CN106803794B - Kvm virtual machine network card direct connection method and device for host - Google Patents
Kvm virtual machine network card direct connection method and device for host Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L61/00—Network arrangements, protocols or services for addressing or naming
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- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45595—Network integration; Enabling network access in virtual machine instances
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Abstract
The invention discloses a network card through method and a device for a kvm virtual machine of a host, which comprises the steps of receiving a network card through request sent by the virtual machine and determining the number of network cards required by the virtual machine; controlling a hardware virtualization function of a host and the Intel _ iommu to be in an open state; selecting a corresponding number of physical network cards from a PCI address list of the physical network cards in the host according to the number of the network cards required by the virtual machine, and acquiring PCI addresses of the selected physical network cards; splicing the xml configuration files of the selected physical network cards according to the PCI address; and calling a connection interface between the host and the virtual machine, and sending the xml configuration file to the virtual machine according to the identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards. The invention enables the virtual machine to directly use the physical network card of the host, simplifies the signal transmission process and optimizes the performance of the virtual machine.
Description
Technical Field
The invention relates to the technical field of virtualization, in particular to a network card direct connection method and device for a kvm virtual machine of a host.
Background
Virtualization refers to virtualizing a computer into a plurality of logical computers (virtual machines) by virtualization technology. A plurality of logic computers are simultaneously operated on one computer, each logic computer can operate different operating systems, and application programs can operate in mutually independent spaces without mutual influence, so that the working efficiency of the computer is obviously improved. The physical computer is called a host, and the plurality of logical computers are clients.
At present, a network card used by a virtual machine is a virtual network card, and is obtained by virtualizing a physical network card on a host, and the virtual machine cannot directly use the physical network card on the host, so that the network card performance of the virtual machine is poor, and the signal transmission speed is slow.
Therefore, how to provide a kvm virtual machine network card direct connection method for a host and a device thereof, which can improve the network card performance and the signal transmission rate of a virtual machine, is a problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
The invention aims to provide a network card direct connection method and a network card direct connection device for a kvm virtual machine of a host, so that the virtual machine can directly use a physical network card of the host, the signal transmission process is simplified, and the performance of the virtual machine is optimized.
In order to solve the technical problem, the invention provides a kvm virtual machine network card direct connection method for a host, which comprises the following steps:
receiving a network card direct connection request sent by a virtual machine, and determining the number of network cards required by the virtual machine;
controlling a hardware virtualization function of a host and the Intel _ iommu to be in an open state;
selecting a corresponding number of physical network cards from a PCI address list of the physical network cards in the host according to the number of the network cards required by the virtual machine, and acquiring PCI addresses of the selected physical network cards;
splicing the selected xml configuration files of the plurality of physical network cards according to the PCI address;
and calling a connection interface between a host and a virtual machine, and sending the xml configuration file to the virtual machine according to the identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards.
Preferably, the hardware virtualization function of the control host and the process of the Intel _ iommu being in the open state specifically include:
detecting whether the host is opened with a hardware virtualization function, and if not, controlling the host to open the hardware virtualization function;
and detecting whether the Intel _ iommu is in an open state, if not, re-editing and generating a configuration file of the host, and controlling the Intel _ iommu to open.
Preferably, the connection interface between the host and the virtual machine is specifically:
and the device comprises an attachDevice interface which is arranged on the host and provided by a libvirt C function library.
In order to solve the above technical problem, the present invention further provides a kvm virtual machine network card direct connection device for a host, including:
the request receiving module is used for receiving a network card direct connection request sent by a virtual machine and determining the number of network cards required by the virtual machine;
the function starting module is used for controlling the hardware virtualization function of the host and the Intel _ iommu to be in an open state;
the selection module is used for selecting a corresponding number of physical network cards from the PCI address list of the physical network cards in the host according to the number of the network cards required by the virtual machine and acquiring the PCI addresses of the selected physical network cards;
the splicing module is used for splicing the selected xml configuration files of the physical network cards according to the PCI addresses;
and the sending module is used for calling a connection interface between a host and a virtual machine, and sending the xml configuration file to the virtual machine according to the identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards.
Preferably, the function starting module specifically includes:
the hardware detection unit is used for detecting whether the host computer opens the hardware virtualization function or not, and controlling the host computer to open the hardware virtualization function if the host computer does not open the hardware virtualization function;
and the software detection unit is used for detecting whether the Intel _ iommu is in an open state or not, and if not, re-editing and generating the configuration file of the host to control the Intel _ iommu to open.
The invention provides a kvm virtual machine network card direct connection method and a device thereof for a host, wherein the host selects physical network cards with the number of virtual machine requests from a PCI address list of the physical network card after receiving a network card direct connection request sent by a virtual machine, splices an xml configuration file according to the PCI address of the selected physical network card, and then sends the spliced xml configuration file to the corresponding virtual machine, so that the selected physical network cards can be seen from the network card list of the virtual machine, the virtual machine can directly use the selected physical network cards, and compared with the mode of using the virtualized virtual network card, the mode of directly using the physical network card has the advantages of simple signal transmission process, higher signal transmission speed and improved network card performance of the virtual machine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a process of a kvm virtual machine network card direct connection method for a host according to the present invention;
fig. 2 is a schematic structural diagram of a kvm virtual machine network card pass-through device for a host provided in the present invention.
Detailed Description
The core of the invention is to provide a network card direct-connection method and a device for a kvm virtual machine of a host, so that the virtual machine can directly use a physical network card of the host, the signal transmission process is simplified, and the performance of the virtual machine is optimized.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a network card direct-connection method for a kvm virtual machine of a host, and referring to fig. 1, fig. 1 is a flow chart of a process of the network card direct-connection method for the kvm virtual machine of the host, which is provided by the invention; the method comprises the following steps:
step s 101: receiving a network card direct connection request sent by a virtual machine, and determining the number of network cards required by the virtual machine;
step s 102: controlling a hardware virtualization function of a host and the Intel _ iommu to be in an open state;
step s 103: selecting a corresponding number of physical network cards from a PCI (peripheral component Interconnect, peripheral component Interconnect bus) address list of the physical network cards in the host according to the number of the network cards required by the virtual machine, and acquiring PCI addresses of the selected physical network cards;
step s 104: splicing the xml configuration files of the selected physical network cards according to the PCI address;
in specific implementation, the PCI address list of the physical network card in the host is listed through lspci | grep Ethernet. The specific configuration content of the xml configuration file of each physical network card is as follows:
in the above configuration, one physical network card is uniquely identified by the PCI address of the physical network card, that is, < addressdomain ═ 0x0000 'bus ═ 0x 04' slot ═ 0x00 'function ═ 0x 1'/>, where the specific values of domain, bus, slot, and function are the PCI address of the physical network card; for example, if the PCI address of the selected physical network card is 04:00:3, the corresponding xml configuration file is:
step s 105: and calling a connection interface between the host and the virtual machine, and sending the xml configuration file to the virtual machine according to the identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards.
Wherein, the process of step s102 specifically includes:
detecting whether a host computer opens a hardware virtualization function, and if not, controlling the host computer to open the hardware virtualization function;
and detecting whether the Intel _ iommu is in an open state, if not, re-editing and generating a configuration file of the host, and controlling the Intel _ iommu to open.
It should be noted that the order of the above two steps is not limited, and the two steps can also be performed in parallel, which is not limited in the present invention.
In specific implementation, whether Intel _ iommu is started or not is detected through cat/proc/cmdlene, if not, the host configuration file/etc/default/grub is edited again, and then a grub 2-mkconfig-o/boot/grub 2/grub command is executed to regenerate the configuration file, wherein the configuration file takes effect after the host is restarted.
Preferably, the connection interface between the host and the virtual machine is specifically:
and the device comprises an attachDevice interface which is installed on the host and provided by a libvirt C function library.
It can be understood that libvirt is a free and open source C-function library supporting mainstream virtualization tools in Linux, and is intended to provide a convenient and reliable programming interface for various virtualization tools including Xen.
The invention provides a kvm virtual machine network card direct-connection method for a host, which comprises the steps that after the host receives a network card direct-connection request sent by a virtual machine, physical network cards with the number of the virtual machine requests are selected from a PCI address list of the physical network card of the host, xml configuration files are spliced according to the PCI addresses of the selected physical network cards, and then the spliced xml configuration files are sent to the corresponding virtual machine, so that the selected physical network cards can be seen from the network card list of the virtual machine, the virtual machine can directly use the selected physical network cards, compared with the mode of directly using the physical network cards, the signal transmission process is simple, the signal transmission speed is higher, and the network card performance of the virtual machine is improved.
The invention further provides a kvm virtual machine network card through device for a host, as shown in fig. 2, fig. 2 is a schematic structural diagram of the kvm virtual machine network card through device for the host provided by the invention. The device includes:
the request receiving module 1 is used for receiving a network card direct connection request sent by the virtual machine and determining the number of network cards required by the virtual machine;
the function starting module 2 is used for controlling the hardware virtualization function of the host and the Intel _ iommu to be in an open state;
the selecting module 3 is used for selecting a corresponding number of physical network cards from the PCI address list of the physical network cards in the host according to the number of the network cards required by the virtual machine, and acquiring the PCI addresses of the selected physical network cards;
the splicing module 4 is used for splicing the xml configuration files of the selected physical network cards according to the PCI address;
and the sending module 5 is used for calling a connection interface between the host and the virtual machine, and sending the xml configuration file into the virtual machine according to the identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards.
Wherein, the function opening module 2 specifically includes:
the hardware detection unit is used for detecting whether the hardware virtualization function is opened by the host computer, and controlling the host computer to start the hardware virtualization function if the hardware virtualization function is not opened;
and the software detection unit is used for detecting whether the Intel _ iommu is in an open state or not, and if not, re-editing and generating a configuration file of the host to control the Intel _ iommu to open.
The invention provides a kvm virtual machine network card direct connection device for a host, which is characterized in that after the host receives a network card direct connection request sent by a virtual machine, physical network cards with the number of the virtual machine requests are selected from a PCI address list of the physical network card of the host, an xml configuration file is spliced according to the PCI addresses of the selected physical network cards, and then the spliced xml configuration file is sent to the corresponding virtual machine, so that the selected physical network cards can be seen from the network card list of the virtual machine, the virtual machine can directly use the selected physical network cards, and compared with the mode of directly using the physical network cards and using the virtual network cards after virtualization, the mode of directly using the physical network cards has the advantages of simple signal transmission process and higher signal transmission speed, and the network card performance of the virtual machine is improved.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A kvm virtual machine network card direct-connection method for a host is characterized by comprising the following steps:
receiving a network card direct connection request sent by a virtual machine, and determining the number of network cards required by the virtual machine;
controlling a hardware virtualization function of a host and the Intel _ iommu to be in an open state;
selecting a corresponding number of physical network cards from a PCI address list of the physical network cards in the host according to the number of the network cards required by the virtual machine, and acquiring PCI addresses of the selected physical network cards;
splicing the selected xml configuration files of the plurality of physical network cards according to the PCI address;
calling a connection interface between a host and a virtual machine, and sending the xml configuration file to the virtual machine according to the identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards;
the hardware virtualization function of the control host and the process that the Intel _ iommu is in the open state specifically include:
detecting whether the host is opened with a hardware virtualization function, and if not, controlling the host to open the hardware virtualization function;
and detecting whether the Intel _ iommu is in an open state, if not, re-editing and generating a configuration file of the host, and controlling the Intel _ iommu to open.
2. The method according to claim 1, wherein the connection interface between the host and the virtual machine is specifically:
and the device comprises an attachDevice interface which is arranged on the host and provided by a libvirt C function library.
3. A kvm virtual machine network card through device for a host, comprising:
the request receiving module is used for receiving a network card direct connection request sent by a virtual machine and determining the number of network cards required by the virtual machine;
the function starting module is used for controlling the hardware virtualization function of the host and the Intel _ iommu to be in an open state;
the selection module is used for selecting a corresponding number of physical network cards from the PCI address list of the physical network cards in the host according to the number of the network cards required by the virtual machine and acquiring the PCI addresses of the selected physical network cards;
the splicing module is used for splicing the selected xml configuration files of the physical network cards according to the PCI addresses;
a sending module, configured to invoke a connection interface between a host and a virtual machine, and send the xml configuration file to the virtual machine according to an identifier of the virtual machine carried in the network card direct connection request, so that the virtual machine can use the selected physical network cards;
the function starting module specifically comprises:
the hardware detection unit is used for detecting whether the host computer opens the hardware virtualization function or not, and controlling the host computer to open the hardware virtualization function if the host computer does not open the hardware virtualization function;
and the software detection unit is used for detecting whether the Intel _ iommu is in an open state or not, and if not, re-editing and generating the configuration file of the host to control the Intel _ iommu to open.
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| CN107733889A (en) * | 2017-10-13 | 2018-02-23 | 郑州云海信息技术有限公司 | A kind of Network Access Method of virtual machine, device, equipment and storage medium |
| CN108847975B (en) * | 2018-06-12 | 2021-06-25 | 京信通信系统（中国）有限公司 | Communication method, device, computer equipment and medium based on NFV (network function virtualization) architecture |
| CN109558210B (en) * | 2018-11-21 | 2021-01-15 | 苏州浪潮智能科技有限公司 | Method and system for virtual machine to apply GPU (graphics processing Unit) equipment of host |
| CN110196754A (en) * | 2019-04-24 | 2019-09-03 | 苏州浪潮智能科技有限公司 | The direction connection method and device of a kind of GPU equipment at Linux KVM |
| CN113485756A (en) * | 2021-06-30 | 2021-10-08 | 深圳市科力锐科技有限公司 | Hardware equipment configuration method, device, equipment and storage medium |
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