CN115061776A - Processing method of virtual machine exception, electronic device and storage medium - Google Patents

Abstract

The invention relates to the technical field of cloud computing, and discloses a processing method of virtual machine exception, electronic equipment and a storage medium. In the invention, the processing method of the virtual machine exception comprises the following steps: the central processing unit reads a preset time threshold stored in the host machine and monitors the running time of the central processing unit in a non-root mode in real time; under the condition that the running time reaches a preset time threshold, the central processing unit generates a preset virtual machine exit process and triggers the virtual machine to pause running; the host machine collects the relevant information of the virtual machine and recovers the resources occupied by the virtual machine; the resources occupied by the virtual machine comprise resources of a central processing unit occupied by the virtual machine. The time required for processing the exception of the virtual machine can be shortened, and the reliability and the robustness of the host machine are improved.

Description

A virtual machine exception processing method, electronic device and storage medium

technical field

The present invention relates to the technical field of cloud computing, and in particular, to a method for processing abnormality of a virtual machine, an electronic device and a storage medium.

Background technique

In today's booming cloud computing market, cloud computing technology has also attracted more and more people's attention. Virtualization technology has significant advantages such as improving the utilization of network resources and effectively protecting the network environment, and has now become an indispensable support in the development of cloud computing technology.

When the virtual machine executes some microcode, the event window will be closed, and the central processing unit ("CPU") cannot respond to some events at this time. These events specifically include common interrupts, non-maskable interrupts (Non Maskable Interrupt, “NMI” for short), and system management interrupts (System management interrupts, “SMI” for short). When an exception occurs in the process of executing the microcode, the virtual machine will cause the CPU it runs to be unable to respond to all events for a long time, thereby causing the CPU to freeze. At this point, the CPU also cannot respond to notification messages sent to it by other CPUs, which will cause other CPUs to continuously send messages to it, resulting in the entire host being stuck.

When the virtual machine executes some microcodes and gets stuck, the traditional solution is to increase processing instructions for these microcodes, so that the virtual machine can avoid problems when executing the corresponding microcodes. However, there is a significant lag in this solution, and it may still be difficult to use the virtual machine properly during the problem-solving process.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a virtual machine exception processing method, electronic device and storage medium, so as to shorten the time required for processing virtual machine exceptions and improve the reliability and robustness of the host machine.

In order to achieve the above object, embodiments of the present invention provide a method for processing an exception of a virtual machine, including: a central processing unit reads a preset time threshold stored in a host machine, and runs the central processing unit in a non-root mode. When the running time reaches the preset time threshold, the central processing unit generates a preset virtual machine exit process, triggering the virtual machine to suspend operation; the host machine collects the relevant information of the virtual machine and reclaims the virtual machine occupied The resources occupied by the virtual machine include the resources of the central processing unit occupied by the virtual machine.

Embodiments of the present invention also provide a server, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor. The processor executes, so that at least one processor can execute the above-mentioned virtual machine exception processing method.

Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above-mentioned method for processing an exception of a virtual machine is implemented.

In the embodiment of the present invention, the central processing unit first reads the preset time threshold stored in the host machine, and monitors the running time of the central processing unit in the non-root mode in real time, that is, the running time of the virtual machine is monitored in real time. real time monitoring. Furthermore, when the running time reaches the preset time threshold, it means that the virtual machine runs for too long and fails to exit normally, and may be stuck, and the central processing unit generates a preset virtual machine exit process to trigger the virtual machine to suspend running. Compared with the traditional method of diagnosing and dealing with exceptions after the abnormality of the virtual machine, the abnormal operation of the virtual machine can be detected in a more timely manner, and the time required for processing the abnormality of the virtual machine can be shortened. Then the host machine collects relevant information of the virtual machine and reclaims the resources occupied by the virtual machine, so that the resources of the central processing unit occupied by the virtual machine can recover the response to the communication messages of other central processing units on the host machine where the central processing unit is located. , to avoid serious problems such as the host machine being stuck due to other central processing units continuously sending communication requests to the abnormal central processing unit, effectively improving the reliability and robustness of the host computer.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute limitations of the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

FIG. 1 is a schematic flowchart of a method for processing an exception of a virtual machine according to an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a virtual machine running according to another embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, each embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can appreciate that, in the various embodiments of the present invention, many technical details are set forth in order for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized.

For the execution of some microcodes to cause the virtual machine to freeze, the traditional solution is to add corresponding processing instructions to these microcodes after the vulnerability is discovered. When the virtual machine executes these microcodes, the operation and maintenance personnel can complete the processing action of adding settings, so that the virtual machine can avoid being stuck. It can be seen that this method of solving the virtual machine stuck problem has obvious lag, and the whole process of solving the problem may take a long time, which still affects the normal use of the virtual machine.

An embodiment of the present invention relates to a method for processing an exception of a virtual machine. In this embodiment, the central processing unit reads the preset time threshold stored in the host, and monitors the running time of the central processing unit in the non-root mode in real time; when the running time reaches the preset time threshold Next, the central processing unit generates a preset virtual machine exit process, triggering the virtual machine to suspend operation; the host machine collects relevant information of the virtual machine, and recycles the resources occupied by the virtual machine; wherein, the resources occupied by the virtual machine include the central processing occupied by the virtual machine. device resources.

The implementation details of the virtual machine exception processing method in this embodiment will be specifically described below. The following content is only for the convenience of understanding the implementation details of this solution, and is not necessary for implementing this solution. The specific process is shown in Figure 1, which may include the following steps:

In step 101, the central processing unit reads the preset time threshold stored in the host, and monitors the running time of the central processing unit in the non-root mode in real time.

Generally speaking, the CPU runs in non-root mode when the virtual machine is running, and exits the non-root mode when the virtual machine stops running. Therefore, the central processing unit performs real-time monitoring of the time when it runs in the non-root mode, that is, the real-time monitoring of the running time of the virtual machine. The running time of the virtual machine is monitored in real time, so that the running of the virtual machine can be intervened in time when the running time of the virtual machine is too long.

Understandably, the central processing unit reads the preset time threshold stored in the host machine, which may be specifically: when the central processing unit switches to the non-root mode, reads the preset time threshold stored in the host machine corresponding to the currently running virtual machine. Set a time limit. In the case that there are multiple virtual machines on the host machine, the central processing unit can restrict the running time of the virtual machine by using a preset time threshold corresponding to the currently running virtual machine.

It is also worth mentioning that, for different virtual machines running on the host machine, different preset time thresholds can be set in advance, so that it is possible to independently judge the abnormal operation of the virtual machines by using different time thresholds.

In an example, before the central processor reads the preset time threshold stored in the host, it may further include: the host receives the preset time threshold set by the user through the user-mode program based on the time configuration interface in the user-mode program . Understandably, in this example, the user can independently set the preset time threshold of the virtual machine through the user mode program of the host machine, so that the set preset time threshold can specifically meet the actual running requirements of the virtual machine.

The host computer receiving the preset time threshold based on the time configuration interface may specifically include: first checking the preset time threshold set by the user, and judging whether the preset time threshold is greater than 0; if the preset time threshold is greater than 0, the preset time threshold Set a time threshold for storage.

It is worth mentioning that, in order to better implement the method provided by the present invention, to ensure that the central processing unit cannot normally exit the non-root mode when the virtual machine runs abnormally, before the central processing unit reads the preset time threshold stored in the host machine. , and may also include: detecting whether the central processing unit has a mechanism to periodically exit non-root mode. When the central processing unit has a mechanism for periodically exiting the non-root mode, the host computer stores the preset time threshold for the central processing unit to read.

In a specific embodiment where the virtual machine is a KVM virtual machine, after receiving the preset time threshold, the KVM virtual machine kernel module detects whether the current CPU supports regular exit from the non-root mode, and if not, reports an error directly; Write the value of the preset time threshold into the virtual machine control structure (VirtualMachine Control Structure, referred to as "VMCS") corresponding to the KVM virtual machine in the host machine (specifically, it can be written into the NOTIFY_WINDOW field of VMCS), and then activate the CPU periodically Exit function.

Since the preset time thresholds of the virtual machines are stored in their corresponding VMCSs, the abnormal judgments between the virtual machines can be independent of each other. If any virtual machine among multiple virtual machines is stuck, it will not affect the normal operation of other virtual machines.

In addition, in order to prevent the virtual machine from being erroneously reclaimed in a normal running state due to the setting of the preset time threshold being too small, a minimum value of the preset time threshold may also be preset. After receiving the preset time threshold set by the user through the user state program, the method may further include: in the case that the received preset time threshold set by the user is less than the preset minimum time threshold value, the host sends a reset reminder to the user, Or update the preset time threshold to the minimum value of the time threshold.

Step 102, when the running time reaches a preset time threshold, the central processing unit generates a preset virtual machine exit process, and triggers the virtual machine to suspend running.

Generally speaking, when the CPU runs in non-root mode for a certain period of time, it will automatically exit non-root mode. Therefore, when the running time of the central processing unit in the non-root mode reaches the preset time threshold, it means that the virtual machine has been running for too long and cannot exit normally, and the virtual machine may be stuck. Therefore, in this step, the central processing unit generates a preset virtual machine exit process, which can trigger the virtual machine to stop running in time, and perform subsequent steps.

It is worth mentioning that, after the preset virtual machine exit process is generated, it may further include: the central processing unit generates virtual machine abnormal alarm information on the host machine. Generating alarm information on the host can remind the operation and maintenance personnel of the host to protect the host in time to ensure the safe operation of the host when the virtual machine is stuck.

In addition, in order to shorten the stop running time of the virtual machine, after reclaiming the resources occupied by the virtual machine, the method may further include: the central processing unit triggers the restart of the virtual machine. It is worth mentioning that the triggering of the virtual machine restart involved here can automatically restart the virtual machine according to the original configuration according to the user's needs.

Step 103, the host machine collects relevant information of the virtual machine, and reclaims the resources occupied by the virtual machine; wherein the resources occupied by the virtual machine include the resources of the central processing unit occupied by the virtual machine.

Since the preset virtual machine exit process is different from the conventional virtual machine exit process, when the central processing unit generates the preset virtual machine exit process, the kernel module controlling the virtual machine in the host machine captures this event. In order to enable the resources occupied by the virtual machine to be released and reused, the host machine reclaims the resources occupied by the virtual machine. The resources occupied by the virtual machine involved here may include, in addition to the resources occupied by the central processing unit, the memory, disk, and resources of other transparent transmission devices occupied by the virtual machine.

It is worth noting that the relevant information of the virtual machine involved in this step may include: the software version of the virtual machine, the virtual machine control structure VMCS, and virtual central processing unit (“VCPU” for short) information. It is worth mentioning that this embodiment does not specifically limit the relevant information of the virtual machine to be collected by the host machine, and the relevant information of the virtual machine may include other information to be collected related to the virtual machine and running the virtual machine.

In addition, after the relevant information of the virtual machine is collected, the information files can be packaged and stored in a fixed location of the host machine, so as to be easily viewed by technicians.

In this embodiment, the central processing unit first reads the preset time threshold stored in the host machine, and monitors the running time of the central processing unit in the non-root mode in real time, that is, the running time of the virtual machine is monitored in real time . Furthermore, when the running time reaches the preset time threshold, it means that the virtual machine runs for too long and fails to exit normally, and may be stuck, and the central processing unit generates a preset virtual machine exit process to trigger the virtual machine to suspend running. Compared with the traditional method of diagnosing and dealing with exceptions after the abnormality of the virtual machine, the abnormal operation of the virtual machine can be detected in a more timely manner, and the time required for processing the abnormality of the virtual machine can be shortened. Then the host machine collects relevant information of the virtual machine and reclaims the resources occupied by the virtual machine, so that the resources of the central processing unit occupied by the virtual machine can recover the response to the communication messages of other central processing units on the host machine where the central processing unit is located. , to avoid serious problems such as the host machine being stuck due to other central processing units continuously sending communication requests to the abnormal central processing unit, effectively improving the reliability and robustness of the host computer.

Another embodiment of the present invention relates to a method for processing an exception of a virtual machine. It is worth noting that the main difference between this embodiment and the previous embodiment is that: in this embodiment, when the virtual machine is suspended, it also includes using a judgment program to judge whether the virtual machine exit process is the preset virtual machine exit. process.

In addition, it is worth noting that the technical details disclosed in the previous embodiment are still valid in this embodiment, and are not repeated in this embodiment to reduce repetition.

The implementation details of the virtual machine exception processing method in this embodiment will be specifically described below. The following content is only for the convenience of understanding the implementation details of this solution, and is not necessary for implementing this solution. The flowchart of the virtual machine operation involved in this embodiment may be as shown in FIG. 2 .

Step 201, the virtual machine starts to run. It can be understood that the virtual machine involved in this embodiment is pre-configured with a corresponding preset time threshold, which is used to limit the running time of the virtual machine.

Step 202, the timer starts timing, and the running time of the virtual machine is monitored in real time through the timing time of the timer.

It should be noted that, in this embodiment, a timer is used to monitor the running time of the virtual machine in real time. The monitoring of the running time of the virtual machine can be realized by monitoring the running time of the central processing unit in non-root mode in real time. Therefore, the technical means involved in this step can be specifically as follows: when the central processing unit switches to the non-root mode, the timer is triggered to start timing, and the time when the central processing unit is running in the non-root mode is performed in real time through the timing time of the timer. monitor.

Step 203, the virtual machine is suspended.

Step 204: Determine whether the virtual machine exit process is a preset virtual machine exit process.

In many cases, a virtual machine exit process will occur, causing the virtual machine to suspend operation. When performing normal steps such as accessing privileged instructions or virtual hardware, a virtual machine exit process may also occur, causing the virtual machine to suspend operation. Therefore, in order to ensure that the steps of handling exceptions are only performed when the preset virtual machine exit process occurs, and to avoid the steps of recycling the resources of the virtual machine when the virtual machine exits normally, which would lead to waste of processing resources and affect the subsequent normal operation of the virtual machine, in After the virtual machine is suspended, it is necessary to determine whether the current exit process is the preset virtual machine exit process.

In step 205, the host machine collects relevant information of the virtual machine, and reclaims the resources occupied by the virtual machine.

When the virtual machine exit process is the preset virtual machine exit process, the host machine collects relevant information of the virtual machine and reclaims the resources occupied by the virtual machine, so that the resources occupied by the virtual machine can be released. It enables the CPU resources occupied by the virtual machine to recover the response to the communication messages of other CPUs on the host where the CPU is located, so as to avoid other CPUs sending communication requests to the abnormal CPU continuously. This leads to serious problems such as the host machine being stuck, effectively improving the reliability and robustness of the host machine.

Step 206, clearing the timing time.

If the virtual machine exit process is a non-preset virtual machine exit process, it means that no exception occurs in the virtual machine during this period of time, and no exception handling is required. Instead, the timer is restored, that is, the timer is reset to zero. This enables the timer to restart timing after the processor enters the non-root mode next time, so as to avoid a timing error and erroneous triggering of the preset virtual machine exit process, which affects the normal operation of the virtual machine.

It can be seen that the implementation of the method provided by the present invention will not affect the step flow under the normal operation of the virtual machine. Therefore, the tools and management software related to running the virtual machine do not need any modification, which can ensure that the electronic device implementing the method has better compatibility. In addition, since the preset virtual machine exit process is generated by the central processing unit, it will not interfere with the running performance of the virtual machine.

In addition, the coupling degree between the steps in the above method is low, and the steps after the CPU generates the preset virtual machine exit process can also be flexibly customized according to the actual needs of different scenarios.

It is worth noting that, in addition to the virtual machine stuck caused by the abnormal microcode mentioned in the foregoing content, for the stuck caused by other virtual machines occupying the CPU resources for a long time, the processing of the virtual machine exception provided by the present invention is method also works. The method for processing the abnormality of the virtual machine provided by the present invention does not need to modify the virtual machine system, and can enhance the usability and robustness of the cloud platform without the user's perception.

The steps of the above methods are divided only for the purpose of describing clearly, and can be combined into one step or split into some steps during implementation, and decomposed into multiple steps, as long as they contain the same logical relationship, they are all within the protection scope of this patent; Adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are within the scope of protection of this patent.

Another embodiment of the present invention relates to a server, as shown in FIG. 3 , comprising at least one processor 301; and a memory 302 connected in communication with the at least one processor 301; wherein, the memory 302 stores data that can be processed by the at least one processor 302. The instructions are executed by the processor 301, and the instructions are executed by the at least one processor 301, so that the at least one processor 301 can execute the above-mentioned method for processing virtual machine exceptions.

The memory 302 and the processor 301 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 301 and various circuits of the memory 302 together. The bus may also connect together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface between the bus and the transceiver. A transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other devices over a transmission medium. The data processed by the processor 301 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor 301 .

Processor 301 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions. The memory 302 may be used to store data used by the processor 301 when performing operations.

Another embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When a computer program is executed by a processor, an embodiment of the above-mentioned method for processing an exception of a virtual machine is implemented.

Those skilled in the art can understand that all or part of the steps in the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program is stored in a storage medium and includes several instructions to make a device (which may be A single-chip microcomputer, a chip, etc.) or a processor (processor) executes all or part of the steps of the methods in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, removable hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes.

The above-mentioned embodiments are provided for those of ordinary skill in the art to implement and use the present invention. Those of ordinary skill in the art can make various modifications or changes to the above-mentioned embodiments without departing from the inventive concept of the present invention. The protection scope of the invention is not limited by the above-mentioned embodiments, but should meet the maximum scope of the innovative features mentioned in the claims.

Claims (10)

1. A method for processing an abnormality of a virtual machine, comprising: The central processing unit reads the preset time threshold stored in the host, and monitors the time when the central processing unit runs in the non-root mode in real time; When the running time reaches the preset time threshold, the central processing unit generates a preset virtual machine exit process, and triggers the virtual machine to suspend running; The host machine collects relevant information of the virtual machine, and reclaims the resources occupied by the virtual machine, wherein the resources occupied by the virtual machine include the resources of the central processing unit occupied by the virtual machine. 2. The method for processing an abnormality of a virtual machine according to claim 1, wherein before the central processing unit reads the preset time threshold stored in the host machine, the method further comprises: The host computer receives the preset time threshold set by the user through the user-mode program based on the time configuration interface in the user-mode program. 3 . The method for processing an exception of a virtual machine according to claim 2 , wherein after receiving the preset time threshold set by the user through the user state program, the method further comprises: 3 . In the case that the received preset time threshold set by the user is smaller than the preset minimum time threshold value, the host computer sends a reset reminder to the user, or updates the preset time threshold to the time Threshold minimum value. 4. The method for processing an abnormality in a virtual machine according to claim 1, wherein the real-time monitoring of the running time of the central processing unit in a non-root mode comprises: When the central processing unit is switched to the non-root mode, a timer is triggered to start timing, and the time when the central processing unit is running in the non-root mode is monitored in real time through the timing time of the timer; The processing method for the virtual machine exception further includes: In the case that the virtual machine is suspended, determine whether the virtual machine exit process is the preset virtual machine exit process; When the virtual machine exit process is the preset virtual machine exit process, the host machine collects relevant information of the virtual machine, and reclaims the resources occupied by the virtual machine; Alternatively, when the virtual machine exit process is a non-preset virtual machine exit process, the central processing unit clears the timing time to zero. 5. The method for processing an abnormality in a virtual machine according to claim 4, wherein the central processing unit reads the preset time threshold stored in the host machine, comprising: When switching to the non-root mode, the central processing unit reads the preset time threshold corresponding to the currently running virtual machine stored in the host machine. 6. The method for processing an exception of a virtual machine according to any one of claims 1 to 5, wherein after the generating a preset virtual machine exit process, the method further comprises: The central processing unit generates virtual machine abnormality alarm information on the host machine; After the reclaiming the resources occupied by the virtual machine, the method further includes: The central processing unit triggers the restart of the virtual machine. 7. The method for processing an abnormality in a virtual machine according to any one of claims 1 to 5, wherein before the central processing unit reads the preset time threshold stored in the host machine, the method further comprises: detecting whether the central processing unit has a mechanism for periodically exiting the non-root mode; When the central processing unit has the mechanism for periodically exiting the non-root mode, the host computer stores the preset time threshold for the central processing unit to read. 8. The method for processing an exception of a virtual machine according to any one of claims 1 to 5, wherein the relevant information of the virtual machine comprises: a software version of the virtual machine, a virtual machine control structure VMCS, and a virtual machine Processor information. 9. An electronic device, characterized in that, comprising: at least one processor; and, a memory communicatively coupled to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the execution of any of claims 1 to 8 The processing method of the virtual machine exception described above. 10 . A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the method for processing an exception of a virtual machine according to any one of claims 1 to 8 is implemented. 11 .

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