CN111240901A - Node dynamic expansion system, method and equipment of distributed block storage system - Google Patents
Node dynamic expansion system, method and equipment of distributed block storage system Download PDFInfo
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Abstract
According to the node dynamic expansion system, the node dynamic expansion method and the node dynamic expansion equipment of the distributed block storage system, processing of high-availability services is added after data storage services, monitoring services and TGTD services of the distributed block storage system are expanded; namely, when the service IP is added, the high available service in the original distributed block storage system is not restarted, and only the high available service of the new extension node is started. The dynamic node expansion method of the distributed block storage system provided by the invention reduces the influence degree on customer service in the dynamic node expansion process, can meet the requirement of long-time fault-free operation of the distributed block storage system, and can also solve the problem of node fault after the node expansion of the storage system is finished.
Description
Technical Field
The invention relates to the technical field of storage systems, in particular to a node dynamic expansion system, a node dynamic expansion method and a node dynamic expansion device of a distributed block storage system.
Background
The distributed block storage system is widely applied to the fields of IT enterprises, cloud computing, big data, virtualization and the like, and meanwhile, the fields put forward higher and higher requirements on elastic expansion of storage space along with rapid business growth.
When the node expansion is performed in the existing distributed block storage system, only the data storage service (i.e. OSD service) of the node is automatically expanded, and the monitoring service (i.e. MON service), TGTD service, management software service and the like are not automatically expanded. According to the existing node expansion mode, the storage system can run without fault for a long time, but the client service scene is complex and changeable, the node fault happens occasionally, and the on-off operation of the client field storage node can be frequently used, so that the fault scene of the storage system after the node expansion must be met.
If the monitoring service, the TGTD service, the management software service and the like are not expanded along with the nodes, the newly expanded nodes cannot be timely discovered by the management software after the failure, which can cause the long-time degraded operation of the storage system; if the service IP running on a certain node of the storage system is in failure, the service IP is just shifted to a newly expanded node, and the client service is interrupted and exits due to the fact that the newly expanded node does not have TGTD service; a more serious case is when the number of monitoring service node failures of the storage system reaches half, which may result in the entire storage system being unusable even if the storage system does not exceed the redundancy rules.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a node dynamic expansion system, method and device for a distributed block storage system, which reduce the degree of influence on client services during the node dynamic expansion process, and can not only satisfy the long-time fault-free operation of the distributed block storage system, but also handle the problem of node failure after the node expansion of the storage system is completed.
In order to achieve the purpose, the invention is realized by the following technical scheme: a node dynamic expansion system of a distributed block storage system, comprising: the system comprises a monitoring service processing module, a data storage service processing module, a management software service processing module, a TGTD service processing module and a high-availability service processing module;
the monitoring service processing module is used for selecting different node expansion processes according to whether the expansion node is used as a monitoring service node or not, and acquiring the node where the main monitoring service is located according to the configuration file of the storage system;
the data storage service processing module is used for completing the capacity expansion of the main monitoring service and the data storage service by matching with the monitoring service processing module;
the management software service processing module is used for all nodes of the distributed block storage system to perform node operation through management software after node expansion and reporting through the management software when abnormality occurs in the distributed block storage system;
the TGTD service processing module is used for controlling nodes in the distributed block storage system to provide storage service; and the high-availability service processing module is used for restarting the TGTD service within a specific time when the TGTD service is abnormally exited.
Correspondingly, the invention also discloses a node dynamic expansion method of the distributed block storage system, which comprises the following steps:
s1: before expanding data storage service, determining whether a newly expanded node is used as a monitoring service node;
s2: the data storage log disk and the data storage cache are uniformly distributed to each solid state disk of the node by combining a data storage service processing module;
s3: expanding data storage service and monitoring service, and performing service expansion of management software after completion;
s4: after the management software service expansion is completed, the TGTD service processing module acquires a main monitoring service node according to the management software service module, synchronizes a TGTD service configuration file of the main monitoring service node to a newly expanded node, and then starts the TGTD service of the newly expanded node;
s5: after the TGTD service capacity expansion is completed, increasing the service IP through a high available service processing module;
s6: and determining the storage node allocated by the service IP by judging whether the service IP has read-write according to the TGTD service of the storage node.
Further, the step S1 specifically includes:
judging whether the newly expanded node is used as a monitoring service node, if so, selecting a certain solid state disk of the newly expanded node to divide a partition with a preset capacity to store monitoring service data; if not, executing the original node expansion process.
Further, the step S2 further includes:
the data storage log disk and the cache in the distributed block storage system are the same in quantity;
and the corresponding hard disk space is completely used for storing the mounting catalog of the corresponding data storage service.
Further, the step S3 specifically includes:
and reinstalling the management software service on the main monitoring service node, importing the log information of the backup distributed block storage system before expansion after the installation is finished, and then synchronizing the configuration file of the management software service of the main monitoring service node to the same position of all nodes of the distributed block storage system.
Further, the step S5 further includes:
the high available service in the original distributed block storage system is not restarted, and only the high available service of the new extension node is started.
Further, the step S6 specifically includes:
if the TGTD service of the current storage node has read-write, the corresponding service IP cannot be redistributed to the storage except the current storage node; and if no read-write is carried out on the TGTD service of the current storage node, the corresponding service IP is allowed to be distributed to other storage nodes.
Correspondingly, the invention also discloses a node dynamic expansion device of the distributed block storage system, which comprises:
a memory for storing a computer program;
a processor for implementing the method steps of the node dynamic expansion of the distributed block storage system as described in any one of the above when executing the computer program.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a node dynamic expansion system, a node dynamic expansion method and a node dynamic expansion device of a distributed block storage system, which modify the node dynamic expansion process of the distributed block storage system, not only automatically expand the data storage service of nodes, but also automatically expand the monitoring service, TGTD service and management software service of the nodes. In order to ensure that the node dynamic expansion of the distributed block storage system has no influence on customer service and can meet the requirement of high availability of the distributed block storage system after the node dynamic expansion, the processing of high availability service is added after the data storage service, the monitoring service and the TGTD service of the distributed block storage system are expanded; namely, when the service IP is added, the high available service in the original distributed block storage system is not restarted, and only the high available service of the new extension node is started. The dynamic node expansion method of the distributed block storage system provided by the invention reduces the influence degree on customer service in the dynamic node expansion process, can meet the requirement of long-time fault-free operation of the distributed block storage system, and can also solve the problem of node fault after the node expansion of the storage system is finished.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the architecture of the distributed fast storage system of the present invention.
Fig. 2 is a system configuration diagram according to a first embodiment of the present invention.
FIG. 3 is a flowchart of a method according to a second embodiment of the present invention.
Fig. 4 is a flowchart of a method according to a third embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
In a specific embodiment, the proprietary names used are the following chinese and english controls:
monitoring service: and the MON (Monitor) is responsible for monitoring the states of the storage system, including Monitor states and OSD states, and also responsible for maintaining state changes, and the number of MON in the distributed block storage system is usually an odd number.
The object storage device: osd (object Storage devices), i.e., object Storage devices, provide data Storage services.
TGTD: i.e., ISCSI target is a storage resource located on the ISCSI server that can be used to perform various storage related tasks.
Caching: the Cache is an intermediate layer introduced for making up the gap between the high-speed equipment and the low-speed equipment, and finally plays a role in accelerating the access speed.
Data storage log disk: OSD Journal.
Data storage and caching: and (4) OSD Cache.
Solid state disk: an SSD.
Mechanical hard disk: an HDD.
The node dynamic expansion system, the node dynamic expansion method and the node dynamic expansion equipment of the distributed block storage system are all based on the distributed block storage system, as shown in figure 1, the distributed block storage system equally divides the Journal and the Cache of the OSD to each SSD as much as possible according to the number of the SSDs and the HDDs (mainly realized by a remainder algorithm). The OSD's Journal is redirected to a partial partition of the SSD, typically with a partition size of 5G (e.g., sdb1-sdb5), and the space remaining in the SSD is again divided equally as an OSD Cache mount point (e.g., sdb6-sdb10) and a MON service mount point (sdb11), where the OSD's Cache and OSD Journal are in a 1:1 relationship. The monitoring service of the distributed block storage system selects the SSD with more left space after the OSD Journal is removed and then divides a 10GB partition as an MON service mounting point, and if the SSD spaces after the OSD Journal is removed are equal, the first SSD in the storage node is selected to divide a 10GB space as the MON service mounting point. In addition, the HDD disk full space serves as the on-load directory for the OSD.
The first embodiment is as follows:
as shown in fig. 2, the present invention discloses a node dynamic expansion system of a distributed block storage system, which includes: the system comprises a monitoring service processing module, a data storage service processing module, a management software service processing module, a TGTD service processing module and a high-availability service processing module.
And the monitoring service processing module is used for selecting different node expansion processes according to whether the expansion node is used as a monitoring service node or not and acquiring the node where the main MON service is located according to the configuration file of the storage system.
And the data storage service processing module is used for completing the capacity expansion of the main MON service and the OSD service in cooperation with the monitoring service processing module.
The management software service processing module is used for ensuring that all node operations of the distributed block storage system can be operated through the management software after the nodes are expanded, and reporting the node operations in time through the management software when the distributed block storage system is abnormal;
and the TGTD service processing module is used for controlling the nodes in the distributed block storage system to provide storage service.
And the high-availability service processing module is used for reducing the influence of node faults of the distributed block storage system on customer services, and when the TGTD service exits abnormally, the high-availability service restarts the TGTD service within a specific time.
Example two:
correspondingly, as shown in fig. 3, the present invention also discloses a node dynamic expansion method of a distributed block storage system, which comprises the following steps:
s1: before extending the data storage service, it is determined whether the newly extended node is to serve as a monitoring service node. If yes, a certain SSD hard disk of the new expansion node is selected to be divided into 10GB partitions to store MON service data; and if the newly expanded node is not used as the monitoring service node, executing the original node expansion process.
S2: and combining a data storage service processing module to uniformly distribute the OSD Journal and the OSD Cache to each SSD of the nodes. Wherein the OSD Cache and the OSD Journal in the distributed block storage system are in a 1:1 relationship; and simultaneously, taking the corresponding HDD space as a mounting directory of the corresponding OSD.
S3: and expanding data storage service and monitoring service, and performing service expansion of management software after completion. Namely, the management software service is reinstalled on the node where the main MON service is located, the log information of the storage system before the backup expansion is imported after the management software is installed, and then the management software configuration files of the main MON service node are synchronized to the same position of all nodes of the distributed block storage system.
S4: after the management software is expanded, the TGTD service processing module acquires a main MON service node according to the management software service module, synchronizes a TGTD service configuration file of the main MON service node to a newly expanded node, and then starts the TGTD service of the newly expanded node.
S5: and after the TGTD service capacity expansion is completed, increasing the service IP through the high available service processing module. The high-availability service in the original distributed block storage system is not restarted, only the high-availability service of the new extension node is started, and the redistribution of the service IP can be influenced in the starting process of the high-availability service of the new extension node.
S6: and judging whether the service IP has read-write by using the TGTD service of the storage node, and determining the storage node allocated by the service IP according to the judgment result. In order to ensure that redistribution of the service IP has no influence on the customer service, whether read-write exists on the service IP is judged according to the TGTD service of the storage node, if read-write exists on the TGTD service of the storage node, the corresponding service IP is not redistributed to other storage nodes, and if no read-write exists on the TGTD service of the storage node, the corresponding service IP is allowed to be distributed to other storage nodes.
The embodiment provides a node dynamic expansion method of a distributed block storage system, which comprises the steps of firstly modifying a node expansion process of the distributed block storage system, before expanding data storage service, firstly determining whether a newly expanded node is used as a monitoring service node, and if so, selecting a certain SSD hard disk of the newly expanded node to divide a 10GB partition to store MON service data; and if the newly expanded node is not used as the monitoring service node, executing the original node expansion process. And secondly, after the data storage service is expanded, the expansion of the management software service is increased, namely, the management software service is reinstalled on a node where the main MON service is located, the log information of the storage system before the backup expansion is imported after the installation of the management software is completed, and then the management software configuration files of the main MON service node are synchronized to the same positions of all nodes of the storage system. And finally, after the management software service expansion is completed, synchronizing the TGTD service configuration file of the node where the main MON service is located to the same position of the new extension node, and then starting the TGTD service process of the new extension node. In addition, in order to ensure that the node dynamic expansion of the distributed block storage system has no influence on client services and can meet the requirement of high availability of the distributed block storage system after the node dynamic expansion, the processing of high available services is added after the TGTD service expansion of the distributed block storage system is completed; namely, when the service IP is added, the high available service in the original distributed block storage system is not restarted, and only the high available service of the new extension node is started.
Therefore, the node dynamic expansion method of the distributed block storage system provided by the embodiment reduces the influence degree on the customer service in the node dynamic expansion process, solves the problem of node failure after the node expansion of the storage system is completed, increases the robustness and the reliability of the distributed block storage system, and improves the competitiveness of distributed block storage products.
Example three:
as shown in fig. 4, this embodiment further provides another node dynamic expansion method of a distributed block storage system, which is implemented as follows:
(1) if the original distributed block stores 3 MON service nodes, if 3 nodes are dynamically expanded to the storage system, 2 nodes in the newly expanded 3 nodes need to be used as the MON service nodes. Because the distributed block storage system node is 6 nodes after dynamic expansion is completed, any two storage nodes can be failed if the theoretical storage pool is a triple copy, but only one storage node can be allowed to fail if the MON service node is not expanded (because 2 nodes are failed, the storage system has a probability that only one MON is left, so that the storage system is unusable).
(2) After the selection of the newly expanded MON service node is completed, the OSD Journal and the OSD Cache are equally distributed to each SSD of the node as much as possible through the monitoring service processing module and the data storage service processing module, and the corresponding HDD space is completely used as a mounting directory of the OSD, namely, the MON service and the OSD service in the newly expanded node are all added into the distributed block storage system.
(3) After the expansion of the MON service and the OSD service is finished, the management software service processing module obtains a node where the main MON service is located through a storage system configuration file, then the management software service is reinstalled on the node where the main MON service is located, log information of a backup storage system before expansion is imported after the management software is installed, and meanwhile, the management software configuration file of the main MON service node is synchronized to the same position of all nodes of the storage system.
(4) And synchronizing the TGTD service configuration file of the node where the main MON service is located to the same position of the new extension node through the TGTD service processing module, and then starting the TGTD service process of the new extension node. If the TGTD service is not expanded, the IP of the node fault scene service drifts to the newly expanded node, which can cause abnormal exit of the customer service.
(5) And increasing the service IP through the high-availability service processing module, namely ensuring that 6 storage nodes correspond to 6 service IPs. The high-availability service in the original distributed block storage system is not restarted, only the high-availability service of the new extension node is started, and the redistribution of the service IP can be influenced in the starting process of the high-availability service of the new extension node. If there is read-write on the service IP, the service IP is not redistributed, i.e. the newly added service IP is only distributed between the newly expanded nodes. If there is no read-write on the service IP, the service IP allows allocation, that is, 6 service IPs can be allocated randomly.
(6) After the dynamic expansion of the nodes of the distributed block storage is completed, the client can access the TGTD service through 6 service IPs, and then read-write operation is carried out on the distributed block storage system through the TGTD service.
Correspondingly, the invention also discloses a node dynamic expansion device of the distributed block storage system, which comprises:
a memory for storing a computer program;
a processor for implementing the method steps of the node dynamic expansion of the distributed block storage system as described in any one of the above when executing the computer program.
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be embodied in the form of a software product, where the computer software product is stored in a storage medium, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like, and the storage medium can store program codes, and includes instructions for enabling a computer terminal (which may be a personal computer, a server, or a second terminal, a network terminal, and the like) to perform all or part of the steps of the method in the embodiments of the present invention. The same and similar parts in the various embodiments in this specification may be referred to each other. Especially, for the terminal embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.
In the embodiments provided by the present invention, it should be understood that the disclosed system, system and method can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit.
Similarly, each processing unit in the embodiments of the present invention may be integrated into one functional module, or each processing unit may exist physically, or two or more processing units are integrated into one functional module.
The invention is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
Claims (8)
1. A node dynamic expansion system of a distributed block storage system, comprising: the system comprises a monitoring service processing module, a data storage service processing module, a management software service processing module, a TGTD service processing module and a high-availability service processing module;
the monitoring service processing module is used for selecting different node expansion processes according to whether the expansion node is used as a monitoring service node or not, and acquiring the node where the main monitoring service is located according to the configuration file of the storage system;
the data storage service processing module is used for completing the capacity expansion of the main monitoring service and the data storage service by matching with the monitoring service processing module;
the management software service processing module is used for all nodes of the distributed block storage system to perform node operation through management software after node expansion and reporting through the management software when abnormality occurs in the distributed block storage system;
the TGTD service processing module is used for controlling nodes in the distributed block storage system to provide storage service; and the high-availability service processing module is used for restarting the TGTD service within a specific time when the TGTD service is abnormally exited.
2. A node dynamic extension method of a distributed block storage system is characterized by comprising the following steps:
s1: before expanding data storage service, determining whether a newly expanded node is used as a monitoring service node;
s2: the data storage log disk and the data storage cache are uniformly distributed to each solid state disk of the node by combining a data storage service processing module;
s3: expanding data storage service and monitoring service, and performing service expansion of management software after completion;
s4: after the management software service expansion is completed, the TGTD service processing module acquires a main monitoring service node according to the management software service module, synchronizes a TGTD service configuration file of the main monitoring service node to a newly expanded node, and then starts the TGTD service of the newly expanded node;
s5: after the TGTD service capacity expansion is completed, increasing the service IP through a high available service processing module;
s6: and judging whether the service IP has read-write by using the TGTD service of the storage node, and determining the storage node allocated by the service IP according to the judgment result.
3. The method for dynamically expanding nodes in a distributed block storage system according to claim 2, wherein the step S1 specifically includes:
judging whether the newly expanded node is used as a monitoring service node, if so, selecting a certain solid state disk of the newly expanded node to divide a partition with a preset capacity to store monitoring service data; if not, executing the original node expansion process.
4. The node dynamic expansion method of the distributed block storage system according to claim 2, wherein the step S2 further includes:
the data storage log disk and the cache in the distributed block storage system are the same in quantity;
and the corresponding hard disk space is completely used for storing the mounting catalog of the corresponding data storage service.
5. The method for dynamically expanding nodes in a distributed block storage system according to claim 2, wherein the step S3 specifically includes:
and reinstalling the management software service on the main monitoring service node, importing the log information of the backup distributed block storage system before expansion after the installation is finished, and then synchronizing the configuration file of the management software service of the main monitoring service node to the same position of all nodes of the distributed block storage system.
6. The node dynamic expansion method of the distributed block storage system according to claim 2, wherein the step S5 includes:
the traffic IP is increased by initiating the highly available service of the new extension node.
7. The method for dynamically expanding nodes in a distributed block storage system according to claim 2, wherein the step S6 specifically includes:
if the TGTD service of the current storage node has read-write, the corresponding service IP cannot be redistributed to the storage except the current storage node; and if no read-write is carried out on the TGTD service of the current storage node, the corresponding service IP is allowed to be distributed to other storage nodes.
8. A node dynamic expansion apparatus of a distributed block storage system, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method for dynamic expansion of nodes of a distributed block storage system according to any of claims 2 to 7 when executing said computer program.
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| CN113835623A (en) * | 2021-08-30 | 2021-12-24 | 济南浪潮数据技术有限公司 | Cluster service capacity expansion method and device based on heterogeneous storage engine and storage medium |
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| CN109428913A (en) * | 2017-08-25 | 2019-03-05 | 浙江宇视科技有限公司 | A kind of storage expansion method and device |
| US10419368B1 (en) * | 2018-03-27 | 2019-09-17 | Spring Communications Company L.P. | Dynamic scaling of computing message architecture |
| CN110519354A (en) * | 2019-08-16 | 2019-11-29 | 济南浪潮数据技术有限公司 | A kind of distributed objects storage system and its method for processing business and storage medium |
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| CN111753997A (en) * | 2020-06-28 | 2020-10-09 | 北京百度网讯科技有限公司 | Distributed training method, system, device and storage medium |
| CN111753997B (en) * | 2020-06-28 | 2021-08-27 | 北京百度网讯科技有限公司 | Distributed training method, system, device and storage medium |
| CN112667449A (en) * | 2020-12-29 | 2021-04-16 | 新华三技术有限公司 | Cluster management method and device |
| CN113835623A (en) * | 2021-08-30 | 2021-12-24 | 济南浪潮数据技术有限公司 | Cluster service capacity expansion method and device based on heterogeneous storage engine and storage medium |
| CN113835623B (en) * | 2021-08-30 | 2023-12-29 | 济南浪潮数据技术有限公司 | Cluster service capacity expansion method and device based on heterogeneous storage engine and storage medium |
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