CN113542051B - Monitoring flow load balancing method based on software defined network - Google Patents
Monitoring flow load balancing method based on software defined network Download PDFInfo
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- CN113542051B CN113542051B CN202110582477.5A CN202110582477A CN113542051B CN 113542051 B CN113542051 B CN 113542051B CN 202110582477 A CN202110582477 A CN 202110582477A CN 113542051 B CN113542051 B CN 113542051B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/12—Network monitoring probes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
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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
- H04L45/7453—Address table lookup; Address filtering using hashing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
The invention provides a monitoring flow load balancing method based on a software defined network, which comprises the following steps: monitoring a link between an acquisition probe vTAP and a physical TAP; acquiring load balance between a probe vTAP and a physical TAP; collecting the flow homodromous and homodromous forwarding step between a probe vTAP and a physical TAP; flow load balance is realized, and under the condition that a link is normal, the flow load balance between the acquisition probe vTAP and the physical equipment TAP is realized; the same source and the same destination are realized, that is, the flow sent by the same host machine reaches the same analysis equipment, and the packet loss caused by the incompleteness of the data packet is avoided; and when the link is broken, the flow is automatically switched to the normal link to be forwarded. Has extremely strong flexibility and convenience.
Description
Technical Field
The invention relates to the technical field of networks, in particular to a monitoring flow load balancing method based on a software defined network.
Background
Under the traditional network architecture, the occupation of the ports of the switch and the third-party equipment is easily caused by the flow analysis; the flow cannot be subjected to pre-processing, such as convergence, de-duplication, filtration, duplication and the like; and the third party device generally cannot identify some messages with VLANs, and the flow splitter TAP is generated at this time. The TAP device may converge traffic mirrored from one or more production network devices and distribute the converged traffic to one or more data analysis devices. However, with the development of network services, the traffic of the data center is changed from 80% of the northeast traffic to 80% of the eastern traffic, and the traditional TAP device cannot collect the eastern and western traffic generated by a large number of virtual machines, so that vTAP arises at the right of way. The vTAP is a virtual TAP created in a cloud environment, the flow of all virtual machines is guided to the vTAP on a cloud server in a port mirror image mode, then the flow is forwarded out on the vTAP in a tunnel mode and forwarded to a port of a physical TAP, and then the physical TAP is forwarded to an analysis device for analysis.
With the gradual expansion of the network scale, the east-west flow of the data center is increased, and the flow acquired by the acquisition probe vTAP is also increased and huge by forwarding the flow to the physical TAP through the tunnel. When the throughput of the device port is exceeded, packet loss is easily caused, so that the source flow of the analysis device is incomplete, and the original information is lost. In addition, the virtual TAP can be used as much as possible under the condition that the physical resources of the device are enough, and the physical TAP device cannot be purchased in large quantity due to the cost problem, so that the pressure on the analysis device is also caused.
Disclosure of Invention
In view of the above, an object of the first aspect of the present invention is to provide a monitoring traffic load balancing method based on a software defined network. Can overcome the defects in the prior art.
The purpose of the first aspect of the invention is realized by the following technical scheme:
a monitoring flow load balancing method based on a software defined network comprises the following steps:
step S1: monitoring link between acquisition probe vTAP and physical TAP
Constructing a data packet for transmission between the acquisition probe vTAP and the physical TAP, wherein the data packet is transmitted based on a tunnel between the acquisition probe vTAP and the physical TAP;
the acquisition probe vTAP sends a plurality of data packets to the physical TAP, and the network state of the current tunnel is calculated and obtained according to the received data packets;
step S2: load balancing step between acquisition probe vTAP and physical TAP
Synthesizing the obtained network state, and performing weight distribution on each physical TAP; according to the weight proportion of each physical TAP, forwarding the flow of the acquisition probe vTAP to a plurality of physical TAPs to realize shunting;
step S3: flow homologous and homoclinic forwarding step between acquisition probe vTAP and physical TAP
Data traffic sent from segments of the same acquisition probe vTAP is forwarded to the same physical TAP.
Further, the data packet has a status bit and an IP address bit; filling the IP address bit into the IP address of the physical TAP to be communicated at the vTAP end of the acquisition probe, and then sending; when the physical TAP receives the data packet, the state bit is modified immediately, and an acquisition probe vTAP is filled in the IP address bit for loopback.
Further, the acquisition probe vTAP calculates the packet receiving rate according to the number of the transmitted and received data packets, and calculates the delay of the link according to the time for transmitting and receiving the data packets.
Further, the acquisition probe vTAP sends a data packet at fixed time intervals, so as to acquire a network state in the time intervals.
Further, the product of the packet receiving rate and the delay is used as the weight of the corresponding physical TAP.
Further, hash algorithm operation is carried out on quintuple information of the data traffic sent by the segments, and the data traffic of the operation result is output to the same physical TAP, so that homologous homologies and homologies are realized.
It is an object of a second aspect of the invention to provide a computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method as described above when executing the computer program.
It is an object of a third aspect of the invention to provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method as previously described.
The invention has the beneficial effects that: the method realizes the load balance of the flow on an Openvswitch + DPDK (ovs + DPDK for short) based platform, and realizes the load balance of the flow between a vTAP (acquisition probe) and a TAP (physical equipment) under the condition that a link is normal; the same source and the same destination are realized, that is, the flow sent by the same host machine reaches the same analysis equipment, and the packet loss caused by the incompleteness of the data packet is avoided; and when the link is broken, the flow is automatically switched to the normal link for forwarding. Has extremely strong flexibility and convenience.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
fig. 1 is a network topology diagram of the present invention.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
The core functions of the technology of the invention are monitoring the link between the acquisition probe and the physical TAP, balancing the load between the acquisition probe and the physical TAP, and the homologous and homoclinic forwarding of the flow between the acquisition probe and the physical TAP.
For monitoring a link between an acquisition probe vTAP and a physical TAP, the acquisition probe vTAP is connected with a certain port of the physical TAP in a tunnel manner, and when the tunnel is blocked or disconnected due to an abnormal condition, the throughput between the acquisition probe and the physical TAP is low, and even communication cannot be performed; the link monitoring can check the link state in real time to be used as the basis of load balancing later.
For load balance between the acquisition probe vTAP and the physical TAP, when data in the data center is too large, pressure is applied to the physical TAP port, and a phenomenon of serious packet loss is likely to occur due to too large data volume. In this case, several physical TAP devices can be deployed according to their own network states under the condition of cost allowance, so as to share the problem of data pressure.
For the same source and sink of the traffic between the physical TAPs, when a certain data packet is too large, the network will segment and send the data packet, and finally merge the data packet into the same data packet. Under the condition of load balancing, data packets of different segments may be sent to different physical TAPs, so that the physical TAPs distributed to the traffic packets receive incomplete traffic packets and are judged to be wrong packets and discarded, and homologous homologies and homologies handle the problem, and the data packets sent from the same source (acquisition probe vTAP) are sent to the same destination (physical TAP), so that the phenomenon of packet loss caused by wrong packets is avoided.
Based on the above concept, the invention discloses a monitoring flow load balancing method based on a software defined network, and fig. 1 is a network topology diagram of the invention, the method comprises the following steps:
step S1, link monitoring step between acquisition probe vTAP and physical TAP
Constructing a data packet for transmission to and from the acquisition probe vTAP and the physical TAP, wherein the data packet is transmitted based on a tunnel between the acquisition probe vTAP and the physical TAP; the acquisition probe vTAP sends a plurality of data packets to the physical TAP, and the network state of the current tunnel is calculated and obtained according to the received data packets;
specifically, the data packet has a status bit and an IP address bit; filling the IP address bit into the IP address of the physical TAP to be communicated at the vTAP end of the acquisition probe, and then sending; when the physical TAP receives the data packet, the state bit is modified immediately, and an acquisition probe vTAP is filled in the IP address bit for loopback. On the Openvswitch, although the current traffic condition of the specified network card can be queried through the "ovs-offstl dump-ports" command, the Openvswitch does not support querying the traffic condition on the tunnel. Therefore, the method of self-sending and self-packet return can be adopted to obtain the network state between each link.
Further, the acquisition probe vTAP calculates the packet receiving rate according to the number of the transmitted and received data packets, and calculates the delay of the link according to the time for transmitting and receiving the data packets. And the acquisition probe vTAP sends a data packet in a fixed time period at regular time so as to acquire the network state in the time period.
Step S2, load balancing step between acquisition probe vTAP and physical TAP
Synthesizing the obtained network state, and performing weight distribution on each physical TAP; according to the weight ratio of each physical TAP, the flow of the acquisition probe vTAP is forwarded to a plurality of physical TAPs to realize shunting, so that the utilization rate of multiple links is improved, and the flow transmission pressure of a single physical TAP is reduced;
specifically, the product of the packet receiving rate and the delay is used as the weight of the corresponding physical TAP. For example, for the same acquisition probe vTAP to be sent to 3 physical TAPs, the packet receiving rates are 100%, 90% and 85%, the delays are 1ms and 1.03ms, respectively, and the weights allocated by the three physical TAPs are: (100%. 1): 90%. 1.03): 85%. 1.3).
Step S3, collecting the flow homologus and homologus forwarding step between probe vTAP and physical TAP
Data traffic sent from segments of the same acquisition probe vTAP is forwarded to the same physical TAP.
Specifically, the quintuple information of the data traffic sent by the segment is subjected to hash algorithm operation, and the data traffic of the operation result is output to the same physical TAP, so that homologous homologization and homologization are realized.
The homologous co-hosting is implemented based on a hash algorithm by mapping the key value into a hash table. The key value in the hash algorithm of the same source and sink is quintuple information of each flow, the hash algorithm results obtained by the same quintuple information are the same, the uplink flow and the downlink flow of one flow are marked, the obtained hash values are the same, and when the flows are summarized and output, the same flows of the hash values can be output through the same port, so that the same source and sink can be realized. For example, there are N output ports in the acquisition probe vTAP, a hash value is calculated as a by a hash algorithm in a session, mod (a, N) is performed by a modulo operation on N to obtain a value a, and then the session outputs the a-th output from the N ports of the physical TAP
It should be recognized that embodiments of the present invention can be realized and implemented in computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, the operations of processes described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described herein (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable connection, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, or the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described herein includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (7)
1. A monitoring flow load balancing method based on a software defined network is characterized in that: the method comprises the following steps:
step S1: monitoring link between acquisition probe vTAP and physical TAP
Constructing a data packet for transmission between the acquisition probe vTAP and the physical TAP, wherein the data packet is transmitted based on a tunnel between the acquisition probe vTAP and the physical TAP; the data packet has a status bit and an IP address bit; filling an IP address bit into an IP address of a physical TAP to be communicated at a vTAP end of the acquisition probe, and then sending; after the physical TAP receives the data packet, immediately modifying the state bit, filling an acquisition probe vTAP in the IP address bit, and returning;
the acquisition probe vTAP sends a plurality of data packets to the physical TAP, and the network state of the current tunnel is calculated and obtained according to the received data packets;
step S2: load balancing step between acquisition probe vTAP and physical TAP
Synthesizing the obtained network state, and performing weight distribution on each physical TAP; according to the weight proportion of each physical TAP, forwarding the flow of the acquisition probe vTAP to a plurality of physical TAPs to realize shunting;
step S3: flow homologous and homoclinic forwarding step between acquisition probe vTAP and physical TAP
Data traffic sent from segments of the same acquisition probe vTAP is forwarded to the same physical TAP.
2. The monitoring traffic load balancing method based on the software defined network as claimed in claim 1, wherein: the acquisition probe vTAP calculates the packet receiving rate according to the number of the transmitted and received data packets, and calculates the delay of the link according to the time for transmitting and receiving the data packets.
3. The monitoring traffic load balancing method based on the software defined network as claimed in claim 2, wherein: and the acquisition probe vTAP sends a data packet in a fixed time period at regular time so as to acquire the network state in the time period.
4. The monitoring traffic load balancing method based on the software defined network as claimed in claim 3, wherein: the product of the packet receiving rate and the delay is used as the weight of the corresponding physical TAP.
5. The monitoring traffic load balancing method based on the software defined network according to claim 1, characterized in that: and carrying out hash algorithm operation on quintuple information of the data traffic sent by the segments, and outputting the data traffic of the operation result to the same physical TAP to realize homologous homologization and homologization.
6. A computer comprising a memory, a processor, and a computer program stored on the memory and capable of running on the processor, wherein: the processor, when executing the computer program, implements the method of any of claims 1-5.
7. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the method of any one of claims 1-5.
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| CN114257472B (en) * | 2021-12-07 | 2023-05-05 | 中信银行股份有限公司 | Network topology monitoring method, device, equipment and readable storage medium |
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