CN104243265A - Gateway control method, device and system based on virtual machine migration - Google Patents

Abstract

The embodiment of the present invention discloses a gateway control method, device, and system based on virtual machine migration, which relate to the communication field and are used to solve the problem of occupying bandwidth for data transmission between devices when data transmission is performed after virtual machine migration, resulting in waste of bandwidth resources The problem. The specific solution is: the SDN controller obtains the IP address of the first virtual machine gateway, the MAC address of the first virtual machine gateway, and the VTEP IP address of the second physical server; the SDN controller controls the second physical server according to the VTEP IP address of the second physical server. The physical gateway configures the second virtual machine gateway on the second physical gateway for the virtual machine. The IP address of the second virtual machine gateway is the same as the IP address of the first virtual machine gateway, and the MAC address of the second virtual machine gateway is the same as that of the first virtual machine gateway. The MAC address of the physical gateway is the same; the first flow entry is created, so that the second physical gateway forwards data for the virtual machine according to the data forwarding policy indicated by the first flow entry.

Description

A gateway control method, device and system based on virtual machine migration

technical field

The present invention relates to the communication field, in particular to a virtual machine migration-based gateway control method, device and system.

Background technique

A virtual machine (Virtual Machine, VM) refers to a computer system that is simulated by software and has complete hardware system functions and runs on a physical server. A physical server can run multiple virtual machines at the same time, and each virtual machine uses a part of the physical resources of the physical server, such as CPU and memory.

A virtual machine can be migrated from one physical server to another, and run on the migrated physical server to achieve server load balancing, online maintenance, and fault handling. Wherein, the physical gateway of the physical server where the virtual machine resides before migration is different from the physical gateway of the physical server where the virtual machine resides after migration, and at least one virtual machine gateway of a virtual machine can be configured on a physical gateway.

Among them, when a virtual machine is migrated from one physical server (physical server A) to another physical server (physical server B), the physical location of the virtual machine has changed, but the virtual machine gateway of the virtual machine is still in the physical On the gateway, at this time, in order to ensure business continuity, when the virtual machine communicates with other virtual machines (the other virtual machines are virtual machines on a different network segment from the virtual machine), it is necessary to connect the physical server B and the physical The server A is connected, and then the data is forwarded through the virtual machine gateway (the original virtual machine gateway) of the virtual machine configured on the physical gateway of the physical server A.

However, there is a problem that when a virtual machine and a virtual machine gateway that is on a different physical server from the virtual machine transmit data, the data needs to be forwarded through several other devices (such as switches) between the physical servers, and the data between the devices Additional data forwarding will increase the data traffic for data transmission between devices, occupy the bandwidth for data transmission between devices, and cause a waste of bandwidth resources.

Contents of the invention

Embodiments of the present invention provide a gateway control method, device, and system based on virtual machine migration to solve the problem of occupying bandwidth for data transmission between devices during data transmission after virtual machine migration, resulting in waste of bandwidth resources.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

The first aspect of the embodiments of the present invention provides a gateway control method based on virtual machine migration. The first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server. When the virtual machine When migrating from the first physical server to the second physical server, the method includes:

The software-defined network SDN controller obtains the IP address of the Internet protocol of the first virtual machine gateway, the media access control MAC address of the first virtual machine gateway, and the virtual tunnel terminal node VTEP IP address of the second physical server, and the first The virtual machine gateway is a virtual machine gateway of the virtual machine configured on the first physical gateway;

The SDN controller controls the second physical gateway to configure a second virtual machine gateway for the virtual machine on the second physical gateway according to the VTEP IP address of the second physical server, and the second virtual machine The IP address of the gateway is the same as the IP address of the first virtual machine gateway, and the MAC address of the second virtual machine gateway is the same as the MAC address of the first virtual machine gateway;

The SDN controller creates a first flow entry, the first flow entry includes the VTEP IP address of the second physical gateway, the IP address of the second virtual machine gateway, and the MAC address of the second virtual machine gateway The mapping relationship between the address and the IP address of the virtual machine and the extended virtual local area network VxLAN ID of the virtual machine, and send the first flow entry to the second physical gateway, so that the second physical The gateway forwards data for the virtual machine according to the data forwarding policy indicated by the first flow entry, and the VxLAN ID of the virtual machine is used to identify the network segment where the virtual machine is located.

With reference to the first aspect, in a possible implementation manner, the SDN controller controls the second physical gateway to make the virtual machine on the second physical gateway according to the VTEP IP address of the second physical server. Configure the second virtual machine gateway on it, including:

The SDN controller determines the VTEP IP address of the second physical gateway according to the VTEP IP address of the second physical server;

The SDN controller controls the second physical gateway to configure the second virtual machine gateway on the second physical gateway for the virtual machine according to the VTEP IP address of the second physical gateway.

In combination with the first aspect and the above possible implementation, in another possible implementation, the SDN controller controls the second physical gateway to be the virtual machine according to the VTEP IP address of the second physical gateway. Configuring the second virtual machine gateway on the second physical gateway includes:

The SDN controller sends the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway to the second physical gateway according to the VTEP IP address of the second physical gateway, so that the The second physical gateway configures the second virtual machine gateway on the second physical gateway according to the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway.

In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the software-defined network SDN controller acquires the Internet Protocol IP address of the first virtual machine gateway, the media address of the first virtual machine gateway Access control MAC address and virtual tunnel terminal node VTEP IP address of the second physical server, including:

The SDN controller obtains virtual machine migration information, and the virtual machine migration information includes: the IP address of the virtual machine, the MAC address of the virtual machine, and the VTEP IP address of the second physical server;

The SDN controller determines the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway according to the IP address of the virtual machine and the MAC address of the virtual machine.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, after the SDN controller creates the first flow entry, the method further includes:

Delete the second flow entry, the second flow entry includes the VTEP IP address of the first physical gateway, the IP address of the first virtual machine gateway, the MAC address of the first virtual machine gateway, and the virtual machine The mapping relationship between the IP address and the extended virtual local area network VxLAN ID of the virtual machine.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, after the SDN controller obtains virtual machine migration information before the SDN controller creates the first flow entry, the method further include:

Determine the VxLAN ID of the virtual machine according to the IP address of the virtual machine and the MAC address of the virtual machine.

In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, after the first flow entry is created, the method further includes:

Judging whether there are other virtual machines using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine;

If there is no other virtual machine using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine, then controlling the first physical gateway to delete all the configurations configured on the first physical gateway Describe the first virtual machine gateway.

The second aspect of the embodiment of the present invention provides a software-defined network SDN controller, the first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server, which is applied to the virtual machine by During the process of migrating the first physical server to the second physical server, the SDN controller includes:

An acquisition unit configured to acquire the IP address of the Internet protocol of the first virtual machine gateway, the media access control MAC address of the first virtual machine gateway, and the virtual tunnel terminal node VTEP IP address of the second physical server, the first virtual machine The machine gateway is a virtual machine gateway of the virtual machine configured on the first physical gateway;

A configuration unit, configured to control the second physical gateway to configure a second virtual machine gateway on the second physical gateway for the virtual machine according to the VTEP IP address of the second physical server acquired by the acquisition unit, The IP address of the second virtual machine gateway is the same as the IP address of the first virtual machine gateway obtained by the obtaining unit, and the MAC address of the second virtual machine gateway is the same as that of the first virtual machine gateway obtained by the obtaining unit. The MAC addresses of the virtual machine gateways are the same;

A creation unit, configured to create a first flow entry, the first flow entry includes the VTEP IP address of the second physical gateway, the IP address of the second virtual machine gateway, and the MAC of the second virtual machine gateway The mapping relationship between the address and the IP address of the virtual machine and the extended virtual local area network VxLAN ID of the virtual machine;

a sending unit, configured to send the first flow entry created by the creation unit to the second physical gateway, so that the second physical gateway provides the virtual machine with a data forwarding policy according to the data forwarding policy indicated by the first flow entry Forwarding data, the VxLAN ID of the virtual machine is used to identify the network segment where the virtual machine is located.

With reference to the second aspect, in a possible implementation manner, the configuration unit includes:

The first determining subunit is used to determine the VTEP IP address of the second physical gateway according to the VTEP IP address of the second physical server;

The configuration subunit is configured to control the second physical gateway to configure the virtual machine on the second physical gateway according to the VTEP IP address of the second physical gateway determined by the first determination subunit. Second virtual machine gateway.

In combination with the second aspect and the above possible implementation, in another possible implementation, the configuration unit is specifically configured to send the VTEP IP address of the first virtual machine gateway according to the VTEP IP address of the second physical gateway. The IP address and the MAC address of the first virtual machine gateway to the second physical gateway, so that the second physical gateway according to the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway The address configures the second virtual machine gateway on the second physical gateway.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the acquiring unit includes:

An acquisition subunit, configured to acquire virtual machine migration information, where the virtual machine migration information includes: the IP address of the virtual machine, the MAC address of the virtual machine, and the VTEP IP address of the second physical server;

A second determining subunit, configured to determine the IP address of the first virtual machine gateway and the first virtual machine gateway according to the IP address of the virtual machine and the MAC address of the virtual machine obtained by the obtaining subunit MAC address.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the SDN controller further includes:

A deletion unit, configured to delete a second flow entry after the creation unit creates the first flow entry, the second flow entry includes the VTEP IP address of the first physical gateway, the first virtual machine The IP address of the gateway, the mapping relationship between the MAC address of the gateway of the first virtual machine and the IP address of the virtual machine, and the extended virtual local area network VxLANID of the virtual machine.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the SDN controller further includes:

A determining unit, configured to determine the flow entry according to the IP address of the virtual machine and the MAC address of the virtual machine after the acquiring unit acquires the virtual machine migration information before the creating unit creates the first flow entry. VxLAN ID of the above-mentioned virtual machine.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the SDN controller further includes:

A judging unit, configured to judge whether there are other virtual machines using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine after the creating unit creates the first flow entry;

The deleting unit is further configured to control the first virtual machine gateway if the judging unit judges that there is no other virtual machine using the first virtual machine gateway in the network segment identified by the VxLANID of the virtual machine. The physical gateway deletes the first virtual machine gateway configured on the first physical gateway.

The third aspect of the embodiment of the present invention provides a gateway control system based on virtual machine migration. The first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server. In the process of migrating the machine from the first physical server to the second physical server, the system includes: a software-defined network SDN controller, the virtual machine, the first physical server, and the first physical gateway , the first virtual machine gateway, the second physical server, the second physical gateway, and the second virtual machine gateway;

The first virtual machine gateway is the virtual machine gateway of the virtual machine configured on the first physical gateway; the second virtual machine gateway is the virtual machine gateway configured on the second physical gateway virtual machine gateway;

The SDN controller is configured to execute the gateway control method based on virtual machine migration according to any one of claims 1-7;

The second physical gateway is configured to configure the second virtual machine gateway on the second physical gateway according to the control of the SDN controller;

Wherein, the Internet Protocol IP address of the second virtual machine gateway is the same as the IP address of the first virtual machine gateway, and the MAC address of the second virtual machine gateway is the same as the media access address of the first virtual machine gateway. The control MAC address is the same.

In the gateway control method, device and system based on virtual machine migration provided by the embodiments of the present invention, the physical gateway (second physical gateway) of the physical server (second physical server) after virtual machine migration is configured with the same The virtual machine gateway (first virtual machine gateway) of the virtual machine configured on the physical gateway (first physical gateway) of the physical server (first physical server) has the same IP address and MAC address as the virtual machine gateway (second virtual machine gateway) machine gateway), to ensure that the virtual machine gateway address (the IP address of the virtual machine gateway and the MAC address of the virtual machine gateway) remains unchanged before and after the virtual machine migration; moreover, the mapping relationship between the physical gateway, the virtual machine gateway and the virtual machine can be sent to record The flow entry to the second physical gateway, so that when the virtual machine performs data transmission, it can directly pass through the virtual machine configured on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine migration The gateway (the second virtual machine gateway, that is, the virtual machine gateway with the same IP address and MAC address as the virtual machine gateway before the virtual machine migration) performs data forwarding without detouring to the physical server where the virtual machine was located before the migration (No. The virtual machine gateway (first virtual machine gateway) configured on the physical gateway (first physical gateway) of a physical server) performs data forwarding, which can reduce the data traffic for data transmission between devices, thereby reducing the data transmission between devices The occupied bandwidth can reduce the waste of bandwidth resources to a certain extent.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings.

FIG. 1 is a flowchart of a gateway control method based on virtual machine migration in an embodiment;

FIG. 2 is a flowchart of another gateway control method based on virtual machine migration in an embodiment;

FIG. 3 is a communication interaction diagram between a virtual machine 1 and a virtual machine 2 in an embodiment;

Fig. 4 is a schematic diagram of the format of a VxLAN message in an embodiment;

FIG. 5 is a schematic diagram of the composition of an SDN controller in an embodiment;

FIG. 6 is a schematic diagram of the composition of another SDN controller in the embodiment;

FIG. 7 is a schematic diagram of the composition of another SDN controller in the embodiment;

FIG. 8 is a schematic diagram of the composition of another SDN controller in the embodiment;

FIG. 9 is a schematic diagram of the composition of another SDN controller in the embodiment;

FIG. 10 is a schematic diagram of the composition of another SDN controller in the embodiment;

FIG. 11 is a schematic diagram of the composition of another SDN controller in the embodiment;

Fig. 12 is a schematic composition diagram of a gateway control system based on virtual machine migration in an embodiment.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art according to the embodiments of the present invention belong to the protection scope of the present invention.

Additionally, the terms "system" and "network" are often used herein interchangeably. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In order to facilitate the understanding of the embodiments of the present invention, several terms that will be introduced in the description of the embodiments of the present invention are firstly introduced here.

Data center: It is a data integration system, usually composed of components such as computing systems, storage systems, communication systems, network equipment, environmental control systems, and security systems, which are often used for data computing and storage.

Cloud management platform: It can be a collection of multiple management software, or it can be a software that realizes the required management functions. The cloud management platform can realize centralized management of large-scale data centers with low operating costs.

Physical server: refers to a computer used to manage resources and provide services to users. Compared with ordinary computers, physical servers have higher requirements in terms of stability and security.

Virtual machine (Virtual Machine, VM): refers to a computer system that is simulated by software and has complete hardware system functions and runs on a physical server. A physical server can run multiple virtual machines at the same time, and each virtual machine uses a part of the physical resources of the physical server, such as CPU and memory. It is also possible to run multiple different types of applications on different virtual machines and integrate them into one physical server, which can improve resource utilization and increase the computing power of the data center.

Extended Virtual Local Area Network (Virtual Extensible LAN, VxLAN): It is a technology that encapsulates Layer 2 (data link layer) packets with Layer 3 (network layer) protocols, and can extend the Layer 2 network in the Layer 3 range . It is applied inside the data center, so that the virtual machine can be migrated within the interconnected three-layer network without changing the Internet Protocol (Internet Protocol, IP) address and Media Access Control (Media Access Control, MAC) address, ensuring business continuity.

VxLAN ID (Virtual Extensible LAN ID): The identifier of the VxLAN network segment. The VxLAN IDs of the virtual machines in the same network segment are the same.

Virtual tunnel endpoint (Virtual tunnel endpoint, VTEP): used to encapsulate/decapsulate VxLAN packets (including address resolution protocol (Address Resolution Protocol, ARP) request packets and normal VxLAN data packets), at one end VTEP After the packet is encapsulated, the encapsulated packet is sent to the VTEP at the other end through the tunnel. After receiving the encapsulated packet, the VTEP at the other end decapsulates the packet and forwards it according to the encapsulated MAC address. VTEP can be implemented by hardware devices or software that support VxLAN.

Address Resolution Protocol ARP: It is a Transmission Control Protocol/Internet Protocol (Transmission Control Protocol/Internet Protocol, TCP/IP) that obtains a MAC address based on an IP address. Its function is: the local physical server broadcasts an ARP request to all physical servers on the network, and receives a return message from a certain physical server on the network, determines the MAC address of the target physical server according to the IP address of the target physical server, and sends the target physical server The IP address and MAC address of the server are stored in the ARP cache of the local physical server.

Physical gateway (Gateway, GW): responsible for data forwarding between different VxLANs, and encapsulating and decapsulating VxLAN packets according to the flow table.

Virtual machine gateway: configured on the physical gateway for data forwarding of virtual machines. Multiple virtual machine gateways can be configured on one physical gateway.

Virtual switch (Virtual switch, Vswtich): Like a physical switch, it contains a certain number of ports and can provide data exchange between devices connected to different ports.

Software Defined Network controller (SDN controller): Software programming for the network can control the data forwarding of VTEP and VxLAN gateway by creating a flow table.

In the VxLAN network, when a virtual machine is migrated from one physical server to another, the cloud management platform will notify the SDN controller of the migration information of the virtual machine, and the SDN controller will control the data forwarding direction of the virtual machine. The embodiment of the present invention is described by taking virtual machine migration in a VxLAN network as an example.

Example 1

An embodiment of the present invention provides a gateway control method based on virtual machine migration. The first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server. As shown in FIG. 1 , when the virtual When the machine is migrated from the first physical server to the second physical server, the method includes:

S101. The SDN controller acquires the IP address of the first virtual machine gateway, the MAC address of the first virtual machine gateway, and the VTEP IP address of the second physical server.

Wherein, the first virtual machine gateway is a virtual machine gateway of a virtual machine configured on the first physical gateway. The first physical server is the physical server where the virtual machine is located before migration, and the second physical server is the physical server where the virtual machine is located after migration. Multiple virtual machines can be configured on one physical server, and each virtual machine can use part of the physical resources of the physical server, such as CPU and memory.

The first virtual machine gateway in the embodiment of the present invention is the virtual machine used for data forwarding of the virtual machine virtualized on the physical gateway (first physical gateway) of the physical server (first physical server) where the virtual machine is located before migration Virtual machine gateway. Multiple virtual machine gateways can be configured on one physical gateway.

Optionally, in this embodiment of the present invention, the mapping relationship between the virtual machine and the virtual machine gateway may be pre-established and stored in the SDN controller. Of course, the SDN controller may also establish a mapping relationship between the virtual machine and the virtual machine gateway when the virtual machine needs to forward data through the virtual machine gateway, which is not limited in the embodiment of the present invention.

Wherein, the SDN controller can search for the IP address of the first virtual machine gateway and the first virtual MAC address of the machine gateway.

Optionally, the SDN controller can obtain the VTEP IP address of the second physical server according to the virtual machine migration information reported by the cloud management platform. Certainly, the SDN controller may also obtain the virtual machine migration information by sending a request to the cloud management platform, which is not limited in this embodiment of the present invention. Wherein, the virtual machine migration information includes the IP address of the virtual machine, the MAC address of the virtual machine and the VTEP IP address of the second physical server.

S102. The SDN controller controls the second physical gateway to configure the second virtual machine gateway on the second physical gateway for the virtual machine according to the VTEP IP address of the second physical server.

Wherein, the second virtual machine gateway is the virtual machine gateway of the virtual machine virtualized on the physical gateway (second physical gateway) of the physical server (second physical server) where the virtual machine is migrated and used for data forwarding of the virtual machine. The IP address of the second virtual machine gateway is the same as the IP address of the first virtual machine gateway, and the MAC address of the second virtual machine gateway is the same as the MAC address of the first virtual machine gateway.

Specifically, the SDN controller can determine the VTEP IP address of the second physical gateway according to the VTEP IP address of the second physical server, and determine the second physical gateway according to the VTEP IP address of the second physical gateway. Configure the second virtual machine gateway on .

Optionally, the mapping relationship between the physical server and the physical gateway may be pre-established and stored in the SDN controller. Of course, the SDN controller may also establish a mapping relationship between the physical server and the physical gateway when the virtual machine needs to forward data through the virtual machine gateway, which is not limited in the embodiment of the present invention. Wherein, the physical server and the physical gateway can be identified by different VTEP IP addresses. Each physical server has a unique VTEP IP address, and each physical gateway has a unique VTEP IP address.

Wherein, the SDN controller can search for the VTEP IP address of the second physical gateway according to the mapping relationship between the physical server and the physical gateway stored in the SDN controller and the VTEP IP address of the second physical server.

S103, the SDN controller creates a first flow entry, the first flow entry includes the VTEP IP address of the second physical gateway, the IP address of the second virtual machine gateway, the MAC address of the second virtual machine gateway, and the IP address of the virtual machine The mapping relationship between them and the extended virtual local area network VxLAN ID of the virtual machine.

Wherein, the first flow entry is stored in the SDN controller.

S104. The SDN controller sends the first flow entry to the second physical gateway, so that the second physical gateway forwards data for the virtual machine according to the data forwarding policy indicated by the first flow entry.

Among them, the VxLAN ID of the virtual machine is used to identify the network segment where the virtual machine is located. The first flow entry records the mapping relationship between the physical gateway, the virtual machine gateway, and the virtual machine, and the network segment where the virtual machine is located. After the virtual machine is migrated to the second physical server, the second physical gateway may forward data for the virtual machine through the second virtual machine gateway according to the indication of the first flow entry.

In the gateway control method based on virtual machine migration provided by the embodiment of the present invention, the physical server (second physical server) after virtual machine migration is configured on the physical gateway (second physical gateway) that is the same as the physical server (second physical server) before virtual machine migration. The virtual machine gateway (first virtual machine gateway) of the virtual machine configured on the physical gateway (first physical gateway) of the first physical server) has the virtual machine gateway (second virtual machine gateway) with the same IP address and MAC address, It is guaranteed that the virtual machine gateway address (the IP address of the virtual machine gateway and the MAC address of the virtual machine gateway) remains unchanged before and after the virtual machine migration; moreover, the flow table entry recording the mapping relationship between the physical gateway, the virtual machine gateway and the virtual machine can be sent to the second physical gateway, so that the virtual machine can directly pass through the virtual machine gateway (second physical gateway) configured on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine is migrated The virtual machine gateway, that is, the virtual machine gateway with the same IP address and MAC address as the virtual machine gateway before the virtual machine migration) performs data forwarding without detouring to the physical server (the first physical server) where the virtual machine was located before migration The virtual machine gateway (the first virtual machine gateway) configured on the physical gateway (the first physical gateway) performs data forwarding, which can reduce the data traffic for data transmission between devices, thereby reducing the bandwidth occupied by data transmission between devices , can reduce the waste of bandwidth resources to a certain extent.

Example 2

An embodiment of the present invention provides a gateway control method based on virtual machine migration. The first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server. As shown in FIG. 2, when the virtual When the machine is migrated from the first physical server to the second physical server, the method includes:

S201. The SDN controller obtains virtual machine migration information, and the virtual machine migration information includes: the IP address of the virtual machine, the MAC address of the virtual machine, and the VTEP IP address of the second physical server.

Wherein, migrating the virtual machine from the first physical server to the second physical server includes: manually migrating the virtual machine to the second physical server; automatically migrating the virtual machine to the second physical server. The automatic migration of virtual machines requires the support of the cloud management platform. The virtual machine migration information may be reported to the SDN by the cloud management platform, or the SDN controller may send a request to the cloud management platform to obtain the virtual machine migration information, which is not limited in this embodiment of the present invention. The second physical server is the physical server where the virtual machine is migrated, and the physical server can be uniquely identified by the VTEP IP address.

S202. The SDN controller determines the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway according to the IP address of the virtual machine and the MAC address of the virtual machine.

Wherein, the first virtual machine gateway is the virtual machine gateway of the virtual machine virtualized on the physical gateway (first physical gateway) of the physical server (first physical server) where the virtual machine resides before migration and used for data forwarding of the virtual machine. For the method for the SDN controller to determine the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway, reference may be made to relevant descriptions in the foregoing embodiments, and details are not repeated here in the embodiments of the present invention.

S203. The SDN controller determines the VTEP IP address of the second physical gateway according to the VTEP IP address of the second physical server.

Wherein, the second physical gateway is the physical gateway of the second physical server, and the method for the SDN controller to determine the VTEP IP address of the second physical gateway can refer to the relevant descriptions in the above-mentioned embodiments, and the embodiments of the present invention will not be repeated here.

S204. The SDN controller sends the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway to the second physical gateway according to the VTEP IP address of the second physical gateway, so that the second physical gateway uses the VTEP IP address of the first virtual machine The IP address of the gateway and the MAC address of the first virtual machine gateway configure the second virtual machine gateway on the second physical gateway for the virtual machine.

Wherein, the first virtual machine gateway is the virtual machine gateway of the virtual machine virtualized on the physical gateway (first physical gateway) of the physical server (first physical server) where the virtual machine resides before migration and used for data forwarding of the virtual machine. The second virtual machine gateway is the virtual machine gateway of the virtual machine virtualized on the physical gateway (second physical gateway) of the physical server (second physical server) where the virtual machine resides after migration and used for data forwarding of the virtual machine. The IP address of the second virtual machine gateway is the same as the IP address of the first virtual machine gateway, and the MAC address of the second virtual machine gateway is the same as the MAC address of the first virtual machine gateway.

S205. The SDN controller determines the VxLAN ID of the virtual machine according to the IP address of the virtual machine and the MAC address of the virtual machine.

Among them, the VxLAN ID of the virtual machine is used to identify the network segment where the virtual machine is located. The mapping relationship between the virtual machine and the VxLAN ID of the virtual machine can be established in advance and stored in the SDN controller. The SDN controller can search for the VxLAN ID of the virtual machine according to the mapping relationship between the virtual machine and the VxLAN ID of the virtual machine stored in the SDN controller, the IP address of the virtual machine, and the MAC address of the virtual machine.

S206, the SDN controller creates a first flow entry, the first flow entry includes the VTEP IP address of the second physical gateway, the IP address of the second virtual machine gateway, the MAC address of the second virtual machine gateway, and the IP address of the virtual machine The mapping relationship between them and the VxLAN ID of the virtual machine.

Wherein, the first flow entry is stored in the SDN controller, and the first flow entry records the physical gateway after the virtual machine migration, the mapping relationship between the virtual machine gateway of the virtual machine after the virtual machine migration and the virtual machine, and the location of the virtual machine. network segment. After the virtual machine is migrated to the second physical server, the second physical gateway can forward data for the virtual machine according to the instruction of the first flow entry.

S207. The SDN controller sends the first flow entry to the second physical gateway, so that the second physical gateway forwards data for the virtual machine according to the data forwarding policy indicated by the first flow entry.

S208. The SDN controller deletes the second flow entry, which includes the VTEP IP address of the first physical gateway, the IP address of the first virtual machine gateway, the MAC address of the first virtual machine gateway, and the IP of the virtual machine The mapping relationship between addresses and the VxLAN ID of the virtual machine.

Wherein, the second flow entry is stored in the SDN controller, and the second flow entry records the physical gateway before the virtual machine migration, the mapping relationship between the virtual machine gateway of the virtual machine before the virtual machine migration and the virtual machine, and the virtual The network segment where the machine is located.

By establishing the first flow entry and deleting the second flow entry, it is possible to prevent the virtual machine from performing data forwarding through the virtual machine gateway (the first virtual machine gateway) of the virtual machine before the virtual machine migration when performing data transmission. Data forwarding is performed through the virtual machine gateway (second virtual machine gateway) of the virtual machine after the virtual machine migration. This process of forwarding data through the second virtual machine gateway can reduce the data traffic for data transmission between devices, thereby reducing the bandwidth occupied by data transmission between devices.

S209. The SDN controller judges whether there are other virtual machines using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine.

Wherein, the SDN controller can be in the network segment identified by the VxLAN ID of the virtual machine, according to the mapping relationship between the virtual machine gateway and the virtual machine stored in the SDN controller, the IP address of the first virtual machine gateway, and the first virtual machine gateway MAC address of the virtual machine, check whether the IP address of the virtual machine gateway of other virtual machines is the same as the IP address of the first virtual machine gateway, and the MAC address of the virtual machine gateway is the same as the MAC address of the first virtual machine gateway, and then determine whether There are other virtual machines using the first virtual machine gateway. Specifically, if in the network segment identified by the VxLAN ID of the virtual machine, the IP address of the virtual machine gateway of other virtual machines is the same as the IP address of the first virtual machine gateway, and the MAC address of the virtual machine gateway is the same as that of the first virtual machine If the MAC addresses of the gateways are the same, it can be determined that there are other virtual machines using the first virtual machine gateway; if the network segment identified by the VxLAN ID of the virtual machine does not have the same If the IP address of the virtual machine gateway is the same, and the MAC address of the virtual machine gateway is the same as the MAC address of the first virtual machine gateway, it can be determined that no other virtual machine uses the first virtual machine gateway.

S210. If there is no other virtual machine using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine, the SDN controller controls the first physical gateway to delete the first virtual machine gateway configured on the first physical gateway.

Wherein, if there are no other virtual machines using the first virtual machine gateway, deleting the first virtual machine gateway configured on the first physical gateway can reduce physical gateway resources (for example, MAC address table capacity, ARP entry capacity, and routing table item capacity) consumption.

It should be noted that after completing the steps of the virtual machine gateway configuration method above, when the virtual machine needs to forward data through the gateway, the SDN controller controls the second virtual machine gateway configured on the second physical gateway to forward the data of the virtual machine . In the embodiment of the present invention, the communication between the virtual machine 1 and the virtual machine 2 is taken as an example for description. Wherein, virtual machine 1 is a virtual machine that has been migrated. After completing the steps of the virtual machine gateway configuration method described above, as shown in FIG. 3 , the communication process between virtual machine 1 and virtual machine 2 includes:

S301. The virtual machine 1 sends a request for accessing the virtual machine 1 to the virtual switch 1, where the request includes the IP address of the virtual machine 1, the IP address of the virtual machine 2, and a broadcast address.

Wherein, when the virtual machine 1 accesses the virtual machine 2 for the first time, the virtual machine 1 cannot obtain the MAC address of the virtual machine 2, and the MAC address of the virtual machine 2 can be replaced by a broadcast address. To obtain the MAC address of virtual machine 2, virtual machine 1 may obtain the MAC address of virtual machine 2 by sending an ARP request to all virtual machines on the network.

S302. The virtual switch 1 sends an access request to the SDN controller, where the request includes the IP address of the virtual machine 1, the IP address of the virtual machine 2, and the VTEP IP of the physical server where the virtual machine 1 is located.

Wherein, the virtual switch 1 can analyze and obtain the VTEP IP address of the physical server where the virtual machine 1 is located according to the received information reported by the virtual machine 1.

S303. The SDN controller checks the IP address of the virtual machine 1 and the IP address of the virtual machine 2, and determines whether the virtual machine 1 and the virtual machine 2 are in the same network segment.

S304. If the virtual machine 1 and the virtual machine 2 are not in the same network segment, the SDN controller determines the physical gateway 1 closest to the physical location of the virtual machine 1 according to the VTEP IP address of the physical server where the virtual machine 1 is located.

Wherein, the SDN controller can search for the physical gateway 1 closest to the physical location of the virtual machine 1 according to the mapping relationship between the physical server and the physical gateway stored in the SDN controller and the VTEP IP address of the physical server where the virtual machine 1 is located. Gateway 1 is the physical gateway of the physical server after the migration of virtual machine 1 (that is, the second physical gateway in the above description of the embodiment of the present invention), and there is a second virtual machine gateway configured for virtual machine 1 on the physical gateway 1 . Physical location is most recently used to characterize the shortest forwarding path.

S305. The SDN controller sends the IP address of the virtual machine 1, the IP address of the virtual machine 2, the VTEP IP address of the physical server where the virtual machine 1 is located, and the flow entry of the physical gateway 1 to the virtual switch 1.

S306. The virtual switch 1 records the mapping relationship between the VTEP IP address of the physical gateway 1 and the IP address of the virtual machine 2.

S307, the virtual machine 1 sends a request for accessing the virtual machine 2 to the virtual switch 1 again, and the request includes the IP address of the virtual machine 1, the IP address of the virtual machine 2, and the broadcast address.

S308. The virtual switch 1 encapsulates the VTEP IP address of the physical server where the virtual machine 1 is located according to the IP address of the virtual machine 2 to form a message for the virtual machine 1 to access the virtual machine 2.

S309. The virtual switch 1 sends the packet of 1 accessing 2 to the physical gateway 1.

S310. The physical gateway 1 requests the VTEP IP address of the physical server where the virtual machine 2 is located from the SDN controller according to the IP address of the virtual machine 2.

Wherein, the mapping relationship between the virtual machine and the physical server may be established in advance and stored in the SDN controller. The SDN controller can search for the VTEP IP address of the physical server where the virtual machine 2 is located according to the mapping relationship between the virtual machine and the physical server stored in the SDN controller and the IP address of the virtual machine 2.

S311. The SDN controller issues the VTEP IP address of the physical server where the virtual machine 2 is located and the VxLAN ID of the virtual machine 2 to the physical gateway 1.

Among them, the VTEP IP address of the physical server where the virtual machine 2 is located and the VxLAN ID of the virtual machine 2 are used for the physical gateway 1 to encapsulate the VxLAN message.

S312. The physical gateway 1 encapsulates the VxLAN packet.

Among them, the format of the VxLAN message is shown in Figure 4, and the VxLAN encapsulation is added on the basis of the original Ethernet frame. The external target IP address is the VTEP IP address of the physical server where virtual machine 2 is located; the external source IP address is the VTEP IP address of the physical server where virtual machine 1 is located; VxLANID is the VxLAN ID of virtual machine 2. The external target MAC address is the MAC address of physical gateway 1. When virtual machine 2 and virtual machine 1 are under the same physical gateway, the external destination MAC address and external source MAC address are the same; when virtual machine 2 and virtual machine 1 are not under the same physical gateway, the external destination MAC address is that of virtual machine 2 The MAC address of the physical gateway. The external source MAC address is the MAC address of the physical gateway of VM 1.

S313. The physical gateway 1 sends the VxLAN message to the virtual switch 2.

Wherein, the physical gateway 1 sends the VxLAN message to the virtual switch 2 through the second virtual machine gateway configured for the virtual machine 1 on the physical gateway 1 .

S314. The virtual switch 2 decapsulates the VxLAN packet, and sends the original packet to the virtual machine 2.

Wherein, the original packet is a packet of a request for accessing the virtual machine 2 sent by the virtual machine 1 to the virtual switch 1 .

In the gateway control method based on virtual machine migration provided by the embodiment of the present invention, the physical server (second physical server) after virtual machine migration is configured on the physical gateway (second physical gateway) that is the same as the physical server (second physical server) before virtual machine migration. The virtual machine gateway (first virtual machine gateway) of the virtual machine configured on the physical gateway (first physical gateway) of the first physical server) has the virtual machine gateway (second virtual machine gateway) with the same IP address and MAC address, It is guaranteed that the virtual machine gateway address (the IP address of the virtual machine gateway and the MAC address of the virtual machine gateway) remains unchanged before and after the virtual machine migration; moreover, the flow table entry recording the mapping relationship between the physical gateway, the virtual machine gateway and the virtual machine can be sent to the second physical gateway, so that the virtual machine can directly pass through the virtual machine gateway (second physical gateway) configured on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine is migrated The virtual machine gateway, that is, the virtual machine gateway with the same IP address and MAC address as the virtual machine gateway before the virtual machine migration) performs data forwarding without detouring to the physical server (the first physical server) where the virtual machine was located before migration The virtual machine gateway (the first virtual machine gateway) configured on the physical gateway (the first physical gateway) performs data forwarding, which can reduce the data traffic for data transmission between devices, thereby reducing the bandwidth occupied by data transmission between devices , can reduce the waste of bandwidth resources to a certain extent.

Example 3

An embodiment of the present invention provides an SDN controller, the first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server, which is applied to the migration of a virtual machine from the first physical server to the second In the process of the physical server, as shown in FIG. 5 , the SDN controller may include: an acquisition unit 31 , a configuration unit 32 , a creation unit 33 and a sending unit 34 .

The acquisition unit 31 acquires the IP address of the Internet protocol of the first virtual machine gateway, the media access control MAC address of the first virtual machine gateway and the virtual tunnel terminal node VTEP IP address of the second physical server, and the first virtual machine gateway is configured in A virtual machine gateway for a virtual machine on the first physical gateway.

The configuration unit 32 is used to control the second physical gateway to configure the second virtual machine gateway on the second physical gateway for the virtual machine according to the VTEP IP address of the second physical server acquired by the acquisition unit 31, and the IP address of the second virtual machine gateway It is the same as the IP address of the first virtual machine gateway obtained by the obtaining unit, and the MAC address of the second virtual machine gateway is the same as the MAC address of the first virtual machine gateway obtained by the obtaining unit.

Creating unit 33, configured to create a first flow entry, the first flow entry includes the VTEP IP address of the second physical gateway, the IP address of the second virtual machine gateway, the MAC address of the second virtual machine gateway, and the IP address of the virtual machine The mapping relationship between them and the extended virtual local area network VxLAN ID of the virtual machine.

The sending unit 34 is configured to send the first flow entry created by the creation unit 33 to the second physical gateway, so that the second physical gateway forwards data for the virtual machine according to the data forwarding strategy indicated by the first flow entry, and the VxLAN ID of the virtual machine It is used to identify the network segment where the virtual machine resides.

Further, as shown in FIG. 6 , the configuring unit 32 may include: a first determining subunit 321 and a configuring subunit 322 .

The first determination subunit 321 is configured to determine the VTEP IP address of the second physical gateway according to the VTEP IP address of the second physical server.

The configuration subunit 322 is configured to control the second physical gateway to configure the second virtual machine gateway on the second physical gateway for the virtual machine according to the VTEP IP address of the second physical gateway determined by the first determination subunit 321.

Further, the configuration unit 32 is specifically configured to send the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway to the second physical gateway according to the VTEP IP address of the second physical gateway, so that the second physical gateway Configure the second virtual machine gateway on the second physical gateway according to the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway.

Further, as shown in FIG. 7 , the acquiring unit 31 may include: an acquiring subunit 311 and a second determining subunit 312 .

The acquiring subunit 311 is configured to acquire virtual machine migration information, and the virtual machine migration information includes: the IP address of the virtual machine, the MAC address of the virtual machine, and the VTEP IP address of the second physical server.

The second determining subunit 312 is configured to determine the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway according to the IP address of the virtual machine and the MAC address of the virtual machine obtained by the obtaining subunit 311 .

Further, as shown in FIG. 8 , the SDN controller in the embodiment of the present invention may further include a deletion unit 35 .

Deletion unit 35 is used to delete the second flow entry after the creation unit 33 creates the first flow entry. The second flow entry includes the VTEP IP address of the first physical gateway, the IP address of the first virtual machine gateway, the first virtual machine gateway, and the second flow entry. A mapping relationship between the MAC address of the virtual machine gateway and the IP address of the virtual machine and the extended virtual local area network VxLAN ID of the virtual machine.

Further, as shown in FIG. 9 , the SDN controller in the embodiment of the present invention may further include a determination unit 36 .

The determining unit 36 is configured to determine the VxLAN ID of the virtual machine according to the IP address of the virtual machine and the MAC address of the virtual machine after the obtaining unit 31 obtains the virtual machine migration information before the creating unit 33 creates the first flow entry.

Further, as shown in FIG. 10 , the SDN controller in the embodiment of the present invention may further include a judging unit 37 .

The judging unit 37 is configured to judge whether there are other virtual machines using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine after the creating unit 33 creates the first flow entry.

The deletion unit 35 is also used to control the first physical gateway to delete the configuration on the first physical gateway if the judging unit 37 judges that in the network segment identified by the VxLAN ID of the virtual machine, there is no other virtual machine using the first virtual machine gateway. The first virtual machine gateway.

It should be noted that, for the specific description of some functional modules in the SDN controller provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, and details are not described in detail here in this embodiment.

The SDN controller provided by the embodiment of the present invention is configured with the physical server (first physical server) before the virtual machine migration on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine migration The virtual machine gateway (first virtual machine gateway) of the virtual machine configured on the physical gateway (first physical gateway) has the same IP address and MAC address as the virtual machine gateway (second virtual machine gateway), ensuring virtual machine migration The virtual machine gateway address before and after (the IP address of the virtual machine gateway and the MAC address of the virtual machine gateway) is unchanged; and, the flow entry that records the mapping relationship between the physical gateway, the virtual machine gateway and the virtual machine can be sent to the second physical gateway , so that the virtual machine can directly pass through the virtual machine gateway (second virtual machine gateway) configured on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine is migrated. The virtual machine gateway with the same IP address and MAC address as the virtual machine gateway before the virtual machine migration) performs data forwarding without detouring to the physical gateway of the physical server (the first physical server) where the virtual machine is located before the migration (the first physical server) A virtual machine gateway (the first virtual machine gateway) configured on a physical gateway) performs data forwarding, which can reduce the data traffic for data transmission between devices, thereby reducing the bandwidth occupied by data transmission between devices, which can be achieved to a certain extent To reduce the waste of bandwidth resources.

Example 4

An embodiment of the present invention provides an SDN controller, the first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server, which is applied to the migration of a virtual machine from the first physical server to the second In the process of a physical server, as shown in FIG. 11 , the SDN controller may include: a receiver 41 , a processor 42 , a transmitter 43 and a memory 44 .

The receiver 41 is configured to receive the virtual machine migration information, so as to obtain the IP address of the first virtual machine gateway, the media access control MAC address of the first virtual machine gateway, and the virtual tunnel terminal node VTEP IP address of the second physical server , the first virtual machine gateway is the virtual machine gateway of the virtual machine configured on the first physical gateway; the virtual machine migration information includes: the IP address of the virtual machine, the MAC address of the virtual machine and the VTEP IP address of the second physical server.

The processor 42 is configured to control the second physical gateway to configure the second virtual machine gateway on the second physical gateway for the virtual machine according to the VTEP IP address of the second physical server obtained by the receiver 41, and the IP address of the second virtual machine gateway It is the same as the IP address of the first virtual machine gateway obtained by the obtaining unit, and the MAC address of the second virtual machine gateway is the same as the MAC address of the first virtual machine gateway obtained by the obtaining unit; it is also used to create the first flow entry, the first flow The entry contains the VTEP IP address of the second physical gateway, the IP address of the second virtual machine gateway, the mapping relationship between the MAC address of the second virtual machine gateway and the IP address of the virtual machine, and the extended virtual local area network VxLAN of the virtual machine ID.

The sender 43 is configured to send the first flow entry created by the processor 42 to the second physical gateway, so that the second physical gateway forwards data for the virtual machine according to the data forwarding policy indicated by the first flow entry, and the VxLAN ID of the virtual machine It is used to identify the network segment where the virtual machine resides.

Memory 44, for storing the data obtained by receiver 41 and processor 42, such as the IP address of the first virtual machine gateway, the MAC address of the first virtual machine gateway and the VTEP IP address of the second physical server, the second virtual machine gateway The IP address of the second virtual machine gateway, the MAC address of the second virtual machine gateway, the first flow entry, and so on.

Wherein, the receiver 41 and the transmitter 43 may be communication interfaces for the SDN controller to communicate with other devices. The receiver 41 , the processor 42 , the transmitter 43 and the memory 44 are connected through a bus to complete mutual communication.

Wherein, the bus can be an Industry Standard Architecture (Industry Standard Architecture, ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 10 , but it does not mean that there is only one bus or one type of bus.

It should be noted that, in the embodiment of the present invention, the processor 42 can be the control center of the SDN controller, such as a central processing unit (Central Processing Unit, CPU), and the control center can utilize various interfaces and lines Connect various parts of the entire SDN controller. The processor 42 can be made up of an integrated circuit (Integrated Circuit, IC) or a specific integrated circuit (Application Specific Integrated Circuit, ASIC) (for example, the processor 42 can be made up of a single packaged IC), or can be made up of multiple It consists of packaged ICs with the same function or different functions. For example, the processor 42 may only include a CPU, or may be a CPU, an image processor (Graphic Processing Unit, GPU), a digital signal processor (Digital Signal Processor, DSP) and a control chip (such as a baseband chip) in a communication unit. )The combination. In the embodiments of the present invention, the CPU may be a single computing core, or may include multiple computing cores.

Further, the processor 42 is also used to determine the VTEP IP address of the second physical gateway according to the VTEP IP address of the second physical server; Configure the second virtual machine gateway on the physical gateway.

Further, the processor 42 is also configured to send the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway to the second physical gateway according to the VTEP IP address of the second physical gateway, so that the second physical gateway Configure the second virtual machine gateway on the second physical gateway according to the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway.

Further, the processor 42 is further configured to determine the IP address of the first virtual machine gateway and the MAC address of the first virtual machine gateway according to the IP address of the virtual machine and the MAC address of the virtual machine acquired by the receiver 41 .

Further, the processor 42 is also configured to delete the second flow entry after the first flow entry is created, and the second flow entry includes the VTEP IP address of the first physical gateway, the IP address of the first virtual machine gateway, The mapping relationship between the MAC address of the gateway of the first virtual machine and the IP address of the virtual machine and the extended virtual local area network VxLAN ID of the virtual machine.

Further, the processor 42 is also configured to determine the VxLAN ID of the virtual machine according to the IP address of the virtual machine and the MAC address of the virtual machine after the receiver 41 obtains the migration information of the virtual machine before creating the first flow entry.

Further, the processor 42 is also configured to determine whether there are other virtual machines using the first virtual machine gateway in the network segment identified by the VxLAN ID of the virtual machine after the first flow entry is created; In the identified network segment, if there is no other virtual machine using the first virtual machine gateway, the first physical gateway is controlled to delete the first virtual machine gateway configured on the first physical gateway.

It should be noted that, for the specific description of some functional modules in the SDN controller provided in the embodiment of the present invention, reference may be made to the corresponding content in the method embodiment, and details are not described in detail here in this embodiment.

The SDN controller provided by the embodiment of the present invention is configured with the physical server (first physical server) before the virtual machine migration on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine migration The virtual machine gateway (first virtual machine gateway) of the virtual machine configured on the physical gateway (first physical gateway) has the same IP address and MAC address as the virtual machine gateway (second virtual machine gateway), ensuring virtual machine migration The virtual machine gateway address before and after (the IP address of the virtual machine gateway and the MAC address of the virtual machine gateway) is unchanged; and, the flow entry that records the mapping relationship between the physical gateway, the virtual machine gateway and the virtual machine can be sent to the second physical gateway , so that the virtual machine can directly pass through the virtual machine gateway (second virtual machine gateway) configured on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine is migrated. The virtual machine gateway with the same IP address and MAC address as the virtual machine gateway before the virtual machine migration) performs data forwarding without detouring to the physical gateway of the physical server (the first physical server) where the virtual machine is located before the migration (the first physical server) A virtual machine gateway (the first virtual machine gateway) configured on a physical gateway) performs data forwarding, which can reduce the data traffic for data transmission between devices, thereby reducing the bandwidth occupied by data transmission between devices, which can be achieved to a certain extent To reduce the waste of bandwidth resources.

Example 5

An embodiment of the present invention provides a gateway control system based on virtual machine migration. The first physical gateway is the physical gateway of the first physical server, and the second physical gateway is the physical gateway of the second physical server. In the process of migrating the server to the second physical server, as shown in FIG. 12 , the system may include: SDN control 51, virtual machine 52, first physical server 53, first physical gateway 54, first virtual machine gateway 55, second Two physical servers 56 , a second physical gateway 57 and a second virtual machine gateway 58 .

The first virtual machine gateway 55 is the virtual machine gateway of the virtual machine 52 configured on the first physical gateway 54 ; the second virtual machine gateway 58 is the virtual machine gateway of the virtual machine 52 configured on the second physical gateway 57 .

The SDN control 51 is configured to execute the gateway control method based on virtual machine migration according to any one of claims 1-7.

The second physical gateway 57 is configured to configure the second virtual machine gateway 58 on the second physical gateway 57 according to the control of the SDN control 51 .

Wherein, the IP address of the second virtual machine gateway 58 is the same as that of the first virtual machine gateway 55 , and the MAC address of the second virtual machine gateway 58 is the same as that of the first virtual machine gateway 55 .

In the gateway control system based on virtual machine migration provided by an embodiment of the present invention, the physical server (second physical server) after the virtual machine migration is configured on the physical gateway (second physical gateway) that is the same as the physical server (second physical server) before the virtual machine migration. The virtual machine gateway (first virtual machine gateway) of the virtual machine configured on the physical gateway (first physical gateway) of the first physical server) has the virtual machine gateway (second virtual machine gateway) with the same IP address and MAC address, It is guaranteed that the virtual machine gateway address (the IP address of the virtual machine gateway and the MAC address of the virtual machine gateway) remains unchanged before and after the virtual machine migration; moreover, the flow table entry recording the mapping relationship between the physical gateway, the virtual machine gateway and the virtual machine can be sent to the second physical gateway, so that the virtual machine can directly pass through the virtual machine gateway (second physical gateway) configured on the physical gateway (second physical gateway) of the physical server (second physical server) after the virtual machine is migrated The virtual machine gateway, that is, the virtual machine gateway with the same IP address and MAC address as the virtual machine gateway before the virtual machine migration) performs data forwarding without detouring to the physical server (the first physical server) where the virtual machine was located before migration The virtual machine gateway (the first virtual machine gateway) configured on the physical gateway (the first physical gateway) performs data forwarding, which can reduce the data traffic for data transmission between devices, thereby reducing the bandwidth occupied by data transmission between devices , can reduce the waste of bandwidth resources to a certain extent.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (15)

1. the gateway control method based on virtual machine (vm) migration, it is characterized in that, first physical gateway is the physical gateway of the first physical server, second physical gateway is the physical gateway of the second physical server, when virtual machine migrates to described second physical server by described first physical server, described method comprises:

Software defined network SDN controller obtains the virtual channel terminal node VTEP IP address of the Internet protocol IP address of the first virtual machine gateway, the MAC address of described first virtual machine gateway and the second physical server, and described first virtual machine gateway is the virtual machine gateway of the described virtual machine be configured on described first physical gateway;

Described SDN controller is according to the VTEP IP address of described second physical server, controlling described second physical gateway is that described virtual machine configures the second virtual machine gateway on described second physical gateway, the IP address of described second virtual machine gateway is identical with the IP address of described first virtual machine gateway, and the MAC Address of described second virtual machine gateway is identical with the MAC Address of described first virtual machine gateway;

Described SDN controller creates first-class list item, the VTEP IP address of described second physical gateway is comprised in described first-class list item, the IP address of described second virtual machine gateway, the expansion Virtual Local Area Network VxLAN ID of the mapping relations between the MAC Address of described second virtual machine gateway and the IP address of described virtual machine and described virtual machine, and send described first-class list item to described second physical gateway, to make the data retransmission strategy of described second physical gateway indicated by described first-class list item be described virtual machine forwarding data, the VxLAN ID of described virtual machine is for identifying the network segment at described virtual machine place.

2. method according to claim 1, it is characterized in that, described SDN controller is according to the VTEP IP address of described second physical server, and controlling described second physical gateway is that described virtual machine configures the second virtual machine gateway on described second physical gateway, comprising:

Described SDN controller determines the VTEP IP address of described second physical gateway according to the VTEP IP address of described second physical server;

Described SDN controller is according to the VTEP IP address of described second physical gateway, and controlling described second physical gateway is that described virtual machine configures described second virtual machine gateway on described second physical gateway.

3. method according to claim 1 and 2, it is characterized in that, described SDN controller is according to the VTEP IP address of described second physical gateway, and controlling described second physical gateway is that described virtual machine configures described second virtual machine gateway on described second physical gateway, comprising:

Described SDN controller is according to the VTEP IP address of described second physical gateway, send the IP address of described first virtual machine gateway and MAC Address extremely described second physical gateway of described first virtual machine gateway, on described second physical gateway, configure described second virtual machine gateway to make described second physical gateway according to the MAC Address of the IP address of described first virtual machine gateway and described first virtual machine gateway.

4. method according to claim 1 and 2, it is characterized in that, described software defined network SDN controller obtains the virtual channel terminal node VTEP IP address of the Internet protocol IP address of the first virtual machine gateway, the MAC address of described first virtual machine gateway and the second physical server, comprising:

Described SDN controller obtains virtual machine (vm) migration information, and described virtual machine (vm) migration information comprises: the VTEP IP address of the IP address of described virtual machine, the MAC Address of described virtual machine and described second physical server;

Described SDN controller determines the IP address of described first virtual machine gateway and the MAC Address of described first virtual machine gateway according to the IP address of described virtual machine and the MAC Address of described virtual machine.

5. the method according to any one of claim 1-4, is characterized in that, after described SDN controller creates first-class list item, described method also comprises:

Delete second list item, in described second list item, comprise the expansion Virtual Local Area Network VxLAN ID of the VTEPIP address of described first physical gateway, the IP address of the first virtual machine gateway, mapping relations between the MAC Address of described first virtual machine gateway and the IP address of described virtual machine and described virtual machine.

6. method according to claim 4, is characterized in that, before described SDN controller creates first-class list item, after described SDN controller obtains virtual machine (vm) migration information, described method also comprises:

The VxLAN ID of described virtual machine is determined according to the IP address of described virtual machine and the MAC Address of described virtual machine.

7. method according to claim 6, is characterized in that, after the first-class list item of described establishment, described method also comprises:

Judge in the network segment that the VxLAN ID of described virtual machine identifies, whether there is other virtual machines and use described first virtual machine gateway;

If in the network segment that the VxLAN ID of described virtual machine identifies, there is not other virtual machines described and use described first virtual machine gateway, then control described first physical gateway and delete the described first virtual machine gateway that described first physical gateway configures.

8. a software defined network SDN controller, it is characterized in that, first physical gateway is the physical gateway of the first physical server, second physical gateway is the physical gateway of the second physical server, be applied to virtual machine to be migrated to by described first physical server in the process of described second physical server, described SDN controller comprises:

Acquiring unit, for obtaining the virtual channel terminal node VTEP IP address of the Internet protocol IP address of the first virtual machine gateway, the MAC address of described first virtual machine gateway and the second physical server, described first virtual machine gateway is the virtual machine gateway of the described virtual machine be configured on described first physical gateway;

Dispensing unit, for the VTEP IP address of described second physical server obtained according to described acquiring unit, controlling described second physical gateway is that described virtual machine configures the second virtual machine gateway on described second physical gateway, the IP address of the described first virtual machine gateway that IP address and the described acquiring unit of described second virtual machine gateway obtain is identical, and the MAC Address of described first virtual machine gateway that the MAC Address of described second virtual machine gateway and described acquiring unit obtain is identical;

Creating unit, for creating first-class list item, in described first-class list item, comprise the expansion Virtual Local Area Network VxLAN ID of the VTEP IP address of described second physical gateway, the IP address of described second virtual machine gateway, mapping relations between the MAC Address of described second virtual machine gateway and the IP address of described virtual machine and described virtual machine;

Transmitting element, for sending described first-class list item extremely described second physical gateway that creating unit creates, to make the data retransmission strategy of described second physical gateway indicated by described first-class list item be described virtual machine forwarding data, the VxLAN ID of described virtual machine is for identifying the network segment at described virtual machine place.

9. SDN controller according to claim 8, is characterized in that, described dispensing unit, comprising:

First determines subelement, for determining the VTEP IP address of described second physical gateway according to the VTEP IP address of described second physical server;

Configuration subelement, for determining the VTEP IP address of described second physical gateway that subelement is determined according to described first, controlling described second physical gateway is that described virtual machine configures described second virtual machine gateway on described second physical gateway.

10. SDN controller according to claim 8 or claim 9, it is characterized in that, described dispensing unit, specifically for the VTEP IP address according to described second physical gateway, send the IP address of described first virtual machine gateway and MAC Address extremely described second physical gateway of described first virtual machine gateway, on described second physical gateway, configure described second virtual machine gateway to make described second physical gateway according to the MAC Address of the IP address of described first virtual machine gateway and described first virtual machine gateway.

11. SDN controllers according to claim 8 or claim 9, it is characterized in that, described acquiring unit, comprising:

Obtain subelement, for obtaining virtual machine (vm) migration information, described virtual machine (vm) migration information comprises: the VTEP IP address of the IP address of described virtual machine, the MAC Address of described virtual machine and described second physical server;

Second determines subelement, determines the IP address of described first virtual machine gateway and the MAC Address of described first virtual machine gateway for the IP address of described virtual machine that obtains according to described acquisition subelement and the MAC Address of described virtual machine.

12. SDN controllers according to Claim 8 according to any one of-11, is characterized in that, also comprise:

Delete cells, after creating the first-class list item of described establishment in described creating unit, delete second list item, in described second list item, comprise the expansion Virtual Local Area Network VxLAN ID of the VTEP IP address of described first physical gateway, the IP address of the first virtual machine gateway, mapping relations between the MAC Address of described first virtual machine gateway and the IP address of described virtual machine and described virtual machine.

13. SDN controllers according to claim 11, is characterized in that, also comprise:

Determining unit, before creating described first-class list item in described creating unit, after described acquiring unit obtains described virtual machine (vm) migration information, determines the VxLAN ID of described virtual machine according to the IP address of described virtual machine and the MAC Address of described virtual machine.

14. SDN controllers according to claim 10, is characterized in that, also comprise:

Judging unit, after creating described first-class list item in described creating unit, judges in the network segment that the VxLAN ID of described virtual machine identifies, and whether there is other virtual machines and uses described first virtual machine gateway;

Described delete cells, if also judge in the network segment that the VxLANID obtaining described virtual machine identifies for described judging unit, there is not other virtual machines described and use described first virtual machine gateway, then control described first physical gateway and delete the described first virtual machine gateway that described first physical gateway configures.

15. 1 kinds of gateway control system based on virtual machine (vm) migration, it is characterized in that, first physical gateway is the physical gateway of the first physical server, second physical gateway is the physical gateway of the second physical server, be applied to virtual machine to be migrated to by described first physical server in the process of described second physical server, described system comprises: software defined network SDN controller, described virtual machine, described first physical server, described first physical gateway, first virtual machine gateway, described second physical server, described second physical gateway and the second virtual machine gateway,

Described first virtual machine gateway is the virtual machine gateway of the described virtual machine be configured on described first physical gateway; Described second virtual machine gateway is the virtual machine gateway of the described virtual machine be configured on described second physical gateway;

Described SDN controller, for performing the gateway control method based on virtual machine (vm) migration according to any one of claim 1-7;

Second physical gateway, for the control according to described SDN controller, described second physical gateway configures described second virtual machine gateway;

Wherein, the Internet protocol IP address of described second virtual machine gateway is identical with the IP address of described first virtual machine gateway, and the MAC Address of described second virtual machine gateway is identical with the MAC address of described first virtual machine gateway.