CN105391797B - Cloud Server load-balancing method and device based on SDN - Google Patents
Cloud Server load-balancing method and device based on SDN Download PDFInfo
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- CN105391797B CN105391797B CN201510882642.3A CN201510882642A CN105391797B CN 105391797 B CN105391797 B CN 105391797B CN 201510882642 A CN201510882642 A CN 201510882642A CN 105391797 B CN105391797 B CN 105391797B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
Abstract
The present invention provides a kind of Cloud Server load-balancing method and device based on SDN, and wherein method includes: to obtain the status information of each server in cloud server cluster, and the status information of server includes the load of server；According to the load of each server, the load summation of cloud server cluster is determined；Judge whether the load summation of cloud server cluster is greater than the first preset threshold；If more than the first preset threshold, then new server is started according to the difference of load summation and the first preset threshold；If being not more than the first preset threshold, whether judge to load summation less than the second preset threshold；If closing part server according to the difference of load summation and the second preset threshold less than the second preset threshold.Cloud Server load-balancing method and device provided by the invention based on SDN, can be realized the dynamic load leveling of Cloud Server, and the processing speed of Cloud Server is slack-off when avoiding mass data access, improve the treatment effeciency of Cloud Server.
Description
Technical field
The present invention relates to computer technology more particularly to a kind of Cloud Server load-balancing methods and device based on SDN.
Background technique
SDN (Software Defined Network, software defined network) is a kind of implementation of network virtualization,
Its core technology OpenFlow is by separating network equipment control plane with data surface, to realize the spirit of network flow
Control living makes network become more intelligent as pipeline.
Physical machine is replaced to provide service as server for user using virtual machine based on the Cloud Server of SDN, it can be with
The elastic telescopic demand for meeting resource can effectively solve the problem that management difficulty existing for traditional physics rent machine is big, operation expanding
Weak defect.
But when there is mass data to access Cloud Server, the load excessive of Cloud Server leads to Cloud Server processing speed
Spend that slack-off, treatment effeciency is low.
Summary of the invention
The present invention provides a kind of Cloud Server load-balancing method and device based on SDN, to solve in the prior art
Processing speed slack-off technical problem when Cloud Server load excessive.
The present invention provides a kind of Cloud Server load-balancing method based on SDN, comprising:
The status information of each server in cloud server cluster is obtained, the status information of the server includes the service
The load of device；
According to the load of each server, the load summation of the cloud server cluster is determined；
Judge whether the load summation of the cloud server cluster is greater than the first preset threshold；If more than the first default threshold
Value then starts new server according to the difference of the load summation and first preset threshold；If being not more than the first default threshold
Whether value, then judge the load summation less than the second preset threshold；If total according to the load less than the second preset threshold
With and second preset threshold difference close part server.
Further, the method also includes:
The status information of interchanger is obtained, the status information of the interchanger includes the load of the interchanger；
Judge whether the load of the interchanger is greater than third predetermined threshold value；If more than third predetermined threshold value, then according to institute
The difference of the load and the third predetermined threshold value of stating interchanger starts new server；If being not more than third predetermined threshold value, sentence
Break the interchanger load whether less than the 4th preset threshold；If less than the 4th preset threshold, according to the interchanger
The difference of load and the 4th preset threshold closes part server.
Further, the status information of the interchanger further include: the interchanger is sent to the data of each server
Flow；
Correspondingly, after the status information for obtaining interchanger, further includes:
The flow of each server is sent to according to the processing capacity of each server and the interchanger, judgement is sent to each service
Whether the flow of device is balanced；
If unbalanced, the flow table of the interchanger is adjusted.
Further, the load of the interchanger is that the interchanger is sent to each server in the cloud server cluster
The sum of flow of data.
Further, the load of the server is the load of the memory and/or CPU of the server.
The present invention also provides a kind of Cloud Server load balancing apparatus based on SDN, comprising:
Module is obtained, for obtaining the status information of each server in cloud server cluster, the state letter of the server
Breath includes the load of the server；
Determining module determines the load summation of the cloud server cluster for the load according to each server；
Judgment module, for judging whether the load summation of the cloud server cluster is greater than the first preset threshold；If big
In the first preset threshold, then new server is started according to the difference of the load summation and first preset threshold；If less
In the first preset threshold, then judge the load summation whether less than the second preset threshold；If less than the second preset threshold, root
Part server is closed according to the difference of the load summation and second preset threshold.
Further, the judgment module is also used to:
The status information of interchanger is obtained, the status information of the interchanger includes the load of the interchanger；
Judge whether the load of the interchanger is greater than third predetermined threshold value；If more than third predetermined threshold value, then according to institute
The difference of the load and the third predetermined threshold value of stating interchanger starts new server；If being not more than third predetermined threshold value, sentence
Break the interchanger load whether less than the 4th preset threshold；If less than the 4th preset threshold, according to the interchanger
The difference of load and the 4th preset threshold closes part server.
Further, the status information of the interchanger further include: the interchanger is sent to the data of each server
Flow；
Correspondingly, the judgment module is also used to:
After the status information for obtaining interchanger, sent out according to the processing capacity of each server and the interchanger
Toward the flow of each server, whether the flow that judgement is sent to each server is balanced；
If unbalanced, the flow table of the interchanger is adjusted.
Cloud Server load-balancing method and device provided by the invention based on SDN, by obtaining cloud server cluster
In the status information of each server determine the load summation of the cloud server cluster according to the load of each server, judge institute
Whether the load summation for stating cloud server cluster is excessive or too small, and correspondingly starts new server or close partial service
Device can be realized the dynamic load leveling of Cloud Server, and the processing speed of Cloud Server is slack-off when avoiding mass data access,
The treatment effeciency of Cloud Server is improved, and part server can be closed when the load of Cloud Server is smaller, it is effectively save
Resource.
Detailed description of the invention
Fig. 1 is the flow chart for the Cloud Server load-balancing method based on SDN that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram of the Cloud Server load balancing apparatus provided by Embodiment 2 of the present invention based on SDN.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment one
The embodiment of the present invention one provides a kind of Cloud Server load-balancing method based on SDN.Load balancing refers to multiple
Server forms a server cluster in a symmetrical manner, and each server has status of equal value, can be individually right
Outer offer service and without the auxiliary of other servers.By load balancing technology, the request that outside is sent is evenly distributed
On a certain server into symmetrical structure, and the server for receiving request independently responds the request of client, can be averaged
Client's request is distributed to server array, so that user can solve largely concurrently to access server with data needed for quick obtaining
The problem of, this clustering technique can obtain the performance close to mainframe with least investment.
As the continuous development of cloud computing can be on-demand since retractility of the cloud computing to resource has done good processing
Resource required for distribution and purchase, avoids the wasting of resources, and more and more service arrangements are on Cloud Server, therefore, cloud clothes
Load balancing on business device is also a kind of hard requirement along with traditional services and next.
Traditional load balancing scheme has software load equilibrium and hardware load equilibrium two ways.Wherein, software load
Balanced advantage is based on specific environment, and configuration is simple, and using flexible is low in cost, can satisfy general load balancing demand.
But from performance for, the performance of software load equilibrium is poor, when encountering the access of a large amount of burst types, software processing
Inefficiencies readily become system bottleneck.Hardware load balancing solution is installed directly between server and external network
Load-balancing device, this equipment are normally referred to as load balancer, since special equipment completes special task, independently of
Operating system, overall performance are largely improved, in addition diversified load balancing, intelligentized traffic management is reachable
To optimal load balancing demand.Hardware load equilibrium is better than software mode in function, performance, but expensive, flexibly
Property is poor.
And with the development of OpenFlow technology, many manufacturers also produce OpenFlow interchanger.SDN is as a kind of new
The network virtualization technology of type, brings the flexibility of many network portions, and OpenVswitch also supports OpenFlow association
View provides effective support to virtual server access SDN network, so, the load balancing scheme based on SDN has than hard
The more powerful flexibility of part load balancer avoids expensive hardware spending.Meanwhile by means of the quick processing number of interchanger
According to the ability of packet, the inefficiencies of software load equalization scheme are also largely avoided.
Fig. 1 is the flow chart for the Cloud Server load-balancing method based on SDN that the embodiment of the present invention one provides.Such as Fig. 1
Shown, the Cloud Server load-balancing method based on SND in the present embodiment may include:
Step 101, the status information for obtaining each server in cloud server cluster, the status information of the server include
The load of the server.
Specifically, the executing subject of the method in the present embodiment can be SDN controller.The available cloud of SDN controller
The load of each server in server cluster, wherein the load of the server is the memory and/or CPU of the server
Load, it is described to load the real time load that can be server, the average load being also possible in a period of time.
Server in the present embodiment can be virtual server.
Step 102, according to the load of each server, determine the load summation of the cloud server cluster.
Specifically, the sum of load of whole servers in the cloud server cluster is the cloud server cluster
Load summation.
Step 103 judges whether the load summation of the cloud server cluster is greater than the first preset threshold；If more than first
Preset threshold then starts new server according to the difference of the load summation and first preset threshold；If being not more than first
Whether preset threshold then judges the load summation less than the second preset threshold；If less than the second preset threshold, according to
The difference for loading summation and second preset threshold closes part server.
If loading summation is greater than the first preset threshold, illustrate that the present load of Cloud Server is larger, at this point it is possible to according to institute
It states load summation and the difference of first preset threshold starts new server, specifically, if the load summation and described the
The difference of one preset threshold is larger, can star more new server, if the load summation and first preset threshold
Difference it is smaller, can star less new server.
It preferably, can be default according to the processing capacity of individual server and the load summation and described first
The difference of threshold value determines the number for needing new server to be started to integrate.
If loading summation is not more than the first preset threshold, illustrates that the present load of Cloud Server is little, may determine that at this time
Whether the load summation is less than the second preset threshold, if being less than, illustrates that the present load of Cloud Server is too small, at this point, can
To close part server according to the difference of the load summation and second preset threshold, specifically, if the load summation
It is larger with the absolute value of the difference of second preset threshold, more server can be closed, if the load summation with it is described
The absolute value of the difference of second preset threshold is smaller, can close less server.
It preferably, can be according to the processing capacity of individual server and the load summation and the described second default threshold
The difference of value determines the number for needing the server closed to integrate.
Wherein, first preset threshold and the second preset threshold can be arranged according to actual needs, specifically, can be with
According to the number of server, the processing speed of each server and user demand in cluster come synthetic setting.
In practical applications, when cloud server cluster starts, the number of server in the available cluster of SDN controller
And the processing capacity of each server, by the load balancing initial module of SDN controller come the balanced rule of design (calculated) load, and under
Flow table is sent out, client's request into SDN network is imported on different servers by matching different flow tables.It is transported in network
Between the departure date, the number of server can be adjusted in real time according to the method in the present embodiment, complete load-balancing function.
Cloud Server load-balancing method provided in this embodiment based on SDN, it is each in cloud server cluster by obtaining
The status information of server determines the load summation of the cloud server cluster, judges the cloud according to the load of each server
Whether the load summation of server cluster is excessive or too small, and correspondingly starts new server or close part server,
The dynamic load leveling that can be realized Cloud Server, the processing speed of Cloud Server is slack-off when avoiding mass data access, mentions
The high treatment effeciency of Cloud Server, and part server can be closed when the load of Cloud Server is smaller, effectively save money
Source.
Further, method provided by the above embodiment can also include:
The status information of interchanger is obtained, the status information of the interchanger includes the load of the interchanger；
Judge whether the load of the interchanger is greater than third predetermined threshold value；If more than third predetermined threshold value, then according to institute
The difference of the load and the third predetermined threshold value of stating interchanger starts new server；If being not more than third predetermined threshold value, sentence
Break the interchanger load whether less than the 4th preset threshold；If less than the 4th preset threshold, according to the interchanger
The difference of load and the 4th preset threshold closes part server.
Wherein, the interchanger can be OpenFlow interchanger or OpenSwitch interchanger, and the interchanger is born
Carry the sum of the flow of data that each server in the cloud server cluster is sent to for the interchanger.The flow, which can be, works as
Flow in period the last period, the period can be arranged according to actual needs.The third predetermined threshold value and the 4th is preset
Threshold value can be according to the property of the number of server, the processing capacity of server and Cloud Server in cloud server cluster come comprehensive
It closes and determines.
When the load excessive of interchanger, it can correspondingly start new server, the new server of required starting
Number can be determined according to the difference of the load of the interchanger and third predetermined threshold value, specifically, if the interchanger is negative
It carries and the difference of third predetermined threshold value is larger, then start more new server, it is on the contrary then start less new server；When
When the load of interchanger is too small, part server can be closed, the number of the server of required closing can be according to the exchange
The difference of the load of machine and the 4th preset threshold determines, specifically, if the difference of the load of the interchanger and the 4th preset threshold
Absolute value it is larger, then close more server, it is on the contrary then close less server.
In the present embodiment, Cloud Server is adjusted by the flow status of interchanger, when encountering resource bottleneck
When, it can automatically add server, when resource abundance, can automatically reduce server, also, be compared to biography
The Cloud Server load balancing scheme of system, being based especially on software such as LVS, (Linux Virtual Server, Linux is virtual
Server) load-balancing method realized, solve the problems, such as "bottleneck", it, can be from net especially when requesting excessive
The level of network forwarding accomplishes load balancing, avoids the low performance problem of software data processing.
On the basis of technical solution provided by the above embodiment, it is preferred that starting new server or close portion
After sub-server, can according in cloud server cluster server number and each server handling ability to the flow table of interchanger
It is adjusted.
Preferably, in the present embodiment, according in cloud server cluster server number and each server process energy
Power determines the flow table of interchanger, can specifically include:
According to server number and the processing capacity of each server, the throughput of cluster is determined；According to cluster
Throughput determines the number and the corresponding dummy node of each server of dummy node, and distributes for each dummy node
Source IP address, so that the number of the corresponding source IP address of each dummy node is equal (being also possible in some cases close),
In, the number of the dummy node of each server is directly proportional to the processing capacity of the server；Same server will be belonged to
The corresponding source IP address of dummy node merges, and the server is stored in stream with the corresponding relationship of source IP address after merging
In table, so that the data packet is sent to corresponding clothes after receiving data packet, according to the source IP address of data packet by interchanger
Business device processing.
For example, the processing capacity of server one is 3, server two there are two server one and server two in cluster
Processing capacity is 5, then the throughput of cluster is 8, therefore, 8 dummy nodes A, B, C, D, E, F, G, H can be set,
In, node A, B, C belong to server one, and node D, E, F, G, H belong to server two, and source IP address is average on 8 nodes
Distribution, it is assumed that shown in allocation result table 1.
Table 1
| The front three of source IP address | Dummy node |
| 000 | A |
| 001 | B |
| 010 | C |
| 011 | D |
| 100 | E |
| 101 | F |
| 110 | G |
| 111 | H |
According to table 1, the corresponding source IP address of the dummy node for belonging to same server is merged, final stream is obtained
Table, as shown in table 2.
Table 2
| The top N of source IP address | Server |
| 00 | Server one |
| 010 | Server one |
| 011 | Server two |
| 1 | Server two |
In this way, the source IP address of the data packet according to flow stream searching is corresponding after interchanger receives data packet
Server, and the data packet is sent to the server process.
In the present embodiment, the corresponding source IP address of dummy node by that will belong to same server merges, and will be described
Server is stored in flow table with the corresponding relationship of source IP address after merging, and can effectively reduce the flow table entry in interchanger
Number improves the performance of switch processes data packet.
On the basis of technical solution provided by the above embodiment, it is preferred that the status information of the interchanger is also wrapped
Include: the interchanger is sent to the flow of the data of each server.
Correspondingly, it is described obtain interchanger status information after, can also according to the processing capacity of each server with
And the interchanger is sent to the flow of each server, whether the flow that judgement is sent to each server is balanced；If unbalanced, to institute
The flow table for stating interchanger is adjusted.
For example, it is assumed that being provided with server A and server B in cloud server cluster, the processing capacity of server A is service
2 times of device B, if the flow that interchanger is sent to the data of server A is destined for 2 times of the flow of the data of server B or so,
The flow for thinking that the interchanger is sent to each server is balanced, if the flow that interchanger is sent to the data of server A is equal to
It is sent to the flow of the data of server B, or 2 times of the flow much larger than the data for being sent to server B, then it is assumed that the exchange
The flow that machine is sent to each server is unbalanced.
After the flow that judgement is sent to each server is unbalanced, the flow table of interchanger can be adjusted, be made
The flow equalization of each server must be sent to.Specifically, it if the flow for being sent to a certain server is excessive, will be serviced described in flow table
The corresponding part source IP address of device distributes to other servers, if the flow for being sent to a certain server is too small, by its in flow table
The corresponding part source IP address of its server distributes to the server.
Embodiment two
Second embodiment of the present invention provides a kind of Cloud Server load balancing apparatus based on SDN.Fig. 2 is the embodiment of the present invention
The structural schematic diagram of the two Cloud Server load balancing apparatus based on SDN provided.As shown in Fig. 2, in the present embodiment based on
The Cloud Server load balancing apparatus of SDN may include:
Module 201 is obtained, for obtaining the status information of each server in cloud server cluster, the state of the server
Information includes the load of the server；
Determining module 202 determines the load summation of the cloud server cluster for the load according to each server；
Judgment module 203, for judging whether the load summation of the cloud server cluster is greater than the first preset threshold；If
Greater than the first preset threshold, then new server is started according to the difference of the load summation and first preset threshold；If no
Greater than the first preset threshold, then judge the load summation whether less than the second preset threshold；If less than the second preset threshold,
Part server is closed according to the difference of the load summation and second preset threshold.
The Cloud Server load balancing apparatus based on SDN in the present embodiment, can be used for executing the base in embodiment one
In the Cloud Server load-balancing method of SDN, specific implementation is similar with embodiment one, and details are not described herein again.
Cloud Server load balancing apparatus provided in this embodiment based on SDN, it is each in cloud server cluster by obtaining
The status information of server determines the load summation of the cloud server cluster, judges the cloud according to the load of each server
Whether the load summation of server cluster is excessive or too small, and correspondingly starts new server or close part server,
The dynamic load leveling that can be realized Cloud Server, the processing speed of Cloud Server is slack-off when avoiding mass data access, mentions
The high treatment effeciency of Cloud Server, and part server can be closed when the load of Cloud Server is smaller, effectively save money
Source.
Further, the judgment module 203 is also used to:
The status information of interchanger is obtained, the status information of the interchanger includes the load of the interchanger；
Judge whether the load of the interchanger is greater than third predetermined threshold value；If more than third predetermined threshold value, then according to institute
The difference of the load and the third predetermined threshold value of stating interchanger starts new server；If being not more than third predetermined threshold value, sentence
Break the interchanger load whether less than the 4th preset threshold；If less than the 4th preset threshold, according to the interchanger
The difference of load and the 4th preset threshold closes part server.
Further, the status information of the interchanger further include: the interchanger is sent to the data of each server
Flow；
Correspondingly, the judgment module 203 is also used to:
After the status information for obtaining interchanger, sent out according to the processing capacity of each server and the interchanger
Toward the flow of each server, whether the flow that judgement is sent to each server is balanced；
If unbalanced, the flow table of the interchanger is adjusted.
Further, the load of the interchanger is that the interchanger is sent to each server in the cloud server cluster
The sum of flow of data.
Further, the load of the server is the load of the memory and/or CPU of the server.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of Cloud Server load-balancing method based on SDN characterized by comprising
The status information of each server in cloud server cluster is obtained, the status information of the server includes the server
Load；
According to the load of each server, the load summation of the cloud server cluster is determined；
Judge whether the load summation of the cloud server cluster is greater than the first preset threshold；If more than the first preset threshold, then
Start new server according to the difference of the load summation and first preset threshold；If being not more than the first preset threshold,
Judge the load summation whether less than the second preset threshold；If less than the second preset threshold, according to the load summation with
The difference of second preset threshold closes part server；The method also includes:
The status information of interchanger is obtained, the status information of the interchanger includes the load of the interchanger；
Judge whether the load of the interchanger is greater than third predetermined threshold value；If more than third predetermined threshold value, then according to the friendship
The difference of the load and the third predetermined threshold value changed planes starts new server；If being not more than third predetermined threshold value, institute is judged
The load of interchanger is stated whether less than the 4th preset threshold；If less than the 4th preset threshold, according to the load of the interchanger
And the difference of the 4th preset threshold closes part server.
2. the method according to claim 1, wherein the status information of the interchanger further include: the exchange
Machine is sent to the flow of the data of each server；
Correspondingly, after the status information for obtaining interchanger, further includes:
The flow of each server is sent to according to the processing capacity of each server and the interchanger, judgement is sent to each server
Whether flow is balanced；
If unbalanced, the flow table of the interchanger is adjusted.
3. the method according to claim 1, wherein the load of the interchanger is described in the interchanger is sent to
The sum of the flow of data of each server in cloud server cluster.
4. method according to claim 1-3, which is characterized in that the load of the server is the server
Memory and/or CPU load.
5. a kind of Cloud Server load balancing apparatus based on SDN characterized by comprising
Module is obtained, for obtaining the status information of each server in cloud server cluster, the status information packet of the server
Include the load of the server；
Determining module determines the load summation of the cloud server cluster for the load according to each server；
Judgment module, for judging whether the load summation of the cloud server cluster is greater than the first preset threshold；If more than
One preset threshold then starts new server according to the difference of the load summation and first preset threshold；If no more than the
Whether one preset threshold then judges the load summation less than the second preset threshold；If less than the second preset threshold, according to institute
The difference for stating load summation and second preset threshold closes part server；The judgment module is also used to:
The status information of interchanger is obtained, the status information of the interchanger includes the load of the interchanger；
Judge whether the load of the interchanger is greater than third predetermined threshold value；If more than third predetermined threshold value, then according to the friendship
The difference of the load and the third predetermined threshold value changed planes starts new server；If being not more than third predetermined threshold value, institute is judged
The load of interchanger is stated whether less than the 4th preset threshold；If less than the 4th preset threshold, according to the load of the interchanger
And the difference of the 4th preset threshold closes part server.
6. device according to claim 5, which is characterized in that the status information of the interchanger further include: the exchange
Machine is sent to the flow of the data of each server；
Correspondingly, the judgment module is also used to:
After the status information for obtaining interchanger, it is sent to respectively according to the processing capacity of each server and the interchanger
Whether the flow of server, the flow that judgement is sent to each server are balanced；
If unbalanced, the flow table of the interchanger is adjusted.
7. device according to claim 5, which is characterized in that the load of the interchanger is described in the interchanger is sent to
The sum of the flow of data of each server in cloud server cluster.
8. according to the described in any item devices of claim 5-7, which is characterized in that the load of the server is the server
Memory and/or CPU load.
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| CN106131222A (en) * | 2016-08-29 | 2016-11-16 | 桂林浩新科技服务有限公司 | A kind of server load balancing concocting method and system |
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