CN109885398B

CN109885398B - Distribution method and device of distributed PXE server

Info

Publication number: CN109885398B
Application number: CN201910041374.0A
Authority: CN
Inventors: 郭进先; 苏楠; 张鑫
Original assignee: Shanghai Zstack Information Technology Co ltd
Current assignee: Shanghai Yunzhou Technology Co.,Ltd.
Priority date: 2019-01-16
Filing date: 2019-01-16
Publication date: 2020-10-13
Anticipated expiration: 2039-01-16
Also published as: CN109885398A

Abstract

The invention aims to provide a distribution method and equipment of a distributed PXE server, wherein different PXE clients access different PXE servers by controlling a DHCP service switch on the PXE server; the management node schedules the PXE servers, and the other stages can provide services in parallel except for the stage of IP allocation, so that the DHCP service with less occupied time provides services in series, the TFTP service with more occupied time provides services in parallel, and the PXE servers simultaneously provide different PXE services in parallel in a two-layer network.

Description

Distribution method and device of distributed PXE server

Technical Field

The invention relates to the field of computers, in particular to a distribution method and equipment of a distributed PXE server.

Background

PXE (Pre-boot Execution Environment), Pre-boot Execution Environment. Is a protocol designed by Intel that enables a computer to boot over a network. The protocol is divided into a client (client) and a server (server), the client application (PXE client) is stored in a ROM of the network card, when the computer is booted through a network, the BIOS calls the client application (PXE client) into the memory for execution, and the client application (PXE client) can load and run an operating system placed at a far end from the server (server) through the network according to the selection of a user.

Current applications are primarily the installation of operating systems and diskless workstations over a network. The general environment server and client end are in a two-layer network, when the client end is started by network, it can broadcast an address request, all computers in the whole two-layer network can receive the address request, after the server receives the request, it can distribute IP address to the client end, after the server confirms again, the client end can use the distributed IP to communicate with the server. If multiple servers exist in a network, multiple servers will assign IP to clients, which can lead to confusion and ultimately to PXE services being unavailable. In practice, there will only be one PXE server within a two-tier network.

In current applications, the PXE service is mainly used to install an operating system over a network or as a server of a diskless workstation. When the system is used for installing an operating system in a network, only one system is generally installed at the same time; when used as a diskless workstation, the same content is pushed for multiple workstations, and too many diskless workstations are serviced, which may be correspondingly slow.

Because only one PXE server exists, if a plurality of clients request services at the same time, TFTP service needs to simultaneously satisfy the plurality of clients, pressure is high, and response speed is slow.

If a plurality of client terminals need to install different operating systems, complex configuration needs to be carried out on the PXE server, and boot files needed by the different operating systems are pushed according to the MAC addresses of the network cards of the client terminals.

Because only one PXE server exists, when the server fails and cannot provide services, no standby server can be used as a substitute, and when the pressure becomes high and correspondingly becomes slow, no other server can share the pressure.

Disclosure of Invention

The invention aims to provide a method and equipment for distributing a distributed PXE service.

According to an aspect of the present invention, there is provided a method for distributing a distributed PXE service, the method including:

step S1, a PXE server pool is formed by obtaining a plurality of PXE servers, each PXE server in the PXE server pool is marked as free, each PXE server in the PXE server pool is initialized, so that a DHCP service is closed on each PXE server, and a TFTP service is opened;

step S2, an IP/MAC address pairing table is created for subsequent recording of the MAC address and the allocated IP address of the PXE client;

step S3, checking whether there is a PXE server marked as idle in the PXE server pool and all the DHCP services on the PXE servers are closed, taking one PXE server out of the idle PXE server, starting the DHCP service of the taken PXE server, obtaining a request of the PXE client, obtaining a MAC address corresponding to the PXE client based on the request, checking whether the MAC address corresponding to the PXE client is already recorded in the IP/MAC address pairing table,

if not, in step S4, after the taken-out PXE server allocates a corresponding IP address to the PXE client through the DHCP service, closing the DHCP service, and providing the service of installing the system for the PXE client through the TFTP service of the taken-out PXE server;

step S5, recording the MAC address of the PXE client and the allocated corresponding IP address into the IP/MAC address pairing table, and modifying the selected PXE server mark from idle to service.

Further, in the above method, after modifying the mark of the selected PXE server from idle to in-service in step S5, the method further includes:

and after the PXE client installation system is completed, the taken out marks of the PXE server are changed from the service middle to idle and then are put into the PXE server pool again.

Further, in the above method, after the step S5, the method further includes:

step S3 to step S5 are executed in a loop.

Further, in the above method, in step S5, the recording the MAC address of the PXE client and the allocated corresponding IP address in the IP/MAC address matching table includes:

recording the MAC address of the PXE client, the allocated corresponding IP address and information of a PXE server correspondingly providing services into the IP/MAC address matching table;

after checking whether the MAC address corresponding to the PXE client is already recorded in the IP/MAC address pairing table, the method further includes:

if yes, the IP address corresponding to the MAC address and the information of the PXE server correspondingly providing the service are sent to the PXE client side according to the IP/MAC address matching table.

According to another aspect of the present invention, there is also provided a distribution apparatus for a distributed PXE server, wherein the apparatus includes:

the device comprises a first device, a second device and a third device, wherein the first device is used for acquiring a PXE server pool formed by a plurality of PXE servers, marking each PXE server in the PXE server pool as idle, initializing each PXE server in the PXE server pool so as to close a DHCP service on each PXE server and open a TFTP service;

the second device is used for creating an IP/MAC address pairing table for subsequent recording of the MAC address of the PXE client and the allocated IP address;

a third device, configured to check whether there is a PXE server marked as idle in the PXE server pool, and all the DHCP services on the PXE servers are closed, take out one PXE server from the idle PXE server, start the DHCP service of the taken-out PXE server, obtain a request of a PXE client, obtain a MAC address corresponding to the PXE client based on the request, check whether the MAC address corresponding to the PXE client is already recorded in the IP/MAC address pairing table,

a fourth device, configured to close the DHCP service of the taken-out PXE server after the MAC address corresponding to the PXE client is not recorded in the IP/MAC address matching table and the taken-out PXE server allocates the corresponding IP address to the PXE client through the DHCP service of the PXE server, and the taken-out PXE server provides a service for installing a system for the PXE client through the TFTP service of the PXE server;

and the fifth device is used for recording the MAC address of the PXE client and the allocated corresponding IP address into the IP/MAC address matching table and modifying the mark of the selected PXE server from idle to service.

Further, in the foregoing apparatus, the fifth device is further configured to, after the PXE client installation system is completed, modify the taken out marker of the PXE server from in-service to idle, and then place the marker in the PXE server pool again.

Further, in the above apparatus, the third to fifth means are sequentially executed in a cycle.

Further, in the foregoing apparatus, the fifth means is configured to record the MAC address of the PXE client, the allocated corresponding IP address, and information corresponding to a PXE server providing a service in the IP/MAC address matching table;

the device further comprises a sixth device, configured to send, to the PXE client, the IP address corresponding to the MAC address of the PXE client and information of the PXE server providing the service correspondingly according to the IP/MAC address matching table when the MAC address corresponding to the PXE client is already recorded in the IP/MAC address matching table.

According to another aspect of the present invention, there is also provided a computing-based device, comprising:

a processor; and

a memory arranged to store computer executable instructions that, when executed, cause the processor to:

According to another aspect of the present invention, there is also provided a computer-readable storage medium having stored thereon computer-executable instructions, wherein the computer-executable instructions, when executed by a processor, cause the processor to:

Compared with the prior art, the invention realizes that different PXE clients access different PXE servers by controlling the DHCP service switch on the PXE server; the management node schedules the PXE servers, and the other stages can provide services in parallel except for the stage of IP allocation, so that the DHCP service with less occupied time provides services in series, the TFTP service with more occupied time provides services in parallel, and the PXE servers simultaneously provide different PXE services in parallel in a two-layer network.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a flowchart illustrating a distribution method of a distributed PXE server according to an embodiment of the present invention.

The same or similar reference numbers in the drawings identify the same or similar elements.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

In a typical configuration of the present application, the terminal, the device serving the network, and the trusted party each include one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-transitory computer readable media (transient media), such as modulated data signals and carrier waves.

As shown in fig. 1, the present invention provides a method for distributing a distributed PXE server, where the method includes:

here, a plurality of PXE servers are provided in the same two-layer network, and during initialization, a DHCP (Dynamic Host Configuration Protocol) service on the PXE server is not started, but only a TFTP (simple File Transfer Protocol) service is started;

here, a blank IP/MAC address pairing table may be created by the management node for subsequent recording of the MAC address and the allocated IP address of the PXE client;

here, the management node may check whether there is a free server in the PXE server pool and check whether there is a PXE server providing a DHCP service in the network, and if there is a free PXE server and there is no PXE server providing the DHCP service in the network, may randomly select a server in one PXE server pool, start the DHCP service of the PXE server, wait for the request of the PXE client, check whether there is a recorded MAC address of the PXE client in the IP/MAC address pairing table through the DHCP service;

when the IP/MAC address matching table does not record the MAC address of the PXE client, the taken-out PXE server allocates the IP address for the PXE client, then the taken-out PXE server DHCP service is closed, in addition, the taken-out PXE server can send the allocated IP address and the MAC address to a management node for recording, and the taken-out PXE server simultaneously provides TFTP service for the PXE client so that the PXE client can complete installation of the system;

Here, the PXE server may be marked as in-service by the management node including the IP address and MAC in an IP/MAC address pair table.

The invention realizes that different PXE clients access different PXE servers by controlling the DHCP service switch on the PXE server; the management node schedules the PXE servers, and the other stages can provide services in parallel except for the stage of IP allocation, so that the DHCP service with less occupied time provides services in series, the TFTP service with more occupied time provides services in parallel, and the PXE servers simultaneously provide different PXE services in parallel in a two-layer network.

In an embodiment of the distribution method for the distributed PXE server of the present invention, after modifying the mark of the selected PXE server from idle to service, the method further includes:

Here, when the installation of the PXE client is completed and the PXE service is no longer needed, the management node recovers the corresponding PXE server, rejoins the PXE server in the PXE server pool marked as free, and waits for re-scheduling.

In an embodiment of the distribution method for the distributed PXE server of the present invention, in step S5, after recording the MAC address of the PXE client and the allocated corresponding IP address in the IP/MAC address pairing table, and modifying the selected marker of the PXE server from idle to service, the method further includes:

and circularly executing the steps S3 to S5 to realize the distribution of different PXE servers for a plurality of different PXE clients.

In an embodiment of the distribution method of the distributed PXE server of the present invention, in step S5, the recording the MAC address of the PXE client and the allocated corresponding IP address into the IP/MAC address matching table includes:

Here, when it is checked that the MAC address corresponding to the PXE client is already recorded in the IP/MAC address matching table, the IP address corresponding to the MAC address of the PXE client and information of the PXE server providing the service correspondingly may be provided to the PXE client in time according to the IP/MAC address matching table.

a processor; and

For details of embodiments of each device and storage medium of the present invention, reference may be made to corresponding parts of each method embodiment, and details are not described herein again.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

It should be noted that the present invention may be implemented in software and/or in a combination of software and hardware, for example, as an Application Specific Integrated Circuit (ASIC), a general purpose computer or any other similar hardware device. In one embodiment, the software program of the present invention may be executed by a processor to implement the steps or functions described above. Also, the software programs (including associated data structures) of the present invention can be stored in a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. Further, some of the steps or functions of the present invention may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.

In addition, some of the present invention can be applied as a computer program product, such as computer program instructions, which when executed by a computer, can invoke or provide the method and/or technical solution according to the present invention through the operation of the computer. Program instructions which invoke the methods of the present invention may be stored on a fixed or removable recording medium and/or transmitted via a data stream on a broadcast or other signal-bearing medium and/or stored within a working memory of a computer device operating in accordance with the program instructions. An embodiment according to the invention herein comprises an apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to perform a method and/or solution according to embodiments of the invention as described above.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims

1. A method for distributing a distributed PXE server, wherein the method comprises the following steps:

2. The method as claimed in claim 1, wherein in step S5, after modifying the selected PXE server mark from idle to in-service, the method further includes:

3. The method according to claim 1, wherein after step S5, further comprising:

step S3 to step S5 are executed in a loop.

4. The method as claimed in any one of claims 1 to 3, wherein in step S5, the recording the MAC address of the PXE client and the allocated corresponding IP address into the IP/MAC address pairing table includes:

5. An apparatus for distributing a distributed PXE server, the apparatus comprising:

6. The apparatus as claimed in claim 5, wherein the fifth means is further configured to, after the PXE client installation system is completed, modify the taken out PXE server mark from in-service to idle and then re-place the mark in the PXE server pool.

7. The apparatus of claim 5, wherein the third through fifth means are performed sequentially in a loop.

8. The apparatus as claimed in any one of claims 5 to 7, wherein the fifth means is configured to record the MAC address of the PXE client, the allocated corresponding IP address, and information corresponding to the serving PXE server in the IP/MAC address pairing table;

9. A computing-based device, comprising:

a processor; and

10. A computer-readable storage medium having computer-executable instructions stored thereon, wherein the computer-executable instructions, when executed by a processor, cause the processor to: