CN115225193B - BMC time synchronization method, system, device and readable storage medium - Google Patents

Abstract

The invention provides a BMC time synchronization method, a system, a device and a readable storage medium, wherein the method comprises the following steps: adding a time synchronization command in the local BMC, and defining a data format of a time request and a reply thereof; when the local BMC cannot acquire the NTP time through the NTP server, the local BMC periodically transmits a time request to a plurality of BMCs; the BMC receiving the time request sends reply data to the local BMC after passing the request verification; after receiving the reply, the local BMC performs time synchronization verification, and after the verification passes, the corresponding BMC is used as a time synchronization candidate BMC; according to each communication duration, the optimal BMC is screened out from all time synchronization candidate BMCs; the time of the optimal BMC is set as the time of the native BMC. The invention can effectively reduce the cost of BMC time synchronization and improve the accuracy of BMC time.

Description

A BMC time synchronization method, system, device and readable storage medium

Technical Field

The present invention relates to the field of computer technology, and more particularly to a BMC time synchronization method, system, device and readable storage medium.

Background technique

BMC (Baseboard Management Controller) is a small operating system independent of the server system. Its function is to facilitate remote management, monitoring, deployment, and restart of the server. BMC starts running when the power is turned on. It is not affected by the server power on and off and is independent of the business system. BMC time plays an important role in server monitoring and logging. However, BMC does not have a separate battery and needs to synchronize time with other components.

In the prior art, when the BMC is started, it needs to synchronize the time from the ME (Management Engine Interface). When the NTP server is turned on, the time is obtained through the NTP server for synchronization; if the time cannot be obtained from the NTP server, the BIOS sends its own time to the BMC once when the system is turned on. It can be seen that when the prior art is used to synchronize the BMC time, if the NTP time cannot be obtained, the time synchronization can only be performed when the system is turned on, and the time accuracy of the BMC cannot be guaranteed.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a BMC time synchronization method, system, device and readable storage medium, which can effectively reduce the cost of BMC time synchronization and improve the accuracy of BMC time.

To achieve the above object, the present invention is implemented through the following technical solutions: a BMC time synchronization method, comprising:

Add time synchronization commands to the local BMC and define the data formats of its time requests and replies;

When the local BMC cannot obtain the NTP time from the NTP server, the local BMC periodically sends time requests to multiple BMCs;

The BMC that receives the time request sends reply data to the local BMC after passing the request verification;

After receiving the reply, the local BMC performs time synchronization verification. If the verification passes, the corresponding BMC is used as a candidate BMC for time synchronization;

According to each communication duration, the best BMC is selected from all time synchronization candidate BMCs;

Set the best BMC time to the BMC time of this machine.

Further, the time synchronization command adopts an IPMI command, the time request data includes a request verification code, and the request verification code adopts a preset encrypted string for time request verification;

The response data includes:

The local NTP status, NTP server address, timestamp and time synchronization check code; among them, when the local NTP status value is 1, it means that the time can be obtained from the NTP server, and the time synchronization check code uses the preset encrypted string for time synchronization verification.

Furthermore, the local BMC periodically sends time requests to multiple BMCs, including:

The local BMC periodically sends an IPMI time request Time Sync Request to M BMCs in the same network segment; where M>=2.

Further, the BMC receiving the time request sends reply data to the local BMC after passing the request verification, including:

If the BMC that receives the IPMI time request can recognize the request verification code, it sends an IPMI reply with the local NTP status, NTP server address, timestamp and N-bit time synchronization verification code.

Further, after receiving the reply, the local BMC performs a time synchronization check, and after the check passes, the corresponding BMC is used as a time synchronization candidate BMC, including:

After receiving the IPMI reply, the local BMC checks the time synchronization check code. If the check passes, the BMC is used as a candidate BMC for time synchronization.

Further, the method of selecting the best BMC from all time synchronization candidate BMCs according to each communication duration includes:

The communication duration of each time synchronization candidate BMC is determined, and the time synchronization candidate BMC with the shortest communication duration and a local NTP status value of 1 is selected as the best BMC.

Further, setting the optimal BMC time as the local BMC time includes:

The timestamp of the best BMC is set to the time of the local BMC, and the NTP server address of the local BMC is set to the NTP server address of the best BMC.

Correspondingly, the present invention also discloses a BMC time synchronization system, comprising:

The setting module is used to add time synchronization commands in the local BMC and define the data format of its time request and reply;

The request module is used to periodically send time requests to multiple BMCs when the local BMC cannot obtain the NTP time from the NTP server.

The reply module is used for the BMC that receives the time request to send reply data to the local BMC after passing the request verification;

The verification module is used to perform time synchronization verification after the local BMC receives the reply. If the verification passes, the corresponding BMC is used as a candidate BMC for time synchronization;

A screening module is used to screen out the best BMC from all time synchronization candidate BMCs according to each communication duration;

The synchronization module is used to set the time of the optimal BMC as the time of the local BMC.

Further, the request module is specifically used for: when the local BMC cannot obtain NTP time through the NTP server, the local BMC periodically sends an IPMI time request Time Sync Request to M BMCs in the same network segment; wherein M>=2.

Further, the reply module is specifically used for: if the BMC receiving the IPMI time request can identify the request verification code, then sending an IPMI reply with the local NTP status, NTP server address, timestamp and N-bit time synchronization verification code.

Furthermore, the verification module is specifically used for: after the local BMC receives the IPMI reply, checking the time synchronization verification code, if the verification passes, taking this BMC as a time synchronization candidate BMC.

Furthermore, the screening module is specifically used to: determine the communication duration of each time synchronization candidate BMC, and screen out the time synchronization candidate BMC with the shortest communication duration and a local NTP status value of 1, and use it as the best BMC.

Furthermore, the synchronization module is specifically used to: set the timestamp of the best BMC to the time of the local BMC, and set the NTP server address of the best BMC to the NTP server address of the local machine.

Accordingly, the present invention discloses a BMC time synchronization device, comprising:

A memory, used for storing a BMC time synchronization program;

The processor is used to implement the steps of the BMC time synchronization method as described in any one of the above when executing the BMC time synchronization program.

Accordingly, the present invention discloses a readable storage medium, on which a BMC time synchronization program is stored. When the BMC time synchronization program is executed by a processor, the steps of the BMC time synchronization method described in any one of the above items are implemented.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention provides a BMC time synchronization method, system, device and readable storage medium, which can automatically obtain the time of other BMCs through IPMI commands when the NTP server fails, and use the local NTP status value to ensure time accuracy and use the check code to ensure data security, which effectively reduces the cost of BMC time synchronization and ensures the accuracy of BMC time synchronization.

It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG1 is a flow chart of a method according to a specific embodiment of the present invention.

FIG2 is a system structure diagram of a specific implementation mode of the present invention.

In the figure, 1 is the setting module; 2 is the request module; 3 is the reply module; 4 is the verification module; 5 is the screening module; and 6 is the synchronization module.

Detailed ways

The core of the present invention is to provide a BMC time synchronization method. In the prior art, when the BMC is started, it needs to synchronize the time from the ME once. When the NTP server is turned on, the time is obtained through the NTP server for synchronization; if the time cannot be obtained from the NTP server, the BIOS sends its own time to the BMC once when the system is turned on. It can be seen that when the prior art is used to synchronize the BMC time, if the NTP time cannot be obtained, the time synchronization can only be performed when the system is turned on, and the time accuracy of the BMC cannot be guaranteed.

The BMC time synchronization method provided by the present invention, first, when the time cannot be obtained from the NTP server, the BMC periodically sends IPMI time requests to multiple BMCs in the same network segment, determines the best BMC according to the shortest response time and the NTP status, and sets the timestamp and NTP server address in the best BMC response as the time and NTP server address of the original BMC. It can be seen that the present invention can effectively reduce the cost of BMC time synchronization and improve the accuracy of BMC time.

In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Embodiment 1:

As shown in FIG1 , this embodiment provides a BMC time synchronization method, including the following steps:

S1: Add a time synchronization command in the local BMC and define the data format of its time request and reply.

Specifically, the time synchronization command uses an IPMI command. The time request data includes a request verification code, and the request verification code uses a preset encrypted string for time request verification. The reply data includes: the local NTP status, the NTP server address, the timestamp, and the time synchronization verification code; among them, when the local NTP status value is 1, it means that the time can be obtained from the NTP server, and the time synchronization verification code uses a preset encrypted string for time synchronization verification.

As an example, the BMC time request and time synchronization data types are as follows:

typedef struct Time Sync Request

{

uint8 RequestCode[16]; //Request verification code

}Time_Sync_Request;

typedef struct Time Sync Respond

{

uint8 NtpStatus; //ntp status: 1: time can be obtained from NTP

uint8 NtpServer; //When NtpStatus＝1, it is the NTP Server address; otherwise it is empty

uint8 TimeSyncStamp[24]; //time stamp

uint8 TimeSyncCode[16]; //time synchronization check code

}Time_Sync_Request;

S2: When the local BMC cannot obtain the NTP time from the NTP server, the local BMC periodically sends time requests to multiple BMCs.

Specifically, when the local BMC cannot obtain the NTP time through the NTP server, the local BMC periodically sends an IPMI time request Time Sync Request to M BMCs in the same network segment; where M>=2.

S3: The BMC that receives the time request sends reply data to the local BMC after passing the request verification.

Specifically, if the BMC receiving the IPMI time request can identify the request verification code, it sends an IPMI reply with the local NTP status, NTP server address, timestamp and N-bit time synchronization verification code.

S4: After receiving the reply, the local BMC performs time synchronization verification. If the verification passes, the corresponding BMC is used as a candidate BMC for time synchronization.

This step uses the time synchronization check code of the reply data to implement synchronization verification, that is, after the local BMC receives the IPMI reply, it verifies the time synchronization check code. If the verification passes, this BMC is used as a time synchronization candidate BMC.

S5: Filter out the best BMC from all time synchronization candidate BMCs according to each communication duration.

First, the communication duration of each time synchronization candidate BMC is determined. Then, the time synchronization candidate BMC with the shortest communication duration and a local NTP status value of 1 is selected and used as the best BMC.

S6: The optimal BMC time is set as the BMC time of the local device.

Specifically, the timestamp of the best BMC is set to the time of the local BMC, and the local NTP server address is set to the NTP server address of the best BMC.

This embodiment provides a BMC time synchronization method, which can automatically obtain the time of other BMCs through IPMI commands when the NTP server fails, and use the local NTP status value to ensure time accuracy and use the check code to ensure data security, which effectively reduces the cost of BMC time synchronization and ensures the accuracy of BMC time synchronization.

Embodiment 2:

Based on the first embodiment, as shown in FIG. 2 , the present invention further discloses a BMC time synchronization system, including: a setting module 1 , a request module 2 , a reply module 3 , a verification module 4 , a screening module 5 and a synchronization module 6 .

The setting module 1 is used to add a time synchronization command in the local BMC and define the data format of its time request and reply.

Request module 2 is used for: when the local BMC cannot obtain NTP time through the NTP server, the local BMC periodically sends time requests to multiple BMCs. Request module 2 is specifically used for: when the local BMC cannot obtain NTP time through the NTP server, the local BMC periodically sends IPMI time requests Time Sync Request to M BMCs in the same network segment; where M>=2.

The reply module 3 is used for the BMC that receives the time request to send reply data to the local BMC after the request is verified. The reply module 3 is specifically used for: if the BMC that receives the IPMI time request can recognize the request verification code, it will send an IPMI reply with the local NTP status, NTP server address, timestamp and N-bit time synchronization verification code.

Verification module 4 is used to perform time synchronization verification after the local BMC receives the reply, and if the verification passes, the corresponding BMC is used as a time synchronization candidate BMC. Verification module 4 is specifically used to: after the local BMC receives the IPMI reply, check the time synchronization verification code, and if the verification passes, use this BMC as a time synchronization candidate BMC.

The screening module 5 is used to screen out the best BMC from all time synchronization candidate BMCs according to each communication duration. The screening module 5 is specifically used to: determine the communication duration of each time synchronization candidate BMC, and screen out the time synchronization candidate BMC with the shortest communication duration and the local NTP status value of 1, and use it as the best BMC.

The synchronization module 6 is used to set the time of the best BMC as the time of the local BMC. The synchronization module 6 is specifically used to: set the timestamp of the best BMC as the time of the local BMC, and set the NTP server address of the best BMC as the NTP server address of the local BMC.

This embodiment provides a BMC time synchronization system, which can automatically obtain the time of other BMCs through IPMI commands when the NTP server fails, and use the local NTP status value to ensure time accuracy and use the check code to ensure data security, which effectively reduces the cost of BMC time synchronization and ensures the accuracy of BMC time synchronization.

Embodiment three:

This embodiment discloses a BMC time synchronization device, including a processor and a memory; wherein the processor implements the following steps when executing a BMC time synchronization program stored in the memory:

1. Add a time synchronization command to the local BMC and define the data format of its time request and reply.

2. When the local BMC cannot obtain NTP time from the NTP server, the local BMC periodically sends time requests to multiple BMCs.

3. The BMC that receives the time request sends reply data to the local BMC after passing the request verification.

4. After receiving the reply, the local BMC performs a time synchronization check. If the check passes, the corresponding BMC is used as a candidate BMC for time synchronization.

5. Filter out the best BMC from all time synchronization candidate BMCs based on each communication duration.

6. Set the optimal BMC time to the local BMC time.

Furthermore, the BMC time synchronization device in this embodiment may further include:

The input interface is used to obtain the BMC time synchronization program imported from the outside and save the obtained BMC time synchronization program to the memory, and can also be used to obtain various instructions and parameters transmitted by external terminal devices and transmit them to the processor so that the processor can use the above various instructions and parameters to carry out corresponding processing. In this embodiment, the input interface can specifically include but is not limited to a USB interface, a serial interface, a voice input interface, a fingerprint input interface, a hard disk reading interface, etc.

The output interface is used to output various data generated by the processor to the terminal device connected thereto, so that other terminal devices connected to the output interface can obtain various data generated by the processor. In this embodiment, the output interface may specifically include but is not limited to a USB interface, a serial interface, etc.

The communication unit is used to establish a remote communication connection between the BMC time synchronization device and the external server so that the BMC time synchronization device can mount the image file to the external server. In this embodiment, the communication unit may specifically include but is not limited to a remote communication unit based on wireless communication technology or wired communication technology.

The keyboard is used to obtain various parameter data or instructions input by the user by tapping the keycaps in real time.

The display is used to display the relevant information of the server power supply line short circuit locating process in real time.

The mouse can be used to assist users in inputting data and simplify user operations.

This embodiment provides a BMC time synchronization device, which can automatically obtain the time of other BMCs when the NTP server of the BMC fails, filter out the correct time and NTP server address, and set it as the local time and NTP server address, thereby ensuring the time accuracy of the BMC to the maximum extent.

Embodiment 4:

This embodiment also discloses a readable storage medium, and the readable storage medium mentioned here includes random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the technical field. The readable storage medium stores a BMC time synchronization program, and when the BMC time synchronization program is executed by the processor, the following steps are implemented:

1. Add a time synchronization command to the local BMC and define the data format of its time request and reply.

2. When the local BMC cannot obtain NTP time from the NTP server, the local BMC periodically sends time requests to multiple BMCs.

3. The BMC that receives the time request sends reply data to the local BMC after passing the request verification.

4. After receiving the reply, the local BMC performs a time synchronization check. If the check passes, the corresponding BMC is used as a candidate BMC for time synchronization.

5. Filter out the best BMC from all time synchronization candidate BMCs based on each communication duration.

6. Set the optimal BMC time to the local BMC time.

This embodiment provides a readable storage medium, which can automatically obtain the time of other BMCs when the NTP server of the BMC fails, filter out the correct time and NTP server address, and set them as the local time and NTP server address, thereby maximizing the time accuracy of the BMC.

In summary, the present invention realizes that when the NTP server fails, a BMC periodically sends IPMI time requests to M BMCs in the same network segment, determines the best BMC according to the shortest reply time and the NTP status, and sets the timestamp and NTP server address in its reply as the time and NTP server address of the original BMC, thereby completing the time synchronization of the BMC and effectively ensuring the accuracy of the BMC time synchronization.

In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. As for the method disclosed in the embodiment, since it corresponds to the system disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

In the several embodiments provided by the present invention, it should be understood that the disclosed systems, systems and methods can be implemented in other ways. For example, the system embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, or each module may exist physically separately, or two or more modules may be integrated into one unit.

Similarly, each processing unit in each embodiment of the present invention may be integrated into one functional module, or each processing unit may exist physically, or two or more processing units may be integrated into one functional module.

The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

The BMC time synchronization method, system, device and readable storage medium provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims (9)

1. A BMC time synchronization method, comprising: Add time synchronization commands in the local BMC and define the data format of its time request and reply; When the local BMC cannot obtain the NTP time from the NTP server, the local BMC periodically sends time requests to multiple BMCs; The BMC that receives the time request sends reply data to the local BMC after passing the request verification; After receiving the reply, the local BMC performs time synchronization verification. If the verification passes, the corresponding BMC is used as a candidate BMC for time synchronization; According to each communication duration, the best BMC is selected from all time synchronization candidate BMCs; specifically, the communication duration of each time synchronization candidate BMC is determined, and the time synchronization candidate BMC with the shortest communication duration and a local NTP status value of 1 is selected, and the time synchronization candidate BMC is selected as the best BMC; Set the best BMC time to the BMC time of this machine. 2. The BMC time synchronization method according to claim 1, wherein the time synchronization command adopts an IPMI command, the time request data includes a request verification code, and the request verification code adopts a preset encrypted string for time request verification; The response data includes: The local NTP status, NTP server address, timestamp and time synchronization check code; when the local NTP status value is 1, it means that the time can be obtained from the NTP server, and the time synchronization check code uses a preset encrypted string for time synchronization verification. 3. The BMC time synchronization method according to claim 2, wherein the local BMC periodically sends time requests to multiple BMCs, comprising: The local BMC periodically sends an IPMI time request Time Sync Request to M BMCs in the same network segment; where M>=2. 4. The BMC time synchronization method according to claim 3, characterized in that the BMC receiving the time request sends reply data to the local BMC after passing the request verification, comprising: If the BMC that receives the IPMI time request can recognize the request verification code, it sends an IPMI reply with the local NTP status, NTP server address, timestamp and N-bit time synchronization verification code. 5. The BMC time synchronization method according to claim 4, characterized in that after receiving the reply, the local BMC performs a time synchronization check, and after the check passes, the corresponding BMC is used as a time synchronization candidate BMC, including: After receiving the IPMI reply, the local BMC checks the time synchronization check code. If the check passes, the BMC is used as a candidate BMC for time synchronization. 6. The BMC time synchronization method according to claim 5, wherein the step of setting the time of the best BMC as the time of the local BMC comprises: Set the timestamp of the best BMC to the time of the local BMC, and set the NTP server address of the best BMC to the NTP server address of the local machine. 7. A BMC time synchronization system, comprising: The setting module is used to add time synchronization commands in the local BMC and define the data format of its time request and reply; The request module is used to periodically send time requests to multiple BMCs when the local BMC cannot obtain the NTP time from the NTP server. The reply module is used for the BMC that receives the time request to send the reply data to the local BMC after the request verification is passed; the verification module is used for the local BMC to perform time synchronization verification after receiving the reply, and the corresponding BMC is used as the candidate BMC for time synchronization after the verification is passed; The screening module is used to screen out the best BMC from all time synchronization candidate BMCs according to each communication duration; the synchronization module is used to set the time of the best BMC as the time of the local BMC. 8. A BMC time synchronization device, comprising: A memory, used for storing a BMC time synchronization program; A processor, configured to implement the steps of the BMC time synchronization method according to any one of claims 1 to 6 when executing the BMC time synchronization program. 9. A readable storage medium, characterized in that: a BMC time synchronization program is stored on the readable storage medium, and when the BMC time synchronization program is executed by a processor, the steps of the BMC time synchronization method according to any one of claims 1 to 6 are implemented.