CN112905203A - Method, system and medium for online upgrading of Rbd client - Google Patents
Method, system and medium for online upgrading of Rbd client Download PDFInfo
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Abstract
The invention discloses an online upgrading method for an Rbd client, which comprises the following steps: upgrading the storage framework: upgrading the storage cluster and updating the drive files of the components in the platform; upgrading the Rbd client: creating a variable, acquiring the process id of the Rbd client and assigning the process id to the variable; updating a program file and a drive of a process of the Rbd client; searching the process of the Rbd client through the id in the variable, creating a sub-process, and updating the sub-process; replacing the process of the Rbd client with the sub-process; and (4) restarting and loading: restarting the components in the platform and loading the components in the platform; through the mode, the invention can realize the online upgrade of the Rbd client by optimizing the upgrade flow logic, and completes the version upgrade under the normal operation condition of the service without restarting the VM virtual machine, thereby ensuring the continuity of the operation of the user service and improving the efficiency of the service.
Description
Technical Field
The invention relates to the technical field of storage, in particular to a method, a system and a medium for online upgrading of an Rbd client.
Background
The backend storage requirements of the OpenStack comprise blocks, objects and files, and the Ceph provides unified storage of the three types of storage interfaces at the same time and is the first backend storage pushed by the OpenStack cloud platform. Two modes of Rbd and iscsi are commonly adopted for docking when OpenStack docks a Ceph block scene, and because the Rbd mode has the characteristics of high performance, low time delay and high reliability compared with the iscsi, the Rbd mode is commonly adopted for docking by mainstream commercial Ceph manufacturers at present.
Under the current technical architecture, please refer to fig. 1, the OpenStack cloud platform is connected with the Ceph storage cluster in an Rbd mode, when the Ceph storage needs to contain 2 parts when the system version is upgraded, the version of the Ceph storage cluster is upgraded and the Rbd client of the Ceph cluster is upgraded, and the version of the Ceph cluster is upgraded;
the existing Rbd client upgrading process is indispensable to a step of restarting a virtual machine of a VM, the step needs to restart the virtual machine to reload a circle, Nova and gloss update drivers of an OpenStack and a LibRbd and Librados interface of an Rbd client, the restarting of the VM virtual machine means that front-end service application must be interrupted, a lot of uncertainty is added to client service and operation and maintenance management personnel, and a shutdown window needs to be coordinated when the service is stopped, so that great influence is caused on service production.
Disclosure of Invention
The method mainly solves the problem that the service is influenced by restarting the VM virtual machine when the Rbd client is upgraded at present.
In order to solve the technical problems, the invention adopts a technical scheme that: the method for upgrading the Rbd client on line comprises the following steps:
upgrading the storage framework: upgrading the storage cluster and updating the drive files of the components in the platform;
upgrading the Rbd client:
creating a variable, acquiring the process id of the Rbd client and assigning the process id to the variable;
updating a program file and a drive of a process of the Rbd client;
searching the process of the Rbd client through the id in the variable, creating a sub-process, and updating the sub-process;
replacing the process of the Rbd client with the sub-process;
and (4) restarting and loading: and restarting and loading the components in the platform.
Preferably, the step of creating the sub-process further comprises:
creating a process which is the same as the process of the Rbd client through a copy function, and recording the process as a sub-process;
the id of the sub-process is the same as the process id of the Rbd client.
Preferably, the step of updating the sub-process further comprises:
and calling a replacement function to enable the sub-process to execute an updating program, replacing the data and the codes in the sub-process with the updated data and the codes of the process of the Rbd client, wherein in the replacement process, the id of the sub-process is kept unchanged.
Preferably, the step of replacing the process of the Rbd client with the sub-process further includes:
replacing the process of the Rbd client with the sub-process through a replacement function;
and setting the id in the variable to zero, and deleting the process of the Rbd client.
Preferably, after the process of the Rbd client is replaced by the sub-process through a replacement function, whether the id in the variable is set to zero is detected;
if the id in the variable is not set to zero, replacing the sub-process with the process of the Rbd client again;
and if the id in the variable is set to zero, the upgrading of the Rbd client is completed.
Preferably, the variables include a first variable and a second variable;
the processes of the Rbd client comprise a first process and a second process;
assigning the id of the first process to the first variable; assigning the id of the second process to the second variable;
the sub-processes comprise a first sub-process and a second sub-process;
the code segment and the data segment of the first sub-process are the same as the code segment and the data segment of the first process; the code and data segments of the second sub-process are the same as the code and data segments of the second process.
The invention also provides a system for online upgrading of the Rbd client, which comprises the following steps: the system comprises a storage architecture upgrading module, a client upgrading module and a restarting loading module;
the storage architecture upgrading module is used for upgrading the storage cluster and updating the drive files of the components in the platform;
the client upgrading module is used for upgrading the process of the Rbd client;
the client side upgrading module comprises a variable assignment module, an updating module and a searching and replacing module;
the variable assignment module is used for creating a variable, acquiring the process id of the Rbd client and assigning the variable;
the updating module is used for updating the program file and the drive of the process of the Rbd client;
the search replacement module is used for searching the process of the Rbd client through the variable, creating a sub-process and updating the sub-process;
a process for replacing the child process with the Rbd client;
the restarting loading module is used for restarting the components in the platform and loading the components.
As a further improvement of the system for online upgrading of the Rbd client, the invention comprises the following steps: the updating module further comprises a detecting module;
the detection module is used for detecting whether the id in the variable is set to zero or not;
and if the id in the variable is not set to zero, sending the information that the id in the variable is not set to zero to the search replacement module.
As a further improvement of the system for online upgrading of the Rbd client, the invention comprises the following steps: the variable storage device further comprises a storage module, wherein the storage module is used for storing the variable.
The invention also provides a computer readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the steps of the method for upgrading the Rbd client online are realized.
The invention has the beneficial effects that:
1. the method for upgrading the Rbd client on line can realize the on-line upgrading of the Rbd client by optimizing the upgrading flow logic, complete the version upgrading under the condition of normal operation of the service without restarting a Virtual Machine (VM), ensure the continuity of the operation of the user service and improve the efficiency of the service.
2. The system for upgrading the Rbd client on line can upgrade the Rbd client on line through the client upgrading module, detect whether the variable is set to zero through the detection module, judge whether the client is upgraded successfully, inform the search and replacement module if the client is not upgraded successfully, detect whether the online upgrading is successful or not, and inform the search and replacement module again if the client is not upgraded successfully, so that errors of upgrading failure are avoided, and the upgrading success rate is improved.
3. The computer-readable storage medium can find the process of the Rbd client according to the process number by acquiring the process number, create the sub-process through the fork function, upgrade the sub-process, replace the sub-process and the process of the Rbd client after the upgrade is completed, do not need to restart the VM virtual machine during the upgrade, and ensure the reliability of the service during operation.
Drawings
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an OpenStack cloud platform interfacing a Ceph storage cluster architecture through Rbd;
fig. 2 is a schematic diagram of a method for online upgrade of an Rbd client according to embodiment 1 of the present invention;
fig. 3 is a schematic flow chart of a method for online upgrade of an Rbd client according to embodiment 1 of the present invention;
fig. 4 is a schematic flow chart of upgrading an Rbd client in the method for upgrading the Rbd client online according to embodiment 1 of the present invention;
fig. 5 is a schematic diagram of a system architecture for online upgrade of an Rbd client according to embodiment 2 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It is noted that in the description of the present invention
iSCSI (Internet Small Computer System interface) Internet Small Computer System interface, also called IP-SAN, is a storage technology based on Internet and SCSI-3 protocol;
ceph: an open source software storage platform implements object storage on a single distributed computer cluster and provides a three-in-one interface for object, block-level, and file-level storage.
OpenStack: a free open standard cloud computing platform is mainly deployed in public clouds and private clouds, wherein virtual servers and other resources can be used by users, and the free open standard cloud computing platform is mainly deployed as infrastructure as a service.
VM: the virtual machine is a virtual host under the OpenStack cloud platform.
Nova: and the OpenStack core component is responsible for managing the life cycle of the VM.
And (3) a Cinder: and the OpenStack core component provides a block storage service.
Glance: and the OpenStack core component manages the VM images.
Rbd: RADOS Block Device is a storage service middle layer which is constructed on a RADOS cluster and provides a Block Device interface for a client.
The RBD is a client service providing block storage in ceph, so that the client service is a block storage service developed based on librados API as compared with RADOS. The Ceph bottom layer is realized by object storage, and realizes an interface of block storage through librbd, thereby providing services of block storage for the outside.
LibRbd: the Rbd python module provides file-like access to the Rbd image.
The Librados Ceph provides an interface to access the RADS (reusable automated distributed object store) in the storage cluster.
The replacing function is an Exec function, which provides a method for starting another program to execute in the process, and can find an executable file according to a specified file name or directory name and replace a data segment, a code segment and a stack segment of an original calling process, and after the execution is finished, the content of the original calling process is replaced by the content of the new program except for a process number.
pidef is used to find out the process ID of a running program, which may be a binary executive or a shell script.
A recursive fork is a bifurcating function in UNIX or UNIX-like, which divides a running program into 2 (almost) identical processes, each of which starts a thread that starts from the same location in the code. The threads in the two processes continue to execute as if two users started two copies of the application at the same time.
The first process is a LibRbd process and the second process is a Librados process.
Example 1
An embodiment of the present invention provides a method for online upgrading an Rbd client, please refer to fig. 2 and fig. 3, including the following steps:
s100, starting upgrading, upgrading the Ceph storage cluster, and not influencing services in the upgrading process by means of high reliability of the Ceph storage cluster;
s200, updating the OpenStack platform driver; the OpenStack platform driver comprises drivers of a circle, Nova and a company core component, and the updated driver file is replaced by the original driver file;
s300, please refer to FIG. 4, upgrade the Rbd client;
s301, creating a first variable pidRbd and a second variable pidridos;
the first variable pidRbd and the second variable pidridos are self-defined variables and are stored in a memory or a storage of the OpenStack;
s302, the upgrading program acquires the id number of a LibRbd process of the Rbd client core process through a pidof program command, and assigns the id number of the LibRbd process to a first variable pidRbd;
s303, the upgrading program acquires the id number of the library process of the core process of the Rbd client through a pidof program command, and assigns the id number of the library process to a second variable pidridos;
s304, updating the Librbd and Librados program files, and updating the program files and the driver into a new version through an rpm upgrading program and an operation script;
s305, updating the program files of the Librbd and the Librados, wherein the Rbd client runs the processes of the Librbd and the Librados at the moment, so that the processes of the Librbd and the Librados need to be updated;
searching for a Librbd process and a Librados process according to the first variable pidRbd and the second variable pidados after the assignment, executing the replacement of the Librbd process and the Librados process, setting the first variable pidRbd and the second variable pidados to zero after the replacement of the Librbd process and the Librados process is executed, and judging whether the online upgrade is finished or not according to whether the variable values of the first variable pidRbd and the second variable pidados are zero or not after the zero setting;
the method comprises the following specific steps: finding a libRbd process according to a first variable pidRbd, and finding a Librados process according to a second variable pidrados; creating a first sub-process and a second sub-process through a fork function, wherein the first sub-process is completely the same as the libRbd process, and the second sub-process is completely the same as the Librados process;
the method comprises the steps that a first sub-process and a second sub-process copy all contents in a libRbd process and a libarads process, wherein the contents comprise a code segment and a data segment, the first sub-process and the second sub-process execute the same program as the libRbd process and the libarads process, the completed functions are also the same, when the libRbd process and the libarads process need to be updated, the first sub-process and the second sub-process are updated, normal use of an Rbd client is not affected, after updating is completed, ids in a first variable pidRbd and a second variable pidralds are set to be zero, and the ids of the first sub-process and the second sub-process are not changed as the original ids, so that the first sub-process and the second sub-process are updated and replaced by the libRbd process and the libarads process;
the specific steps of updating and replacing the first sub-process and the second sub-process with a libRbd process and a Librados process are as follows: calling an exec function to enable the subprocesses to execute other programs, in the embodiment, by calling the exec function, executing an updating program in a first subprocess and a second subprocess, completely replacing data and codes in the first subprocess and the second subprocess with data and codes of a libRbd process and a libarads process which need to be updated, further changing the first subprocess and the second subprocess into the updated libRbd process and the libarads process, but not creating a new process when the exec function is replaced, so that id of the process before calling the exec function and the process after calling the exec function is not changed, replacing the libRbd process and the libarads process by the exec function in the first subprocess and the second subprocess after replacement, setting id of a first variable pidRbd and a second variable pidrads to be 0 after replacement is completed, and deleting the original libarads process and the libarads process; the whole process has no influence on the front-end service;
and detecting whether the id in the first variable pidRbd and the second variable pidridos is set to 0, ensuring that the updating is completed, and if not, repeating the step S305.
After replacement is completed, the current virtual machine VM normally runs, the id of the first sub-process and the id of the second sub-process called by the Rbd client are the same as the id before updating, and the original lidRbd process and the Librados process are replaced by the updated lidRbd process and the Librados process;
s400, restarting the core components of circle, Nova and chord in OpenStack, reloading the core components of circle, Nova and chord, and ensuring that the core components load updated drive files.
And S500, finishing upgrading.
Example 2
An embodiment of the present invention further provides a system for online upgrade of an Rbd client, please refer to fig. 5, including: the system comprises a storage architecture upgrading module, a client upgrading module, a restarting loading module and a storage module;
the storage architecture upgrading module is used for upgrading the storage cluster and updating the drive files of the components in the platform;
the client upgrading module is used for upgrading the process of the Rbd client;
the client upgrading module comprises a variable assignment module, an updating module and a searching and replacing module;
the variable assignment module is used for creating a variable, acquiring the process id of the Rbd client and assigning the variable;
the updating module is used for updating the program file and the drive of the process of the Rbd client;
the search replacement module is used for searching the process of the Rbd client through the variable, creating a sub-process and updating the sub-process;
a process for replacing the child process with the Rbd client.
And the restarting loading module is used for restarting the components in the platform and loading the components.
The storage module is used for storing the variable.
The updating module further comprises a detecting module;
the detection module is used for detecting whether the id in the variable is set to zero or not;
and if the id in the variable is not set to zero, sending the information that the id in the variable is not set to zero to the search replacement module.
Based on the same inventive concept as the method in the foregoing embodiments, the present specification embodiment further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for online upgrading the Rbd client as disclosed in the foregoing are implemented.
The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, and a program that can be implemented by the hardware and can be instructed by the program to be executed by the relevant hardware may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic or optical disk, and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for upgrading an Rbd client on line is characterized by comprising the following steps:
upgrading the storage framework: upgrading the storage cluster and updating the drive files of the components in the platform;
upgrading the Rbd client:
creating a variable, acquiring the process id of the Rbd client and assigning the process id to the variable;
updating a program file and a drive of a process of the Rbd client;
searching the process of the Rbd client through the id in the variable, creating a sub-process, and updating the sub-process;
replacing the process of the Rbd client with the sub-process;
and (4) restarting and loading: and restarting and loading the components in the platform.
2. The method for online upgrade of the Rbd client as claimed in claim 1, wherein: the step of creating a sub-process further comprises:
creating a process which is the same as the process of the Rbd client through a copy function, and recording the process as a sub-process;
the id of the sub-process is the same as the process id of the Rbd client.
3. The method for online upgrade of the Rbd client as claimed in claim 2, wherein: the step of updating the sub-process further comprises:
and calling a replacement function to enable the sub-process to execute an updating program, replacing the data and the codes in the sub-process with the updated data and the codes of the process of the Rbd client, wherein in the replacement process, the id of the sub-process is kept unchanged.
4. The method for online upgrade of the Rbd client as claimed in claim 3, wherein: the step of replacing the process of the Rbd client with the sub-process further comprises:
replacing the process of the Rbd client with the sub-process through a replacement function;
and setting the id in the variable to zero, and deleting the process of the Rbd client.
5. The method for online upgrade of the Rbd client as claimed in claim 4, wherein: replacing the process of the Rbd client with the sub-process through a replacement function, and detecting whether the id in the variable is set to zero;
if the id in the variable is not set to zero, replacing the sub-process with the process of the Rbd client again;
and if the id in the variable is set to zero, the upgrading of the Rbd client is completed.
6. The method for online upgrade of the Rbd client as claimed in claim 1, wherein: the variables include a first variable and a second variable;
the processes of the Rbd client comprise a first process and a second process;
assigning the id of the first process to the first variable; assigning the id of the second process to the second variable;
the sub-processes comprise a first sub-process and a second sub-process;
the code segment and the data segment of the first sub-process are the same as the code segment and the data segment of the first process; the code and data segments of the second sub-process are the same as the code and data segments of the second process.
7. A system for online upgrade of an Rbd client is characterized by comprising: the system comprises a storage architecture upgrading module, a client upgrading module and a restarting loading module;
the storage architecture upgrading module is used for upgrading the storage cluster and updating the drive files of the components in the platform;
the client upgrading module is used for upgrading the process of the Rbd client;
the client side upgrading module comprises a variable assignment module, an updating module and a searching and replacing module;
the variable assignment module is used for creating a variable, acquiring the process id of the Rbd client and assigning the variable;
the updating module is used for updating the program file and the drive of the process of the Rbd client;
the search replacement module is used for searching the process of the Rbd client through the variable, creating a sub-process and updating the sub-process;
a process for replacing the child process with the Rbd client;
the restarting loading module is used for restarting the components in the platform and loading the components.
8. The system for online upgrade of the Rbd client as claimed in claim 7, wherein:
the updating module further comprises a detecting module;
the detection module is used for detecting whether the id in the variable is set to zero or not;
and if the id in the variable is not set to zero, sending the information that the id in the variable is not set to zero to the search replacement module.
9. The system for Rbd client online upgrade according to claim 7 or 8, wherein: the variable storage device further comprises a storage module, wherein the storage module is used for storing the variable.
10. A computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor, performs the steps of a method for online upgrade of an Rbd client according to any of claims 1-6.
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