CN115297055B - Public cloud host migration arp table item updating method - Google Patents
Public cloud host migration arp table item updating method Download PDFInfo
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- CN115297055B CN115297055B CN202210884417.3A CN202210884417A CN115297055B CN 115297055 B CN115297055 B CN 115297055B CN 202210884417 A CN202210884417 A CN 202210884417A CN 115297055 B CN115297055 B CN 115297055B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000005012 migration Effects 0.000 title claims abstract description 34
- 238000013508 migration Methods 0.000 title claims abstract description 34
- 238000004806 packaging method and process Methods 0.000 claims abstract description 3
- 238000004590 computer program Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
- H04L49/3009—Header conversion, routing tables or routing tags
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/354—Switches specially adapted for specific applications for supporting virtual local area networks [VLAN]
Abstract
The invention provides a public cloud host migration arp table item updating method, which comprises a virtual machine online method and a virtual machine migration method; the virtual machine online method comprises the following steps: sending ip and mac to a switch, packaging six-tuple information by the switch, and sending the six-tuple information to a controller; the virtual machine migration method comprises the following steps: and sending an arp to the switch, informing the controller of updating the six-tuple information by the switch, enabling other virtual machines to not update the six-tuple information, enabling the access flow to continue to the old switch, relaying the flow to the informed switch at the moment by the switch, informing of updating the six-tuple information, and establishing a tunnel and communicating the flow through the VTEP ip in the six-tuple information. The invention has the beneficial effects that: the utility model provides a public cloud host migration arp table item updating method, which avoids the problem of traffic failure caused by virtual machine migration, and simultaneously provides a six-tuple concept, and the six-tuple concept directly establishes connection through a tunnel, thereby improving the flexibility of a platform and enabling virtual machines in the cloud to access more quickly.
Description
Technical Field
The invention belongs to the technical field of cloud hosts, and particularly relates to a method for updating an art table of migration of a public cloud host.
Background
Two layers of communication are arranged between virtual machines under the public cloud subnetwork, and the information of the MAC forwarding table is maintained through destination address checking MAC forwarding table, automatic learning (according to source MAC address learning) and aging mechanism (timing mechanism), and MAC address learning is strongly dependent on the flooding of ARP broadcast packets. This wastes the bandwidth of the switch by flooding, and also increases the CPU resource consumption. The method is characterized in that the control plane exists in the arp table entries, classification is carried out according to a certain rule, if a certain virtual machine is to be accessed, the control plane is removed to obtain the arp table entries, so that the problem of flooding the arp table entries is avoided, the timeliness and the accuracy of the arp are ensured, and the flow between the virtual machines is directly influenced.
Disclosure of Invention
In view of the above, the present invention is directed to a method for updating an art table of migration of public cloud hosts, so as to at least solve at least one problem in the background art.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a public cloud host migration arp table entry updating method comprises a virtual machine online method and a virtual machine migration method;
the virtual machine online method comprises the following steps: sending ip and mac to a switch, packaging six-tuple information by the switch, and sending the six-tuple information to a controller;
the virtual machine migration method comprises the following steps: and sending an arp to the switch, informing the controller of updating the six-tuple information by the switch, enabling other virtual machines to not update the six-tuple information, enabling the access flow to continue to the old switch, relaying the flow to the informed switch at the moment by the switch, informing of updating the six-tuple information, and establishing a tunnel and communicating the flow through the VTEP ip in the six-tuple information.
Further, the virtual machine migration method comprises the following steps:
a1, migrating a virtual machine VM1 to other servers;
a2, transmitting the arp information;
a3, the connected switch sends six-tuple information to the controller;
a4, the controller updates six-tuple information;
a5, accessing VM1 by other virtual machines;
a6, the switch S1 where the VM1 is located relays to the target switch;
and A7, S1, informing the source virtual machine that the target virtual machine has been migrated, and updating six-tuple information.
In a second aspect, the present disclosure provides an electronic device comprising a processor and a memory communicatively coupled to the processor for storing executable instructions for the processor, wherein: the processor is configured to execute the method for updating the map table entry of the public cloud host migration.
In a third aspect, the present disclosure discloses a server, including at least one processor, and a memory communicatively connected to the processor, where the memory stores instructions executable by the at least one processor, where the instructions are executed by the processor, so that the at least one processor performs a public cloud host migration arp entry updating method according to the first aspect.
Fourth aspect the present disclosure discloses a computer readable storage medium storing a computer program, where the computer program when executed by a processor implements a method for updating an art table entry of migration of a public cloud host according to the first aspect.
Compared with the prior art, the method for updating the map table of the public cloud host migration of the cloud host has the following beneficial effects:
(1) According to the method for updating the map table of the public cloud host migration, the problem of traffic failure caused by virtual machine migration is avoided, meanwhile, a six-tuple concept is provided, connection is directly established through a tunnel, the flexibility of a platform is improved, and virtual machines in the cloud are accessed more quickly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a method for updating an art table of migration of a public cloud host according to an embodiment of the present invention;
FIG. 2 is an map transmission schematic diagram of an art table entry updating method for migrating an art by a public cloud host according to an embodiment of the present invention;
fig. 3 is a virtual machine migration schematic diagram of a public cloud host migration arp table entry updating method according to an embodiment of the invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The control plane exists in the arp table entry, but the problem of flooding can be solved, but new problems are brought, after virtual machine migration, how to update the routing table entry rapidly, and the virtual machine traffic after migration is determined to be reachable. And removing the four-tuple model, and adding six-tuple models, namely VTEP IP virtual machine IP, virtual machine mac, vlan of virtual machine, vxlan and l2vni of the switch. The IP address of the virtual machine is taken as a barrel TAG, the virtual machine is on line, an arp packet is sent to a switch, the switch sends six-tuple information to a controller, and the controller takes the IP as a barrel mark to record the six-tuple. When the exchanger inquires mac of the virtual machine, the IP is used as an index to match vxlan and l2vni. And after successful matching, returning the mac address of the target virtual machine. After migration of the virtual machine, six-tuple information of the modified virtual machine is updated, and parameters which can be changed are VTEP IP and vlan values. At this time, six-tuple information cached by the switch needs to be updated. At this time, other switches that have learned old six-tuple information do not update new six-tuple information, e.g., the current virtual machine switch S1, and the switch after migration is S11. And the other virtual machines access the migrated virtual machine, the flow goes to S1 first, S1 senses that the virtual machine has migrated, relays the flow to S11, and simultaneously informs the switch where the source virtual machine is located that migration has occurred, and updates the six-tuple information in time.
The method comprises the following steps:
1. the virtual machine is on line, ip and mac are sent to the exchanger, and the exchanger packages six-tuple information and sends the six-tuple information to the controller.
2. Virtual machine migration is to send an arp to the switch, which informs the controller to update the six-tuple information.
3. Other virtual machines do not update the six-tuple information, the access traffic continues to the old switch, and the switch needs to relay the traffic to the trusted switch and notify the updated six-tuple information.
4. And establishing a tunnel through the VTEP ip in the six-tuple information, and carrying out traffic communication.
Those of ordinary skill in the art will appreciate that the elements and method steps of each example described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements and steps of each example have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in this application, it should be understood that the disclosed methods and systems may be implemented in other ways. For example, the above-described division of units is merely a logical function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. The units may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. A public cloud host migration arp table item updating method is characterized in that: the virtual machine online method and the virtual machine migration method are included;
the virtual machine online method comprises the following steps: sending ip and mac to a switch, packaging six-tuple information by the switch, and sending the six-tuple information to a controller;
the virtual machine migration method comprises the following steps: the virtual machine is migrated to other servers, the arp information is sent to the switch, the switch sends six-tuple information to the controller, the controller updates the six-tuple information, other virtual machines do not update the six-tuple information, the access flow can continue to the old switch, at the moment, the switch relays the flow to the new switch, the source virtual machine is informed that the target virtual machine is migrated, the switch where the source virtual machine is located is informed of updating the six-tuple information, a tunnel is established through the VTEP ip in the six-tuple information, and flow communication is carried out;
the six-tuple information comprises VTEP IP of the switch, virtual machine IP address, virtual machine mac, vlan of the virtual machine, vxlan, l2vni, virtual machine IP address is taken as a barrel TAG, virtual machine is on line, an arp packet is sent to the switch, the switch sends six-tuple information to the controller, the controller takes the IP address as a barrel mark to record the six-tuple, when the switch inquires the virtual machine mac, the IP address is taken as an index to match the vxlan and l2vni, after matching is successful, the mac address of the target virtual machine is returned, after the virtual machine is migrated, the six-tuple information of the virtual machine is updated, and the six-tuple information cached by the switch is updated.
2. An electronic device comprising a processor and a memory communicatively coupled to the processor for storing processor-executable instructions, characterized in that: the processor is configured to execute the public cloud host migration arp table entry updating method according to claim 1.
3. A server, characterized by: comprising at least one processor, and a memory communicatively coupled to the processor, the memory storing instructions executable by the at least one processor to cause the at least one processor to perform a public cloud host migration arp entry updating method according to claim 1.
4. A computer-readable storage medium storing a computer program, characterized in that: the computer program when executed by a processor realizes the method for updating the public cloud host migration arp table entry according to claim 1.
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| CN202210884417.3A CN115297055B (en) | 2022-07-25 | 2022-07-25 | Public cloud host migration arp table item updating method |
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| CN115297055B true CN115297055B (en) | 2024-01-23 |
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