NIC) to receive and send a receipt through a Physical Port. However, when the thermal migration is performed, VF1 cannot be migrated. At this time, through a bridging technology, a bridging relationship is established between the network card of the VM1 and the physical network card of the source host, then the two network cards of the virtual machine are bound (binding), and at this time, the memory data of the live-migrated virtual machine VM1 can be forwarded to the target server through the link 1, the network bridge, the network port adapter, and the physical port via the switch, until the transfer of the live-migrated data of the virtual machine is completed.
In addition, other configurations and functions of the virtual machine live migration method and the virtual machine live migration system according to the embodiments of the present invention are known to those skilled in the art, and are not described in detail for reducing redundancy.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A virtual machine live migration method is characterized by comprising the following steps:
a source virtual machine on a source server generates a first network card through bridging, and the first network card is bound with a second network card which is virtualized by adopting a single input/output virtualization (SR-IOV) technology, wherein the source server is connected with a target server through the second network card;
the source server establishes connection with the target server through the first network card;
the source server sends virtual machine memory data to the target server through the first network card, so that a target virtual machine is generated on the target server according to the virtual machine memory data, and therefore the thermal migration between the source server and the target server is completed, wherein in the process that the source server sends the virtual machine memory data to the target server through the first network card, links among the source server, the second network card and the target server are disconnected.
2. The method of claim 1, further comprising, after the source server sends virtual machine memory data to the target server via the first network card:
and deleting the source virtual machine.
3. The method according to claim 1, further comprising the following steps in binding the first network card and the second network card:
setting an automatic backup mode on the source server, wherein the automatic backup mode is used for automatically switching to a link where another network card is located when the link where the first network card or the second network card is located is disconnected;
when the source server sends the virtual machine memory data to the target server through the first network card, the source server cuts off a link where the second network card is located according to the automatic backup mode, and simultaneously automatically switches the link where the first network card is located to carry out data interaction.
4. The method according to claim 1, wherein the hot migration between the source server and the target server is implemented using a driver MacVTap.
5. The method of claim 1, further comprising, when binding the first network card and the second network card:
and configuring the IP address and the physical address MAC of the second network card.
6. A virtual machine live migration system is characterized by comprising
An origin server, the origin server comprising:
a source virtual machine;
the first network card is generated by bridging;
the second network card is generated virtually by adopting a single input/output virtualization (SR-IOV) technology;
the binding module is used for binding the first network card with the second network card;
before the source server and the target server perform the thermal migration, the source server is connected with the target server through the second network card; when the source server and the target server perform the live migration, the source server sends the virtual machine memory data to the target server through the first network card, so that a target virtual machine is generated on the target server according to the virtual machine memory data, and the live migration between the source server and the target server is completed.
7. The system of claim 6, wherein the source server is further configured to delete the source virtual machine after the sending of the memory data of the virtual machine to the target server is completed.
8. The system of claim 6, wherein the source server is further configured to set an auto-backup mode, and the auto-backup mode is configured to automatically switch to a link where another network card is located when a link where the first network card or the second network card is located is disconnected; and the source server is also used for cutting off the link of the second network card after receiving a cutting-off instruction sent by the external equipment, and automatically switching the link of the first network card to perform data interaction when the link of the second network card is disconnected according to the automatic backup mode.
9. The system of claim 6, wherein the driver MacVTap is used to implement the hot migration between the source server and the target server.
10. The system of claim 6, wherein the origin server is further configured to configure an IP address and a physical address MAC of the second network card when the first network card and the second network card are bound.
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| CN109032754B (en) * | 2018-06-29 | 2022-04-05 | 华为云计算技术有限公司 | Method and apparatus for improving reliability of communication path |
| CN109739618B (en) * | 2018-12-10 | 2021-04-06 | 新华三云计算技术有限公司 | Virtual machine migration method and device |
| CN109597671B (en) * | 2018-12-11 | 2022-06-10 | 国云科技股份有限公司 | Desktop cloud implementation method compatible with centralized and distributed operation |
| CN109753346B (en) * | 2018-12-25 | 2021-01-01 | 新华三云计算技术有限公司 | Virtual machine live migration method and device |
| CN111258665A (en) * | 2020-01-21 | 2020-06-09 | 上海米哈游天命科技有限公司 | Server starting method, device, server and medium |
| CN111866209A (en) * | 2020-07-07 | 2020-10-30 | 上海云轴信息科技有限公司 | Method and equipment for distributing network card for cloud host |
| CN112968809B (en) * | 2021-02-02 | 2022-09-13 | 杭州安恒信息技术股份有限公司 | Method and device for testing system stability and compatibility |
| CN114679461B (en) * | 2022-03-30 | 2023-02-14 | 浙江大学 | Cloud network session connectivity guarantee method and system for virtual machine live migration scene |
| CN115499385B (en) * | 2022-09-21 | 2023-09-12 | 中电云数智科技有限公司 | Method for preventing packet loss during thermal migration of vDPA virtual machine |
| CN115499298B (en) * | 2022-11-15 | 2023-02-28 | 济南浪潮数据技术有限公司 | Virtual machine live migration method, device, equipment and medium |
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