CN101916172B - Virtual disk image logic partitioning-based on-demand software distribution method - Google Patents
Virtual disk image logic partitioning-based on-demand software distribution method Download PDFInfo
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Abstract
The invention discloses a virtual disk image logic partitioning-based on-demand software distribution method. The method comprises the following steps that: by adopting a system structure of a client/server, a server stores virtual disk images of all virtual machines and logically partitions a conventional single virtual disk image into a plurality of disk block sets by respectively recording disk blocks occupied when every kind of software is installed; and then a software distribution service program of the server and a client program of a client distribute the disk block sets corresponding to software as required through the interaction of a client/server mode according to the software requirements of users so as to reduce the expense on software distribution and quicken software allocation.
Description
Technical field
The present invention relates to the software distribution method in the Computer Systems Organization field, especially refer to a kind of demand software distribution method based on the virtual disk logical division.
Background technology
The high speed development of computer software and hardware and network technology, make making up the large-scale calculations environment becomes possibility, and be widely used in grid computing, fields such as ecommerce, the Web-based instruction.The large-scale calculations environment has distribution, isomery and sweeping characteristic, makes system management become very difficult.Software dispatch in the large-scale calculations environment (Software Provision) is exactly an outstanding difficult point problem.In the large-scale calculations environment, need install and the configuration various software for each client, and need to upgrade in real time or regularly.The general software distribution method that adopts based on every user installation, this method is meant and is each user installation operating system and multiple application software one by one, automatic enforcement is made mistakes, is difficult to this method easily, and manpower and materials expense that need be huge, the quick deployment request of incompatibility large-scale calculations environment.
In recent years, system virtual machine (System Virtual Machine) becomes the focus of research and application because of the characteristic of its transparency, isolation, encapsulation, manageability.And realize that based on virtual machine software distribution method rapidly and efficiently becomes a solution that satisfies quick deployment request.Typical dummy machine system mainly is made up of bottom hardware platform, virtual machine manager VMM (Virtual Machine Monitor), client operating system (Guest OS) and the application that operates in wherein.VMM is the key component of virtual machine, and it provides virtualized hardware platform for the upper strata client operating system, and the state of client operating system is had the ability of encapsulation fully.VMM is made up of dynamic binary translator (DBT), dummy block will device drives (VBD), user interactions modules such as (UIM) usually, the user can be by the function of user interactions interface (UII) invoke user interactive module, with the state of inquiring about and be provided with virtual machine and the operation of controlling virtual machine.
At first the whole state of client operating system in the virtual machine is encapsulated in the virtual disk image file on the host based on the software distribution method of virtual machine by VMM, then the virtual disk image file is transferred on the subscriber set, end user directly moves the client operating system in the virtual disk reflection and the software that configures has been installed by VMM, needn't reinstall and configuration software.This distribution method greatly reduces keeper and user's burden, and can quicken distribution procedure.
Yet, at present thisly realize that based on virtual machine still there is following limitation in the method for quick software dispatch: the virtual disk image file size that 1) operating system and various softwares are installed more than several GB, is directly transmitted whole virtual disk image file and can be caused higher communication overhead usually; 2) different user has different software requirements, has the virtual disk reflection of all softwares can bring the waste of disk space and meaningless transport overhead for each user's distribution and installation; 3), then have to distribute again the whole virtual disk image file after the renewal if the software in the virtual disk is updated.
The C.Sapuntzakis of Stanford University etc. has proposed to optimize the migration of virtual machine on slow network based on the virtual disk reflection physical segmentation method of COW (Copy-On-Write) mechanism.This method is utilized COW mechanism, traditional single large scale virtual disk reflection physical segmentation is become the virtual disk reflection (COW disk) of a plurality of reduced sizes, each COW disk is equipped with various software, then the expense of moving on network with the reduction virtual machine by COW disk from reduced size to the user that distribute.For the software that is updated, only needing has the COW disk of new version software to get final product to user's distribution and installation.Still there is following deficiency in this method:
● COW disk distribution expense: cause lower disk access performance for fear of generating more COW disk, thereby the software that more kind is installed in the COW disk usually generates the COW disk of large-size, and then cause higher COW disk distribution expense.
● COW disk image management: because software upgrading constantly has new COW disk to generate.Frequent or long-term software upgrading meeting causes generating a large amount of COW disk images, makes troubles to the management of virtual disk reflection.
Software upgrading: software upgrading causes the COW disk constantly to increase, thereby makes the access performance of virtual disk also constantly reduce, and therefore is difficult to support the software upgrading of lasting (frequent or long-term).The a large amount of early version COW disks occupation space on host that generates owing to software upgrading does not discharge, and therefore can cause the waste of disk space.
Summary of the invention
The technical problem to be solved in the present invention is: under the prerequisite that satisfies user software use kind and performance requirement, further reduce the expense of Software deployment under the virtual machine environment, management that the simplification virtual disk is videoed and the waste of avoiding disk space, support lasting software upgrading, the demand that satisfies large-scale virtual machine environment dynamic construction and dispose fast.
Technical scheme of the present invention is: the system architecture that adopts client/server, server end is stored the virtual disk reflection of all virtual machines, and, traditional single virtual disk image logically is divided into a plurality of disk block set by writing down the disk block that takies when every kind of software is installed respectively; The CLIENT PROGRAM of the software dispatch service routine of server end and user side is according to user's software requirement then, gather to the disk block of user side distributing software correspondence desirably by the mutual of Client, to reduce the expense of software dispatch, accelerate the speed of Software deployment.
Concrete steps are:
The first step virtual machine manager VMM is carried out the function expansion, and the VMM after will expanding is deployed to server end and client.
1.1 the module that expansion is numbered and names the every kind of software that is installed in the virtual disk in the user interactive module of VMM.To software be numbered and name regular as follows:
(1) software numbering: the integer numbering that is used to represent the software erection sequence.Operating system software is an installed software at first, and VMM is numbered 1 for the default software of its distribution; Follow-up numbering is distributed to other software by VMM successively according to the order of installing.
(2) the run mode numbering 255: during the non-install software of virtual machine, and VMM utilization and operation attitude numbering 255.
(3) current software numbering: VMM can safeguard a current software numbering in the virtual machine operational process.When certain software being installed, the numbering of this software correspondence is current software numbering; Otherwise current software is numbered run mode numbering 255.When current software numbering needed to change, VMM can distribute automatically or by the user interactions interface current software numbering is set by hand.
(4) stand-by software numbering: for unloaded software, its software numbering becomes stand-by software numbering.When VMM is new installed software distribution software numbering, preferentially from stand-by software numbering by from small to large order assignment.
(5) software another name: except the software numbering, can be that every kind of installed software is provided with an another name of being convenient to remember so that software is operated also by the user interactions interface.For unloaded software, corresponding software another name can be put sky.
Concrete extended method is as follows:
1.1.1 in user interactive module, increase software numbering and another name management submodule, operations such as this submodule is to the software numbering and another name distributes, setting, modification, deletion and inquiry.
1.1.2 increase software numbering and another name administration order in the user interactions interface, these command calls software numberings and another name management submodule are realized corresponding software numbering and another name management function.
1.1.3 increase the software administration order in the user interactions interface, these orders are used to be provided with the correlation parameter under software administration mode (installation/renewal/unloading) and the every kind of pattern.These orders also can be called the automatic management function that the function of software numbering and another name management submodule is come executive software numbering and another name, comprise the automatic distribution and the setting of software numbering, and the software another name put sky etc.
1.2 expansion is to software block bitmap SBB (Software Block Bitmap) and overall piece distribution bitmap GDB (Global block Distribution Bitmap), user side buffer memory function of initializing, get the support of piece function as required in the block device driver module of VMM.Concrete extended method is as follows:
1.2.1 in the block device driver module, increase software block bitmap SBB read-write submodule.Software block bitmap SBB is a file on the host, is used to write down the disk block that every kind of software installing on the virtual disk takies.Each position piece on (bit) corresponding in order virtual disk of each byte wherein, the corresponding piece of 0 expression is unoccupied, and 1 expression is occupied.When every kind of software installation process began, the block device driver module generated the SBB of a correspondence according to its software numbering; Software block bitmap read-write submodule is with the disk block write in the software installation process corresponding position, position in SBB.
1.2.2 in the block device driver module, increase overall piece distribution bitmap GDB read-write submodule.Overall situation piece distribution bitmap GDB is a file on the host, is used to write down the software numbering of the affiliated software of each disk block on the virtual disk.A piece on the corresponding in order virtual disk of each byte wherein, the value of byte promptly are the software numberings that takies the software correspondence of this piece.GDB generates when creating the virtual disk of virtual machine.Each disk block of being write in software installation process, overall piece distribution bitmap read-write submodule writes the position of being write the piece correspondence among the GDB with current software numbering.
1.2.3 in the block device driver module, increase user side buffer memory initialization submodule.This submodule obtains the information of available software from server end by the CLIENT PROGRAM sd_client of user side in user side virtual machine activation process, every kind of software of initialization is at the buffer status of user side, derivation work virtual disk WVD (Work Virtual Disk) sees 3.5.1 for details.
1.2.4 in the block device driver module, increase and get the piece submodule as required.Virtual machine is in the user side operational process, when the piece of virtual machine request not at local cache or be updated, get the CLIENT PROGRAM sd_client that the piece submodule moves as required and send the piece request of getting in host, sd_client will get the service routine sd_server that the piece request is transmitted to server end again, sd_server reads the piece of request from the virtual disk reflection, send to sd_client then, the piece that sd_client will receive is at last given and is got the piece submodule as required, to satisfy the read request of virtual machine.
1.2.5 in the block device driver module, increase SHA1 listing file management submodule.160 SHA1 cryptographic hash of the disk block that every kind of software of SHA1 (Secure Hash Algorithm) listing file record is shared are used for avoiding software distribution process to retransmit piece at the user side buffer memory.This submodule is carried out the function of the SHA1 listing file of establishment, deletion, renewal and query software.
In second step, server end carries out logical division to the single virtual disk image.Logical division is meant software is installed in the single virtual disk image, and the software block bitmap file SBB by every kind of software correspondence with the single virtual disk from being divided into a plurality of disk blocks set in logic, comprise the disk block that software takies in each disk block set.Concrete steps are as follows:
2.1 establishment virtual disk: utilize the virtual machine manager of expansion to create the single virtual disk image file of virtual machine, and generate empty overall piece distribution bitmap GDB.Comprise overall bitmap block GBB (Global Block Bitmap) in the file header of virtual disk image file, each disk block is a corresponding position (bit) in GBB, if this piece is occupied, then corresponding position is put 1.
2.2 installation client operating system
(1) initialization: it is that software is installed that user interactions interface interchange software administration order is provided with the software administration mode, software numbering and the current software of another name management submodule initialization are numbered 1, it is os that default alias is set, and creates the software block bitmap SBB of client operating system.
(2) client operating system is installed: on the new virtual disk reflection of creating, start virtual machine, client operating system is installed; In the installation process, the block device driver module of VMM is whenever write after the piece, at first with the position 1 of this piece correspondence among the GBB, call the position 1 of SBB read-write submodule again, call the position that GDB read-write submodule writes the software numbering 1 of operating system this piece correspondence among the overall piece distribution bitmap GDB at last this piece correspondence among the SBB.
(3) after operating system installation finished, user interactions interface interchange software administration order notice VMM client operating system installation process finished, and software numbering and another name management submodule switch current software numbers to run mode numbering 255.
(4) restart or close virtual machine.
2.3 install, upgrade, unload application software: the software that the user needs is installed after client operating system installs one by one again.In every kind of software installation process, the start and end time point that software is installed is set by user interactions interface interchange software administration order.The order that software numbering is installed according to software is increased progressively automatically and is distributed by the software numbering of VMM and another name management submodule; The software another name manually was provided with by the user interactions interface before software is installed beginning.The installation of every kind of software comprises following steps:
(1) initialization: it is that software is installed that user interactions interface interchange software administration order is provided with the software administration mode, and software is numbered and another name management submodule distribution software is numbered and this software numbering is numbered as current software; Call software numbering and another name administration order corresponding software another name is set; The block device driver module is created the SBB of this software correspondence.
(2) install software: in virtual machine, start software installation procedure, the beginning install software; In the install software process, whenever write a piece, the block device driver module calls the position 1 of SBB read-write submodule with this piece correspondence among the SBB at first with the position 1 of this piece correspondence among the GBB, calls the position that GDB read-write submodule writes current software numbering this piece correspondence among the GDB at last.
(3) finish: after software was installed and finished, user interactions interface interchange software administration order notice VMM software installation process finished, and software numbering and another name management submodule switch current software numbers to run mode numbering 255.
Software upgrading is the software administration task of virtual machine environment the next item down routine.Software upgrading is divided into that full dose is upgraded and two types of incremental updates.It is to utilize the complete redaction of software that software is comprehensively upgraded that full dose is upgraded; Incremental update is that mounted legacy version software is carried out partial update.The concrete steps of software upgrading are as follows:
(1) initialization: it is software upgrading that user interactions interface interchange software administration order is provided with the software administration mode, and more new model is set; Call the software numbering that software is called, the query software another name is corresponding that software numbering and another name administration order setting are updated software, and this software numbering is numbered as current software.If full dose is new model more, the block device driver module empties the corresponding SBB of this software numbering.
(2) update software: in virtual machine, start the software upgrading program and carry out software upgrading; In the software upgrading process, whenever write a piece, the block device driver module calls the position 1 of SBB read-write submodule with this piece correspondence among the SBB at first with the position 1 of this piece correspondence among the GBB, calls the position that GDB read-write submodule writes current software numbering this piece correspondence among the GDB at last.
(3) finish: after the software upgrading process finished, user interactions interface interchange software administration order notice VMM software upgrading process finished, and software numbering and another name management submodule switch current software numbers to run mode numbering 255.
The concrete steps of uninstall are as follows:
(1) initialization: it is the software unloading that user interactions interface interchange software administration order is provided with the software administration mode, and calls the software numbering and call the software another name that uninstall is wanted in the administration order setting; Software numbering and another name are managed the corresponding software numbering of submodule query software another name, and this software numbering is numbered as current software.
(2) uninstall: in virtual machine, start the software Uninstaller, the beginning uninstall.
(3) finish: after the software uninstall process finishes, user interactions interface interchange software administration order notice VMM software uninstall process finishes, software numbering and another name management submodule add the set of stand-by software numbering with the software numbering of correspondence, and put empty corresponding software and call, delete the SBB of unloaded software correspondence, switch current software and number to run mode numbering 255.
2.4 generate the SHA1 listing file of software:, except the SBB that generates every kind of software, also be that every kind of software generates a SHA1 listing file at server end.In software distribution process, the SHA1 listing file of software correspondence also can partly or entirely be cached to user side, is referred to as shadow (Shadow) SHA1 listing file.The SHA1 listing file comprises following content:
(1) markers: the time tag that software is installed.With markers in the shadow SHA1 listing file of user side and server end correspondence the SHA1 listing file in markers compare, judge whether the software of user side buffer memory is latest edition.
(2) empty sign: at server end, this sign is invalid; At user side, whether the corresponding software of expression buffer memory not fully.
(3) integrity flag: at server end, this sign is invalid; At user side, this sign is used to represent the latest edition of software, and whether total caching is to user side.
(4) total block data: the total block data that software takies.
(5) active block number:, equal total block data at server end; At user side, be the piece number of the latest edition of buffer memory; When the active block number of user side equates with total block data, integrity flag is put 1.
(6) active block bitmap: at server end, this field is invalid; At user side, in the bitmap by the position of being put, the piece that shows correspondence be markers the latest block of corresponding version.
(7) piece SHA1 value sequence: the sequence of the SHA1 cryptographic hash of each piece that logging software is shared.
When certain software of server end is updated, corresponding SHA1 listing file also needs to regenerate.The generation method of SHA1 listing file is:
(1) management of the SHA1 listing file in the block device driver module of VMM submodule is created empty SHA1 listing file.
(2) for the piece of each set among the SBB, SHA1 listing file management submodule reads in the virtual disk corresponding piece and calculates its SHA1 value, then result of calculation is write the position of this piece correspondence in the SHA1 listing file.
(3) SHA1 listing file management submodule is provided with markers, total block data and the active block digital section in the SHA1 listing file.
In the 3rd step, carry out software dispatch as required.Server end is according to the software block bitmap SBB of every kind of software, and the disk block that the required software of user is taken is transferred to user side, thereby realizes the distribution as required of software.The software dispatch service routine sd_server of the present invention's exploitation and CLIENT PROGRAM sd_client are mutual by Client, the collaborative distribution procedure as required of finishing software.Sd_server operates in server end, and sd_client operates in user side.Concrete distributing step is as follows:
3.1 the CLIENT PROGRAM sd_client of user side copies the overall piece distribution bitmap GDB of server end to user side.
3.2 the available software of the sd_client querying server end of user side, the service routine sd_server of server end returns the software another name tabulation of available software.
3.3 the sd_client of user side submits user's software requirement (being the tabulation of software another name) to the sd_server of server end, sd_client sends to sd_server with the markers in the shadow SHA1 listing file of the software of asking of user side buffer memory, empty sign, integrity flag simultaneously.
3.4 the sd_server of server end is according to the SBB of software that the user asks, the disk block that software that the user asks is taken sends to the sd_client of user side; Sd_client is saved in the disk block that receives among the shadow virtual disk SVD (Shadow Virtual Disk) of user side, uses for the user side virtual machine.The virtual disk of part disk block reflection in the shadow virtual disk has been the user side buffer memory server end virtual disk.Concrete steps are as follows:
3.4.1 the SBB and the SHA1 listing file of the sd_server software that consumer positioning is asked of server end, to the sd_client of user side send in the SHA1 listing file of software that the user asks markers, total block data.
3.4.2 according to the correlating markings in the user side shadow SHA1 listing file, the sd_server of sd_client and server end is transferred to user side by complete push mode or interactive push mode with the disk block that software that the user asks takies.
If sd_client finds the empty zone bit set in the shadow SHA1 listing file of user side, promptly Qing Qiu software is at user side buffer memory not fully, and then sd_server and sd_client are sent to user side by complete push mode with the disk block that software takies.Fully push mode is meant sd_server and sends to the sd_client except the disk block that software is taken, and does not have other interactive action between sd_server and the sd_client.Concrete steps are as follows:
(1) sd_server and sd_client initialization enter complete push mode.
(2) sd_server reads piece that is set among the SBB and the SHA1 value that reads piece from the SHA1 listing file of correspondence according to the SBB of request software from the virtual disk reflection, sends to sd_client then.
(3) sd_client each piece that will receive is saved among the local SVD, position 1 with this piece correspondence among the shadow GBB, the SHA1 value of this piece is saved in the position of this piece correspondence in the shadow SHA1 listing file of software correspondence, position 1 with this piece correspondence in the active block bitmap in the shadow SHA1 listing file increases progressively the active block number in the shadow SHA1 listing file.
(4) sd_client removes the sky sign in the user side shadow SHA1 listing file.
If integrity flag in the shadow SHA1 listing file of sd_client discovery user side and all not set of empty sign, promptly Qing Qiu software is at the user side partial buffering, then sd_server and sd_client be by interactive push mode, and buffer memory or the piece that upgraded are not transferred to user side with those.Interactive push mode is meant sd_server and sends to the sd_client except the disk block that software is taken, between sd_server and the sd_client also by avoiding transmitting disk block alternately at the user side buffer memory.Concrete steps are as follows:
(1) sd_server and sd_client initialization enter interactive push mode.
(2) piece that is set among the SBB of sd_server with request software number sends to sd_client.
(3) corresponding position is carried out xor operation respectively in the active block bitmap in the shadow SHA1 listing file of sd_client piece that sd_server is sent number and software, and the result of xor operation is issued sd_server;
(4) sd_server directly sends to sd_client with xor operation result mid-1 piece (promptly not at the piece of user side buffer memory).
(5) if markers in the shadow SHA1 listing file and the markers in the SHA1 listing file of server end correspondence do not match, then sd_client will with or the SHA1 value of the result that operates and result's mid-1 piece be sent to sd_server together.The SHA1 value of the SHA1 value of the piece of the same or operating result mid-1 that sd_server sends sd_client and the corresponding blocks of server end compares.If the SHA1 value of piece is different, then the sd_server SHA1 value that reads piece and read piece from the SHA1 listing file of correspondence from the virtual disk of server end is videoed again sends to sd_client then; Otherwise, do not send.
(6) the sd_client piece that will receive is saved among the local SVD, the position 1 of piece correspondence will be received among the shadow GBB, the SHA1 value that receives piece is saved in the corresponding shadow SHA1 listing file, with position 1 corresponding in the active block bitmap in the shadow SHA1 listing file, upgrade the active block number in the shadow SHA1 listing file.
3.4.3 per minute distributes a kind of software, the sd_client of user side is arranged to markers in the shadow SHA1 listing file of software correspondence and total block data identical with server end, and integrity flag is put 1.
3.5 at user side, the user starts virtual machine, uses the software at local cache.Concrete steps are as follows:
3.5.1VMM the block device driver module in user side buffer memory initialization submodule at first carry out user side buffer memory initialization procedure:
(1) sd_client obtains software another name, markers, the total block data of all available software from server end.
(2) if a kind of shadow SHA1 listing file of software correspondence does not exist at user side, then the block device driver module is created corresponding shadow SHA1 listing file and its empty sign is put 1, deletes the SHA1 listing file of unloaded software.
(3) the block device driver module is checked the shadow SHA1 listing file of every kind of software one by one.Check whether markers field wherein is identical with server end,, the markers and the total block data of shadow SHA1 listing file are arranged to identical, remove integrity flag and active block number, empty the active block bitmap with server end if markers is inequality.If empty flag set, and the active block number is removed empty sign greater than 10% of total block data.
(4) if exist different software of markers or WVD not to exist, then from SVD with COW (Copy-on-Write) pattern derivation work virtual disk WVD (Work Virtual Disk).
3.5.2VMM start virtual machine from WVD, the user uses from virtual machine at the local cache or the software of buffer memory not.
In the virtual machine operational process, the piece submodule of getting as required in the block device driver module obtains the virtual machine request but not at local cache or the piece that has been updated at server end from server end.Detailed process is as follows:
(1) get the piece submodule as required piece number is sent the piece request of getting as parameter to sd_client, sd_client transmits the piece request of getting to the sd_server of server end.
(2) after sd_server receives and gets the piece request, from the virtual disk reflection, read the piece of request, the software numbering of software under this piece of inquiry from GDB, read the SHA1 value of piece again from the SHA1 listing file of affiliated software correspondence, the software of the piece that will read, affiliated software numbering, piece SHA1 value send to the sd_client of user side at last.
(3) the sd_client piece that will receive is given and is got the piece submodule as required, then this piece is write SVD, position 1 with this piece correspondence among the shadow GBB, the SHA1 value of this piece is write in the shadow SHA1 listing file of affiliated software correspondence, position 1 with this piece correspondence in the active block bitmap in the shadow SHA1 listing file increases progressively the active block number.
(4) if the total block data of active block number in the shadow SHA1 listing file and software equates that sd_client puts 1 with integrity flag; If empty flag set, and the active block number is removed empty sign greater than 10% of total block data.
In the virtual machine operational process, when piece n on the virtual disk was read in request, the detailed process that the block device driver module reads piece was as follows:
(1) after VMM receives the request of virtual machine to piece n, whether set of corresponding position in the bitmap block of block device driver module inquiry WVD is if piece n is then directly read in set from WVD; Otherwise, whether set of corresponding position among the inquiry shadow GBB.The bitmap block of WVD is the data structure identical with GBB, is used for writing down virtual machine and writes piece among the WVD at the user side operational process.Each piece is a corresponding position (bit) in bitmap block, if WVD comprises this piece, then corresponding position is put 1, otherwise is 0.
(2) as if not set, then the block device driver module obtains piece n by the method for getting piece as required; Otherwise the software under this piece of block device driver module inquiry GDB is made as A.
(3) integrity flag in the shadow SHA1 listing file of block device driver module query software A.If integrity flag set, then the block device driver module directly reads piece n from SVD; Otherwise, the whether set of position of piece n correspondence in the active block bitmap in the shadow SHA1 listing file of block device driver module query software A.
(4) as if set, then the block device driver module directly reads piece n from SVD; Otherwise the block device driver module reads the SHA1 value of piece n from the shadow SHA1 listing file of A, and compares by the SHA1 value of sd_client and this piece of server end.
(5) if the SHA1 value is identical, then the block device driver module directly reads piece n from SVD, with corresponding position 1 in the active block bitmap in the shadow SHA1 listing file of A, increases progressively the active block number; If the SHA1 value is inequality, then the block device driver module obtains piece n again by the method for getting piece as required.
In the virtual machine operational process, all write operations carry out at WVD.After VMM received the write request of virtual machine to piece n, the block device driver module write WVD with piece n, then with corresponding position 1 in the bitmap block of WVD.
Compared with prior art, adopt the present invention can reach following technique effect:
1. the present invention expands virtual machine manager VMM, to support at the logical division of single large scale virtual disk reflection and the distribution as required of software.The user interactive module of expanding among the VMM is distributed unique software numbering and software another name to the every kind of software that is installed in the virtual disk according to erection sequence, and utilizes software numbering and another name that the software that is installed in the virtual disk is managed.The block device driver module of expanding among the VMM is by having introduced software block bitmap SBB, to write down the information that every kind of software takies disk block, thereby be implemented on the basic granularity of single software the logical division of single virtual disk image, avoided based on the physical segmentation method of COW disk bring in the problem aspect performance, virtual machine image management and the software administration.Expand in the block device driver module get as required the piece submodule make VMM can virtual disk not total caching under the situation of user side, guarantee the normal operation of virtual machine.
2. the present invention utilizes the virtual machine manager VMM of expansion, passes through the software block bitmap file SBB of the shared disk block of every kind of software of record to realize the logical division to traditional single virtual disk image at server end.In the virtual machine installation process, the automatic distribution software numbering of order that user interactive module is installed according to software is provided with corresponding software another name, the start and end time point that software is installed by the user interactions interface.In the software installation process, the block device driver module is recorded in the information of the disk block that software takies among the bitmap block file SBB of software.When carrying out software upgrading, user interactive module is switched current software numbering to the software numbering that is updated the software correspondence, carries out normal software upgrading process then.When uninstall, carry out after the normal uninstall process the corresponding SBB of user interactive module deletion.
3. the present invention utilizes the SBB of overall piece distribution bitmap GDB and software, mutual by server end service routine sd_server and user side CLIENT PROGRAM sd_client, the disk block that can only the required software of user be taken (piece of set among the SBB) is sent to user side, thereby realizes software dispatch desirably.At the SHA1 of server end listing file with at the shadow SHA1 of user side listing file, can avoid transmitting those by comparison software, thereby reduce the expense of software dispatch at user side buffer memory and the piece that is not updated.
4. the present invention gets the mode that piece and local cache combine as required in the user side utilization and provides the disk access service for user virtual machine pellucidly.Before using the software that obtains from server end, at first derive from work virtual disk WVD to preserve of the modification of virtual machine run duration to virtual disk.In the virtual machine activation process, the state of inspection of the block device driver module of VMM and initialization user side buffer memory.In the virtual machine operational process, the block device driver module directly reads the piece of latest edition from SVD; Otherwise the piece submodule of getting as required in the block device driver module obtains user side not buffer memory or the piece that has been updated from server end.
In sum, the present invention utilizes the virtual machine manager of expansion, by writing down the disk block that takies when every kind of software is installed respectively traditional single large-sized virtual disk reflection logically is divided into a plurality of undersized disk block set, be distributed to the user then desirably, to reduce the expense of software dispatch, accelerate the speed of Software deployment.Experiment shows, low expense under the virtual support machine environment of the present invention, software dispatch as required.
Description of drawings
Fig. 1 is the primary clustering figure of typical virtual machine system.
Fig. 2 is the main submodule of the present invention to the user interactive module expansion of VMM.
Fig. 3 is the main submodule of the present invention to the block device driver module expansion of VMM.
Fig. 4 is a general flow chart of the present invention.
Fig. 5 is the process flow diagram of the present invention's second step server end single virtual disk image logical division.
Fig. 6 is based on the process flow diagram of software dispatch as required of virtual disk reflection logical division in the present invention the 3rd step.
Fig. 7 is the process flow diagram that user side of the present invention uses software as required.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further details.
Fig. 4 is a general flow chart of the present invention.Mainly comprise following 4 steps:
1. virtual machine manager VMM is carried out the function expansion.Expansion to VMM is included in software numbering and another name management submodule, software numbering and another name administration order and the software administration order of expanding in the user interactive module of VMM.In the block device driver module of VMM, expand software block bitmap read-write submodule, overall piece distribution bitmap read-write submodule, user side buffer memory initialization submodule, got piece submodule and SHA1 listing file management submodule as required.Software numbering and another name management submodule are called according to erection sequence distribution software numbering and software the software that is installed in the virtual disk; Utilize software numbering and software another name, the user interactions interface of VMM is carried out installation/renewal/management roles such as unloading to the software that is installed in the virtual disk.The block device driver module of VMM is by introducing software block bitmap SBB, writing down the information that every kind of software takies disk block, thereby is implemented on the basic granularity of single software logical division to the single virtual disk image.In the block device driver module get as required the piece submodule can virtual disk not total caching under the situation of user side, guarantee the normal operation of virtual machine.
2. at server end the single virtual disk image is carried out logical division.Utilize the virtual machine manager VMM of expansion, in server end virtual machine installation process, realize logical division the single virtual disk image by writing down the disk block that takies when every kind of software is installed.In the virtual machine installation process, client operating system at first is installed, the software numbering that the user interactive module of VMM is distributed is defaulted as 1.In the installation process of follow-up other every kind software, user interactive module is provided with corresponding software another name, the start and end time point that software is installed according to the automatic distribution software numbering of the order of installing by the user interactions interface.In the software installation process, the disk block that the block device driver module takies software is recorded among the SBB of software, and upgrades overall piece distribution bitmap GDB with the software numbering.During software upgrading, user interactive module is at first switched current software numbering to the software numbering that is updated software, carries out normal software upgrading process then.During uninstall, carry out after the normal uninstall process the corresponding SBB of user interactive module deletion.After the virtual machine installation, the block device driver module be every kind of software generate comprise its take disk block SHA1 value the SHA1 listing file, to avoid re-transmission in the software distribution process at the piece of user side buffer memory.
3. software dispatch as required.Utilize the SBB of overall piece distribution bitmap GDB and software, server end service routine sd_server and user side CLIENT PROGRAM sd_client, by pushing fully and two kinds of patterns of interactive propelling movement, the disk block that the required software of user is taken is sent to user side, thereby realizes software dispatch desirably.SHA1 value by comparison block to be avoiding transmitting those at the piece of user side buffer memory, thereby reduces the expense of software dispatch.
4. user side uses software as required.At user side, the block device driver module of VMM provides the disk access service for user virtual machine pellucidly by the mode of getting piece and local cache as required and combining.At first derive from work virtual disk WVD to preserve of the modification of virtual machine run duration to virtual disk.In the virtual machine operational process, the block device driver module of VMM directly reads at the user side buffer memory from SVD and is the piece of latest edition; Otherwise the piece submodule of getting as required in the block device driver module obtains not at local cache or the piece that has been updated from server end.
Fig. 5 is the process flow diagram of server end single virtual disk image logical division among the present invention.Main process is:
1. establishment virtual disk.
2. installation client operating system: at first the user interactions interface by VMM is provided with software and is numbered 1, and the software another name is os; The block device driver module of VMM is created the SBB of client operating system; Start virtual machine, begin to install client operating system; The block device driver module upgrades GBB, GDB and SBB in the installation process; After the installation, the user interactions interface by VMM is provided with current software and is numbered 255; Restart virtual machine.
3. the user interactions interface notice VMM by VMM begins software installation/renewal/uninstall process.
4. software installation/renewal/unloading.In the software administration task of server end executive software installation/renewal/unloading,, realize logical division based on single software granularity to the single virtual disk by writing down the disk block that takies when every kind of software is installed respectively.
Software installation process is as follows:
(1) the user interactions interface interchange software of VMM numbering and management submodule are provided with the another name of software, and are installed software distribution software numbering.
(2) the block device driver module of VMM is created the SBB of software.
(3) executive software installation process in virtual machine, the block device driver module upgrades GBB, SBB and GDB simultaneously.The software upgrading process is as follows:
(1) the user interactions interface setting by VMM is updated the software another name of software and the more new model (full dose renewal/incremental update) of software.
(2) if full dose is upgraded, then the block device driver module of VMM at first empties SBB.
(3) update software, the block device driver module upgrades GBB, SBB and GDB simultaneously.
The software uninstall process is as follows:
(1) the user interactions interface by VMM is provided with the software another name of unloaded software.
(2) uninstall.
(3) the software that unloaded software is set of the user interactions interface by VMM is numbered stand-by software numbering and puts sky software another name, and the block device driver module is deleted the SBB of unloaded software.
5. after software installation/renewal/uninstall process finished, the user interactions interface interchange software administration order of VMM notice VMM software installation/renewal/uninstall process finished, and software numbering and another name management submodule switch current software numbering to 255.
6. if also have software installation/renewal/unloading task, change step 3.
7. generate and be mounted/the SHA1 listing file of update software.
Fig. 6 is based on the process flow diagram of software dispatch as required of virtual disk reflection logical division among the present invention.Main process is:
1.GDB transmission: user side CLIENT PROGRAM sd_client is transferred to user side with the GDB of server end.
2. querying server end available software: the sd_client of user side is to server end service routine sd_server inquiry available software, and sd_server returns the software another name tabulation of available software to sd_client.
3. the sd_client of user side submits software asks to the sd_server of server end; Simultaneously sd_client is also with the markers in the shadow SHA1 listing file of the software that the user asks of user side buffer memory, empty indicate and integrity flag sends to sd_server.
4. the SBB and the SHA1 listing file of the sd_server software that consumer positioning is asked of server end send markers, the total block data of software that the user asks to sd_client.
5. to each software of request, sd_client checks that it is in user side buffer memory mistake whether.If a kind of software is at user side buffer memory not fully, i.e. empty flag set in its SHA1 listing file, then sd_server and sd_client send to user side by the disk block that complete push mode takies software that the user asks; Otherwise, only send not at user side buffer memory or the piece that is updated by interactive push mode.
Complete push mode: service routine sd_server is according to the SBB of software, and piece that reading software takies from the virtual disk reflection and the SHA1 value that reads piece from the SHA1 listing file of correspondence send to CLIENT PROGRAM sd_client then.
Interactive push mode comprises following steps:
(1) sd_server and sd_client initialization enter interactive push mode.
(2) sd_server is according to the SBB of software, and the piece that software is taken piece number sends to sd_client.
(3) which piece the active block bitmap in the shadow SHA1 listing file of the piece that sends according to server end of sd_client number and software judges not at the user side buffer memory, and notice sd_server.
(4) the sd_server general does not directly send to sd_client at the piece of user side buffer memory.
(5) if the markers in the shadow SHA1 listing file of software and the markers of server end correspondence do not match, then sd_client sends to sd_server with this software in the SHA1 of user side cache blocks value.
(6) the sd_server SHA1 value of cache blocks and server end whether identical more.If the SHA1 value of a piece is different, then from the virtual disk of server end, reads this piece again, and send to user side; Otherwise, do not send.
6.sd_client the piece that will receive is saved among the SVD, and the SHA1 value of piece is saved in the corresponding shadow SHA1 listing file, upgrades active block bitmap, active block number in GBB and the shadow SHA1 listing file.
7. every transmission finishes a kind of software, and sd_client is arranged to markers in the shadow SHA1 listing file of correspondence and total block data identical with server end, and integrity flag is put 1.
8. continue the software of down a kind of user's request of distribution, change step 5.
Fig. 7 is the process flow diagram that user side of the present invention uses software as required.Main process is:
1. user side starts virtual machine, and the block device driver module of VMM obtains software another name, markers, the total block data of all available software from server end by sd_client.
2. the block device driver module checks whether the shadow SHA1 listing file of every kind of software correspondence exists; If do not exist, then create shadow SHA1 listing file, and the sky sign is put 1; Delete the SHA1 listing file of unloaded software correspondence.
3. the block device driver module checks whether the markers of each shadow SHA1 listing file is identical with server end; If the markers difference, the markers and the total block data of shadow SHA1 listing file are arranged to identical with server end, remove integrity flag and active block number, empty the active block bitmap; If empty flag set, and the active block number is removed empty sign greater than 10% of total block data.
4. if exist different software of markers or WVD not to exist, then the block device driver module derives from new WVD.
5. in the virtual machine operational process, if write piece, then the block device driver module directly writes WVD with piece; If read piece, then at first inquire about among the WVD the whether set of corresponding position; If piece is then directly read in set from WVD.
6. if corresponding not set of position among the WVD, then whether set of corresponding position among the block device driver module inquiry GBB.If not set, then the piece submodule of getting as required in the block device driver module obtains piece from server end, changes step 12.
7. if the position set of correspondence among the GBB, the then software under this piece of block device driver module inquiry GDB.
8. the integrity flag under the block device driver module is inquired about in the SHA1 listing file of software.If integrity flag set, then the block device driver module directly reads this piece from SVD.
9. if not set of integrity flag, corresponding position in the active block bitmap in the block device driver module inquiry SHA1 listing file then.If set, then the block device driver module directly reads piece from SVD.
10. as if not set of position corresponding in the active block bitmap, then the block device driver module compares the SHA1 value of this piece correspondence in the shadow SHA1 listing file and the SHA1 value of this piece of server end by sd_client.If the SHA1 value is identical, then the block device driver module directly reads this piece from SVD.
11. if the SHA1 value of piece is different, then the piece submodule of getting as required of block device driver module obtains piece from server end.
12. the SHA1 value of the piece that the sd_client of user side will obtain from server end writes the local shadow SHA1 listing file, and corresponding position in the set active block bitmap, increases progressively the active block number.
13., change step 5 if also have read.
Claims (3)
1. demand software distribution method based on virtual disk reflection logical division, it is characterized in that adopting the system architecture of client/server, server end is stored the virtual disk reflection of all virtual machines, and by writing down the disk block that takies when every kind of software is installed respectively traditional single virtual disk image logically is divided into a plurality of disk block set; The CLIENT PROGRAM of the software dispatch service routine of server end and user side is gathered to the disk block of user side distributing software correspondence by the mutual of Client desirably according to user's software requirement then, and concrete steps are:
The first step virtual machine manager VMM (Virtual Machine Monitor) is carried out the function expansion, and the VMM after will expanding is deployed to server end and client;
1.1 the module that expansion is numbered and names the every kind of software that is installed in the virtual disk in the user interactive module of VMM; Concrete extended method is as follows:
(1) increase software numbering and another name management submodule in user interactive module, this submodule is to the software numbering and another name distributes, setting, modification, deletion and query manipulation;
(2) increase software numbering and another name administration order in the user interactions interface, these command calls software numberings and another name management submodule are realized corresponding software numbering and another name management function;
(3) in the user interactions interface, increase the software administration order, these orders are used to be provided with the correlation parameter under software administration mode and the every kind of pattern, and call the automatic management function that the function of software numbering and another name management submodule is come executive software numbering and another name;
1.2 expansion is to software block bitmap SBB (Software Block Bitmap) and overall piece distribution bitmap GDB (Global block Distribution Bitmap), user side buffer memory function of initializing, get the support of piece function as required in the block device driver module of VMM; Concrete extended method is as follows:
(1) increase software block bitmap SBB read-write submodule in the block device driver module, software block bitmap SBB is a file on the host, is used to write down the disk block that every kind of software installing on the virtual disk takies;
(2) increase overall piece distribution bitmap GDB read-write submodule in the block device driver module, overall piece distribution bitmap GDB is a file on the host, is used to write down the software numbering of the affiliated software of each disk block on the virtual disk;
(3) in the block device driver module, increase user side buffer memory initialization submodule;
(4) the piece submodule is got in increase as required in the block device driver module;
(5) in the block device driver module, increase SHA1 listing file management submodule;
In second step, server end carries out logical division to the single virtual disk image; Logical division is meant software is installed in the single virtual disk image, and the software block bitmap file SBB by every kind of software correspondence with the single virtual disk from being divided into a plurality of disk blocks set in logic, comprise the disk block that software takies in each disk block set, step is as follows:
2.1 establishment virtual disk: utilize the virtual machine manager of expansion to create the single virtual disk image file of virtual machine, and generate empty overall piece distribution bitmap GDB;
2.2 installation client operating system;
2.3 install, upgrade, unload application software;
2.4 generate the SHA1 listing file of software: at server end, for every kind of software generates a SHA1 listing file;
In the 3rd step, carry out software dispatch as required; Server end is according to the software block bitmap SBB of every kind of software, and the disk block that the required software of user is taken is transferred to user side, thereby realizes the distribution as required of software, and step is as follows:
3.1 the CLIENT PROGRAM sd_client of user side copies the overall piece distribution bitmap GDB of server end to user side;
3.2 the available software of the sd_client querying server end of user side, the service routine sd_server of server end returns the software another name tabulation of available software;
3.3 the sd_client of user side submits user's software requirement to the sd_server of server end, be the tabulation of software another name, sd_client sends to sd_server with the markers in the shadow SHA1 listing file of the software of asking of user side buffer memory, empty sign, integrity flag simultaneously;
3.4 the sd_server of server end is according to the SBB of software that the user asks, the disk block that software that the user asks is taken sends to the sd_client of user side; Sd_client is saved in the disk block that receives among the shadow virtual disk SVD (Shadow Virtual Disk) of user side, uses for the user side virtual machine.
2. a kind of demand software distribution method based on virtual disk reflection logical division according to claim 1 is characterized in that software installation, renewal, uninstall process are as follows:
Software installation process is as follows:
(1) the user interactions interface interchange software of VMM numbering and management submodule are provided with the another name of software, and are installed software distribution software numbering;
(2) the block device driver module of VMM is created the SBB of software;
(3) executive software installation process in virtual machine, the block device driver module upgrades GBB (Global Block Bitmap), SBB and GDB simultaneously;
The software upgrading process is as follows:
(1) the user interactions interface setting by VMM is updated the software another name of software and the more new model of software, full dose renewal/incremental update;
(2) if full dose is upgraded, then the block device driver module of VMM at first empties SBB;
(3) update software, the block device driver module upgrades GBB, SBB and GDB simultaneously;
The software uninstall process is as follows:
(1) the user interactions interface by VMM is provided with the software another name of unloaded software;
(2) uninstall;
(3) the software that unloaded software is set of the user interactions interface by VMM is numbered stand-by software numbering and puts sky software another name, and the block device driver module is deleted the SBB of unloaded software.
3. a kind of demand software distribution method based on virtual disk reflection logical division according to claim 1 is characterized in that complete push mode, interactive push mode step are:
Complete push mode step:
Service routine sd_server is according to the SBB of software, and piece that reading software takies from the virtual disk reflection and the SHA1 value that reads piece from the SHA1 listing file of correspondence send to CLIENT PROGRAM sd_client then;
Interactive push mode comprises following steps:
(1) sd_server and sd_client initialization enter interactive push mode;
(2) sd_server is according to the SBB of software, and the piece that software is taken piece number sends to sd_client;
(3) which piece the active block bitmap in the shadow SHA1 listing file of the piece that sends according to server end of sd_client number and software judges not at the user side buffer memory, and notice sd_server;
(4) sd server general does not directly send to sd_client at the piece of user side buffer memory;
(5) if the markers in the shadow SHA1 listing file of software and the markers of server end correspondence do not match, then sd_client sends to sd_server with this software in the SHA1 of user side cache blocks value;
(6) the sd_server SHA1 value of cache blocks and server end whether identical more is if the SHA1 value of piece difference then reads this piece again, and sends to user side from the virtual disk of server end; Otherwise, do not send.
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| CN103051592B (en) * | 2011-10-11 | 2016-01-20 | 中国科学院研究生院 | A kind of virtualized network environment construction method and system |
| CN104216759B (en) * | 2014-08-27 | 2017-08-04 | 华为技术有限公司 | A kind of method for the logic magnetic disc for generating virtual machine, and device |
| CN104639614A (en) * | 2015-01-05 | 2015-05-20 | 广州杰赛科技股份有限公司 | Software distributing method, system and server |
| CN104618453A (en) * | 2015-01-05 | 2015-05-13 | 广州杰赛科技股份有限公司 | Software distribution method, system and server |
| CN108089890B (en) * | 2016-11-21 | 2019-09-20 | 杨正 | It is a kind of that operation method and system are applied based on disk |
| CN108733383B (en) * | 2018-03-30 | 2022-04-08 | 广东睿江云计算股份有限公司 | Method and system for loading optical disk ISO file into XenServer virtual machine |
| US10540185B1 (en) * | 2019-01-11 | 2020-01-21 | Liqid Inc. | Software deployment in disaggregated computing platforms |
| US11954326B2 (en) | 2019-02-01 | 2024-04-09 | Liqid Inc. | Memory device instantiation onto communication fabrics |
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