CN108628717A - A kind of Database Systems and monitoring method - Google Patents
A kind of Database Systems and monitoring method Download PDFInfo
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- CN108628717A CN108628717A CN201810174967.XA CN201810174967A CN108628717A CN 108628717 A CN108628717 A CN 108628717A CN 201810174967 A CN201810174967 A CN 201810174967A CN 108628717 A CN108628717 A CN 108628717A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored
- G06F11/302—Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system component is a software system
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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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/142—Reconfiguring to eliminate the error
- G06F11/143—Reconfiguring to eliminate the error with loss of software functionality
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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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1438—Restarting or rejuvenating
-
- 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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1479—Generic software techniques for error detection or fault masking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3051—Monitoring arrangements for monitoring the configuration of the computing system or of the computing system component, e.g. monitoring the presence of processing resources, peripherals, I/O links, software programs
Abstract
This application discloses a kind of Database Systems, including：Monitored node group receives condition monitoring and the switching control of monitoring node for externally providing service by the monitored node with master-slave back-up relationship；Node is monitored, the operating status for obtaining monitored node in the monitored node group is based on the operating status, and control monitored node switches over.To provide more reliable High Availabitity Redis Database Systems, reading speed is slow caused by solving the problems, such as secondary positioning.
Description
Technical field
This application involves field of computer technology, and in particular to a kind of Database Systems.The application is related to a kind of use simultaneously
In the monitoring method and device of Database Systems.
Background technology
As the Internet model and the development of service, web site performance are increasingly paid attention to by Internet enterprises.In order to optimize
Web site performance promotes response speed, and high concurrent hot spot data is generally cached (Cache) in memory by website, rather than directly
Data are read from back-end data base, for example, electric business promotes scene, movable meeting-place page is generally concentrated at the progress of some time point
Promotion, the QPS (Query Per Second or per second query rates) of these pages is often especially high, can generally use big portion
The request of point identical information is pressed in alleviates the pressure of database on caching, to support high concurrent to access；So-called QPS is mutual
The index of server, i.e. server manageable request amount per second are weighed in networking.Wherein, Redis is common website
Cache (caching) tool.So-called Redis is that a use ANSI C language increased income writes, supports network, can be based on memory
Also can persistence log type, Key-Value databases.Redis clusters are often built by the way of cluster (i.e. in website
Redis Cluster) to ensure the high availability of Redis, service is persistently provided, ensures that service can be used always.
Existing Redis officials Clustering scheme is tieed up using non-stop layer mode by interchange messages between node
It is unified to protect cluster state, Fig. 3 shows the Redis officials aggregated structure schematic diagram of the prior art, wherein the circle in figure indicates
Run the node of Redis.The program distributes number using the mode of Hash slot (hash slot, i.e., the slot distributed with hash algorithm)
According to 16384 slot (it is marked as 0~16383) of the Redis clusters default allocation built, these slots are divided according to setting
It is fitted on different Redis nodes, all Redis node mutual connections, inside optimizes transmission speed using binary protocol
And bandwidth, client only need to connect any one enabled node in cluster, store true according to key according to following algorithm when data
The node in the Hash slot section that store surely：CRC16 (key) %16384；CRC16 in the algorithmic formula is data communication
It is used for a kind of debugging check code of data transmission error detection in field, i.e., polynomial computation is carried out to data, obtained result is attached
Behind data packet, receiving device also executes similar algorithm, to ensure the correctness and integrality of data transmission.
There are the following problems in existing Redis officials Clustering scheme：Since Redis Cluster regard one as
Whole, client connection wherein any one node is operated, and is connected when the key of client request inquiry is not stored in it
Present node on when, needing secondary positioning to complete operation causes reading speed slow, i.e., present node returns to redirection information and refers to
To correct node to complete to operate.
Invention content
The application provides a kind of Database Systems, and the key to solve client request operation is not stored in what it was connected
The problem for needing secondary positioning to complete operation when on present node and causing reading speed slow.
In addition the application provides a kind of monitoring method for Database Systems.
The application also provides a kind of monitoring device for Database Systems.
The application provides a kind of Database Systems, including：Monitored node group, monitoring node；Wherein,
Monitored node group receives prison for externally providing service by the monitored node with master-slave back-up relationship
Control condition monitoring and the switching control of node；
Node is monitored, the operating status for obtaining monitored node in the monitored node group is based on the operation
State, control monitored node switch over.
Optionally, the monitored node group is two quilts with master-slave back-up relationship by running Redis databases
Node composition is monitored, one is host node, and another is to keep heartbeat detection and data same from node, host node and between node
Step.
Optionally, the monitoring node, including detection module, for according to long periodicity when setting to monitored node group
Sense command is sent, command execution results is received, determines the operating status of the monitored node.
Optionally, the sense command is to write data command or reading data command.
Optionally, the detection module, including condition adjudgement submodule, for carrying out following processing：
If write data order return runs succeeded, judge the operating status of monitored node for normal condition；It is no
Then, the operating status of monitored node is abnormality；Alternatively,
If the reading data command return runs succeeded, and read-out result is used for condition adjudgement with what is be previously written
Fixed data it is consistent, then judge the operating status of monitored node for normal condition；Otherwise, the operating status of monitored node
For abnormality.
Optionally, the monitoring node, including from node failure processing module, for carrying out from the abnormality of node
Reason, including：
If the operating status of the host node be normal condition, and it is described from the operating status of node be abnormality,
From node processes described in then terminating, and restart described from node processes.
Optionally, it from node processes described in the termination, and restarts described from node processes, including following processing：
It is described from node processes to execute kill orders termination；
It empties described from node perdurable data；
From node processes described in starting, the host node belonging to it is specified；
The host node data full dose is synchronized to described from node.
Optionally, the monitoring node, including VIP management modules, for being arranged and managing the monitored node group
Virtual IP address；Wherein, the monitored node group externally provides service by virtual IP address.
Optionally, the monitoring node, including handover module are cut for carrying out principal and subordinate in the primary node status exception
It changes, including following processing：
If the operating status of the host node be abnormality and it is described from the operating status of node be normal condition,
It is promoted to new host node from node by described, deletes virtual IP address from former host node, and virtual IP address is floated to new host node.
Optionally, the handover module, including node bring back to life submodule, for bringing back to life abnormal former host node.
Optionally, described to bring back to life abnormal former host node, including following processing：
Judge that former host node Redis processes whether there is；
If so, executing kill terminates former host node Redis processes, former host node data are emptied；The former main section of restarting
Redis processes on point, are set to new from node, and synchrodata is asked to new host node.
Optionally, the monitored node group, quantity are more than 1.
Optionally, the monitored node is additionally operable to receive and orders and return to implementing result, including：
Receive the sense command of the monitoring node, and return command implementing result；And/or
The switching command for receiving the monitoring node, executes corresponding operation.
The application also provides a kind of monitoring method for Database Systems, including：
Sense command is sent to monitored node group；
Command execution results are received, the fortune of monitored node in monitored node group is determined according to the command execution results
Row state；
Based on the operating status, control monitored node switches over.
Optionally, the monitored node group is two quilts with master-slave back-up relationship by running Redis databases
Node composition is monitored, one is host node, and another is to keep heartbeat detection and data same from node, host node and between node
Step.
Optionally, described to send sense command, including following processing to monitored node group：
According to long periodicity when setting sense command is sent to monitored node group.
Optionally, the host node and described from node has been respectively configured for connect the management IP monitored, has passed through the pipe
It manages IP and receives the sense command, and return command implementing result.
Optionally, the sense command is to write data command or reading data command.
Optionally, the operation shape that monitored node in monitored node group is determined according to the command execution results
State, including：
If write data order return runs succeeded, judge the operating status of monitored node for normal condition；It is no
Then, the operating status of monitored node is abnormality；Alternatively,
If the reading data command return runs succeeded, and read-out result is used for condition adjudgement with what is be previously written
Fixed data it is consistent, then judge the operating status of monitored node for normal condition；Otherwise, the operating status of monitored node
For abnormality.
Optionally, described to be based on the operating status, control monitored node switches over, including following processing：
If the operating status of the host node be normal condition, and it is described from the operating status of node be abnormality,
From node processes described in then terminating, and restart described from node processes.
Optionally, it from node processes described in the termination, and restarts described from node processes, including following processing：
It is described from node processes to execute kill orders termination；
It empties described from node perdurable data；
From node processes described in starting, the host node belonging to it is specified；
The host node data full dose is synchronized to described from node.
Optionally, the monitored node group externally provides the mode of service, is to provide service by virtual IP address.
Optionally, described to be based on the operating status, control monitored node switches over, including following processing：
Judge the operating status of the host node for abnormality, and it is described from the operating status of node be normal shape
State；It is then promoted to new host node from node by described, deletes virtual IP address from former host node, and virtual IP address is floated to new master
Node.
Optionally, described to be based on the operating status, control monitored node switches over, including following processing：
Judge that former host node Redis processes whether there is；
If so, executing kill terminates former host node Redis processes, former host node data are emptied；The former main section of restarting
Redis processes on point, are set to new from node, ask data full dose being synchronized to new host node new from section
Point.
Optionally, the operation shape that monitored node in monitored node group is determined according to the command execution results
State, after this step, including following processing：
If monitored node is host node, judge to whether there is VIP on the host node；If it is not, then giving the host node
VIP is set.
Optionally, the monitored node group, quantity are more than 1.
The application also provides a kind of monitoring device for Database Systems, including：
Detection unit, for sending sense command to monitored node group；
Status determining unit determines monitored node for receiving command execution results according to the command execution results
The operating status of monitored node in group；
Switch unit, for being based on the operating status, control monitored node switches over.
Compared with prior art, the application has the following advantages：
Database Systems provided by the present application, including：Monitored node group, for passing through the quilt with master-slave back-up relationship
Monitoring node externally provides service, receives condition monitoring and the switching control of monitoring node；Node is monitored, for obtaining
The operating status of monitored node in the monitored node group, is based on the operating status, and control monitored node is cut
It changes.By making data be stored in each node without fragment, secondary positioning scene is not present, and work as main Redis node failures
Automatically it will be upgraded to new main Redis nodes from Redis nodes, while bringing back to life the main Redis nodes of original of failure, ensure that entire cluster is held
Continuous offer service provides more reliable High Availabitity Redis data to solve the problems, such as that reading speed caused by secondary positioning is slow
Library system.
Description of the drawings
Fig. 1 is a kind of Database Systems configuration diagram provided by the embodiments of the present application；
Fig. 2 Redis high-availability systems structural schematic diagrams provided by the embodiments of the present application；
Fig. 3 is the Redis officials aggregated structure schematic diagram of the prior art；
Fig. 4 is a kind of process chart of monitoring method for Database Systems provided by the embodiments of the present application；
Fig. 5 is the Redis high-availability systems of monitoring method of the deployment provided by the embodiments of the present application for Database Systems
Structural schematic diagram；
Fig. 6 is Redis high-availability systems master-slave swap process schematic provided by the embodiments of the present application；
Fig. 7 is a kind of monitoring device schematic diagram for Database Systems provided by the embodiments of the present application.
Specific implementation mode
Many details are elaborated in the following description in order to fully understand the application.But the application can be with
Much implement different from other manner described here, those skilled in the art can be without prejudice to the application intension the case where
Under do similar popularization, therefore the application is not limited by following public specific implementation.
The application provides a kind of Database Systems.The application be related to simultaneously a kind of monitoring method for Database Systems and
Device.It is described in detail one by one in the following embodiments.
The application one embodiment provides a kind of Database Systems.
A kind of Database Systems provided by the embodiments of the present application are illustrated below in conjunction with Fig. 1 to Fig. 2 and Fig. 6.Wherein,
Fig. 1 is a kind of Database Systems configuration diagram provided by the embodiments of the present application；Fig. 2 Redis high provided by the embodiments of the present application
Available system structural schematic diagram；Fig. 6 is Redis high-availability systems master-slave swap process schematic provided by the embodiments of the present application.
Database Systems shown in FIG. 1, including：Monitored node group 101 and monitoring node 102.
The monitored node group 101, for externally providing service by the monitored node with master-slave back-up relationship,
Receive condition monitoring and the switching control of monitoring node.
Website often caches high concurrent hot spot data with Redis rather than is directly read from back-end data base, to promote sound
Speed is answered, it is extremely important to build the offer service of High Availabitity Redis systems stays.Redis be one based on memory can also be lasting
The Key-Value databases of change.
Database Systems provided by the embodiments of the present application, are Redis high-availability systems, configuration diagram referring to Fig. 2, this
Kind framework mode data do not need fragment write-in, therefore secondary orientation problem is not present when reading.
The monitored node group 101, specifically two quilts with master-slave back-up relationship by running Redis databases
Node composition is monitored, one is host node 101-1, another for from node 101-2, host node and from keeping heartbeat detection between node
It is synchronous with data, service is really externally provided by host node, and from node as backup, the server sections of two operation Redis
Point is also Redis nodes.The master-slave back-up relationship refers to keeping main Redis nodes synchronous with from Redis nodes, specific to
It is same to configure Redis environment in the embodiment of the present application, from the Redis node initializing stages, connected from Redis nodes
The data full dose on main Redis nodes is synchronized to from Redis nodes after to main Redis nodes, and is starting to work normally
After carry out increment synchronization, the write operation of main Redis nodes will be synchronized to from Redis nodes, keep host node and two from node
A database data is consistent.
In the embodiment of the present application, the monitored node group externally provides the mode of service, is provided by virtual IP address
Service, i.e., client is communicated by the host node in virtual IP address and monitored node group, interactive information.Specifically, only
At least needed in the case of one monitored node group give monitored node group plan three IP address, including two management IP and
One virtual IP address for externally providing service connection client, i.e., the host node of the described monitored node group and from node are matched respectively
The management IP for connecting monitoring node has been set, the monitoring of monitoring node is received by management IP；And client and monitored
The communication of node group is to carry out socket communications by virtual IP address.The virtual IP address (or VIP, i.e. Virtual IP), is one
Not with network interface card (or the NIC, i.e. Network in certain computer (or server) or a computer (or server)
Interface Card) connected IP address, data packet is sent to this address VIP, but all data are still passed through
True network interface forwarding；VIP is chiefly used in connecting redundancy, for example, in a computer or NIC event occurs for an address VIP
Transfer to another optional computer or NIC that can still respond connection when barrier.By host node and from node duoble computer disaster-tolerance, externally use
Virtual IP address provides service, avoids single machine failure risk, when a node breaks down, still can keep externally servicing,
Improve the availability of whole system.
In the embodiment of the present application, the monitored node in monitored node group 101, also reception, which are ordered and returned, executes knot
Fruit specifically includes：
Receive the sense command of the monitoring node, and return command implementing result；And/or
The switching command for receiving the monitoring node, executes corresponding operation.
The monitoring node 102, the operating status for obtaining monitored node in the monitored node group are based on institute
Operating status is stated, control monitored node switches over.
In the embodiment of the present application, the monitoring node 102 is the server node of an operation monitoring tools, and effect is
Control the master-slave swap of monitored node group.Specifically, the monitoring tools, are write using shell, when the event of main Redis nodes
When barrier, new host node will be promoted to from Redis nodes automatically, and the main Redis nodes of original of failure are brought back to life, ensures entire number
Service is provided according to library systems stay, ensures high availability；The monitoring tools that Shell writes can run directly in most service
Device, good compatibility.
It should be noted that in actual deployment, monitoring tools can monitor multigroup principal and subordinate Redis nodes simultaneously, i.e., monitored
The quantity of node group can be more than 1.For example, two groups of Redis main and subordinate nodes are as follows：
Monitored node group A：Main Redis 10.0.0.2slave redis 10.0.0.2vip 10.0.0.5
Monitored node group B：master redis 10.0.0.11slave redis 10.0.0.12vip
10.0.0.15；This two groups of Redis nodes are connected to the monitored tool monitoring of monitoring node.
Preferably, the monitoring node, including detection module, for according to long periodicity when setting to monitored node group
Sense command is sent, command execution results is received, determines the operating status of the monitored node.For example, the embodiment of the present application
In, the monitoring node issues detection life to host node and from node respectively by host node and from the respective management IP of node
It enables, detects host node and the state from node.Wherein, the sense command is to write data command or reading data command.For example,
Every five seconds for example writes 123456 data to host node and from one key fixed to one of node transmission；Alternatively, having prestored specific
The corresponding values of the key can be read with save value 123456, every five seconds for example.
In the embodiment of the present application, the detection module, including condition adjudgement submodule, for writing data command according to above-mentioned
Or read returning the result for data command and judge whether the operating status of each node normal, it specifically includes and carries out following processing：
If write data order return runs succeeded, judge the operating status of monitored node for normal condition；It is no
Then, the operating status of monitored node is abnormality；Alternatively,
If the reading data command return runs succeeded, and read-out result is used for condition adjudgement with what is be previously written
Fixed data it is consistent, then judge the operating status of monitored node for normal condition；Otherwise, the operating status of monitored node
For abnormality.
For example, judging state according to write operation, 123456 are respectively written into main Redis nodes and from Redis nodes,
KEY is key0, if the orders of SET key0 123456 return successfully, then it is assumed that operating status is normal；Judge shape according to read operation
State, main Redis nodes and has been previously written 123456, KEY key0 from Redis nodes, if GET key0 orders return
123456, then it is assumed that operating status is normal.
In the embodiment of the present application, the monitoring node 102 further includes handover module, and the handover module is used in the master
Master-slave swap, including following processing are carried out when node state exception：If the operating status of the host node be abnormality and
It is described from the operating status of node be normal condition, then new host node is promoted to from node by described, from former host node delete
Virtual IP address, and virtual IP address is floated to new host node.Specifically, in Redis high-availability systems provided by the embodiments of the present application
Host node and from node handoff procedure schematic diagram referring to Fig. 6.For example, the IP of monitoring node is 192.168.0.1, main Redis (claims
For R1) and from Redis nodes (be known as R2) same Redis environment, the management of main Redis and monitoring node communication are installed respectively
IP is 192.168.0.2, and the management IP communicated from Redis and monitoring node is 192.168.0.3, externally provides the virtual of service
IP (VIP) is 192.168.1.100, and port numbers (port) are 6000；Original state is that VIP can be configured to master by monitoring node
On the network interface card of Redis nodes, i.e., client connects Redis by 192.168.1.100 and port 6000 and accesses service；Work as monitoring
After monitoring nodes to host node R1 abnormal states, it will be promoted to new host node from node R 2, VIP is solved from former host node R1
Binding, reconfigures on new host node R2, continues externally to provide service.
In the embodiment of the present application, the handover module, including node bring back to life submodule, for bringing back to life the abnormal main section of original
Point, the former host node brought back to life becomes new slave node, and is connected to new host node.For example, former host node is R1, it is former from node
For R2, after carrying out a master-slave swap, R2 becomes new host node, and R1 becomes new slave node after being brought back to life.It is described to bring back to life
Abnormal former host node, specifically includes following processing：
Judge that former host node Redis processes whether there is；
If so, executing kill terminates former host node Redis processes, former host node data are emptied；The former main section of restarting
Redis processes on point, are set to new from node, and synchrodata is asked to new host node.
For example, after the completion of the Redis process initiations of new slave node, SYNC orders (i.e. synch command), host node are sent
BGSAVE orders are executed by data persistence to disk after receiving the order and record performed write order, which executes
To the write order for sending snapshot document from node and being recorded after finishing；Receive snapshot document from node, be loaded into receive it is fast
According to execution carrys out the write order recorded above of autonomous node and synchronized to complete full dose；After completion full dose synchronizes, new main section
Keep data consistent by increment synchronization between point and new slave node.
In the embodiment of the present application, the monitoring node 102 further includes from node failure processing module, for carrying out from section
The abnormality processing of point, i.e.,：When the operating status of the host node is normal condition, and the operating status from node
For abnormality, then termination is described from node processes, and restarts described from node processes.It is specific to bring back to life under operation includes
State processing：
It is described from node processes to execute kill orders termination；
It empties described from node perdurable data；
From node processes described in starting, the host node belonging to it is specified；
The host node data full dose is synchronized to described from node.
Database Systems provided by the embodiments of the present application detect the operating status of each Redis nodes, as main Redis automatically
It when node breaks down, automatically switches to from Redis nodes, continues to provide service to client, avoid the event of single machine Redis
Hinder risk, ensure that the high availability of system.
Based on a kind of embodiment of Database Systems provided by the present application, present invention also provides one kind being used for data
The embodiment of the monitoring method of library system.
Below in conjunction with fig. 4 to fig. 6, the monitoring method provided by the embodiments of the present application for Database Systems is said
It is bright.Wherein, Fig. 4 is a kind of process chart of monitoring method for Database Systems provided by the embodiments of the present application；Fig. 5 is
The Redis high-availability system structural schematic diagrams of monitoring method of the deployment provided by the embodiments of the present application for Database Systems；Fig. 6
It is Redis high-availability systems master-slave swap process schematic provided by the embodiments of the present application.
Since the present embodiment is based on above-described embodiment, so describing fairly simple, relevant part refers to
State the corresponding explanation of embodiment.
Monitoring method shown in Fig. 4 for Database Systems, including：Step S401 to step S403.
Step S401 sends sense command to monitored node group.
For promoted response speed, website general cache high concurrent hot spot data rather than directly from back-end data base read,
Redis as one based on memory can also persistence Key-Value databases, be a kind of common cache tools, build
It is extremely important that High Availabitity Redis systems stays provide service.Monitoring side provided by the embodiments of the present application for Database Systems
Method disposes configuration diagram referring to Fig. 2, including：Monitored node group and monitoring node；Wherein, state monitored node group, be by
Two monitored nodes composition with master-slave back-up relationship of Redis databases is run, one is host node, and another is from section
Point, host node and keeps heartbeat detection synchronouss with data between node, and host node really externally provides service, and from node work
Server node for backup, two operation Redis is also Redis nodes；The monitoring node is third operation monitoring work
The server node of tool, is specifically write using shell, and big multiserver, good compatibility can be directly run on；As main Redis
When node failure, new host node will be promoted to from Redis nodes automatically, and the main Redis nodes of original of failure are brought back to life, ensured
Entire Database Systems persistently provide service, ensure high availability, and under this mode, and data do not need fragment when being written,
Secondary orientation problem is not present when therefore reading data.It should be noted that in actual deployment, monitoring tools can monitor more simultaneously
Group principal and subordinate's Redis nodes, the i.e. quantity of monitored node group can be more than 1.
The master-slave back-up relationship refers to keeping main Redis nodes synchronous with from Redis nodes, for example, same configuration
Redis environment is synchronized to from the Redis node initializing stages by the data full dose on main Redis nodes from Redis nodes,
And increment synchronization is carried out after starting normal work, the write operation of main Redis nodes will be synchronized to from Redis nodes, be kept
Host node is synchronous with from node data.In the embodiment of the present application, it is to pass through synchronization after connecting host node from node that full dose, which synchronizes,
SYNC is ordered to replicate the total data of host node；The process of increment synchronization is that host node often executes a write order, at the same to from
Node sends identical write order, and the write order received is received and executed from node, all to the database manipulation to host node
It is automatically applied to, from node database, keep the data in two databases consistent.
In the embodiment of the present application, the monitored node group externally provides the mode of service, is provided by virtual IP address
Service, i.e., client is communicated by the host node in virtual IP address and monitored node group, interactive information.Specifically, for
The case where monitoring a monitored node group at least needs to plan that three IP address, including two management IP and one externally provide
The virtual IP address of service connection client, i.e., the host node of the described monitored node group and from node have been respectively configured for connecting
The management IP of monitoring receives the sense command, and return command implementing result by management IP；The monitoring node passes through
These management IP is communicated with monitored node, transmitting order to lower levels；And the communication of client and monitored node group is to pass through void
Quasi- IP carries out socket communications.The virtual IP address (or VIP, i.e. Virtual IP), be one not with certain computer (or service
Device) or a computer (or server) in network interface card (or NIC, i.e. Network Interface Card) it is connected
IP address, data packet is sent to this address VIP, but all data are still forwarded by true network interface；VIP
It is chiefly used in connecting redundancy, for example, an address VIP transfers to another optional calculating when a computer or NIC break down
Machine or NIC can still respond connection.By host node and from node duoble computer disaster-tolerance, service externally is provided using virtual IP address, is avoided
Single machine failure risk still can keep externally servicing when a node breaks down, and improve the available of whole system
Property.
The purpose of this step is to send sense command to each monitored node of monitored node group.Specific to the application
In embodiment, the monitoring node issues inspection to host node and from node respectively by host node and from the respective management IP of node
Order is surveyed, host node and the state from node are detected.Preferably, it is sent and is examined to monitored node group according to long periodicity when setting
Survey order.Wherein, the sense command is to write data command or reading data command.For example, every five seconds for example is to host node and from node
It sends a key fixed to one and writes 123456 data；It specifically can be with save value 123456, every five seconds for example alternatively, having prestored
Read the corresponding values of the key.
Step S402 receives command execution results, is determined in monitored node group and supervised according to the command execution results
Control the operating status of node.
The purpose of this step is to determine the operating status of each monitored node in monitored node group.
In the embodiment of the present application, the operation of monitored node in monitored node group is determined according to the command execution results
State, these orders refer to the sense command issued in step S401, and specific condition adjudgement operation includes：
If write data order return runs succeeded, judge the operating status of monitored node for normal condition；It is no
Then, the operating status of monitored node is abnormality；Alternatively,
If the reading data command return runs succeeded, and read-out result is used for condition adjudgement with what is be previously written
Fixed data it is consistent, then judge the operating status of monitored node for normal condition；Otherwise, the operating status of monitored node
For abnormality.
If for example, judging state by write operation, 123456 are respectively written into main Redis nodes and from Redis nodes,
KEY is key0, if the orders of SET key0 123456 return successfully, then it is assumed that operating status is normal；If judging shape by read operation
State, main Redis nodes and has been previously written 123456, KEY key0 from Redis nodes, if GET key0 orders return
123456, then it is assumed that operating status is normal.
In addition, the operating status that monitored node in monitored node group is determined according to the command execution results it
Afterwards, monitoring node also carries out following processing：
If monitored node is host node, judge to whether there is VIP on the host node；If it is not, then giving the host node
VIP is set.
In the embodiment of the present application, the monitoring node carries out aforesaid operations, the monitoring work by the monitoring tools of its operation
Tool is write using shell.
Step S403, is based on the operating status, and control monitored node switches over.
The purpose of this step is that control monitored node carries out master-slave swap, and the node for ensureing externally to provide service is fortune
The normal node of row state.
In the embodiment of the present application, the master-slave swap process of monitored node includes following processing：
Judge the operating status of the host node for abnormality, and it is described from the operating status of node be normal shape
State；It is then promoted to new host node from node by described, deletes virtual IP address from former host node, and virtual IP address is floated to new master
Node.Specifically, in Redis high-availability systems provided by the embodiments of the present application host node and from node handoff procedure schematic diagram join
See Fig. 6.For example, the IP of monitoring node is 192.168.0.1, main Redis (being known as R1) and from Redis nodes (being known as R2) respectively
Same Redis environment is installed, the management IP that main Redis and monitoring node communicate is 192.168.0.2, from Redis and monitoring
The management IP of node communication is 192.168.0.3, and the virtual IP address (VIP) for externally providing service is 192.168.1.100, port numbers
(port) it is 6000；Original state is that VIP can be configured on the network interface card of main Redis nodes by monitoring node, i.e., client passes through
192.168.1.100 connecting Redis with port 6000 accesses service；After monitoring monitoring nodes to host node R1 abnormal states,
It will be promoted to new host node from node R 2, VIP is solved binding from former host node R1, reconfigured on new host node R2,
Continue externally to provide service.
Preferably, after completing master-slave swap, the former host node for occurring abnormal is carried out bringing back to life operation, is become newly after bringing back to life
From node.Continue above-mentioned example, former host node is R1, and original is R2 from node, and after carrying out a master-slave swap, R2 becomes new
Host node, and R1 becomes new slave node after being brought back to life.Wherein, described to bring back to life operation and specifically include following processing：
Judge that former host node Redis processes whether there is；
If so, executing kill terminates former host node Redis processes, former host node data are emptied；The former main section of restarting
Redis processes on point, are set to new from node, ask data full dose being synchronized to new host node new from section
Point.
Specific to the embodiment of the present application, after the completion of the Redis process initiations of new slave node, SYNC orders are sent (i.e. together
Step command), host node executes BGSAVE orders by data persistence to disk after receiving the order and records performed write
Order, the order to from node send snapshot document and the write order that is recorded after being finished；Snapshot text is received from node
Part is loaded into the snapshot received, executes and carrys out the write order recorded above of autonomous node to complete full dose synchronization；Complete full dose
After synchronizing, keep data consistent by increment synchronization between new host node and new slave node.
In addition, in the embodiment of the present application, the monitoring node records each monitored node by the monitoring tools run
The relevant informations such as running log information, such as memory, CPU, disk, process status, the analysis data as Operation and Maintenance.
In the embodiment of the present application, the monitoring node passes through the monitoring tools that are run, moreover it is possible to drift about and carry out to virtual IP address
Control, and to carrying out recovery processing from node abnormality.For example, when former host node exception-triggered master-slave swap and to original
After host node is brought back to life, by monitoring tools and monitored node log analysis, it is still desirable to keep former host node continue at
To provide the host node of service, former host node is suspended to as new slave node on new host node after being brought back to life at this time, then is led to
Cross a series of status checkouts of monitoring tools progress (i.e. new from node) to former host node and attended operation of the monitoring node
Determine that the node software environment restores normal with hardware state afterwards, pressure resets to former host node (i.e. new from node) new
Virtual IP address is floated to the node by host node from original from node (i.e. new host node), and by original from node reset to it is new from
Node.Described refers to after monitoring nodal test to from node exception, to exception to carrying out recovery processing from node abnormality
Slave node also carry out bringing back to life operation, i.e.,：If the operating status of the host node is normal condition, and the fortune from node
Row state is abnormality, then termination is described from node processes, and is restarted described from node processes.Wherein, it specifically brings back to life
Operation includes following processing：
It is described from node processes to execute kill orders termination；
It empties described from node perdurable data；
From node processes described in starting, the host node belonging to it is specified；
The host node data full dose is synchronized to described from node.
Corresponding with the embodiment of a kind of monitoring method for Database Systems provided by the present application, the application also provides
A kind of monitoring device for Database Systems.
With reference to Fig. 7, it illustrates according to a kind of monitoring device schematic diagram for Database Systems provided by the present application.By
It is substantially similar to embodiment of the method in device embodiment, so describing fairly simple, relevant part refers to method implementation
The corresponding explanation of example.Device embodiment described below is only schematical.
The application provides a kind of monitoring device for Database Systems, including：
Detection unit 701, for sending sense command to monitored node group；
Status determining unit 702 determines monitored section for receiving command execution results according to the command execution results
The operating status of monitored node in point group；
Switch unit 703, for being based on the operating status, control monitored node switches over.
Optionally, the monitored node group is two quilts with master-slave back-up relationship by running Redis databases
Node composition is monitored, one is host node, and another is to keep heartbeat detection and data same from node, host node and between node
Step.
Optionally, the inspection unit 701, including cycle detection submodule, for according to long periodicity when setting to quilt
It monitors node group and sends sense command.
Optionally, the host node and described from node has been respectively configured for connect the management IP monitored, has passed through the pipe
It manages IP and receives the sense command, and return command implementing result.
Optionally, the sense command is to write data command or reading data command.
Optionally, the status determining unit 702, including judgment sub-unit, it is monitored for being judged by following manner
The operating status of node, including：
If write data order return runs succeeded, judge the operating status of monitored node for normal condition；It is no
Then, the operating status of monitored node is abnormality；Alternatively,
If the reading data command return runs succeeded, and read-out result is used for condition adjudgement with what is be previously written
Fixed data it is consistent, then judge the operating status of monitored node for normal condition；Otherwise, the operating status of monitored node
For abnormality.
Optionally, the switch unit 703, including subelement is handled from node failure, for carrying out following processing：
If the operating status of the host node be normal condition, and it is described from the operating status of node be abnormality,
From node processes described in then terminating, and restart described from node processes.
Optionally, described to handle subelement from node failure, specifically carry out following processing：
It is described from node processes to execute kill orders termination；
It empties described from node perdurable data；
From node processes described in starting, the host node belonging to it is specified；
The host node data full dose is synchronized to described from node.
Optionally, the monitored node group externally provides the mode of service, is to provide service by virtual IP address.
Optionally, the switch unit 703, including from liter boss's unit, for carrying out following processing：
Judge the operating status of the host node for abnormality, and it is described from the operating status of node be normal shape
State；It is then promoted to new host node from node by described, deletes virtual IP address from former host node, and virtual IP address is floated to new master
Node.
Optionally, the switch unit 703, including subelement is brought back to life, for carrying out following processing：
Judge that former host node Redis processes whether there is；
If so, executing kill terminates former host node Redis processes, former host node data are emptied；The former main section of restarting
Redis processes on point, are set to new from node, ask data full dose being synchronized to new host node new from section
Point.
Optionally, the switch unit 703, including virtual IP address manage subelement, for executing knot according to the order
Fruit determines in monitored node group after the operating status of monitored node, carries out following processing：
If monitored node is host node, judge to whether there is VIP on the host node；If it is not, then giving the host node
VIP is set.
Optionally, the monitored node group, quantity are more than 1.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
1, computer-readable medium can be by any side including permanent and non-permanent, removable and non-removable media
Method or technology realize information storage.Information can be computer-readable instruction, data structure, the module of program or other numbers
According to.The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM
(SRAM), dynamic random access memory (DRAM), other kinds of random access memory (RAM), read-only memory
(ROM), electrically erasable programmable read-only memory (EEPROM), fast flash memory bank or other memory techniques, CD-ROM are read-only
Memory (CD-ROM), digital versatile disc (DVD) or other optical storages, magnetic tape cassette, tape magnetic disk storage or
Other magnetic storage apparatus or any other non-transmission medium can be used for storage and can be accessed by a computing device information.According to
Herein defines, and computer-readable medium does not include non-temporary computer readable media (transitory media), is such as modulated
Data-signal and carrier wave.
2, it will be understood by those skilled in the art that embodiments herein can be provided as method, system or computer program production
Product.Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application
Form.It can be used in the computer that one or more wherein includes computer usable program code moreover, the application can be used
The computer program product implemented on storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Form.
Although the application is disclosed as above with preferred embodiment, it is not for limiting the application, any this field skill
Art personnel are not departing from spirit and scope, can make possible variation and modification, therefore the guarantor of the application
Shield range should be subject to the range that the application claim defined.
Claims (10)
1. a kind of Database Systems, which is characterized in that including：Monitored node group, monitoring node；Wherein,
Monitored node group receives monitoring section for externally providing service by the monitored node with master-slave back-up relationship
The condition monitoring of point and switching control；
Node is monitored, the operating status for obtaining monitored node in the monitored node group is based on the operating status,
Control monitored node switches over.
2. Database Systems according to claim 1, which is characterized in that the monitored node group is by running Redis
Two monitored nodes composition with master-slave back-up relationship of database, one is host node, another for from node, host node and
Keep heartbeat detection synchronous with data between node.
3. Database Systems according to claim 2, which is characterized in that the monitoring node, including detection module are used for
Sense command is sent to monitored node group according to long periodicity when setting, receives command execution results, is determined described monitored
The operating status of node.
4. Database Systems according to claim 3, which is characterized in that the sense command, be write data command or
Read data command.
5. Database Systems according to claim 4, which is characterized in that the monitoring node, including VIP management modules,
Virtual IP address for being arranged and managing the monitored node group；Wherein, the monitored node group is externally carried by virtual IP address
For service.
6. Database Systems according to claim 5, which is characterized in that the monitoring node, including handover module are used for
Master-slave swap, including following processing are carried out in the primary node status exception：
If the operating status of the host node be abnormality and it is described from the operating status of node be normal condition, by institute
It states and is promoted to new host node from node, delete virtual IP address from former host node, and virtual IP address is floated to new host node.
7. a kind of monitoring method for Database Systems, which is characterized in that including：
Sense command is sent to monitored node group；
Command execution results are received, the operation shape of monitored node in monitored node group is determined according to the command execution results
State；
Based on the operating status, control monitored node switches over.
8. the method according to the description of claim 7 is characterized in that the monitored node group, is by running Redis databases
Two monitored nodes composition with master-slave back-up relationship, one is host node, another for from node, host node and from node
Between keep heartbeat detection it is synchronous with data.
9. according to the method described in claim 8, it is characterized in that, the monitored node group, externally provides the side of service
Formula is to provide service by virtual IP address.
10. according to the method described in claim 9, it is characterized in that, described be based on the operating status, control monitored node
It switches over, including following processing：
Judge the operating status of the host node for abnormality, and it is described from the operating status of node be normal condition；Then
It is promoted to new host node from node by described, deletes virtual IP address from former host node, and virtual IP address is floated to new host node.
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