WO2019144777A1

WO2019144777A1 - Packet forwarding method and apparatus, server, and storage medium

Info

Publication number: WO2019144777A1
Application number: PCT/CN2018/125951
Authority: WO
Inventors: 李光伟; 董玢
Original assignee: 北京金山云网络技术有限公司; 北京金山云科技有限公司; 北京金迅瑞博网络技术有限公司
Priority date: 2018-01-24
Filing date: 2018-12-30
Publication date: 2019-08-01
Also published as: CN110071880B; CN110071880A

Abstract

The embodiments of the present application provide a packet forwarding method and apparatus based on a virtual switch, a server, and a storage medium. The method comprises: initializing a virtual switch in a first process to obtain initialization result data, and caching the initialization result data in a memory; forwarding a received packet by means of the initialized virtual switch by using the initialization result data in a second process; recreating the second process and obtaining the initialization result data from the memory when an exception occurs in the second process; and forwarding the received packet by means of the initialized virtual switch by using the obtained initialization result data in the recreated second process. Therefore, time consumption due to the reinitialization of the virtual switch is avoided, so that the virtual switch can resume a packet forwarding service as soon as possible, and the packet forwarding efficiency is improved.

Description

Message forwarding method, forwarding device, server and storage medium

This application claims priority to Chinese Patent Application No. 201810069233.5, entitled "Message Forwarding Method, Forwarding Device, Server and Storage Media", filed on January 24, 2018, the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of virtual switch technologies, and in particular, to a packet forwarding method, a forwarding device, a server, and a storage medium based on a virtual switch.

Background technique

A virtual switch is a switch that emulates the functionality of a physical switch through software. A virtual switch is used to connect virtual network interfaces between different virtual machines to implement data exchange between virtual machines. Existing virtual switches are usually developed based on the DPDK (Data Plane Development Kit). The DPDK provides libraries and drivers for fast packet processing during the development of virtual switches.

When an existing computer runs a virtual switch based on the DPDK development, the virtual machine is usually initialized in a process, and then the packet is forwarded in the process. The specific process is as follows: after the computer starts the operating system, the process of running the virtual switch is established in the operating system, firstly, the large page memory initialization and the virtual switch network card driver initialization are performed in the process, and the large page memory data and the network card driver data are obtained, and then In the process, the initialized virtual switch uses the large page memory data and the network card drive data to forward the received message.

Sometimes, due to an abnormality in the forwarding of the packet, the process is abnormal (for example, the process stops responding), and the process needs to be restarted. When restarting the above process, the operating system needs to re-execute the large page memory initialization and the network card driver initialization. After the initialization is completed, the message can be forwarded again, and the large page memory initialization and the network card driver initialization take longer to wait, resulting in a long waiting time. Packet forwarding efficiency is low.

Summary of the invention

The purpose of the embodiment of the present application is to provide a packet forwarding method, a forwarding device, a server, and a storage medium based on a virtual switch, so as to improve packet forwarding efficiency of the virtual switch. The specific technical solutions are as follows:

In a first aspect, the embodiment of the present application provides a packet forwarding method based on a virtual switch, including:

Initializing the virtual switch in the first process, obtaining initialization result data, and buffering the initialization result data into the memory;

In the second process, the received message is forwarded by the initialized virtual switch by using the initialization result data;

When an abnormality occurs in the second process, re-creating the second process, and acquiring the initialization result data from the memory;

In the second process of re-creation, the received message is forwarded by the initialized virtual switch using the obtained initialization result data.

In a second aspect, the embodiment of the present application provides a packet forwarding device based on a virtual switch, including:

An initialization module, configured to perform initialization of the virtual switch in the first process, obtain initialization result data, and cache the initialization result data into the memory;

a forwarding module, configured to forward, by using the initialization result data, the received packet by the initialized virtual switch in the second process;

The creating module is further configured to: when the second process is abnormal, re-create the second process, and obtain the initialization result data from the memory;

The forwarding module is further configured to forward the received packet by using the obtained initialization result data by the initialized virtual switch in the second process of re-creation.

In a third aspect, an embodiment of the present application provides a server, including a processor and a machine readable storage medium, where the machine readable storage medium stores machine executable instructions executable by the processor, the processor When the machine executable instructions are executed, the virtual switch-based message forwarding method steps provided above are implemented.

In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores a computer program, where the computer program is executed by a processor to implement the virtual switch-based message provided above. Forward method steps.

In a fifth aspect, the embodiment of the present application further provides a computer program product comprising instructions, when executed on a computer, causing a computer to execute the virtual switch-based message forwarding method provided above.

In a sixth aspect, the embodiment of the present application further provides a computer program, when running on a computer, causing the computer to execute the virtual switch-based message forwarding method provided above.

It can be seen from the foregoing technical solution that the virtual switch-based packet forwarding method, the forwarding device, the server, and the storage medium provided by the embodiment of the present application are configured to initialize the virtual switch and cache the initialization result data in the first process. In the memory, the virtual switch can forward the received packet in the second process by using the initialization result data. Even if the second process is abnormal, after the second process is re-created, the virtual switch can directly use the obtained initialization result data to continue reporting. Forwarding of the text. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency. Of course, implementing any of the products or methods of the present application does not necessarily require that all of the advantages described above be achieved at the same time.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application and the technical solutions of the prior art, the following description of the embodiments and the drawings used in the prior art will be briefly introduced. Obviously, the drawings in the following description are only Some embodiments of the application may also be used to obtain other figures from those of ordinary skill in the art without departing from the scope of the invention.

FIG. 1 is a schematic flowchart of a method for forwarding a packet based on a virtual switch according to an embodiment of the present disclosure;

2 is a schematic flowchart of information transmission between a first process and a second process in a packet forwarding method based on a virtual switch according to an embodiment of the present disclosure;

FIG. 3 is another schematic flowchart of a method for forwarding a packet based on a virtual switch according to an embodiment of the present disclosure;

4 is a schematic flowchart of detecting whether a second process is in a normal state in a packet forwarding method based on a virtual switch according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a packet forwarding device based on a virtual switch according to an embodiment of the present disclosure;

FIG. 6 is another schematic structural diagram of a virtual switch-based packet forwarding apparatus according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a detection module in a packet forwarding device based on a virtual switch according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a server according to an embodiment of the present application.

Detailed ways

In order to make the objects, technical solutions, and advantages of the present application more comprehensible, the present application will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Existing virtual switches are usually developed based on the DPDK (Data Plane Development Kit). Developed by 6WIND, Intel and other companies, DPDK is mainly based on Linux system. It is used for fast packet processing function library and driver set, which can greatly improve data processing performance and throughput, and improve the efficiency of data plane application.

The advantages include: reducing cache failure through large pages, using kernel bypass technology to map the network card directly to the user state, so that the packet path does not need to be processed by a complex protocol stack.

At the same time, the DPDK also has corresponding limitations to control the performance of the virtual switch. For example, when the virtual switch based on the DPDK framework starts up, it needs to perform large-page memory mapping, a large number of configuration loads, and initialization of the network card driver. .

Moreover, when an existing server runs a virtual switch developed based on the DPDK, the virtual machine is usually initialized in one process, and then the packet is forwarded in the process. If the forwarding packet is abnormal, causing the above process to be abnormal (for example, the process stops responding), you need to restart the above process. When the above process is restarted, the operating system needs to re-execute the process of initializing large page memory, loading a large number of configurations, and initializing the network card driver. After the initialization is complete, the device can continue to forward packets. The re-performation of large page memory initialization and NIC driver initialization takes a long wait time, resulting in low packet forwarding efficiency.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Method embodiment 1

As shown in FIG. 1 , the embodiment of the present application provides a packet forwarding method based on a virtual switch, which can be applied to a server, and can be applied to other types of devices with data processing operations. The process may include the following steps. :

S101: Initialize the virtual switch in the first process, obtain initialization result data, and cache the initialization result data into the memory.

In the embodiment of the present application, the initialization of the virtual switch may be performed in the first process by using the created first process. It is easy to understand that during the initialization process, the virtual switch needs to perform large page memory initialization, network card driver initialization, etc., which takes a lot of time. Based on the above considerations, it may be possible to separate the initialization process of the virtual switch in one process.

Since the memory has a very high data read/write speed, this initialization feature can be used to cache the initialization result data obtained after initialization into the memory. When the server needs to call these initialization result data, it can quickly read the cached data from memory.

Further, the initialization of the virtual switch may include operations related to initialization of the virtual switch, such as large page memory initialization, network card driver initialization, and network card queue initialization, so that data such as large page memory data, network card driver data, and network card queue information may be obtained.

As an optional implementation manner of the embodiment of the present application, in order to complete the initialization of the virtual switch as soon as possible, the first process may be created in the process of starting the server operating system, and the virtual switch is initialized in the first process. After the virtual switch is initialized and the initialization result data is cached in the memory, the server can enter the waiting state and wait for the calling command to call the cached initialization result data.

By creating the first process in the process of starting the server operating system and initializing the virtual switch in the first process, the initialization of the virtual switch can be performed at the startup of the server, instead of waiting for the server to enter the operating interface of the operating system. The initialization of the virtual switch is performed, so that the initialization of the virtual switch is advanced, which is beneficial to improving the startup speed of the virtual switch.

S102. In the second process, the received message is forwarded by using the initialization result data by the initialized virtual switch.

In the embodiment of the present application, the second process may be created in the operating system, where the second process is a process different from the first process, and they are respectively run in the operating system of the server. In the second process, the initialized virtual switch can forward the received message by using the cached initialization result data.

Specifically, the created second process may share the memory with the first process, thereby acquiring initialization result data buffered in the memory, such as large page memory data, network card driver data, and network card queue information. After the initialized virtual switch obtains the above data, it can receive the packet and forward the packet in the second process.

In the embodiment of the present application, only the initialization of the virtual switch may be performed in the first process, so that the function of the first process is simple and the purpose of stable operation is achieved. In the second process, only the receiving and forwarding of the packet can be performed, and even if the second process is abnormal, the first process is not affected.

S103. When an exception occurs in the second process, re-creating the second process and obtaining initialization result data from the memory.

In the second process, the second process is abnormal because the virtual switch forwards the packet. For example, the second process stops responding. In this case, you need to re-create the second process by creating a module, so that the virtual switch can re-transmit the packet.

In the process of re-creating the second process, the first process has already initialized the virtual switch and caches the initialization result data into the memory, so the second process does not need to perform the above initialization operation, but The cached initialization result data, such as large page memory data, network card driver data, and network card queue information, can be obtained directly from the memory. It is not difficult to see that, as the above-mentioned initialization operation is not required to be performed in the second process, the present application can eliminate the time taken for re-initializing the virtual switch, and the virtual switch can resume the packet forwarding service as soon as possible. .

S104. In the second process of re-creation, the received packet is forwarded by using the obtained initialization result data by the initialized virtual switch.

In the embodiment of the present application, as described above, the second process may be re-created, and the initialization result data may be obtained from the memory, and the server may utilize the obtained initialization result data. Therefore, in the second process of re-creation, the initialized virtual switch can forward the received packet by using the obtained initialization result data.

Specifically, for example, after the second process re-created by the server, data such as large page memory data, network card driver data, and network card queue information cached in the memory may be acquired. The initialized virtual switch can directly use the above data to receive packets and forward packets in the second process.

As an optional implementation manner of the embodiment of the present application, before the initialization of the virtual switch is performed in the first process, the first process may be created.

Multiple virtual machines can usually be deployed in a server, and data exchange can be performed between these virtual machines through a virtual switch. Specifically, the virtual switch service can be run in the process of the server, and the virtual network interface (the port of the virtual network card) of each virtual machine is connected through the virtual switch, and the virtual switch is used for packet forwarding.

As described above, when an existing virtual switch is running, the virtual machine is first initialized in a process, and then the packet is forwarded in the process. In the embodiment of the present application, a process may be created first, which is referred to as a first process. Specifically, a first process may be created in a Linux operating system. The process of creating a process in the Linux operating system can be obtained by an existing process creation method, and details are not described herein again.

As an optional implementation manner of the embodiment of the present application, multiple virtual switches can be started in one server for packet forwarding. Specifically, the server may create a first process, perform initialization of the virtual switch in the first process, obtain initialization result data, and cache the initialization result data into the memory; may create multiple second processes, multiple second Each of the processes corresponds to a virtual switch, and in each of the second processes, the corresponding virtual switch can forward the received packet through the initialization result data obtained by the first process.

When an abnormality occurs in a second process, the second process may be re-created, and the initialization result data is obtained from the memory, so that the corresponding virtual switch uses the obtained initialization result data in the second process that is re-created. Forward the received message. In the embodiment of the present application, a plurality of virtual switches are started in a server to perform packet forwarding, and packet forwarding is performed compared to a virtual switch, thereby improving packet forwarding efficiency. The second process corresponds to a virtual switch. When one of the second processes is abnormal, the second process is re-created and the initialization result data is obtained from the memory, so that the packet forwarding can be continued through the corresponding virtual switch. The virtual switch does not need to be re-initialized, so that the virtual switch can resume the packet forwarding service as soon as possible, saving the time lost due to virtual switch initialization.

2 is a schematic diagram of information transmission between a first process and a second process, as shown in FIG. 2, the process includes:

S201. The server creates a first process.

S202, performing initialization of the virtual switch in the first process, which may include large page memory initialization and network card driver initialization;

S203. Cache the initialization result data into the memory.

S204, the first process is resident in the memory, and enters a sleep waiting state;

S205. The server creates a second process.

S206, obtaining initialization result data from the memory, including large page memory initialization and network card driver initialization;

S207. The virtual switch forwards the received packet by using the obtained initialization result data.

It should be noted that, in the embodiment of the present application, since the packet forwarding service in the second process needs to use the initialization result data generated by the first process, the first process may be regarded as the main process, and the second process may be viewed. The work is from the process. However, the first process and the second process are relatively independent, and even if the second process stops responding, it will not affect the first process.

A virtual switch-based packet forwarding method is provided by the embodiment of the present application. The virtual switch can use the initialization result data in the second process by performing initialization of the virtual switch in the first process and buffering the initialization result data into the memory. After forwarding the received packet, even if the second process is abnormal, the virtual switch can directly forward the packet using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

Method embodiment 2

As shown in FIG. 3, the embodiment of the present application further provides a packet forwarding method based on a virtual switch, which can be applied to a server, and can be applied to other types of devices with data processing operations, including the following steps:

S301. Create a first process.

Multiple virtual machines can usually be deployed in one server, and data exchange can be performed between these virtual machines through virtual switches. Specifically, the virtual switch service can be run in the process of the server, and the virtual network interface of each virtual machine is connected through the virtual switch, and the virtual switch is used for packet forwarding.

When an existing virtual switch is running, it is usually initialized in a process in a virtual machine, and then the packet is forwarded in the process. In the embodiment of the present application, a process may be created first, which is referred to as a first process. Specifically, a first process may be created in a Linux operating system. The process of creating a process in the Linux operating system can be obtained by an existing process creation method, and details are not described herein again.

S302: Initialize the virtual switch in the first process, obtain initialization result data, and cache the initialization result data into the memory.

In the embodiment of the present application, the initialization of the virtual switch may be performed in the first process by using the created first process. It is easy to understand that during the initialization process, the virtual switch needs to perform large page memory initialization, network card driver initialization, etc., which takes a lot of time, and the virtual switch's initialization process can be separately placed in one process.

As an optional implementation manner of the embodiment of the present application, in order to complete the initialization of the virtual switch as soon as possible, the first process may be created in the process of starting the server operating system, and the virtual switch is initialized in the first process. After the virtual switch is initialized and the initialization result data is cached in the memory, the server can enter the wait state and wait for the call command to call the cached initialization result data at any time. By creating the first process in the process of starting the server operating system and initializing the virtual switch in the first process, the initialization of the virtual switch can be performed at the startup of the server, instead of waiting for the server to enter the operating interface of the operating system. The initialization of the virtual switch is performed, so that the initialization of the virtual switch is advanced, which is beneficial to improving the startup speed of the virtual switch.

S303. In the second process that has been created, the received packet is forwarded by using the initialization result data by the initialized virtual switch.

Specifically, the created second process may share the memory with the first process, so that the initialization result data buffered in the memory, such as large page memory data, network card driver data, and network card queue information, may be acquired. After the initialized virtual switch obtains the above data, it can receive the packet and forward the packet in the second process.

In the embodiment of the present application, only the initialization of the virtual switch may be performed in the first process, so that the function of the first process is simple and the purpose of stable operation is achieved. In the second process, only the receiving and forwarding of the packet can be performed, and even if the second process is abnormal, the first process is not affected. Moreover, after the virtual switch is initialized, the process of starting and forwarding the message in the second process can reach the millisecond level time, and has the characteristics of fast startup speed.

S304. Detect whether the second process is in a normal state.

In the embodiment of the present application, the initialized virtual switch uses the initialization result data, and in the process of forwarding the received packet in the second process, the second process may be abnormal due to packet forwarding error. May cause the server to crash. In order to find out in time whether the second process is in an abnormal state and avoid the server down due to the abnormality of the second process, the state of the second process can be detected.

Further optionally, the server may detect, by the first process, whether the second process is in a normal state.

Specifically, as shown in FIG. 4, the foregoing S304 may include the following steps:

S3041: Send a response request to the second process by using the first process.

There may be communication mechanisms between the various processes of the operating system to implement inter-process communication, such as shared memory, sockets, and the like. In this embodiment, the response process may be sent to the second process by the first process, so that the second process responds to the response request.

S3042. If the response of the second process is received, determine that the second process is in a normal state.

It is easy to understand that if the server receives a response from the second process, such as responding to the response request, or returns a packet containing its own health status, the second process is in a normal state and no further operations are required on the second process.

S3043. If the response of the second process is not received, determine that the second process status is abnormal.

If the response of the second process is not received, for example, the second process does not respond to the response request, or does not return a packet containing its own health status, the second process may have stopped responding, indicating that the second process is operating abnormally. Further operations are performed on the second process to resume the second process.

S305. When an exception occurs in the second process, re-creating the second process and obtaining initialization result data from the memory.

In the embodiment of the present application, if the server detects that an abnormality occurs in the second process, the server may log off the second process that stops responding, release the memory space occupied by running the second process, and re-create the second process.

In the second process, the second process is abnormal because the virtual switch forwards the packet. For example, the second process stops responding. The second process needs to be restarted, so that the virtual switch can re-transmit the packet.

In the process of re-creating the second process, the first process has already initialized the virtual switch and caches the initialization result data into the memory, so the second process does not need to perform the above initialization operation, but The cached initialization result data, such as large page memory data, network card driver data, and network card queue information, can be obtained directly from the memory. It is not difficult to see that the above-mentioned initialization operation is not required in the second process. Compared with the prior art, the present application can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible. .

S306. In the second process of re-creation, the received packet is forwarded by using the obtained initialization result data by the initialized virtual switch.

In the embodiment of the present application, as described above, the server may re-create the second process, and may obtain initialization result data from the memory, and the server may use the obtained initialization result data, so in the second process of re-creation, The initialized virtual switch can forward and receive the received message by using the obtained initialization result data.

As an optional implementation manner of the embodiment of the present application, in order to further detect the state of the second process in time, when the first process sends a response request to the second process, the response may be sent to the second process at a preset time interval. request.

Exemplarily, the server may send a response request to the second process through the first process every 5 minutes, and if the second process responds to the response request, the second process runs normally.

As another optional implementation manner of the embodiment of the present application, if the server detects that the second process status is abnormal, in order to enable the operation and maintenance manager to know the second process status abnormality as soon as possible, the server may generate the second process status abnormality information. The notification message can be sent to the client used by the operation and maintenance personnel, such as a mobile device such as a computer, a tablet computer or a mobile phone, so that the operation and maintenance personnel can receive and view the notification message at any time. Alternatively, the server may display the notification message in the display device of the operation and maintenance system, so that the operation and maintenance personnel can see the notification message in time, locate the problem in time, and fix the problem.

When the program related to the packet forwarding of the virtual switch needs to be upgraded, the existing process of forwarding the packet based on the process needs to be deactivated. After the program file related to the forwarding of the virtual switch is upgraded, the process is re-executed in the process. Large page memory initialization and virtual switch network card driver initialization, get large page memory data and network card driver data, and then can forward messages. Obviously this method will take a lot of time.

When the process corresponding to the virtual switch stops responding or the virtual switch is upgraded, the virtual switch is unavailable. You need to start the virtual switch again to restore the packet forwarding service. As another optional implementation manner of the embodiment of the present application, the embodiment has a first process and a second process, and after the second process is logged off, the memory space is released, and the virtual switch message forwarding related program file is upgraded. After the second process is re-created, the cached initialization result data can be directly obtained from the memory, and the virtual switch is started. Since the initialization result data is cached to the memory, the service in the second process is restored, and the virtual switch is not required to be initialized. .

As another optional implementation manner of the embodiment of the present application, as described above, multiple virtual machines can be deployed in the server, and each virtual machine can have one virtual network card, which can forward the virtual network card of one virtual machine. The packet service is carried out in a process, so that multiple packet forwarding services can be performed in multiple processes to improve the parallel processing capability of the service.

The method for forwarding a packet based on the virtual switch provided by the embodiment of the present application can detect whether the second process is in a normal state or an abnormal state in time by detecting the state of the second process, and if the state is normal, continue in the second process. If the status is abnormal, the second process is restarted, so that different processing is performed according to different detection results to avoid server downtime due to the abnormality of the second process, thereby improving the reliability of the server.

Corresponding to the above method embodiment, the embodiment of the present application also provides a corresponding device embodiment.

Device embodiment 1

As shown in FIG. 5, the embodiment of the present application provides a packet forwarding device based on a virtual switch, including:

The initialization module 402 is configured to perform initialization of the virtual switch in the first process, obtain initialization result data, and cache the initialization result data into the memory.

In the embodiment of the present application, the initialization of the virtual switch may be performed in the first process by creating the first process created by the module. It is easy to understand that during the initialization process, the virtual switch needs to perform large page memory initialization, network card driver initialization, etc., which takes a lot of time. The initialization process of the virtual switch can be separately placed in one process through the initialization module.

As an optional implementation manner of the embodiment of the present application, in order to complete the initialization of the virtual switch as soon as possible, the first process may be created in the process of starting the server operating system, and the virtual switch is initialized in the first process. After the virtual switch is initialized and the initialization result data is cached in the memory, the server can enter the waiting state and wait for the calling command to call the cached initialization result data. By creating the first process in the process of starting the server operating system and initializing the virtual switch in the first process, the initialization of the virtual switch can be performed at the startup of the server, instead of waiting for the server to enter the operating interface of the operating system. The initialization of the virtual switch is performed, so that the initialization of the virtual switch is advanced, which is beneficial to improving the startup speed of the virtual switch.

The forwarding module 403 is configured to forward, by using the initialized virtual switch, the received packet by using the initialized virtual switch in the second process.

In this embodiment, the creating module may create a second process in the operating system, where the second process is a process different from the first process, and they respectively run in an operating system of the server. In the second process, the forwarding module can forward the received packet by using the cached initialization result data by the initialized virtual switch.

The creating module 401 is configured to re-create the second process when an abnormality occurs in the second process, and obtain initialization result data from the memory.

In the embodiment of the present application, if an abnormality occurs in the second process, the server may log out the second process that stops responding, release the memory space occupied by running the second process, and re-create the second process by creating a module.

As an optional implementation manner of the embodiment of the present invention, the creating module 401 can be used to create a first process.

As described above, when an existing virtual switch is running, the virtual machine is first initialized in a process, and then the packet is forwarded in the process. In the embodiment of the present application, a process may be first created by creating a module, which is referred to as a first process. Specifically, a first process may be created in a Linux operating system. The process of creating a process in the Linux operating system can be obtained by an existing process creation method, and details are not described herein again.

The forwarding module 402 is further configured to: in the second process that is re-created, forward the received packet by using the obtained initialization result data by the initialized virtual switch.

In the embodiment of the present application, as described above, the second process may be re-created, and the initialization result data may be obtained from the memory, and the server may use the obtained initialization result data, so that the second process in the re-creation is initialized. The virtual switch can forward and receive the received message by using the obtained initialization result data.

The virtual switch-based packet forwarding device provided by the embodiment of the present application can use the initialization result data in the second process by performing initialization of the virtual switch in the first process and buffering the initialization result data into the memory. After forwarding the received packet, even if the second process is abnormal, the virtual switch can directly forward the packet using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

Device embodiment 2

As shown in FIG. 6, the embodiment of the present application further provides a packet forwarding device based on a virtual switch, including:

A module 401 is created for creating a first process.

The forwarding module 403 is configured to forward, by using the initialized virtual switch, the received packet by using the initialized virtual data in the second process that has been created.

The detecting module 404 is configured to detect whether the second process is in a normal state.

In the embodiment of the present application, the initialized virtual switch uses the initialization result data, and in the process of forwarding the received packet in the second process, the second process may be abnormal due to packet forwarding error. May cause the server to crash. In order to detect whether the second process is in an abnormal state in time, and avoid the server downtime due to the abnormality of the second process, the state of the second process may be detected by the detecting module.

Further optionally, as shown in FIG. 7, the detecting module 404 may include:

The sending submodule 4041 is configured to send a response request to the second process by using the first process.

The determining submodule 4042 is configured to determine that the second process state is normal if the response of the second process is received, and determine that the second process state is abnormal if the response of the second process is not received.

The creating module 401 is further configured to re-create the second process when an abnormality occurs in the second process, and obtain initialization result data from the memory.

In the embodiment of the present application, if an abnormality is detected in the second process, the server may log off the second process that stops responding, release the memory space occupied by running the second process, and re-create the second process by creating a module.

The packet forwarding device based on the virtual switch provided by the embodiment of the present application can detect whether the second process is in a normal state or an abnormal state in time by detecting the state of the second process, and if the state is normal, continue in the second process. If the status is abnormal, the second process is restarted, so that different processing is performed according to different detection results to avoid server downtime due to the abnormality of the second process, thereby improving the reliability of the server.

The embodiment of the present application further provides a server. As shown in FIG. 8, the server 500 includes a processor 501 and a machine readable storage medium 502. The machine readable storage medium stores machine executable instructions executable by the processor. The processor is exemplified by machine executable instructions to implement the following steps:

The machine readable storage medium 502 may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

The server provided by the embodiment of the present application can perform the initialization of the virtual switch in the first process and cache the initialization result data into the memory, and the virtual switch can forward the received packet by using the initialization result data in the second process, even if the second The process is abnormal. After the second process is re-created, the virtual switch can directly forward the packets using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

The embodiment of the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program. When the computer program is executed by the processor, the following steps are performed:

The computer readable storage medium provided by the embodiment of the present application can perform the initialization of the virtual switch in the first process and cache the initialization result data into the memory, and the virtual switch can forward the received message by using the initialization result data in the second process. After the second process is re-created, the virtual switch can directly forward the packet using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

The embodiment of the present application further provides a computer program product comprising instructions, when executed on a computer, causing the computer to perform the following steps:

The computer program product including the instruction provided by the embodiment of the present application can perform the initialization of the virtual switch in the first process and cache the initialization result data into the memory, and the virtual switch can forward the received report by using the initialization result data in the second process. After the second process is re-created, the virtual switch can directly forward the packet using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

The embodiment of the present application also provides a computer program, when it is run on a computer, causes the computer to perform the following steps:

The computer program including the instruction provided by the embodiment of the present application can perform the initialization of the virtual switch in the first process and cache the initialization result data into the memory, and the virtual switch can forward the received message by using the initialization result data in the second process. After the second process is re-created, the virtual switch can directly forward the packet using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

The above processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; or may be a digital signal processing (DSP), dedicated integration. Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.

In this document, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such. The actual relationship or order. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The various embodiments in the present specification are described in a related manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are included in the scope of the present application.

Industrial applicability

Based on the packet forwarding method, the forwarding device, the server, and the storage medium provided by the embodiments of the present application, the virtual switch can be used in the second process by performing initialization of the virtual switch in the first process and buffering the initialization result data into the memory. After the second process is re-created, the virtual switch can directly forward the packet using the obtained initialization result data. The present invention can eliminate the time taken for re-initializing the virtual switch, so that the virtual switch can resume the packet forwarding service as soon as possible, thereby improving the report. Text forwarding efficiency.

Claims

A packet forwarding method based on a virtual switch, where the method includes:

Initializing the virtual switch in the first process, obtaining initialization result data, and buffering the initialization result data into the memory;

In the second process, the received message is forwarded by the initialized virtual switch by using the initialization result data;

When an abnormality occurs in the second process, re-creating the second process, and acquiring the initialization result data from the memory;

In the second process of re-creation, the received message is forwarded by the initialized virtual switch using the obtained initialization result data.
The packet forwarding method according to claim 1, wherein before the step of performing initialization of the virtual switch in the first process, the method further includes:

The first process is created during the startup of the operating system.
The message forwarding method according to claim 1, wherein the initializing of the virtual switch in the first process, obtaining the initialization result data, and buffering the initialization result data into the memory includes:

Large page memory initialization and network card driver initialization are performed in the first process to obtain large page memory data and network card drive data, and the large page memory data and the network card drive data are buffered into the memory.
The packet forwarding method according to claim 1, wherein the method further comprises: when the second process is re-created, and the initialization result data is obtained from the memory, the method further comprises:

Detecting whether the second process is in a normal state.
The packet forwarding method according to claim 4, wherein the detecting whether the second process is in a normal state comprises:

Sending a response request to the second process by using a first process;

If the response of the second process is received, determining that the second process status is normal;

If the response of the second process is not received, it is determined that the second process status is abnormal.
The packet forwarding method according to claim 5, wherein the sending the response request to the second process by using the first process comprises:

The response request is sent to the second process by the first process every preset time interval.
The packet forwarding method according to claim 5 or 6, wherein, after the response of the second process is not received, and the second process status is determined to be abnormal, the method further includes:

Generating a notification message of the second process status exception and displaying the notification message.
A packet forwarding device based on a virtual switch, wherein the device includes:

An initialization module, configured to perform initialization of the virtual switch in the first process, obtain initialization result data, and cache the initialization result data into the memory;

a forwarding module, configured to forward, by using the initialization result data, the received packet by the initialized virtual switch in the second process;

a module is further configured to: when an abnormality occurs in the second process, re-create the second process, and obtain the initialization result data from the memory;

The forwarding module is further configured to forward the received packet by using the obtained initialization result data by the initialized virtual switch in the second process of re-creation.
The message forwarding device of claim 8, wherein the device further comprises:

A module is created for creating the first process during an operating system startup process.
The message forwarding device according to claim 8, wherein the initialization module is specifically configured to:

Large page memory initialization and network card driver initialization are performed in the first process to obtain large page memory data and network card drive data, and the large page memory data and the network card drive data are buffered into the memory.
The message forwarding device of claim 8, wherein the device further comprises:

The detecting module is configured to detect whether the second process is in a normal state.
The packet forwarding device of claim 11, wherein the detecting module comprises:

a sending submodule, configured to send a response request to the second process by using a first process;

Determining a submodule, configured to determine that the second process status is normal if the response of the second process is received; and determine that the second process status is abnormal if the response of the second process is not received.
The packet forwarding device according to claim 12, wherein the sending submodule is specifically configured to:

The response request is sent to the second process by the first process every preset time interval.
The message forwarding device according to claim 12 or 13, wherein the device further comprises:

And a generating module, configured to generate a notification message of the second process status abnormality and display the notification message.
A server, comprising a processor and a machine readable storage medium, the machine readable storage medium storing machine executable instructions executable by the processor, the processor being executable by the machine The method steps of any one of claims 1 to 7 are carried out.
A computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program being executed by a processor to implement the method steps of any one of claims 1 to 7.
A computer program product comprising instructions, wherein the computer program product comprising instructions, when run on a computer, causes the computer to perform the method steps of any of claims 1-7.
A computer program, wherein the computer program, when run on a computer, causes the computer to perform the method steps of any of claims 1-7.