CN104734869A - Intelligent DNS domain name system and method based on dynamic detection - Google Patents
Intelligent DNS domain name system and method based on dynamic detection Download PDFInfo
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Abstract
The invention provides an intelligent DNS domain name system based on dynamic detection. The intelligent DNS domain name system is composed of an intelligent DNS and a detector. The intelligent DNS comprises a user input/output module, a local DNS statistics module, a communication module, a proximity rule module and a domain name resolution module. By means of the intelligent DNS domain name system and method based on dynamic detection, the system is easy to configure and maintain; a static proximity rule and dynamic detection can be combined to be used, the application range is wider, and the defects of a static method are made up for; meanwhile, the newest status of a network can be reflected in real time through dynamic detection, the optimal IP address is always parsed, and the operation efficiency of the network is improved.
Description
Technical field
The present invention relates to network application and pay control field, particularly a kind of intelligent DNS domain name system based on dynamic instrumentation and method.
Background technology
Intelligent DNS (Domain Name System computer domain name system), is usually used in the domain name mapping that domain name has multiple server (IP address).These IP addresses are usually used as CDN(Content DeliveryNetwork, content distributing network) Node distribution is in different regions or ISP (Internet ServerProvider, ISP), access that is trans-regional or different I SP may bring higher time delay.Therefore, by pre-configured close rule, when the local dns server request of user is to intelligent DNS server, intelligent DNS can identify region belonging to it or ISP, then return to identical with it or proximate region or ISP IP address, user finally obtains the fastest IP address of its access.
Such as, intelligent DNS resolves a kind of DNS solution that the problem for current telecommunications and Netcom's unsmooth interconnection is released, concrete methods of realizing is: the A of a domain name (Address points to IP address) record is arranged respectively and points to Netcom and telecommunications IP, when the client access of Netcom, intelligent DNS meeting automatic decision visitor incoming road, and return to the IP address of Netcom's server; Can the IP address of auto-returned telecommunications during the client access of telecommunications.Like this, the client of Netcom just can be avoided to remove to access the network of telecommunications, and the client of telecommunications remove the network of accessing Netcom, well solves the problem that client's outgoing access is not smooth.Certainly also many IP can be added, by intelligent DNS automatically " routing ".
In the prior art retrieved at present, intelligent DNS is static configuration, and it has following shortcoming: 1. close rule not easily configures, and user needs collection regional or ISP to comprise which network segment; 2. close rule is difficult to contain all addresses, and therefore outside rule, the access of address cannot obtain optimum parsing; 3., when external web environment changes, adjustment close rule is needed.
Summary of the invention
For overcoming Problems existing in prior art, an object of the present invention proposes a kind of intelligent DNS domain name system based on dynamic instrumentation, in order to the configure and maintenance of Intelligent Optimal DNS.
Another object of the present invention proposes a kind of intelligent DNS field name method based on dynamic instrumentation, and static close rule is combined with the close rule generated after dynamic instrumentation, and applicability is wider, makes up the deficiency of static method.
A kind of intelligent DNS domain name system based on dynamic instrumentation is made up of intelligent DNS and detector, and wherein said intelligent DNS comprises user's input/output module, local dns statistical module, communication module, close rule module and domain name mapping module.
Described user's input/output module: for receiving the input of user and display operation result;
Described local dns statistical module: for when receiving DNS query, collects the IP address of local dns, for system call;
Described communication module: for the communication between intelligent DNS and detector;
Further, described communication comprises two kinds, and a kind of is that the local dns address of collecting is sent to detector by intelligent DNS system; Another kind is that intelligent DNS system inquires about result of detection to detector;
Described close rule module: according to the result of detection of detector, choose the CDN node that local dns is the fastest, generates corresponding close rule;
Described domain name mapping module: for providing basic domain name mapping function;
Described detector, for receiving from described local dns address list, and detects these local dns, generates result of detection.
Based on an intelligent DNS field name method for dynamic instrumentation, comprise the following steps:
Step one, system configuration intelligent DNS functional module, particularly including the cycle, close rule module etc. of configuration local dns statistical module, described close rule module comprises configuring static close rule and dynamic instrumentation algorithm;
Further, described close rule configuration is support that the algorithm of two-way time generates;
Further, described close rule configuration is that the algorithm of packet loss generates;
Further, described close rule configuration is that jumping figure algorithm generates;
Further, described close rule configuration is that hybrid algorithm generates, and is each Distribution Indexes weight, and intelligent DNS, to each index weighted sum, then selects the minimum CDN node of weighted sum to generate close rule.
Step 2, disposes detector;
Step 3, according to the cycle of local dns statistical module, DNS query is collected on system cycle ground, corresponding IP address of collecting local dns, and described IP address cycle is issued detector and detected, detected by the IP address of this detector to described local dns, generate result of detection;
Step 4, intelligent DNS periodically obtains result of detection to detector, and according to result of detection, chooses the CDN node of local dns index optimum, generates the close rule of coupling;
Step 5, the close that coupling step 4 generates by the subsequent request of local dns is regular, and intelligent DNS is that it returns to optimum IP address.The intelligent DNS domain name analysis system of a kind of dynamic instrumentation provided by the invention and method, make system be easy to configure and maintenance; Static close rule can be combined with dynamic instrumentation, and applicability is wider, makes up the deficiency of static method; Simultaneously dynamic instrumentation can the latest Status of real time reaction network, resolves optimum IP address all the time, improves network operation efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of present system;
Fig. 2 is communication module workflow schematic diagram in present system;
Fig. 3 is a kind of embodiment workflow diagram of close rule module in present system;
Fig. 4 is the course of work schematic diagram that in present system, local dns request triggers dynamic instrumentation;
Fig. 5 is a kind of embodiment schematic diagram of present system.
Embodiment
In the following description, many ins and outs are proposed in order to make reader understand the application better.But persons of ordinary skill in the art may appreciate that even without these ins and outs with based on the many variations of following execution mode and amendment, is also each claim of the application technical scheme required for protection.
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
As shown in Figure 1, the intelligent DNS domain name system based on dynamic instrumentation is made up of intelligent DNS 100 and detector 200, and this system can be made up of server, such as ArrayNetworks APV6250.Wherein said intelligent DNS comprises user's input/output module 101, local dns statistical module 102, communication module 103, close rule module 104 and domain name mapping module 105.
Described user's input/output module: for receiving the input of user and display operation result.Configure all intelligent DNS functions at this, comprise IP address, address pool, address pool algorithm, domain name, domain name strategy, static close rule, dynamic instrumentation algorithm etc.; Also can check the running status, statistical information etc. of intelligent DNS simultaneously.
Described local dns statistical module: for when receiving DNS query, periodically collects the IP address of local dns, and these IP will be detected by periodically issuing detector.
Described communication module: communicate with between detector for intelligent DNS system.As shown in Figure 2, communication comprises two kinds, and a kind of is that the local dns address of collecting is sent to detector by intelligent DNS system; Another kind is that intelligent DNS system inquires about result of detection to detector, and result of detection transfers to close rule module to process further.These two kinds communications use TCP to connect transmission data, are all periodically run according to the user configured time interval.
Described close rule module: according to the result of detection of detector, choose the CDN node that local dns is the fastest, generates close rule.As Fig. 3 to demonstrate IP address be the local dns nslookup of 1.1.1.1 time, the workflow of close rule module.Wherein, close rule is an IP address table, defines which IP or which region the network segment belongs to, when receiving the inquiry request of certain local dns, if the close rule of not mating with it, so intelligent DNS is according to configuration, general by polling algorithm, return to IP address at random.Afterwards, statistical module collects this local dns address, sends to detector, and detector returns to intelligent DNS system after generating result to its detection, and system generates the close rule of coupling.The follow-up request of this local dns will mate close rule, and intelligent DNS just can return to the IP address of optimum for it.
The generation of dynamic instrumentation close rule according to the algorithms of different of system configuration, such as, can support two-way time, packet loss, jumping figure and hybrid algorithm.Front 3 kinds of algorithms generate close rule according to each choose targets the shortest, that packet loss is minimum or jumping figure is minimum CDN node two-way time.And when being configured with hybrid algorithm, needing for each Distribution Indexes weight, intelligent DNS, to each index weighted sum, then selects CDN node minimum in weighted sum result to generate close rule.Use hybrid algorithm can comprehensive each index create-rule.
Described domain name mapping module: for providing basic domain name mapping function, mainly provides and points to IP address to A record and AAAA(, meanwhile, points to IPv6 address).
Described detector: for receiving from described local dns address list, and detect these local dns, generates result of detection; Detector can be disposed at each CDN node place that is trans-regional or different I SP.As shown in Figure 4, for local dns request in intelligent DNS triggers the course of work schematic diagram of dynamic instrumentation, local dns sends DNS query request to intelligent DNS server first, and intelligent DNS is according to the rule of configuration, select the IP address of request domain name, return to local dns; The IP address of this local dns of intelligent DNS server record; The IP address of the local dns of record is sent to all detectors being deployed in CDN node by intelligent DNS server; Detector detects local dns, record result of detection.Detector detects local dns, can obtain detector to two-way time (RTT) of local dns, packet loss (PLR), jumping figure (Hops).Because detector is deployed in CDN node, the general and Internet user of local dns is in identical network, and therefore result of detection reflects the speed that user accesses CDN node.The result of detection of multiple detector to same local dns is compared, just can know which CDN node this local dns accesses the soonest, also just represent the CDN node to user's optimum.Detector both can use Array application delivery equipment, also can use independent application program.
Now lift an example, system and method for the present invention is described further.As shown in Figure 5, intelligent DNS system adopts unit type to be APV6250.Wherein, the domain name of the client input www.sdns.com of intelligent DNS, now has two IP addresses to belong to different ISP respectively: UNICOM (1.1.1.1) and telecommunications (2.2.2.2).The intelligent DNS now configured based on dynamic instrumentation carries out domain name mapping to www.sdns.com.The IP address of intelligent DNS system is 10.8.1.123, and gateway is 10.8.1.1.
First the IP address of configuration interface and default route.
ip address"port1"10.8.1.123255.255.255.0
ip route default10.8.1.1
ip nameserver10.8.1.10
Add two IP addresses of domain name, called after " svc_lt ", " svc_dx ".
sdns service ip"svc_lt"1.1.1.1
sdns service ip"svc_dx"2.2.2.2
Create 3 address pool.Be used for depositing the IP address needing to resolve.Wherein pool_lt is used for depositing the IP address of UNICOM, and pool_dx is used for depositing the IP address of telecommunications.And pool_default is default address pond, when passing through rule match UNICOM or pond, cable address, default address pond is selected, and therefore it comprises all 2 IP addresses.
sdns pool name“pool_lt”
sdns pool name“pool_dx”
sdns pool name"pool_default"
IP address is added address pool
sdns pool service"pool_lt""svc_lt"
sdns pool service"pool_dx""svc_dx"
sdns pool service"pool_default""svc_lt"
sdns pool service"pool_default""svc_dx"
Add the domain name " www.sdns.com " needing to resolve
sdns host name"www.sdns.com"
Then, for telecommunications and UNICOM two ISP create area-name: " reg_lt " represents UNICOM, and " reg_dx " represents telecommunications.
sdns region name"reg_lt"
sdns region name"reg_dx"
Add two regional strategies.Strategy " pol_lt " makes source address belong to UNICOM region (reg_lt), the IP address of access UNICOM address pool (pool_lt); Strategy " pol_dx " makes source address belong to telecommunications region (reg_dx), the IP address of access pond, cable address (pooL_dx).
sdns policy region"pol_lt""www.sdns.com""pool_lt""reg_lt"
sdns policy region"pol_dx""www.sdns.com""pool_dx""reg_dx"
Add default policy, the DNS request of matching area strategy will cannot hit default policy, and access the IP address in default address pond (pool_default).
sdns policy default"www.sdns.com""pool_default"
Open intelligent DNS, open statistical function.
sdns on
sdns statistics query on
sdns statistics localdns on
So far, intelligent DNS system can provide dns resolution function.But owing to not having close rule, all domain name request of accessing www.sdns.com will mate the IP under pond, default policy return address " pool_default ".Default address pond comprises 2 IP addresses of Zone Full, is returned by polling mode, therefore, cannot ensure that user obtains optimum IP address.
Enable dynamic instrumentation function below.
sdns dps master on
sdns dps on
The method arranging dynamic instrumentation generation close rule is two-way time (RTT).
sdns dps method rtt
Then detector is added.2.2.2.51 for being deployed in the IP address of the detector of telecommunication station, 1.1.1.10 is the IP address of the detector being deployed in UNICOM's website.44544 default ports connected for communication TCP.
sdns dps detector"reg_dx"2.2.2.5144544
sdns dps detector"reg_lt"1.1.1.1044544
Now, the function of dynamic instrumentation can work.Can by checking the running status of dynamic instrumentation to issue orders.Output shows, dynamic instrumentation is enabled, and the operating state of 2 detectors is all normal (UP).
AN(config)#show sdns dps status
SDNS DPS service is ON
SDNS DPS master service is ON
Detector Address(Port) Status
reg_dx 2.2.2.51 (44544) UP
reg_lt 1.1.1.10 (44544) UP
When equipment receives DNS query, and after running a period of time, just result of detection can be seen.Can see from output, IP address is that the local dns access reg_dx of 2.2.0.100 is faster, and IP address is that the local dns access reg_lt of 1.1.156.37 is faster.
AN(config)#show sdns dps path
LocalDNS: 2.2.0.100
Region RTT(ms) PLR(%) Hops
* reg_dx 20 0 7
reg_lt 100 0 12
LocalDNS: 1.1.156.37
Region RTT(ms) PLR(%) Hops
reg_dx 90 0 10
* reg_lt 10 0 5
Its final dynamically close rule generated is as follows:
AN(config)#show sdns proximity dynamic
sdns proximity 2.2.0.100 255.255.255.255 "reg_dx"
sdns proximity 1.1.156.37 255.255.255.255 "reg_lt
It should be noted that, the each unit mentioned in the present invention's each equipment execution mode is all logical block, physically, a logical block can be a physical location, also can be a part for a physical location, can also realize with the combination of multiple physical location, the Physical realization of these logical blocks itself is not most important, and the combination of the function that these logical blocks realize is only the key solving technical problem proposed by the invention.In addition, in order to outstanding innovative part of the present invention, the present invention does not introduce above-mentioned each equipment execution mode and the unit not too close with solving technical problem relation proposed by the invention, but this does not show to there is not the said equipment execution mode and other is about implementation unit.
Although by referring to some of the preferred embodiment of the invention, to invention has been diagram and describing, but those of ordinary skill in the art should be understood that and can do various change to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. the intelligent DNS domain name system based on dynamic instrumentation, be made up of intelligent DNS and detector, it is characterized in that described intelligent DNS comprises user's input/output module, local dns statistical module, communication module, close rule module and domain name mapping module.
2. a kind of intelligent DNS domain name system based on dynamic instrumentation according to claim 1, is characterized in that: described detector, for receiving from described local dns address list, and detects these local dns, generates result of detection.
3. a kind of intelligent DNS domain name system based on dynamic instrumentation according to claim 1, is characterized in that:
Described user's input/output module: for receiving the input of user and display operation result;
Described local dns statistical module: for when receiving DNS query, collects the IP address of local dns, for system call;
Described communication module: for the communication between intelligent DNS and detector;
Described close rule module: according to the result of detection of detector, choose the CDN node that local dns is the fastest, generates corresponding close rule;
Described domain name mapping module: for providing basic domain name mapping function.
4. a kind of intelligent DNS domain name system based on dynamic instrumentation according to claim 3, it is characterized in that: in communication module, described communication comprises two kinds, and a kind of is that the local dns address of collecting is sent to detector by intelligent DNS system; Another kind is that intelligent DNS system inquires about result of detection to detector.
5., based on an intelligent DNS field name method for dynamic instrumentation, comprise the following steps:
Step one, system configuration intelligent DNS functional module, particularly including the cycle, close rule module etc. of configuration local dns statistical module, described close rule module comprises configuring static close rule and dynamic instrumentation algorithm;
Step 2, disposes detector;
Step 3, according to the cycle of local dns statistical module, DNS query is collected on system cycle ground, corresponding IP address of collecting local dns, and described IP address cycle is issued detector and detected, detected by the IP address of this detector to described local dns, generate result of detection;
Step 4, intelligent DNS periodically obtains result of detection to detector, and according to result of detection, chooses the CDN node of local dns index optimum, generates the close rule of coupling;
Step 5, the close that coupling step 4 generates by the subsequent request of local dns is regular, and intelligent DNS is that it returns to optimum IP address.
6. a kind of intelligent DNS field name method based on dynamic instrumentation according to claim 5, is characterized in that, described close rule configuration is support that the algorithm of two-way time generates.
7. a kind of intelligent DNS field name method based on dynamic instrumentation according to claim 5, is characterized in that, described close rule configuration is that the algorithm of packet loss generates.
8. a kind of intelligent DNS field name method based on dynamic instrumentation according to claim 5, is characterized in that, described close rule configuration is that jumping figure algorithm generates.
9. a kind of intelligent DNS field name method based on dynamic instrumentation according to claim 5, is characterized in that, described close rule configuration is that hybrid algorithm generates.
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