CN110034951A - The failure switching method and iSCSI major heading device of iscsi target device - Google Patents
The failure switching method and iSCSI major heading device of iscsi target device Download PDFInfo
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- CN110034951A CN110034951A CN201910168196.8A CN201910168196A CN110034951A CN 110034951 A CN110034951 A CN 110034951A CN 201910168196 A CN201910168196 A CN 201910168196A CN 110034951 A CN110034951 A CN 110034951A
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- 238000004590 computer program Methods 0.000 description 4
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Classifications
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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
- H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
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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
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
Abstract
This application provides a kind of failure switching method of iscsi target device and iSCSI major heading devices, belong to cloud storage/cluster-based storage field.ISCSI major heading device receives the RBD block device operation requests of iSCSI, and the destination address of operation requests is the virtual ip address of iscsi target device cluster；When iSCSI major heading device breaks down, iSCSI major heading device disconnects the connection with iSCSI alternate target device；RBD block device corresponding with iSCSI is exported according to the IP address of iSCSI as new iSCSI major heading device, exports as LUN and use to iSCSI by iSCSI alternate target device.To which iscsi target device externally has unified virtual ip address, in the event of a failure, can switch to any iSCSI alternate target device, simplify outward service process and fail-over scheme.
Description
Technical field
This application involves field of computer technology more particularly to a kind of Internet Small Computer Systems Interfaces
The failure switching method of (internet small computer system interface, iSCSI) object machine and iSCSI master
Object machine.
Background technique
Internet Small Computer Systems Interface (internet small computer system interface,
ISCSI) be a kind of agreement based on TCP/IP, for establish and manage IP storage equipment (iscsi target device (target)) and
Interconnection between client (iSCSI (initiator)) etc..The major function of iSCSI is in TCP/IP network
On client and storage equipment between carry out mass data encapsulation and reliable transmission process.
Ceph is a kind of Linux distributed file system.Ceph is in order to support several operation systems such as VMWare
EXSi, windows etc. are general to be realized using docking iSCSI.Ceph is distributed memory system, so needing to realize more
Scheme of the iSCSI initiator to more iSCSI target.Existing some schemes need iSCSI initiator while connecting
Meet multiple iSCSI target, the case where iSCSI target is likely to occur delay machine, multiple iSCSI initiator with it is multiple
ISCSI target connection, failover can be more troublesome.
Summary of the invention
The application provides the failure switching method and iSCSI major heading device of a kind of iscsi target device, in distributed storage
In system, when iSCSI major heading device breaks down, the spare mesh of any iSCSI in iscsi target device cluster can be switched to
It marks on device.
In a first aspect, providing a kind of failure switching method of iscsi target device, iscsi target device cluster includes one
ISCSI major heading device and one or more iSCSI alternate target device, the iSCSI cluster connection one or more RBD block are set
It is standby, which comprises
The iSCSI major heading device receives the RBD block device operation requests from iSCSI, the operation requests
Source address be the iSCSI IP address, destination address be the iscsi target device cluster virtual ip address；
When the iSCSI major heading device breaks down, the iSCSI major heading device selection is one or more of
One of iSCSI alternate target device in iSCSI alternate target device is as new iSCSI major heading device, according to the iSCSI
The RBD block device operation requests are sent to described by the virtual ip address of the IP address of starter and the iscsi target device
New iSCSI major heading device responds the operation requests by the new iSCSI major heading device, and the operation requests are corresponding
RBD block device export as logical unit number LUN and used to the iSCSI.
Optionally, each iscsi target device in the iscsi target device cluster includes the first network interface and the second network interface,
First network interface is connect for establishing heartbeat with other iscsi target devices in the iscsi target device cluster, and described second
Network interface with the iSCSI for carrying out data transmission.
Optionally, described when the iSCSI major heading device breaks down, the iSCSI major heading device disconnect with it is described
The connection of one or more iSCSI alternate target devices, comprising:
When the iSCSI major heading device breaks down, the first network interface of the iSCSI major heading device is disconnected and described one
The connection of first network interface of a or multiple iSCSI alternate target devices.
Optionally, described that the operation requests are responded by new iSCSI major heading device, the operation requests are corresponding
RBD block device is exported as logical unit number LUN and is used to the iSCSI, comprising:
The operation requests are responded by the second network interface by the new iSCSI major heading device, by the derived RBD block
Equipment is exported as logical unit number LUN and is used to the iSCSI.
Optionally, the method also includes:
It is corresponding with one or more RBD block device that the iSCSI major heading device establishes one or more iSCSIs
Relationship.
Second aspect provides a kind of iSCSI major heading device, and iscsi target device cluster, which has, to be realized in the above method
The function of iscsi target device Aggregation behaviour.The function can also be executed corresponding soft by hardware realization by hardware
Part is realized.The hardware or software include one or more modules corresponding with above-mentioned function.
Wherein, the iscsi target device cluster includes: an iSCSI major heading device and the spare mesh of one or more iSCSI
Device is marked, the iSCSI cluster connects one or more RBD block device, in which:
The iSCSI major heading device is for receiving the RBD block device operation requests from iSCSI, the operation
The source address of request is the IP address of the iSCSI, and destination address is the virtual IP address of the iscsi target device cluster
Location；
The iSCSI major heading device is also used to when the iSCSI major heading device breaks down, and is selected one or more
One of iSCSI alternate target device in a iSCSI alternate target device is as new iSCSI major heading device, according to described
The virtual ip address of the IP address of iSCSI and the iscsi target device sends the RBD block device operation requests
To the new iSCSI major heading device, the operation requests are responded by the new iSCSI major heading device, the operation is asked
It asks corresponding RBD block device to export as logical unit number LUN to use to the iSCSI.
Optionally, each iscsi target device in the iscsi target device cluster includes the first network interface and the second network interface,
First network interface is connect for establishing heartbeat with other iscsi target devices in the iscsi target device cluster, and described second
Network interface with the iSCSI for carrying out data transmission.
Optionally, the iSCSI major heading device is also used to when the iSCSI major heading device breaks down, will be described
First network interface of iSCSI major heading device disconnects the connection with the first network interface of one or more of iSCSI alternate target devices.
Optionally, the operation requests are responded by the second network interface by new iSCSI major heading device, it will be described derived
RBD block device is exported as logical unit number LUN and is used to the iSCSI.
Optionally, the iSCSI major heading device is also used to establish one or more iSCSIs and one or more
The corresponding relationship of RBD block device.
Conceived based on same application, the principle and beneficial effect solved the problems, such as due to the iSCSI major heading device can join
See the method implementation and brought beneficial effect of above-mentioned each possible iSCSI major heading device, therefore the iSCSI argument
The implementation of mark device may refer to the implementation of method, and overlaps will not be repeated.
The third aspect provides a kind of computer readable storage medium, is stored in the computer readable storage medium
Instruction, when run on a computer, so that computer executes method described in above-mentioned first aspect.
The application's has the beneficial effect that
ISCSI major heading device receives the RBD block device operation requests of iSCSI, and the destination address of operation requests is
The virtual ip address of iscsi target device cluster；When iSCSI major heading device breaks down, iSCSI major heading device disconnect with
The connection of iSCSI alternate target device；ISCSI alternate target device is as new iSCSI major heading device, according to iSCSI
RBD block device corresponding with iSCSI is exported, exports as LUN and use to iSCSI by IP address.To,
Iscsi target device externally has unified virtual ip address, in the event of a failure, can switch to any iSCSI alternate target
Device simplifies outward service process and fail-over scheme.
Detailed description of the invention
Fig. 1 is the system architecture diagram of iSCSI provided by the embodiments of the present application and iscsi target device cluster；
Fig. 2 is the schematic diagram of internal structure of iscsi target device cluster provided by the embodiments of the present application；
Fig. 3 is a kind of flow diagram of the failure switching method of iscsi target device provided by the embodiments of the present application；
Fig. 4 is the flow diagram of the failure switching method of another iscsi target device provided by the embodiments of the present application.
Specific embodiment
The embodiment of the present application is described below with reference to the attached drawing in the embodiment of the present application.
In the embodiment of the present application, " multiple " refer to two or more, in consideration of it, can also be in the embodiment of the present application
" multiple " are interpreted as " at least two "."and/or" describes the incidence relation of affiliated partner, indicates may exist three kinds of relationships,
For example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, character
"/" typicallys represent the relationship that forward-backward correlation object is a kind of "or" unless otherwise specified.
Referring to Fig. 1, being the system architecture of iSCSI provided by the embodiments of the present application and iscsi target device cluster
Figure.The system includes one or more iSCSIs, and example includes n iSCSI as shown in figure 1.The system further includes
Iscsi target device cluster, the iscsi target device cluster include an iSCSI major heading device and one or more iSCSI spare
Object machine.Iscsi target device cluster has unified virtual ip address.The iscsi target device cluster is connect with Ceph cluster, should
Ceph cluster provides one or more RBD block device.
Referring to Fig. 2, being the schematic diagram of internal structure of iscsi target device cluster provided by the embodiments of the present application.Such as Fig. 2 institute
Show, which includes an iSCSI major heading device and m iSCSI alternate target device.Each iscsi target device
With the first network interface and the second network interface.Wherein, first network interface be used for it is other in the iscsi target device cluster
Iscsi target device establishes heartbeat connection, and second network interface with the iSCSI for carrying out data transmission.
The embodiment of the present application provides the failure switching method and iscsi target device cluster of a kind of iscsi target device, iSCSI
Object machine externally has unified virtual ip address, in the event of a failure, can switch to any iSCSI alternate target device, letter
Outward service process and fail-over scheme are changed.
Referring to Fig. 3, for a kind of process signal of the failure switching method of iscsi target device provided by the embodiments of the present application
Figure, iscsi target device cluster include an iSCSI major heading device and one or more iSCSI alternate target device, the iSCSI
Cluster connects one or more RBD block device.Wherein:
S101, the iSCSI major heading device receive the RBD block device operation requests from iSCSI.
The application can be applied to distributed memory system.For example, Ceph is distributed memory system, need to realize multiple
Scheme of the iSCSI to multiple iscsi target devices.
When any one iSCSI want to RBD block device carry out when reading or writing of data, iSCSI to
ISCSI major heading device sends RBD block device operation requests.The operation requests include source address and destination address.Wherein, the operation
The source address of request is the IP address of the iSCSI.In the present embodiment, iscsi target device cluster externally has unification
Virtual ip address, all iSCSIs only need to connect this virtual IP address i.e. may have access to, therefore, the operation
The destination address of request is the virtual ip address of the iscsi target device cluster.
The virtual ip address default setting is on main iscsi target device, then iSCSI major heading device receives any iSCSI and opens
The RBD block device operation requests that dynamic device is sent.
S102, when the iSCSI major heading device breaks down, select one or more of iSCSI alternate target devices
In one of iSCSI alternate target device as new iSCSI major heading device, according to the IP address of the iSCSI
With the virtual ip address of the iscsi target device, the RBD block device operation requests are sent to the new iSCSI argument
Device is marked, the operation requests are responded by the new iSCSI major heading device, the corresponding RBD block device of the operation requests is made
It exports for logical unit number and is used to the iSCSI.
One of iSCSI alternate target device in cluster replaces the iSCSI major heading device to break down, as new
ISCSI major heading device.The iSCSI alternate target device can be any one iSCSI alternate target device in cluster, or by setting
The iSCSI alternate target device that set pattern then determines.
Each iSCSI need to be mapped with specific RBD block device, and iSCSI connects iSCSI cluster
When, it is desirable to only return to the RBD block device of oneself mapping.Start in the specific implementation, new iSCSI major heading device is established with iSCSI
The service connection of device, and according to the IP address of iSCSI, determine RBD block device corresponding with the iSCSI, it will
It is local that RBD block device corresponding with the iSCSI in Ceph cluster exports to new iSCSI major heading device.
New iSCSI major heading device response aforesaid operations request, using derived RBD block device as logical unit number
(logic unit number, LUN) export is used to iSCSI, and iSCSI is just as access local disk one
Sample can carry out reading and writing data to RBD block device according to iSCSI protocol.The data of read-write are placed in iSCSI packet, are then issued to
ISCSI major heading device, the internal processes of iscsi target device cluster be one unpacking process, according to iSCSI protocol into
Row.
Optionally, when former iSCSI major heading device detects itself fail, former iSCSI major heading device disconnects and collection
The connection of each iSCSI alternate target device in group.
A kind of failure switching method of iscsi target device is provided according to the embodiment of the present application, iscsi target device externally has
Unified virtual ip address can switch to any iSCSI alternate target device, simplify outward service stream in the event of a failure
Journey and fail-over scheme.
Referring to Fig. 4, the process for the failure switching method of another iscsi target device provided by the embodiments of the present application is shown
It is intended to, iscsi target device cluster includes an iSCSI major heading device and one or more iSCSI alternate target device, described
ISCSI cluster connects one or more RBD block device.Wherein:
S201, the iSCSI major heading device establish one or more iSCSIs and one or more RBD block device
Corresponding relationship.
Each iSCSI need to be mapped with specific RBD block device, and iSCSI connects iSCSI cluster
When, it is desirable to only return to the RBD block device of oneself mapping.Firstly, iSCSI major heading device establishes one or more iSCSIs
With the corresponding relationship of one or more RBD block devices, and the corresponding relationship is stored.
S202, the iSCSI major heading device receive the RBD block device operation requests from iSCSI, the operation
The source address of request is the IP address of the iSCSI, and destination address is the virtual IP address of the iscsi target device cluster
Location.
When any one iSCSI want to RBD block device carry out when reading or writing of data, iSCSI to
ISCSI major heading device sends RBD block device operation requests.The operation requests include source address and destination address.Wherein, the operation
The source address of request is the IP address of the iSCSI.In the present embodiment, iscsi target device cluster externally has unification
Virtual ip address, all iSCSIs only need to connect this virtual IP address i.e. may have access to, therefore, the operation
The destination address of request is the virtual ip address of the iscsi target device cluster.
The virtual ip address default setting is on main iscsi target device, then iSCSI major heading device receives any iSCSI and opens
The RBD block device operation requests that dynamic device is sent.
S203, the iSCSI major heading device select one of them in one or more of iSCSI alternate target devices
ISCSI alternate target device is as new iSCSI major heading device, according to the IP address of the iSCSI and the iSCSI mesh
The RBD block device operation requests are sent to the new iSCSI major heading device by the virtual ip address for marking device, by described new
ISCSI major heading device the operation requests are responded by the second network interface, using the RBD block device of the operation requests as logic
Unit number is exported to be used to the iSCSI.
One of iSCSI alternate target device in cluster replaces the iSCSI major heading device to break down, as new
ISCSI major heading device.The iSCSI alternate target device can be any one iSCSI alternate target device in cluster, or by setting
The iSCSI alternate target device that set pattern then determines.
Each iSCSI need to be mapped with specific RBD block device, and iSCSI connects iSCSI cluster
When, it is desirable to only return to the RBD block device of oneself mapping.Start in the specific implementation, new iSCSI major heading device is established with iSCSI
The service connection of device, and according to the IP address of iSCSI, determine RBD block device corresponding with the iSCSI, it will
It is local that RBD block device corresponding with the iSCSI in Ceph cluster exports to new iSCSI major heading device.
New iSCSI major heading device responds aforesaid operations request by the second network interface, using derived RBD block device as patrolling
Volume unit number is exported to be used to iSCSI, and iSCSI is the same just as access local disk, can be according to iSCSI
Agreement carries out reading and writing data to RBD block device.The data of read-write are placed in iSCSI packet, are then issued to iSCSI major heading device,
The internal processes of iscsi target device cluster are the processes of a unpacking, are carried out according to iSCSI protocol.
Optionally, when former iSCSI major heading device breaks down, the first network interface of former iSCSI major heading device disconnects and institute
State the connection of the first network interface of one or more iSCSI alternate target devices.
As shown in Fig. 2, each iscsi target device in iscsi target device cluster includes the first network interface and the second network interface, the
One network interface connect for establishing heartbeat with other iscsi target devices in iscsi target device cluster, the second network interface for
ISCSI carries out data transmission.When former iSCSI major heading device breaks down, the first network interface of former iSCSI major heading device
The connection with the first network interface of one or more iSCSI alternate target device is disconnected, such iSCSI alternate target device does not just receive
Heartbeat from iSCSI major heading device, so that it is determined that failure has occurred in original iSCSI major heading device.
A kind of failure switching method of iscsi target device is provided according to the embodiment of the present application, iscsi target device externally has
Unified virtual ip address can switch to any iSCSI alternate target device, simplify outward service stream in the event of a failure
Journey and fail-over scheme.
Please continue to refer to the schematic diagram of internal structure of iscsi target device cluster provided by the embodiments of the present application shown in Fig. 2,
The iscsi target device cluster includes an iSCSI major heading device and one or more iSCSI alternate target device, the iSCSI cluster
Connect one or more RBD block device, in which:
ISCSI major heading device is for receiving the RBD block device operation requests from iSCSI, the source of operation requests
Address is the IP address of iSCSI, and destination address is the virtual ip address of iscsi target device cluster；
ISCSI major heading device is also used to when iSCSI major heading device breaks down, and selects one or more iSCSI spare
One of iSCSI alternate target device in object machine is as new iSCSI major heading device, according to the IP of iSCSI
The RBD block device operation requests are sent to new iSCSI major heading device by the virtual ip address of location and iscsi target device, by
The new iSCSI major heading device responds operation requests, exports using derived RBD block device as logical unit number to iSCSI
It uses.
In one implementation, each iscsi target device in iscsi target device cluster includes the first network interface and second
Network interface, the first network interface are connect for establishing heartbeat with other iscsi target devices in iscsi target device cluster, and the second network interface is used
Carry out data transmission in iSCSI.
In another implementation, iSCSI major heading device is also used to when iSCSI major heading device breaks down, will
First network interface of iSCSI major heading device disconnects the connection with the first network interface of one or more iSCSI alternate target device.
In another implementation, iSCSI major heading device is also used to establish one or more iSCSIs and one
Or the corresponding relationship of multiple RBD block devices.
In another implementation, operation requests are responded by the second network interface by new iSCSI major heading device, will be exported
RBD block device export as logical unit number LUN and used to iSCSI.
A kind of iSCSI major heading device is provided according to the embodiment of the present application, iscsi target device externally has unified virtual IP address
Address can switch to any iSCSI alternate target device, simplify outward service process and failover in the event of a failure
Mechanism.
The embodiment of the present application also provides a kind of computer readable storage medium, deposited in the computer readable storage medium
Instruction is contained, when run on a computer, so that computer executes the method in above-described embodiment.
The embodiment of the present application also provides a kind of computer program products comprising instruction, when it runs on computers
When, so that computer executes the method in above-described embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.For example, the division of the unit, only a kind of logical function partition, can have in actual implementation
Other division mode, for example, multiple units or components can be combined or can be integrated into another system or some features
It can ignore, or not execute.Shown or discussed mutual coupling or direct-coupling or communication connection can be logical
Some interfaces are crossed, the indirect coupling or communication connection of device or unit can be electrical property, mechanical or other forms.
Unit may or may not be physically separated as illustrated by the separation member, shown as a unit
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program produces
Product include one or more computer instructions.It is all or part of when loading and execute on computers the computer program instructions
Ground generates the process or function according to the embodiment of the present application.The computer can be general purpose computer, special purpose computer, computer
Network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or by being somebody's turn to do
Computer readable storage medium is transmitted.The computer instruction can be from a web-site, computer, server or data
Center passes through wired (such as coaxial cable, optical fiber, Digital Subscriber Line (digital subscriber line, DSL)) or wireless
(such as infrared, wireless, microwave etc.) mode is transmitted to another web-site, computer, server or data center.It should
Computer readable storage medium can be any usable medium that computer can access or include one or more available
The data storage devices such as medium integrated server, data center.The usable medium can be read-only memory (read-only
Memory, ROM) or random access memory (random access memory, RAM) or magnetic medium, for example, floppy disk,
Hard disk, tape, magnetic disk or optical medium, for example, digital versatile disc (digital versatile disc, DVD) or half
Conductive medium, for example, solid state hard disk (solid state disk, SSD) etc..
Claims (10)
1. a kind of failure switching method of iscsi target device, which is characterized in that be applied to iSCSI major heading device, iscsi target
Device cluster includes an iSCSI major heading device and one or more iSCSI alternate target device, and the iSCSI cluster connects one
Or multiple RBD block devices, which comprises
The iSCSI major heading device receives the RBD block device operation requests from iSCSI, the source of the operation requests
Address is the IP address of the iSCSI, and destination address is the virtual ip address of the iscsi target device cluster；
When the iSCSI major heading device breaks down, the iSCSI major heading device selects one or more of iSCSI standby
Use one of iSCSI alternate target device in object machine as new iSCSI major heading device, according to the iSCSI
IP address and the iscsi target device virtual ip address, the RBD block device operation requests are sent to described new
ISCSI major heading device responds the operation requests by the new iSCSI major heading device, by the corresponding RBD of the operation requests
Block device is exported as logical unit number LUN and is used to the iSCSI.
2. the method as described in claim 1, which is characterized in that each iscsi target device in the iscsi target device cluster
Including the first network interface and the second network interface, first network interface is used for and other iscsi targets in the iscsi target device cluster
Device establishes heartbeat connection, and second network interface with the iSCSI for carrying out data transmission.
3. method according to claim 2, which is characterized in that it is described when the iSCSI major heading device breaks down, it is described
ISCSI major heading device disconnects the connection with one or more of iSCSI alternate target devices, comprising:
When the iSCSI major heading device breaks down, the first network interface of the iSCSI major heading device disconnect with it is one or
The connection of first network interface of multiple iSCSI alternate target devices.
4. method according to claim 2, which is characterized in that described to be asked by the new iSCSI major heading device response operation
It asks, the corresponding RBD block device of the operation requests is exported as logical unit number LUN and is used to the iSCSI, comprising:
The operation requests are responded by the second network interface by new iSCSI major heading device, by the corresponding RBD block of the operation requests
Equipment is exported as logical unit number LUN and is used to the iSCSI.
5. such as the described in any item methods of Claims 1 to 4, which is characterized in that the method also includes:
The iSCSI major heading device establishes one or more iSCSIs pass corresponding with one or more RBD block device
System.
6. a kind of iSCSI major heading device, which is characterized in that iscsi target device cluster includes an iSCSI major heading device and one
Or multiple iSCSI alternate target devices, the iSCSI cluster connect one or more RBD block device, in which:
The iSCSI major heading device is for receiving the RBD block device operation requests from iSCSI, the operation requests
Source address be the iSCSI IP address, destination address be the iscsi target device cluster virtual ip address；
The iSCSI major heading device is also used to when the iSCSI major heading device breaks down, and is selected one or more of
One of iSCSI alternate target device in iSCSI alternate target device is as new iSCSI major heading device, according to the iSCSI
The RBD block device operation requests are sent to described by the virtual ip address of the IP address of starter and the iscsi target device
New iSCSI major heading device responds the operation requests by the new iSCSI major heading device, and the operation requests are corresponding
RBD block device export as logical unit number LUN and used to the iSCSI；
The iSCSI major heading device is also used to disconnect the connection with one or more of iSCSI alternate target devices.
7. iSCSI major heading device as claimed in claim 6, which is characterized in that each of described iscsi target device cluster
Iscsi target device includes the first network interface and the second network interface, and first network interface is used for and its in the iscsi target device cluster
Its iscsi target device establishes heartbeat connection, and second network interface with the iSCSI for carrying out data transmission.
8. iSCSI major heading device as claimed in claim 7, which is characterized in that the iSCSI major heading device is also used to when described
When iSCSI major heading device breaks down, by the first network interface of the iSCSI major heading device disconnect with it is one or more of
The connection of first network interface of iSCSI alternate target device.
9. such as the described in any item iSCSI major heading devices of claim 6~8, which is characterized in that the iSCSI major heading device is also
For establishing the corresponding relationship of one or more iSCSIs Yu one or more RBD block device.
10. a kind of computer readable storage medium, it is stored with instruction in the computer readable storage medium, when it is in computer
When upper operation, so that computer executes method as claimed in any one of claims 1 to 5.
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