CN109344015B - Method and system for preventing double main nodes by using HA (home agent) for database service - Google Patents
Method and system for preventing double main nodes by using HA (home agent) for database service Download PDFInfo
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- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
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- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
- G06F11/2046—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant where the redundant components share persistent storage
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
- G06F11/2023—Failover techniques
- G06F11/2028—Failover techniques eliminating a faulty processor or activating a spare
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/80—Database-specific techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/82—Solving problems relating to consistency
Abstract
A method for a database service to use HA to guard against dual master nodes, comprising: s1, in the double-computer HA cluster system, setting local monitor ports in the database service of the main computer and the backup computer, before starting the database instance, monitoring the local monitor port first, which is used to receive the connection of other database instances to the local monitor port; s2, in the double-machine HA cluster system, setting the connection IP address of the opposite-end server in the database service on the main machine and the standby machine respectively; s3, in the double-machine HA cluster system, when the HA cluster resource manager starts the resource of the database service, the database service firstly monitors the locally set monitoring port for preventing double masters, and then connects the monitoring port of the database service of the opposite terminal through the set opposite terminal server IP; s4, executing the starting process of the local database instance, and executing other starting processes in the HA cluster system until the dual-machine HA cluster system is started successfully.
Description
Technical Field
The invention relates to the technical field of server clustering, in particular to a method and a system for preventing double main nodes by using HA (home agent) for database service.
Background
A High Availability Cluster (High Availability Cluster) is a server clustering technology, and is an effective solution for improving the service Availability of a system and ensuring the continuity of a service system. In a dual-machine HA cluster system with a master-slave working mode, a host provides service to the outside, and a standby machine is in a monitoring preparation state; when the host computer is unavailable due to system hardware or software errors, the standby computer can automatically detect faults without manual intervention, automatically switch services, take over all work of the host computer and automatically ensure that the system continuously provides services to the outside. In order to ensure the data consistency of the host and the standby, the dual-machine HA system accesses data in a shared storage mode. When the host provides service to the outside, the storage system is mounted on the host, and the standby machine is not mounted. And when the fault is switched, the cluster system automatically realizes the stop, transfer and restart of the storage service.
High availability of services is achieved inside the HA cluster through the cluster resource manager. The HA cluster comprises VIP, service, isolation equipment, a file system and the like which are defined as resources, and a cluster resource manager monitors and counts the state of each resource and determines the stop, transfer and start of the resource. When the host provides service to the outside, the resources defined in the cluster run on the host, and after the host fails, the cluster resource manager stops the resources on the host and starts the resources on the standby to realize resource transfer, so that the standby continues to provide service to the outside. The database service is used as a system service and can be managed as a resource in the HA cluster system, so that the high availability of the database service provided by the HA cluster system can be realized. When a highly available database service is deployed using an HA cluster system, the data files of the database are stored on a shared storage system, and the database instances run on cluster servers.
The high-availability database service is deployed through the HA cluster system, the high availability of the database service is realized on a server level, the unavailability of the database service caused by single-point faults is avoided, meanwhile, the cluster system as a whole provides network and computing service for upper-layer application, the implementation details of a bottom-layer system are shielded for the application, the application sensing is a single system, the cluster system does not obviously increase the complexity of the upper-layer application, and meanwhile, the high-availability and high-expansion characteristics are achieved, so that the system architecture HAs obvious application advantages compared with a single-machine system. At present, when an HA software deployment database high-availability cluster is used, because the interior of the cluster communicates with nodes through a heartbeat mechanism, node faults are detected and judged, and the like, the probability of misjudgment of fault nodes sometimes exists due to the influence of the reliability of the heartbeat mechanism of the cluster system and BUG factors in the HA software, and the problem of double main nodes is caused. For a high availability cluster of a database, data files of the database are stored in a shared storage, and only one database instance is allowed to perform data access. When the dual master nodes appear, the same data file can be accessed by the master and slave database instances at the same time, and the data file is fatally damaged.
Disclosure of Invention
In view of the above, the present invention provides a method and system for preventing dual master nodes by using HA for database services.
A method for a database service to use HA to guard against dual master nodes, comprising the steps of:
s1, in the double-machine HA cluster system, setting local monitor ports in the database service of the main machine and the standby machine, before starting the database instance, monitoring the local monitor port first, for receiving the connection of other database instances to the local monitor port;
s2, in the double-machine HA cluster system, setting the connection IP address of the opposite-end server in the database service on the main machine and the standby machine respectively, and before starting the local database instance, firstly connecting the monitoring port of the opposite-end server through the IP address;
s3, in the double-machine HA cluster system, when the HA cluster resource manager starts the resource of the database service, the database service firstly monitors the locally set monitoring port for preventing double main, and then connects the monitoring port of the database service of the opposite terminal through the set opposite terminal server IP; if the connection is successful, go to step S4; otherwise, terminating the starting process of the database instance;
and S4, executing the starting process of the local database instance, and executing other starting processes in the HA cluster system until the dual-machine HA cluster system is successfully started.
In the method for database service using HA to prevent dual master nodes according to the present invention,
the host machine and the standby machine use shared storage to ensure data consistency.
In the method for database service using HA to prevent dual master nodes according to the present invention,
the host and the standby monitor and detect the faults of the dual-computer HA cluster system through a heartbeat mechanism.
The invention also provides a system for preventing the double main nodes by using the HA for the database service, which comprises the following units:
the port configuration unit is used for respectively setting local monitoring ports in database services on the host and the standby in the dual-computer HA cluster system, and monitoring the local monitoring ports before starting the database instances to receive the connection of other database instances to the local monitoring ports;
the address configuration unit is used for respectively setting connection IP addresses of the opposite-end server in database services on the host and the standby in the HA cluster system of the two computers, and is used for connecting a monitoring port of the opposite-end server through the IP addresses before starting a local database instance;
the monitoring unit is used for monitoring a locally-arranged monitoring port for preventing double masters when an HA cluster resource manager starts resources of the database service in the double-machine HA cluster system, and then connecting the port monitored by the database service of the opposite terminal through a set opposite terminal server IP; if the connection is successful, executing a starting unit; otherwise, terminating the starting process of the database instance;
and the starting unit is used for executing the starting process of the local database instance and executing other starting processes in the HA cluster system until the dual-computer HA cluster system is successfully started.
In the system of the present invention in which the database service uses HA to prevent dual master nodes,
the host machine and the standby machine use shared storage to ensure data consistency.
In the system of the present invention in which the database service uses HA to prevent dual master nodes,
the host and the standby monitor and detect the faults of the dual-computer HA cluster system through a heartbeat mechanism.
Compared with the prior art, the method and the system for preventing the double main nodes by using the HA for the database service have the following beneficial effects that:
(1) when the host starts the database service according to the normal flow and provides the service to the outside, the host misjudges the fault due to the unreliability of the fault detection of the HA software, and at this time, the HA software automatically switches the service and starts the database resource on the standby computer.
(2) When the standby machine database is started, the host machine IP address is firstly used to connect the host machine monitoring port, and because the host machine database instance is started, the connection success information is returned at the moment.
(3) And after receiving the connection success information, the standby database service automatically terminates the starting process of the local database instance, thereby avoiding double masters and protecting the database data files from being damaged.
Drawings
FIG. 1 is a schematic diagram of an HA dual cluster system;
FIG. 2 is a flow chart of high availability database service initiation in the HA dual cluster system;
FIG. 3 is a conventional flow chart of HA dual cluster system startup;
fig. 4 is a schematic diagram of the HA dual-cluster system prevention dual master principle.
Detailed Description
As shown in fig. 1 to 4, a method for a database service to prevent dual master nodes using HA includes the following steps:
s1, in the double-machine HA cluster system, setting local monitor ports in the database service of the main machine and the standby machine, before starting the database instance, monitoring the local monitor port first, for receiving the connection of other database instances to the local monitor port;
s2, in the double-machine HA cluster system, setting the connection IP address of the opposite-end server in the database service on the main machine and the standby machine respectively, and before starting the local database instance, firstly connecting the monitoring port of the opposite-end server through the IP address;
s3, in the double-machine HA cluster system, when the HA cluster resource manager starts the resource of the database service, the database service firstly monitors the locally set monitoring port for preventing double masters, and then connects the monitoring port of the database service of the opposite terminal through the set opposite terminal server IP; if the connection is successful, go to step S4; otherwise, terminating the starting process of the database instance;
s4, executing the starting process of the local database instance, and executing other starting processes in the HA cluster system until the dual-machine HA cluster system is started successfully.
In the method for database service using HA to prevent dual master nodes according to the present invention,
the host machine and the standby machine use shared storage to ensure data consistency.
In the method for database service using HA to prevent dual master nodes according to the present invention,
the host and the standby monitor and detect the faults of the dual-computer HA cluster system through a heartbeat mechanism.
The invention also provides a system for preventing the double main nodes by using the HA for the database service, which comprises the following units:
the port configuration unit is used for respectively setting local monitoring ports in database services on the host and the standby in the dual-computer HA cluster system, and monitoring the local monitoring ports before starting the database instances to receive the connection of other database instances to the local monitoring ports;
the address configuration unit is used for respectively setting connection IP addresses of the opposite-end server in database services on the host and the standby in the HA cluster system of the two computers, and is used for connecting a monitoring port of the opposite-end server through the IP addresses before starting a local database instance;
the monitoring unit is used for monitoring a locally-arranged monitoring port for preventing double masters when the HA cluster resource manager starts the resources of the database service in the double-machine HA cluster system, and then connecting the port monitored by the database service of the opposite terminal through the arranged opposite terminal server IP; if the connection is successful, executing a starting unit; otherwise, terminating the starting process of the database instance;
and the starting unit is used for executing the starting process of the local database instance and executing other starting processes in the HA cluster system until the dual-computer HA cluster system is successfully started.
In the system of the present invention in which the database service uses HA to prevent dual master nodes,
the host machine and the standby machine use shared storage to ensure data consistency.
In the system of the present invention in which the database service uses HA to prevent dual master nodes,
the host and the standby monitor and detect the faults of the dual-computer HA cluster system through a heartbeat mechanism.
Compared with the prior art, the method and the system for preventing the double main nodes by using the HA for the database service have the following beneficial effects that:
(1) when the host starts the database service according to the normal flow and provides the service to the outside, the host misjudges the fault due to the unreliability of the fault detection of the HA software, and at this time, the HA software automatically switches the service and starts the database resource on the standby computer.
(2) When the standby machine database is started, the host machine IP address is firstly used to connect the host machine monitoring port, and because the host machine database instance is started, the connection success information is returned at the moment.
(3) And after receiving the connection success information, the standby database service automatically terminates the starting process of the local database instance, thereby avoiding double masters and protecting the database data files from being damaged.
FIG. 1 is a schematic diagram of HA dual cluster system architecture, in which
The host and the standby use shared storage to ensure data consistency; the host machine and the standby machine monitor and detect system faults through a heartbeat mechanism, so that automatic switching is performed; the host machine and the standby machine serve as a unified whole to provide services to the outside; when the host computer serves the outside, the standby computer is in a monitoring preparation state;
fig. 2 is a schematic flow chart of starting a database instance by using the method of the present invention when deploying a high-availability service of a database in an HA dual-machine cluster system.
Fig. 4 is a schematic diagram illustrating the principle of preventing dual masters by using the method of the present invention when high-availability services of databases are deployed in an HA dual-master cluster system. In the context of the attached figure 4,
step 10) in the dual-host HA cluster system, a local monitoring port is set in the database service on the host and the standby, and before starting the database instance, the port is monitored first to receive the connection of other database instances to the port.
Step 20) in the dual-machine HA cluster system, a connection IP address of the peer server is set in the database service on the primary and standby machines, respectively, and before starting the local database instance, the connection IP address is first connected to the monitoring port of the peer server through the IP address.
Step 30) in the dual-machine HA cluster system, when the HA cluster resource manager starts the resource of the database service, the database service firstly monitors the locally set monitoring port for preventing dual masters, and then the monitoring port of the database service of the opposite end is connected through the set opposite end server IP. If the connection is successful, continue with step 40); otherwise, the starting process of the database instance is terminated.
And step 40) normally executing the starting process of the local database instance, and normally executing other starting processes in the HA cluster system until the dual-computer HA cluster system is successfully started.
The prevention dual principle of the method of the present invention is described below with reference to fig. 3 and 4:
FIG. 3 is a conventional flow diagram of a process not using the present invention,
(1) when the host starts the database service according to the normal flow and provides the service to the outside, the host misjudges the fault due to the unreliability of the fault detection of the HA software, at this time, the HA software automatically switches the service, starts the database resource on the standby machine, namely, the database service on the standby machine is started, and the starting is successful.
(2) The backup database service is successfully started while the host database service is not stopped, thereby creating a double master with the risk of database damage.
The method of the invention is adopted in the attached figure 4, so that the double main problems are avoided:
(1) when the host starts the database service according to the normal flow and provides the service to the outside, the host misjudges the fault due to the unreliability of the fault detection of the HA software, and at this time, the HA software automatically switches the service and starts the database resource on the standby computer.
(2) When the standby machine database is started, the host machine IP address is firstly used to connect the host machine monitoring port, and because the host machine database instance is started, the connection success information is returned at the moment.
(3) And after receiving the connection success information, the standby database service automatically terminates the starting process of the local database instance, thereby avoiding double masters and protecting the database data files from being damaged.
It is understood that various other changes and modifications may be made by those skilled in the art based on the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the claims of the present invention.
Claims (6)
1. A method for database services to use HA to guard against dual master nodes, comprising the steps of:
s1, in the double-computer HA cluster system, setting local monitor ports in the database service of the main computer and the backup computer, before starting the database instance, monitoring the local monitor port first, which is used to receive the connection signal of other database instances to the local monitor port;
s2, in the double-machine HA cluster system, setting the connection IP address of the opposite-end server in the database service on the main machine and the standby machine respectively, and before starting the local database instance, firstly connecting the monitoring port of the opposite-end server through the IP address;
s3, in the double-machine HA cluster system, when the HA cluster resource manager starts the resource of the database service, the database service firstly monitors the locally set monitoring port for preventing double main, and then connects the monitoring port of the database service of the opposite terminal through the set opposite terminal server IP; if the connection is successful, terminating the starting process of the database instance; otherwise, go to step S4;
and S4, executing the starting process of the local database instance, and executing other starting processes in the HA cluster system until the dual-machine HA cluster system is successfully started.
2. The method of database service usage HA for dual master node prevention of claim 1,
the host machine and the standby machine use shared storage to ensure data consistency.
3. The database service usage HA prevention method of claim 1,
the host and the standby monitor and detect the faults of the dual-computer HA cluster system through a heartbeat mechanism.
4. A system for database services to guard against dual master nodes using HA, comprising:
the port configuration unit is used for respectively setting local monitoring ports in database services on the host and the standby in the dual-computer HA cluster system, and monitoring the local monitoring ports before starting the database instances to receive connection signals of other database instances aiming at the local monitoring ports;
the system comprises an address configuration unit, a monitoring unit and a monitoring unit, wherein the address configuration unit is used for setting connection IP addresses of an opposite-end server in database services on a host and a standby respectively in a dual-machine HA cluster system, and is used for connecting a monitoring port of the opposite-end server through the IP addresses before starting a local database instance;
the monitoring unit is used for monitoring a locally-arranged monitoring port for preventing double masters when an HA cluster resource manager starts resources of the database service in the double-machine HA cluster system, and then connecting the port monitored by the database service of the opposite terminal through a set opposite terminal server IP; if the connection is successful, terminating the starting process of the database instance; otherwise, executing the starting unit;
and the starting unit is used for executing the starting process of the local database instance and executing other starting processes in the HA cluster system until the dual-computer HA cluster system is successfully started.
5. The database service usage HA prevention system of claim 4,
the host machine and the standby machine use shared storage to ensure data consistency.
6. The database service usage HA prevention system of claim 4,
the host and the standby monitor and detect the faults of the dual-computer HA cluster system through a heartbeat mechanism.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340272A (en) * | 2008-08-25 | 2009-01-07 | 中兴通讯股份有限公司 | Double machine switching method and system |
| CN103220183A (en) * | 2013-05-02 | 2013-07-24 | 杭州电子科技大学 | Implement method of Hadoop high-availability system based on double-main-engine warm backup |
| CN104378232A (en) * | 2014-11-10 | 2015-02-25 | 东软集团股份有限公司 | Schizencephaly finding and recovering method and device under main joint and auxiliary joint cluster networking mode |
| CN106330475A (en) * | 2015-06-15 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for managing main and standby nodes in communication system and high availability cluster |
| CN107634855A (en) * | 2017-09-12 | 2018-01-26 | 天津津航计算技术研究所 | A kind of double hot standby method of embedded system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080091895A1 (en) * | 2006-10-11 | 2008-04-17 | Inventec Corporation | Cache data backup method and system for computer clustering systems |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340272A (en) * | 2008-08-25 | 2009-01-07 | 中兴通讯股份有限公司 | Double machine switching method and system |
| CN103220183A (en) * | 2013-05-02 | 2013-07-24 | 杭州电子科技大学 | Implement method of Hadoop high-availability system based on double-main-engine warm backup |
| CN104378232A (en) * | 2014-11-10 | 2015-02-25 | 东软集团股份有限公司 | Schizencephaly finding and recovering method and device under main joint and auxiliary joint cluster networking mode |
| CN106330475A (en) * | 2015-06-15 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for managing main and standby nodes in communication system and high availability cluster |
| CN107634855A (en) * | 2017-09-12 | 2018-01-26 | 天津津航计算技术研究所 | A kind of double hot standby method of embedded system |
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