WO2021218026A1

WO2021218026A1 - Sdn controller-based multicast method and system in host overlay network, device, and medium

Info

Publication number: WO2021218026A1
Application number: PCT/CN2020/118903
Authority: WO
Inventors: 黄斌
Original assignee: 平安科技（深圳）有限公司
Priority date: 2020-04-30
Filing date: 2020-09-29
Publication date: 2021-11-04
Also published as: CN111585900B; CN111585900A

Abstract

The present application relates to the technical field of artificial intelligence. Disclosed are an SDN controller-based multicast method and system in a host overlay network. Multicast group information of an overlay network is controlled in a centralized manner by adopting an SDN controller; a multicast flow rule is generated according to the understanding of the whole network topology by the controller, and issued to a distributed virtual router on a host so as to be executed; when a data plane flow table is delivered, according to obtained interface information, packet information is directly sent to an interface where a multicast group member is located; a flooding problem of a multicast packet on a second layer is well restrained by using an accurate delivery mode, thus avoiding the phenomenon of heavy network burdens.

Description

Multicast method, system, equipment and medium based on SDN controller in host overlay network

This application is required to be submitted to the Chinese Patent Office on April 30, 2020, the application number is CN 202010364674.5, the priority of the Chinese patent application titled "SDN Controller-based Multicast Method in Host Overlay Network", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of Internet technology in artificial intelligence, and in particular to a multicast method based on the SDN controller in the host overlay network and a corresponding multicast system based on the SDN controller in the host overlay network.

Background technique

The overlay network is to build a logical network on a physical network and re-encapsulate the two-layer data packet in the user datagram protocol. The existing overlay network targets physical servers and uses physical switches as edge devices.

The existing unicast, broadcast, and multicast methods all have certain drawbacks. In the broadcast mode, information will be sent to hosts that do not need the information, thereby wasting bandwidth resources and even causing a broadcast storm; while in the unicast mode, Bandwidth resources will be wasted due to multiple repetitions of data packets.

technical problem

The inventor realized that only using the multicast method will also cause the broadcast domain of each virtual network in the large Layer 2 network to be extended to all VNE devices, which will cause flooding problems, and broadcast packets will be flooded. On all hosts in the broadcast domain, the number of hosts may be as many as hundreds, which causes a heavy burden on the network.

Technical solutions

The embodiment of the application discloses an SDN-based The multicast method of the controller is applied to a host overlay network, the host overlay network includes a tunnel, a source virtual port at both ends of the tunnel, and a peer virtual port, including the steps:

Obtain source virtual port information through the host overlay network, where the source virtual port information includes a multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address of the multicast group Address and member information;

Parse out the destination interface information according to the member information;

The virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table.

The embodiment of the application discloses a multicast system based on an SDN controller in a host overlay network. The host overlay network includes a tunnel and source virtual ports and opposite virtual ports located at both ends of the tunnel, including:

The information acquisition module is configured to acquire source virtual port information through the host overlay network, where the source virtual port information includes multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes group Broadcast group’s IP address and member information;

The information analysis module is used to parse out the destination interface information according to the member information;

The message forwarding module is used for the virtual switch to generate a data plane flow table according to the destination interface information, the message information and the IP address of the multicast group, and forward the message information according to the data plane flow table.

An embodiment of the present application discloses an electronic device including a processor, a memory, and a computer program stored on the memory and capable of running on the processor, and the computer program is executed by the processor to implement the following steps :

The embodiment of the present application discloses a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Description of the drawings

FIG. 1 is a flowchart of an embodiment of a multicast method based on an SDN controller in a host overlay network of the present application;

2 is a flowchart of another embodiment of the multicast method based on the SDN controller in the host overlay network of the present application;

3 is a flowchart of another embodiment of the multicast method based on the SDN controller in the host overlay network of the present application;

FIG. 4 is a structural block diagram of an embodiment of a multicast system based on an SDN controller in a host overlay network of the present application;

FIG. 5 is a structural block diagram of an embodiment of a multicast system based on an SDN controller in a host overlay network of the present application;

Fig. 6 is a structural block diagram of an embodiment of a multicast system based on an SDN controller in a host overlay network of the present application.

Embodiments of the present invention

In order to make the above objectives, features, and advantages of the application more obvious and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific implementations.

One of the core concepts of the embodiments of this application is to provide a multicast method and system based on an SDN controller in a host overlay network. The host overlay network includes a tunnel, a source virtual port at both ends of the tunnel, and a peer virtual port. The host overlay network obtains the source virtual port information, where the source virtual port information includes the multicast group, peer virtual port location information and message information, and the peer virtual port location information includes the IP address and member information of the multicast group; The information parses out the destination interface information; the virtual switch generates a data plane flow table according to the destination interface information, message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table. The SDN controller is used to centrally control the multicast group information of the overlay network. When the data plane flow table is delivered, it is directly sent to the virtual network port (vport) where the multicast group member is located. The precise delivery method is used, which is better suppressed. The flooding of multicast packets at the second layer solves the problem of heavy burden on the network.

Referring to Figures 1-3, there is shown a flow chart of an embodiment of a method for multicasting in a host overlay network based on an SDN controller of the present application. The host overlay network includes a tunnel and a source virtual port at both ends of the tunnel and a peer virtual port. Port, which can specifically include the following steps:

S100: Obtain source virtual port information through the host overlay network, where the source virtual port information includes the multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address and member information of the multicast group ；

S200: parse out the destination interface information according to the member information;

In S300, the virtual switch (vSwitch) generates a data plane flow table according to the destination interface information, message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table.

The SDN controller is used to centrally control the multicast group information of the overlay network. When the data plane flow table is delivered, it is directly sent to the interface where the multicast group member is located. The precise delivery method is used to better suppress the multicast message in The flooding problem of the second layer solves the problem of heavy burden on the network.

As described in step S100 above, NVE (Network Virtrualization Edge, network virtual edge node) is a functional entity that realizes network virtualization. After the packets in the VM are encapsulated by the network virtual edge node, the network virtual edge nodes can be based on The L2 virtual network is established on the basis of the L3 network. Both the network device entity and the virtual switch (vSwitch) on the server entity can be used as network virtual edge nodes. VTEP is the endpoint of the VXLAN tunnel, encapsulated in the virtual edge node of the network, and used for encapsulation and decapsulation of VXLAN packets. The VTEP is connected to the physical network, and the assigned address is the physical network IP address. The source virtual port information is obtained through the host overlay network. The source virtual port information includes the multicast group, the location information of the peer virtual port, and message information, and the location information of the peer virtual port includes the IP address and member information of the multicast group. It mainly includes SDN controller, Underlay network equipment and physical host. The SDN controller is responsible for the orchestration function of the virtualized network and can obtain all the information of the virtual machine virtual network port (vport). The information of the above interface includes But not limited to: IP (Internet Protocol), MAC (Media Access Control), vtep info (endpoint domain name), and is responsible for sending all the interface information of the virtual network domain to the virtual network. Host. The lower-layer network equipment is mainly responsible for the IP intercommunication of the lower-layer network, and adopts the traditional CLOS architecture deployment. The physical host is used to install the host to cover the related soft bearer virtual machine and virtual machine network, and the software realizes the functions of virtual switch, vRouter and vtep. Between the host vtep is the full mesh vxlan (Virtual eXtensible LAN, expandable virtual local area network) network.

As described in the above step S200, the destination interface information is parsed according to the member information, and the message information can be directly transmitted to the opposite virtual port, avoiding the flooding of the message at the second layer and reducing the burden on the network.

As described in step S300 above, the virtual switch (vSwitch) generates a data plane flow table according to the destination interface information, message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table. The virtual switch copies the above-mentioned message at the head end according to the preset rule, and then forwards it. The above-mentioned forwarding method is low in cost, does not depend on the router's support for multicast in the network, and does not require users to adapt or install software at the application level.

In this embodiment, obtaining source virtual port information through the host overlay network includes:

S110: Obtain member information and IP addresses of the multicast group through a preset application program interface;

S120: Create a multicast group according to the member information and the IP address.

As mentioned in the above steps, users can create multicast groups and customize multicast members to avoid running multicast routing protocols on the host overlay network. The above-mentioned multicast group creation is mainly when tenants create multicast groups through interfaces and specify IP addresses , And then the tenant adds the required virtual network port IP to the above multicast group. When the multicast group changes or the members change, the tenant can delete or add the multicast group or the members of the multicast group by itself. The above-mentioned tenant creation ports include but are not limited to portal and API (Application Programming Interface), Portal is a kind of WEB site serving as a gateway to the Internet. It adopts a simple multicast group management mechanism, and flexibly creates, joins and leaves multicast groups, avoids the use of complex multicast management and routing protocols in the overlay network, and provides users with convenient multicast management methods.

In this embodiment, the virtual switch (vSwitch) generates the data plane flow table according to the destination interface information, the message information and the IP address of the multicast group, and the step S300 of forwarding the message information according to the data plane flow table includes:

S310: Determine whether the source virtual port (vport) is a local interface or a remote interface based on the location information of the source virtual port;

S320: If the source virtual port is a local interface, set the location information of the source virtual port to local interface information, and the virtual switch (vSwitch) generates a data plane flow table according to the destination interface information, message information, and local interface information, and according to the data plane flow The table forwards the message information to the opposite virtual port;

S330: If the source virtual port is a remote interface, obtain the local vxlan tunnel information, send the message information to the opposite end vtep through the local vxlan tunnel information, and forward the message information header to the opposite end through the opposite end vtep Virtual port.

As mentioned in the above steps, the physical host server traverses all members, finds the member’s interface location information based on their IP addresses, and determines whether the member’s interface is a local interface or a remote interface. If the member’s interface is a local interface, the multicast If the member and the multicast source are on the same host, the virtual switch directly copies the packet at the head end, so that the virtual switch forwards the message according to the destination interface information. If the interface of the above-mentioned member is a remote interface, the local vxlan tunnel information is obtained, and after the above-mentioned message is copied, the message is forwarded to the destination interface information through the vxlan tunnel interface. The above-mentioned destination interface information is the opposite end vtep, which is forwarded to the corresponding interface after stripping the header of the vxlan packet.

In this embodiment, the virtual switch (vSwitch) generates a data plane flow table according to the destination interface information, message information, and the IP address of the multicast group, and before step S300 of forwarding message information according to the data plane flow table, the method further includes:

Determine whether the source virtual port is an unconfigured multicast group;

If the multicast group is an unconfigured multicast group, the virtual switch (vSwitch) directly discards the message information of the source virtual port.

As described in the above steps, when the above multicast group is not configured, the packets of the source virtual port are directly discarded, thereby effectively reducing the resource occupation of the network when processing unknown packets and reducing unnecessary unknown packets The impact on the network effectively reduces the burden on the network.

In this embodiment, the SDN controller (controller) includes a global controller (global controller) and a local controller (local controller), and the multicast group includes global multicast location information and local area multicast location information, and the host covers the network Obtain the source virtual port information. The source virtual port information includes the multicast group, peer virtual port location information and message information. Before the peer virtual port location information includes the IP address and member information of the multicast group, it also includes:

Obtain and call the global multicast location information through the global controller, and obtain and call the local multicast location information through the local controller.

As described in the above steps, the SDN controller is used to centrally control the multicast group information of the overlay network, relying on the SDN controller to understand the topology of the entire network, and the rules for multicast traffic are issued to the distributed virtual router on the host for execution. . In the case of a relatively large network, a hierarchical SDN controller can be used to handle it, the global controller is used to maintain global multicast location information, and the local controller is used to maintain local location information.

In this embodiment, the virtual switch (vSwitch) generates a data plane flow table according to the destination interface information, message information, and the IP address of the multicast group, and after forwarding the message information according to the data plane flow table, it further includes:

Determine whether the location information of the opposite virtual port is migrated;

If yes, collect the second peer virtual port location information through the orchestrator, and send the second peer virtual port location information to the physical host server. The second peer virtual port location information is the migrated peer virtual port location information .

As described in the above steps, in the case of virtual machine migration, the SDN controller obtains the corresponding information from the migrated IP address to the interface by interacting with the orchestrator, and sends it to the physical host server. In the case of VM migration, it can effectively ensure the update of the virtual machine's IP address and interface information.

In this embodiment, the virtual switch (vSwitch) generates a data plane flow table according to the destination interface information, message information, and the IP address of the multicast group, and after the step of forwarding the message information according to the data plane flow table, it further includes:

Determine whether the location information of the opposite virtual port is in a floating state;

If it is, the preset address resolution protocol is issued to extract the address correspondence, the actual mapping is queried according to the address correspondence, and the mapping is sent to the virtual switch.

As mentioned in the above steps, in the case of floating IP, the rules for handling gratuitous ARP (Address Resolution Protocol) will be issued to the host in advance, and all free address resolution protocol packets will be intercepted by the host’s virtual switch and extracted The corresponding relationship between IP and mac is notified to the SDN controller in the reverse direction. The SDN controller finds the real IP-to-interface mapping according to the location information it has mastered, and then sends it to the host in the virtual network to complete the update.

The embodiments of the present application include the following advantages: the SDN controller is used to centrally control the multicast group information of the overlay network, and the multicast traffic rules are generated according to the controller’s knowledge of the entire network topology, and sent to the distributed virtual router on the host for execution, In the data plane flow table delivery, the message information is directly sent to the interface where the multicast group member is located according to the obtained interface information, and the precise delivery method is used to better suppress the spread of the multicast message at the second layer. The flood problem solves the problem of heavy burden on the Internet.

Through this method, the multicast support problem of the overlay network is solved at the level of the cloud network infrastructure. Through the head-end replication technology, when the flow table is delivered, it will only be sent to the interface where the members of the multicast group are located, which better suppresses the flooding of multicast packets at Layer 2 and does not cause a great network burden. This method uses simple multicast group creation, joining and leaving mechanisms, avoids the use of complex multicast management and routing protocols in the overlay network, and provides users with a more convenient multicast management method. By intercepting the free address resolution protocol on the host side and informing the controller in reverse, the location information of the multicast member interface can be effectively updated to support some user stories of IP migration. The method can be implemented by all software, the cost is low, the router hardware in the network does not rely on the support of multicast, and the user does not need to adapt at the application level or install a software proxy.

It should be noted that for the method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present application are not limited by the described sequence of actions, because According to the embodiments of the present application, some steps may be performed in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

Referring to Figures 4-6, there is shown a structural block diagram of an embodiment of a multicast system based on an SDN controller in a host overlay network of the present application. The host overlay network includes a tunnel and a source virtual port and a peer virtual port located at both ends of the tunnel. , By forwarding data from the source virtual port to the opposite virtual port, the specific modules may include the following:

The information acquisition module 100 is configured to acquire source virtual port information through the host overlay network, where the source virtual port information includes multicast group, peer virtual port location information, and message information, and peer virtual port location information includes multicast group information. IP address and member information;

The information analysis module 200 is used to parse out the target interface information according to the member information;

The message forwarding module 300 is used for a virtual switch (vSwitch) to generate a data plane flow table according to destination interface information, message information, and multicast group IP addresses, and forward message information according to the data plane flow table.

In this embodiment, the information acquisition module 100 includes:

The information obtaining sub-module 110 is used to obtain member information and IP addresses of the multicast group through a preset application program interface;

The multicast group creation sub-module 120 is used to create a multicast group according to the member information and the IP address.

In this embodiment, the message forwarding module 300 includes:

The port judgment sub-module 310 is used to judge whether the source virtual port is a local interface or a remote interface based on the location information of the source virtual port;

The local port submodule 320 is used to set the source virtual port location information as the local interface information if the source virtual port is a local interface, and the virtual switch (vSwitch) generates a data plane stream according to the destination interface information, message information, and local interface information Table, forward the message information to the opposite virtual port according to the data plane flow table;

The remote port submodule 330 is used to obtain the local vxlan tunnel information if the source virtual port is a remote interface, send the message information to the opposite vtep through the vxlan tunnel, and strip the header of the message information through the opposite vtep Then forward to the opposite virtual port.

In this embodiment, it also includes:

The first judgment module is used to judge whether the source virtual port is an unconfigured multicast group;

The message discarding module is used for if the multicast group is an unconfigured multicast group, the virtual switch (vSwitch) directly discards the message information of the source virtual port.

In this embodiment, the SDN controller includes a global controller and a local controller, and the multicast group includes global multicast location information and local area multicast location information, and further includes:

The hierarchical processing module is used to obtain and call the global multicast location information through the global controller, and obtain and call the local multicast location information through the local controller.

In this embodiment, it also includes:

The migration judgment module is used to judge whether the location information of the opposite virtual port is migrated;

The information update module is used to collect the location information of the second opposite end virtual port through the orchestrator if the location information of the opposite end virtual port is migrated, and send the second opposite end virtual port location information to the physical host server, and the second opposite end The virtual port location information is the remote virtual port location information after migration.

In this embodiment, it also includes:

Floating judgment module for judging whether the location information of the opposite virtual port is in a floating state;

The address mapping module is configured to, if the location information of the virtual port at the opposite end is in a floating state, issue a preset address resolution protocol to extract its address correspondence, query the actual mapping according to the address correspondence, and send the mapping to the virtual switch.

As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to the part of the description of the method embodiment.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The embodiment of the application discloses an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, the above-mentioned SDN-based controller is used to cover the host computer. Steps of the network's multicast method.

The computer device includes a processor, a memory, and a network interface connected through a system bus, where the memory includes a non-volatile and/or volatile memory.

The processor is used to provide computing and control capabilities and support the operation of the entire computer equipment. The processor is used to provide computing and control capabilities and support the operation of the entire computer equipment.

The internal memory provides an environment for the operation of the computer program in the non-volatile storage medium, and when the computer program is executed by the processor, the processor can execute any location identification method based on the location service.

The network interface is used for network communication, such as sending assigned tasks. Those skilled in the art can understand that the structure of the computer device is only a block diagram of part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include More or fewer components are shown in the figure, or some components are combined, or have different component arrangements.

It should be understood that the processor may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSPs), and application specific integrated circuits (Application Specific Integrated Circuits). Circuit, ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor.

The embodiment of the present application discloses a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned multicast method based on the SDN controller in the host overlay network are realized.

Wherein, the computer-readable storage medium may include non-volatile and/or volatile memory.

Those skilled in the art should understand that the embodiments of the embodiments of the present application may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present application may adopt the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

The embodiments of this application are described with reference to the flowcharts and/or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing terminal equipment to generate a machine, so that instructions executed by the processor of the computer or other programmable data processing terminal equipment Produce means for realizing the functions specified in one flow or multiple flows in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing terminal equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The instruction device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing terminal equipment, so that a series of operation steps are executed on the computer or other programmable terminal equipment to produce computer-implemented processing, so that the computer or other programmable terminal equipment The instructions executed above provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the preferred embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities. Or there is any such actual relationship or sequence between operations. Moreover, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes those elements that are not explicitly listed. Other elements listed, or also include elements inherent to this process, method, article, or terminal device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other same elements in the process, method, article, or terminal device that includes the element.

The above provides a detailed introduction to a multicast method based on the SDN controller in the host overlay network and a multicast system based on the SDN controller in the host overlay network provided by this application, and specific examples are used in this article. The principle and implementation of the application are described. The description of the above embodiments is only used to help understand the methods and core ideas of the application; at the same time, for those of ordinary skill in the art, in accordance with the ideas of the application, the specific implementation There will be changes in the scope of application and the scope of application. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

A multicast method based on an SDN controller, which is applied to a host overlay network, the host overlay network including a tunnel, a source virtual port at both ends of the tunnel, and a peer virtual port, including the steps:

Obtain source virtual port information through the host overlay network, where the source virtual port information includes a multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address of the multicast group Address and member information;

Parse out the destination interface information according to the member information;

The virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table.
The method according to claim 1, wherein said obtaining source virtual port information through a host overlay network comprises:

Obtaining the member information and IP address of the multicast group through a preset application program interface;

Creating the multicast group according to the member information and the IP address.
The method according to claim 1, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the data plane flow table according to the data plane flow table The message information includes:

Judging whether the source virtual port is a local interface or a remote interface based on the source virtual port location information;

If the source virtual port is a local interface, the source virtual port location information is set as local interface information, and the virtual switch generates a data plane according to the destination interface information, the message information, and the local interface information A flow table, forwarding the message information to the opposite virtual port according to the data plane flow table;

If the source virtual port is a remote interface, obtain local vxlan tunnel information, send the message information to the opposite end vtep through the local vxlan tunnel information, and strip the message information through the opposite end vtep And then forwarded to the opposite virtual port.
The method according to claim 1, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the data plane flow table according to the data plane flow table Before the message information, it also includes:

Judging whether the source virtual port is an unconfigured multicast group;

If the multicast group is an unconfigured multicast group, the virtual switch directly discards the message information of the source virtual port.
The method according to claim 1, wherein the SDN controller includes a global controller and a local controller, the multicast group includes global multicast location information and local area multicast location information, and the network is covered by a host Obtain source virtual port information, where the source virtual port information includes a multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address and member information of the multicast group, Also includes:

The global multicast location information is acquired and called by the global controller, and the local multicast location information is acquired and called by the local controller.
The method according to claim 1, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the data plane flow table according to the data plane flow table After the message information, it also includes:

Judging whether the location information of the opposite virtual port is migrated;

If yes, collect the second peer virtual port location information through the orchestrator, and send the second peer virtual port location information to the physical host server, and the second peer virtual port location information is the migrated peer Virtual port location information.
The method according to claim 1, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the data plane flow table according to the data plane flow table After the message information, it also includes:

Judging whether the location information of the opposite virtual port is in a floating state;

If it is, the preset address resolution protocol is issued to extract the address correspondence, the actual mapping is queried according to the address correspondence, and the mapping is sent to the virtual switch.
A multicast system based on an SDN controller in a host overlay network, wherein the host overlay network includes a tunnel and source virtual ports and opposite virtual ports located at both ends of the tunnel, including:

The information acquisition module is configured to acquire source virtual port information through the host overlay network, where the source virtual port information includes multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes group Broadcast group’s IP address and member information;

The information analysis module is used to parse out the destination interface information according to the member information;

The message forwarding module is used for the virtual switch to generate a data plane flow table according to the destination interface information, the message information and the IP address of the multicast group, and forward the message information according to the data plane flow table.
An electronic device, which includes a processor, a memory, and a computer program stored on the memory and capable of running on the processor, and the computer program implements the following steps when the computer program is executed by the processor:

Obtain source virtual port information through the host overlay network, where the source virtual port information includes a multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address of the multicast group Address and member information;

Parse out the destination interface information according to the member information;

The virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table.
The electronic device according to claim 9, wherein said obtaining source virtual port information through a host overlay network comprises:

Obtaining the member information and IP address of the multicast group through a preset application program interface;

Creating the multicast group according to the member information and the IP address.
The electronic device according to claim 9, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and according to the data plane flow table Forwarding the message information includes:

Judging whether the source virtual port is a local interface or a remote interface based on the source virtual port location information;

If the source virtual port is a local interface, the source virtual port location information is set as local interface information, and the virtual switch generates a data plane according to the destination interface information, the message information, and the local interface information A flow table, forwarding the message information to the opposite virtual port according to the data plane flow table;

If the source virtual port is a remote interface, obtain local vxlan tunnel information, send the message information to the opposite end vtep through the local vxlan tunnel information, and strip the message information through the opposite end vtep And then forwarded to the opposite virtual port.
The electronic device according to claim 9, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and according to the data plane flow table Before forwarding the message information, it also includes:

Judging whether the source virtual port is an unconfigured multicast group;

If the multicast group is an unconfigured multicast group, the virtual switch directly discards the message information of the source virtual port.
The electronic device according to claim 9, wherein the SDN controller includes a global controller and a local controller, the multicast group includes global multicast location information and local area multicast location information, and the host coverage The network obtains source virtual port information, where the source virtual port information includes multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address and member information of the multicast group. ,Also includes:

The global multicast location information is acquired and called by the global controller, and the local multicast location information is acquired and called by the local controller.
The electronic device according to claim 9, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and according to the data plane flow table After forwarding the message information, it also includes:

Judging whether the location information of the opposite virtual port is migrated;

If yes, collect the second peer virtual port location information through the orchestrator, and send the second peer virtual port location information to the physical host server, and the second peer virtual port location information is the migrated peer Virtual port location information.
The electronic device according to claim 9, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and according to the data plane flow table After forwarding the message information, it also includes:

Judging whether the location information of the opposite virtual port is in a floating state;

If it is, the preset address resolution protocol is issued to extract the address correspondence, the actual mapping is queried according to the address correspondence, and the mapping is sent to the virtual switch.
A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the following steps are implemented:

Obtain source virtual port information through the host overlay network, where the source virtual port information includes a multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address of the multicast group Address and member information;

Parse out the destination interface information according to the member information;

The virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and forwards the message information according to the data plane flow table.
The computer-readable storage medium according to claim 16, wherein said obtaining source virtual port information through a host overlay network comprises:

Obtaining the member information and IP address of the multicast group through a preset application program interface;

Creating the multicast group according to the member information and the IP address.
The computer-readable storage medium according to claim 16, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and according to the data The message information forwarded by the surface flow table includes:

Judging whether the source virtual port is a local interface or a remote interface based on the source virtual port location information;

If the source virtual port is a local interface, the source virtual port location information is set as local interface information, and the virtual switch generates a data plane according to the destination interface information, the message information, and the local interface information A flow table, forwarding the message information to the opposite virtual port according to the data plane flow table;

If the source virtual port is a remote interface, obtain local vxlan tunnel information, send the message information to the opposite end vtep through the local vxlan tunnel information, and strip the message information through the opposite end vtep And then forwarded to the opposite virtual port.
The computer-readable storage medium according to claim 16, wherein the virtual switch generates a data plane flow table according to the destination interface information, the message information, and the IP address of the multicast group, and according to the data Before forwarding the message information, the surface flow table also includes:

Judging whether the source virtual port is an unconfigured multicast group;

If the multicast group is an unconfigured multicast group, the virtual switch directly discards the message information of the source virtual port.
The computer-readable storage medium according to claim 16, wherein the SDN controller includes a global controller and a local controller, the multicast group includes global multicast location information and local area multicast location information, and Obtain source virtual port information through the host overlay network, where the source virtual port information includes a multicast group, peer virtual port location information, and message information, and the peer virtual port location information includes the IP address of the multicast group and Before the member information, it also includes:

The global multicast location information is acquired and called by the global controller, and the local multicast location information is acquired and called by the local controller.