CN109547585A - A method of based on being switched fast for edge calculations cloud - Google Patents
A method of based on being switched fast for edge calculations cloud Download PDFInfo
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- CN109547585A CN109547585A CN201910031852.XA CN201910031852A CN109547585A CN 109547585 A CN109547585 A CN 109547585A CN 201910031852 A CN201910031852 A CN 201910031852A CN 109547585 A CN109547585 A CN 109547585A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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Abstract
The present invention relates to a kind of methods being switched fast based on edge calculations cloud, this method increases DNS cache refresh function by Local DNS, the refresh requests of domain name updating system can be received, and newest dns resolution is obtained by authorized DNS server and updates local cache.The present invention can be when authorizing DNS to update, the local cache of real-time update Local DNS avoids cloud business service IP from changing, when authorization DNS has been changed, the case where user still obtains original failure or cannot provide the IP of business, cloud business is caused not access normally.
Description
Technical field
The present invention relates to CDN and mobile edge calculations field more particularly to a kind of being switched fast based on edge calculations cloud
Method.
Background technique
DNS (Doma inNameSys tem, domain name system), one mutually mapped on internet as domain name and IP address
A distributed data base is able to use family and more easily accesses internet, remembers can be directly read by machine without spending
IP number string.Dns server is divided into two kinds, first is that local dns (i.e. LocalDNS, the DNS service of the configurations such as user computer, mobile phone
Device), its proxy user goes to internet to obtain the IP address that user accesses domain name；Second is that authorization DNS or authority DNS, it possesses domain
The corresponding IP address of name, by the website of domain name ownership, the domain name mapping IP of cloud service provider's configuration modification authorization DNS.
It can be cached as LocalDNS-from the authorization DNS domain name mapping obtained as a result, having user's request identical within caching effective time
The IP of local cache is directly returned when the parsing of domain name.Only cache it is expired, LocalDNS can just go authorization DNS reacquire
Parsing result.Process such as Fig. 1.
Authorization DNS can be carried expired time (TTL) when returning to LocalDNS parsing result, this expired time by website or
Cloud business provides setting, some suppliers can be arranged TTL to allow LocalDNS to update as early as possible when modifying business IP
It is shorter, but this also allows LocalDNS frequently to send domain name inquiry request.Therefore some LocalDNS are to improve performance, do not use and award
Weigh the TTL time of DNS, meeting
Fixed cache-time is configured, sometimes up to a few hours even one day.LocalDNS configures the longer TTL time, when
When cloud service supplier modifies domain name configuration, will cause website or cloud service before cache-time expires can not be accessed.Such as: cloud
When business IP is changed or when one service point of cloud business breaks down and (has multiple nodes while providing service), Yun Ye
Business supplier can modify its domain name mapping configuration for authorizing DNS quickly, but LocalDNS is by the control of cloud service supplier,
Cache the expired preceding IP or malfunctioning node for still returning to original stopping service.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of being switched fast based on edge calculations cloud is provided
Method solves cloud business service IP and changes, and when authorization DNS has been changed, avoids the DNS cache in LocalDNS server
Before information failure, user still obtains original failure or cannot provide the IP of business, the feelings for causing cloud business not access normally
Condition.
Realizing the technical solution of above-mentioned purpose is:
The present invention provides a kind of methods being switched fast based on edge calculations cloud, comprising the following steps:
S1, newly-increased DNS message format, and domain name is submitted to LocalDNS server by the newly-increased DNS message format
Refresh requests；
S2, newly-built domain name updating system, the domain name refreshing that domain name updating system is used to receive cloud service supplier are asked
It asks, setting domain name updating system sends domain name refresh requests to various regions LocalDNS；
When S3, LocalDNS receive domain name refresh requests, no matter whether local have caching, obtained most to authorization DNS
New domain name parsing.
Preferably, in step S1 of the present invention, newly-increased DNS message format includes:
DNS message header Opcode field is defined by RFC1035, increases a type of query message newly.
Preferably, in the present invention, it sets and the Opcode field of DNS message header is defined as 3-15 word by RFC1035
Section.
Preferably, in step S3 of the present invention, setting LocalDNS supports newly-increased domain name refresh requests.
Preferably, in step S3 of the present invention, setting does not support the LocalDNS of newly-increased domain name refresh requests that will receive
Newly-increased domain name refresh requests abandon.
The beneficial effects of the present invention are:
(1) when cloud business migration IP changes, it mostly can provide cloud service deployment to service simultaneously, break down
When, service switching to other nodes can be avoided the occurrence of the case where user's cloud business can not access；
(2) DNS cache in LocalDNS server can be refreshed in time, IP is changed or node switch operating is fast
Speed is completed, and ensure that user website or cloud business access are unaffected in node failure or IP change.
Detailed description of the invention
Fig. 1 is the Analytic principle figure of DNS of the present invention；
Fig. 2 is system construction drawing of the invention；
Fig. 3 is domain name refresh flow figure of the present invention；
Fig. 4 is domain name refreshing information format chart of the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
The present invention provides a kind of method being switched fast based on edge calculations cloud, and this method is increased by LocalDNS
DNS cache refresh function can receive the refresh requests of domain name updating system, and obtain newest DNS by authorized DNS server
Local cache is parsed and updates, therefore, can be when authorizing DNS to update, the local cache of real-time update LocalDNS avoids Yun Ye
Business service IP is changed, and when authorization DNS has been changed, user still obtains original failure or cannot provide the IP of business, causes
The case where cloud business can not be accessed normally.
The method being switched fast based on edge calculations cloud is further described below in conjunction with attached drawing.
A method of it based on being switched fast for edge calculations cloud, please refers to shown in attached drawing 2 and attached drawing 3, including following step
It is rapid:
S1, newly-increased DNS message format, and domain name is submitted to LocalDNS server by the newly-increased DNS message format
Refresh requests；
S2, newly-built domain name updating system, the domain name refreshing that domain name updating system is used to receive cloud service supplier are asked
It asks, setting domain name updating system sends domain name refresh requests to various regions LocalDNS；
When S3, LocalDNS receive domain name refresh requests, no matter whether local have caching, obtained most to authorization DNS
New domain name parsing.
In step sl, it please refers to shown in attached drawing 4, increasing DNS message format newly includes: to define DNS message by RFC1035
Head Opcode field increases a type of query message newly, and the Opcode field that RFC1035 defines DNS message header is 3-15 word
Section.
In step s3, setting LocalDNS supports newly-increased domain name refresh requests, when LocalDNS does not support newly-increased domain
When name refresh requests, LocalDNS directly abandons the newly-increased domain name refresh requests received, will not influence original in this way
The business processing of LocalDNS.
It should be noted that when cloud business service IP is changed, when authorization DNS has been changed, to avoid in LocalDNS
Before DNS cache information failure in server, user still obtains original failure or cannot provide the IP of business, causes cloud business
The case where can not normally accessing, the present invention is by increasing the format of DNS message, so that it is able to achieve DNS cache refresh function, when
When LocalDNS receives DNS message, can identify the part for increasing DNS message, to carry out domain name refreshing, no matter it is local whether
There is caching, all will acquire newest domain name mapping, avoids classical authorization DNS in this way and be more transformed into the feelings that user can not access
Condition.
It should be further noted that the LocalDNS that user's online at present is all provided using operator substantially, and this hair
The bright Local DNS is supported to receive the domain name refresh requests of cloud service supplier, be refreshed to the specified needs of intelligent DNS parsing
It supports domain name refresh message format, and sends domain name refresh requests to the LocalDNS of various regions using the message format in region.
It please refers to shown in attached drawing 2 and attached drawing 3, when IP changes when cloud business migration, cloud business can be same with the more ground of deployment
When service is provided, when the common nodes break down of the cloud business, service switching to fringe node makes it possible to refresh in time
DNS cache in LocalDNS server enables IP to change or node switch operating is done quickly, and ensure that in node event
User website or cloud business access are unaffected when barrier or IP are changed.Meanwhile operator can mention to internet manufacturer or cloud business
Donor hires out LocalDNS domain name refreshing service, increases Operator Specific Service income, can also be to rental telecom operators' cloud resource pond
Client provide domain name refresh value-added service, increase client's viscosity.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper
It states and bright many variations example is made to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, this
Invention will be using the range that the appended claims define as protection scope of the present invention.
Claims (5)
1. a kind of method being switched fast based on edge calculations cloud, which comprises the following steps:
S1, newly-increased DNS message format, and submit domain name to refresh to LocalDNS server by the newly-increased DNS message format
Request；
S2, newly-built domain name updating system, domain name updating system are used to receive the domain name refresh requests of cloud service supplier, if
Localization name updating system sends domain name refresh requests to various regions LocalDNS；
When S3, LocalDNS receive domain name refresh requests, no matter whether local have caching, most neofield is obtained to authorization DNS
Name parsing.
2. a kind of method being switched fast based on edge calculations cloud according to claim 1, which is characterized in that in step S1
In, newly-increased DNS message format includes:
DNS message header Opcode field is defined by RFC1035, increases a type of query message newly.
3. a kind of method being switched fast based on edge calculations cloud according to claim 2, which is characterized in that setting passes through
The Opcode field that RFC1035 defines DNS message header is 3-15 byte.
4. a kind of method being switched fast based on edge calculations cloud according to claim 1, which is characterized in that in step S3
In, setting LocalDNS supports newly-increased domain name refresh requests.
5. according to claim 1 or a kind of 4 methods being switched fast based on edge calculations cloud, which is characterized in that in step
In rapid S3, setting does not support the LocalDNS of newly-increased domain name refresh requests to abandon the newly-increased domain name refresh requests received.
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| CN201910031852.XA CN109547585A (en) | 2019-01-14 | 2019-01-14 | A method of based on being switched fast for edge calculations cloud |
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| CN201910031852.XA CN109547585A (en) | 2019-01-14 | 2019-01-14 | A method of based on being switched fast for edge calculations cloud |
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Cited By (6)
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| CN111836319A (en) * | 2019-08-23 | 2020-10-27 | 维沃移动通信有限公司 | Method and device for acquiring domain name address |
| CN112216085A (en) * | 2020-09-15 | 2021-01-12 | 青岛科技大学 | Equipment key load-bearing structural member health monitoring system based on edge calculation and intelligent identification of updated samples |
| CN114124888A (en) * | 2020-08-25 | 2022-03-01 | 中国移动通信有限公司研究院 | Domain name resolution method and device |
| CN114338604A (en) * | 2021-12-31 | 2022-04-12 | 北京奇艺世纪科技有限公司 | DNS configuration updating method and system |
| CN114422355A (en) * | 2022-01-10 | 2022-04-29 | 成都易达数安科技有限公司 | Method for APP to automatically adapt to two-path broadband special line |
| WO2022121902A1 (en) * | 2020-12-09 | 2022-06-16 | 维沃移动通信有限公司 | Edge application server migration and dns cache flushing or clearing method and apparatus |
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Application publication date: 20190329 |
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