CN109286525A - It is a kind of based on MQTT communication and it is active and standby between heartbeat two unit standby method - Google Patents
It is a kind of based on MQTT communication and it is active and standby between heartbeat two unit standby method Download PDFInfo
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- CN109286525A CN109286525A CN201811135172.4A CN201811135172A CN109286525A CN 109286525 A CN109286525 A CN 109286525A CN 201811135172 A CN201811135172 A CN 201811135172A CN 109286525 A CN109286525 A CN 109286525A
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- node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
-
- 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
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
-
- 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
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Hardware Redundancy (AREA)
- Debugging And Monitoring (AREA)
Abstract
It is a kind of based on MQTT communication and it is active and standby between heartbeat two unit standby method, the present invention is in order to overcome in dual-host backup scene, rely only on host (host node A, active) and standby host is (from node B, standby heartbeat mechanism erroneous judgement Host Status between) and there is fissure (Split-brain) phenomenon, and the shortcomings that cannot quickly positioning node failure itself or channel connecting fault when breaking down.News release/subscribing mechanism of MQTT and testament mechanism are applied to two-shipper mutually for scene, heartbeat mechanism merges use between AB.The present invention monitors A, B mutually by publish/subscribe status monitoring messages and testament message.The resource and service of node B hosting node A immediately when node A exception overcomes heartbeat mechanism erroneous judgement Host Status between relying only on AB and the shortcomings that fissure phenomenon occurs.By the way that news release/subscribing mechanism of MQTT and testament mechanism are merged use with heartbeat mechanism between AB, quickly being positioned according to heartbeat message, the supervisory messages of MQTTD and testament message between AB is node failure or channel failure.
Description
Technical field
The invention belongs to MQTT involved in computer application communication and it is active and standby between heartbeat two unit standby method.
Technical background
Dual-host backup mechanism is a kind of implementation most basic in high-availability cluster, for construct have high reliability and
The service system of high availability.In the prior art, the communication between the node in dual-host backup mechanism is by heartbeat come real
Existing.Heartbeat inspecting can be carried out by network link and serial ports, send message mutually to tell other side that oneself is worked as between them
Preceding state, it is judged that other side is failed, at this moment needs to start if not receiving the message of other side's transmission at the appointed time
Resource take-over module takes over the resource or service that operate on peer.There are the following problems for active and standby heartbeat mechanism: when
AB heartbeat break down and node A it is normal when, standby host node B thinks that host node A breaks down, the resource of hosting node A
And service.And actual conditions are that node A does not break down, at this moment node B wants the resource and service of hosting node A, and saves
Point A is still occupying resource and offer service, causes fissure (Split-brain) phenomenon.Split-brain can cause to service different
Often, operation is chaotic and data are imperfect.
Message queue telemetering transmits MQTT (Message Queuing Telemetry Transport) agreement and uses TCP/
IP provides network connection, using publish/subscribe massage pattern, provides one-to-many news release, releases application program coupling；It adopts
Abnormal broken line is handled with testament mechanism.Testament message (Will Message) is pre-defined by client and is stored in service
End is gone in server proactive dissemination Will Message message to Will Topic theme when client disconnects extremely, is notified
Will Topic correlation subscriber, the client are exited because abnormal.
Summary of the invention
It is proposed a kind of based on MQTT communication the purpose of the present invention is to overcome the problems of the above-mentioned prior art
And it is active and standby between heartbeat two unit standby method.
The purpose of the present invention is by following technical solution to realize:
It is a kind of based on MQTT communication and it is active and standby between heartbeat two unit standby method, feature of present invention is, by MQTT client
A, B node dual-host backup are held, wherein A is host equipment, B is mutually to back up to machine equipment, such as 1A, 1B, and 2A, 2B are mutually standby
Part, 2A, 3B are mutually backed up, and so on；There is AB heartbeat between A node and B node, keeps heartbeat connection.Mutually monitoring；
A node is main equipment, normal to provide defined service resources and function services.B node is to save from equipment as A
The guest machine of point, is normally in standby, the adapter tube resource when A node cannot provide defined service resources and function services
And service；
A node is main equipment, normal to provide defined service resources and function services；The normal condition timing of A node is issued
The related news Node A condition of status monitoring theme Node A condition monitoring Topic
Monitoring Message, and configured testament theme Node A Will Topic and testament message Node A Will
Message；B node subscribes to A node state monitoring theme Node A condition monitoring Topic and testament theme
Node A Will Topic receives status monitoring messages Node A condition when A node operates normally
Testament message Node A Will Message when monitoring Message and exception；B node passes through status monitoring messages
With testament message, the working condition of A node and the connectivity of A channel are monitored；
B node is normally to be in standby from equipment as the guest machine of A node, cannot provide regulation in A node
Service resources and function services when adapter tube resource and service；B node normal condition timing issued state monitors theme Node B
The related news Node B condition monitoring Message of condition monitoring Topic, and match
Testament theme Node B Will Topic and testament message Node B Will Message are set；A node subscribes to B node state
Theme Node B condition monitoring Topic and testament theme Node B Will Topic is monitored, B section is received
Status monitoring messages Node B condition monitoring Message when point operates normally disappears with testament when exception
Cease Node B Will Message；A node monitors the working condition and B of B node by status monitoring messages and testament message
The connectivity in channel；
When B node can not receive the status monitoring messages Node A condition monitoring Message of A node,
And when receiving Node A Will Message, the resource and service of adapter tube B node immediately；And issue AB heartbeat theme AB keep
The corresponding heart beat status message AB keep alive Message of alive Topic is published to server,
O&M service is according to AB heartbeat message AB keep alive Message, the Node A condition of A node
Monitoring Message and Node A Will Message positioning failure；
If AB keep alive Message show A node without heartbeat and receive Node A Will Message；
Or AB keep alive Message show A node without heartbeat, but do not receive Node A condition
A possibility that monitoring Message and Node A Will Message then judges A node failure is maximum, enters from A node
Hand checks failure；
If AB keep alive Message shows there is heartbeat and receiving Node A Will Message for A node；Or
If person AB keep alive Message display A node has heartbeat, but does not receive Node A condition
A possibility that monitoring Message and Node A Will Message then judges A channel failure is maximum, enters from A channel
Hand checks failure；
When A node can not receive the status monitoring messages Node B condition monitoring Message of B node,
And when receiving Node B Will Message, B node fault warning message is issued, backup machine is reminded to repair as early as possible extremely；Concurrently
The corresponding heart beat status message AB keep alive Message of cloth AB heartbeat theme AB keep alive Topic is published to
Server；
O&M service is according to AB heartbeat message AB keep alive Message, the Node A condition of B node
Monitoring Message and Node B Will Message positioning failure；
If AB keep alive Message is displayed without the heartbeat of B node, and receives Node B Will Message；
Or AB keep alive Message is displayed without the heartbeat of B node, but does not receive Node B condition
A possibility that monitoring Message and Node B Will Message then judges A node failure is maximum, enters from B node
Hand checks failure；
If AB keep alive Message shows the heartbeat of B node and receives Node B Will Message；Or
Person AB keep alive Message shows the heartbeat of B node, but does not receive Node B condition monitoring
A possibility that Message and Node B Will Message then judges A channel failure is maximum, starts with from channel B and checks failure.
Beneficial effects of the present invention:
1, news release/subscribing mechanism of MQTT and testament mechanism are applied to two-shipper mutually for scene, pass through publish/subscribe
Status monitoring messages and testament message monitor A, B two-shipper mutually.When host A exception standby host B immediately the resource of adapter tube host and
Service avoids heartbeat mechanism erroneous judgement Host Status between relying only on AB and fissure phenomenon occurs.Host publication is accused when standby host exception
It warns and reminds and repair as early as possible.
2, news release/subscribing mechanism of MQTT and testament mechanism are merged into use with heartbeat mechanism between AB, solved
Rely solely on the news release/subscribing mechanism and testament mechanism acknowledgement state of AB heartbeat mechanism or MQTT, when failure, no
The problem of node failure itself or channel connecting fault can quickly be positioned.
Detailed description of the invention
Network topology schematic diagram of the Fig. 1 between host node of the present invention, slave node and MQTT server.
Specific embodiment
See Fig. 1, it is a kind of based on MQTT communication and it is active and standby between heartbeat two unit standby method, feature of present invention is, will
MQTT customer end A, B node dual-host backup, wherein A is host equipment, B is mutually to back up to machine equipment, such as 1A, 1B, 2A, 2B
Mutually backup, 2A, 3B are mutually backed up, and so on；There is AB heartbeat between A node and B node, keeps heartbeat connection.Mutually
Monitoring；
A node is main equipment, normal to provide defined service resources and function services.B node is to save from equipment as A
The guest machine of point, is normally in standby, the adapter tube resource when A node cannot provide defined service resources and function services
And service；
A node is main equipment, normal to provide defined service resources and function services；The normal condition timing of A node is issued
The related news Node A condition of status monitoring theme Node A condition monitoring Topic
Monitoring Message, and configured testament theme Node A Will Topic and testament message Node A Will
Message；B node subscribes to A node state monitoring theme Node A condition monitoring Topic and testament theme
Node A Will Topic receives status monitoring messages Node A condition when A node operates normally
Testament message Node A Will Message when monitoring Message and exception；B node passes through status monitoring messages
With testament message, the working condition of A node and the connectivity of A channel are monitored；
B node is normally to be in standby from equipment as the guest machine of A node, cannot provide regulation in A node
Service resources and function services when adapter tube resource and service；B node normal condition timing issued state monitors theme Node B
The related news Node B condition monitoring Message of condition monitoring Topic, and match
Testament theme Node B Will Topic and testament message Node B Will Message are set；A node subscribes to B node state
Theme Node B condition monitoring Topic and testament theme Node B Will Topic is monitored, B section is received
Status monitoring messages Node B condition monitoring Message when point operates normally disappears with testament when exception
Cease Node B Will Message；A node monitors the working condition and B of B node by status monitoring messages and testament message
The connectivity in channel；
When B node can not receive the status monitoring messages Node A condition monitoring Message of A node,
And when receiving Node A Will Message, the resource and service of adapter tube B node immediately；And issue AB heartbeat theme AB keep
The corresponding heart beat status message AB keep alive Message of alive Topic is published to server,
O&M service is according to AB heartbeat message AB keep alive Message, the Node A condition of A node
Monitoring Message and Node A Will Message positioning failure；
If AB keep alive Message show A node without heartbeat and receive Node A Will Message；
Or AB keep alive Message show A node without heartbeat, but do not receive Node A condition
A possibility that monitoring Message and Node A Will Message then judges A node failure is maximum, enters from A node
Hand checks failure；
If AB keep alive Message shows there is heartbeat and receiving Node A Will Message for A node；Or
If person AB keep alive Message display A node has heartbeat, but does not receive Node A condition
A possibility that monitoring Message and Node A Will Message then judges A channel failure is maximum, enters from A channel
Hand checks failure；
When A node can not receive the status monitoring messages Node B condition monitoring Message of B node,
And when receiving Node B Will Message, B node fault warning message is issued, backup machine is reminded to repair as early as possible extremely；Concurrently
The corresponding heart beat status message AB keep alive Message of cloth AB heartbeat theme AB keep alive Topic is published to
Server；
O&M service is according to AB heartbeat message AB keep alive Message, the Node A condition of B node
Monitoring Message and Node B Will Message positioning failure；
If AB keep alive Message is displayed without the heartbeat of B node, and receives Node B Will Message；
Or AB keep alive Message is displayed without the heartbeat of B node, but does not receive Node B condition
A possibility that monitoring Message and Node B Will Message then judges A node failure is maximum, enters from B node
Hand checks failure；
If AB keep alive Message shows the heartbeat of B node and receives Node B Will Message；Or
Person AB keep alive Message shows the heartbeat of B node, but does not receive Node B condition monitoring
A possibility that Message and Node B Will Message then judges A channel failure is maximum, starts with from channel B and checks failure.
The present invention status monitoring messages, heartbeat message service status under different situations are analyzed as follows:
Scene 1: if A node faults itself, B node cannot subscribe to the Node A of A node by MQTT
Condition monitoring Message arrives A nodes heart beat by the way that AB heartbeat is unable to monitor.Vice versa.
Scene 2: if A channel failure, B node can subscribe to the shape Node A condition less than A node by MQTT
Monitoring Message can monitor A nodes heart beat by AB heartbeat.Vice versa.
Scene 3: if AB heartbeat failure, B node can subscribe to the Node A condition of A node by MQTT
Monitoring Message is monitored by AB heartbeat less than A nodes heart beat.Vice versa.
Scene 4: node, channel, AB heartbeat are all normal, then B node can subscribe to the Node A of A node by MQTT
Condition monitoring Message monitors A nodes heart beat by AB heartbeat.Similarly A node energy monitoring node.
Status monitoring messages, heartbeat message service status table under different situations
By the mutual publish/subscribe status monitoring information of MQTT and testament message, when B node does not receive the shape of A node
The resource and service of adapter tube A again when state monitoring information.It avoids because of AB heartbeat failure, in the normal A channel normal condition of A node
Under take over the resource and service of A, avoid fissure problem when scene 3.
By AB heartbeat and the mutual publish/subscribe status monitoring information of MQTT, solve that rely solely on AB heartbeat true
Recognize state, it, cannot quickly positioning node failure itself or channel connecting fault when failure.
Claims (1)
1. it is a kind of based on MQTT communication and it is active and standby between heartbeat two unit standby method, characterized in that by MQTT customer end A, B save
Point dual-host backup, wherein A is host equipment, B is to machine equipment, and 1A, 1B are mutually backed up, and 2A, 2B are mutually backed up, and 2A, 3B are mutual
Backup, and so on；There is AB heartbeat between A node and B node, keeps heartbeat connection, mutually monitor；
A node is main equipment, normal to provide defined service resources and function services；B node is from equipment, as A node
Guest machine is normally in standby, the adapter tube resource kimonos when A node cannot provide defined service resources and function services
Business；
A node is main equipment, normal to provide defined service resources and function services；A node normal condition timing issued state
Monitor theme: the related news of Node A condition monitoring Topic: Node A condition
Monitoring Message, and configured testament theme: Node A Will Topic and testament message: Node A Will
Message；B node subscribes to A node state monitoring theme Node A condition monitoring Topic and testament theme
Node A Will Topic receives status monitoring messages Node A condition when A node operates normally
Testament message Node A Will Message when monitoring Message and exception；B node passes through status monitoring messages
With testament message, the working condition of A node and the connectivity of A channel are monitored；
B node is normally to be in standby from equipment as the guest machine of A node, cannot provide defined industry in A node
Adapter tube resource and service when resource of being engaged in and function services；B node normal condition timing issued state monitors theme: Node B
The related news of condition monitoring Topic: Node B condition monitoring Message, and match
Testament theme: Node B Will Topic and testament message: Node B Will Message is set；A node subscribes to B node shape
State monitors theme Node B condition monitoring Topic and testament theme Node B Will Topic, receives B
Status monitoring messages Node B condition monitoring Message when node operates normally and testament when exception
Message Node B Will Message；A node by status monitoring messages and testament message, monitor B node working condition and
The connectivity of channel B；
When B node can not receive the status monitoring messages Node A condition monitoring Message of A node, and receive
When to Node A Will Message, the resource and service of adapter tube B node immediately；And issue AB heartbeat theme: AB keep
The corresponding heart beat status message of alive Topic: AB keep alive Message is published to server,
O&M service is according to AB heartbeat message AB keep alive Message, the Node A condition of A node
Monitoring Message and Node A Will Message positioning failure；
If AB keep alive Message show A node without heartbeat and receive Node A Will Message；Or
AB keep alive Message show A node without heartbeat, but do not receive Node A condition monitoring
A possibility that Message and Node A Will Message then judges A node failure is maximum, starts with from A node and checks failure；
If AB keep alive Message shows there is heartbeat and receiving Node A Will Message for A node；If
AB keep alive Message display A node has heartbeat, but does not receive Node A condition monitoring
A possibility that Message and Node A Will Message then judges A channel failure is maximum, starts with from A channel and checks failure；
When A node can not receive the status monitoring messages Node B condition monitoring Message of B node, and receive
When to Node B Will Message, B node fault warning message is issued, backup machine is reminded to repair as early as possible extremely；And issue AB
Heartbeat theme: the corresponding heart beat status message of AB keep alive Topic: AB keep alive Message is published to clothes
Business device；
O&M service is according to AB heartbeat message AB keep alive Message, the Node A condition of B node
Monitoring Message and Node B Will Message positioning failure；
If AB keep alive Message is displayed without the heartbeat of B node, and receives Node B Will Message；Or
AB keep alive Message is displayed without the heartbeat of B node, but does not receive Node B condition monitoring
A possibility that Message and Node B Will Message then judges A node failure is maximum, starts with from B node and checks failure；
If AB keep alive Message shows the heartbeat of B node and receives Node B Will Message；Or AB
Keep alive Message shows the heartbeat of B node, but does not receive Node B condition monitoring
A possibility that Message and Node B Will Message then judges A channel failure is maximum, starts with from channel B and checks failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135172.4A CN109286525B (en) | 2018-09-28 | 2018-09-28 | Double-computer backup method based on MQTT communication and heartbeat between main and standby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135172.4A CN109286525B (en) | 2018-09-28 | 2018-09-28 | Double-computer backup method based on MQTT communication and heartbeat between main and standby |
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| CN109286525A true CN109286525A (en) | 2019-01-29 |
| CN109286525B CN109286525B (en) | 2022-02-25 |
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| CN110166487A (en) * | 2019-06-19 | 2019-08-23 | 深圳聚点互动科技有限公司 | Lan device information transferring method, main equipment, storage medium and smart machine |
| CN110278248A (en) * | 2019-05-29 | 2019-09-24 | 平安科技（深圳）有限公司 | Testament message distributing method, device and computer readable storage medium |
| CN110515776A (en) * | 2019-08-30 | 2019-11-29 | 南京图格医疗科技有限公司 | A kind of two-unit standby system and backup method |
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| CN109286525B (en) | 2022-02-25 |
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