CN111586196B - Method, device and system for realizing network double stacks of virtual machine - Google Patents
Method, device and system for realizing network double stacks of virtual machine Download PDFInfo
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- CN111586196B CN111586196B CN202010263963.6A CN202010263963A CN111586196B CN 111586196 B CN111586196 B CN 111586196B CN 202010263963 A CN202010263963 A CN 202010263963A CN 111586196 B CN111586196 B CN 111586196B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/686—Types of network addresses using dual-stack hosts, e.g. in Internet protocol version 4 [IPv4]/Internet protocol version 6 [IPv6] networks
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- G—PHYSICS
- 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
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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- G—PHYSICS
- 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
- G06F2009/45595—Network integration; Enabling network access in virtual machine instances
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
- H04L2101/659—Internet protocol version 6 [IPv6] addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
- H04L63/0236—Filtering by address, protocol, port number or service, e.g. IP-address or URL
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
- H04L63/0263—Rule management
Abstract
The invention discloses a method, a device and a system for realizing network double stacks of a virtual machine, wherein the method comprises the following steps: receiving a network binding request sent by a virtual machine; judging the type of the network requested to be bound according to the network binding request sent by the virtual machine; if the network type requested to be bound is an IPv4 network, a first network card is created, an IPv4 address is automatically acquired, and the IPv4 address is returned to the virtual machine; if the network type requested to be bound is an IPv6 network, creating a second network card according to a router associated with an IPv6 network, configuring an IPv6 address through the router, and returning the IPv6 address to the virtual machine; the application scenes of a plurality of sub-networks under different networks can be bound simultaneously in a multi-network-card mode in the virtual machine, so that the method is more flexible and more suitable for the underlying network deployment environment.
Description
Technical Field
The invention relates to the technical field of virtual machines, in particular to a method, a device and a system for realizing network double stacks of a virtual machine.
Background
With the gradual development and maturity of IP (Internet Protocol) v6 network technology, it is required that virtual machines in a cloud computing network must simultaneously support IPv4 and IPv6 dual Protocol stacks.
At present, the implementation manner of the network card in the virtual machine to implement the dual stack function is generally that one network card has two IP addresses, one IPv4 address and one IPv6 address. However, a network card can only belong to the same network, i.e. the IPv4 and IPv6 subnets used by the dual stack must belong to the same network. In actual use, many scenarios require two networks, i.e., an IPv4 and an IPv6, to be bound simultaneously. This need is not supported in the prior art.
Disclosure of Invention
The invention provides a method, a device and a system for realizing network double stacks of a virtual machine, which aim to solve the problem that in the prior art, one network card can only bind subnets under the same network to realize the network double stacks.
A method for realizing network double stacks of a virtual machine comprises the following steps:
receiving a network binding request sent by a virtual machine;
judging the type of the network requested to be bound according to the network binding request sent by the virtual machine;
if the network type requested to be bound is an IPv4 network, a first network card is created, an IPv4 address is automatically acquired, and the IPv4 address is returned to the virtual machine;
and if the network type requested to be bound is the IPv6 network, creating a second network card different from the first network card according to a router associated with an IPv6 network, configuring an IPv6 address through the router, and returning the IPv6 address to the virtual machine.
And further, judging the type of the network requested to be bound according to the request parameters in the received network binding request.
Further, the first network card or the second network card is created according to the request parameters.
Further, the router configures the IPv6 address through DHCPv 6.
Further, if the network type of the binding request is the IPv6 network and the router is not associated, the flow ends.
Further, after the obtained IP address of the corresponding network type is returned to the virtual machine, the method further includes:
binding a firewall for the first network card or the second network card; and for the IPv6 network, confirming that the firewall has opened the IPv6 rule;
and after the firewall is bound successfully, associating the first network card or the second network card with the virtual machine.
An apparatus for implementing network dual stack of virtual machines, the apparatus comprising:
the communication module is used for receiving a network binding request sent by the virtual machine;
the network type judging module is used for judging the network type required to be bound according to the network binding request sent by the virtual machine;
the address allocation module is used for creating a first network card when the network type requested to be bound is an IPv4 network, automatically acquiring an IPv4 address and returning the IPv4 address to the virtual machine; when the type of the network requested to be bound is the IPv6 network, a second network card different from the first network card is created according to a router associated with the IPv6 network, an IPv6 address is configured through the router, and the IPv6 address is returned to the virtual machine.
Further, the network type judgment module is used for judging the network type requested to be bound according to the request parameters in the received network binding request;
the address allocation module is used for creating the first network card or the second network card according to the request parameter.
Further, the device further comprises an association module, which is used for binding a firewall to the first network card or the second network card after the acquired IP address of the corresponding network type is returned to the virtual machine; and for the IPv6 network, confirming that the firewall has opened the IPv6 rule; and after the firewall is bound successfully, associating the first network card or the second network card with the virtual machine.
A virtual machine network dual-stack system comprises the virtual machine network dual-stack implementation device, a virtual machine and a router.
The method, the device and the system for realizing the network double stacks of the virtual machine at least have the following beneficial effects:
(1) the application scenes of a plurality of sub-networks under different networks can be bound simultaneously by means of a plurality of network cards in the virtual machine, so that the method is more flexible and more suitable for the underlying network deployment environment. By adopting the technical scheme of the invention, when the virtual machine binds the network, the subnets belonging to different networks can be selected, thereby realizing the double stack of the virtual machine network;
(2) the distribution of IPv6 addresses is better controlled, the DHCPv6 mode can record the addresses distributed to IPv6 hosts and can also distribute specific addresses to specific IPv6 hosts so as to facilitate network management, the DHCPv6 supports the distribution of IPv6 prefixes to network equipment so as to facilitate the automatic configuration and network hierarchical management of the whole network, and besides the distribution of IPv6 addresses/prefixes to IPv6 hosts, the DHCPv6 mode can also distribute network configuration parameters such as DNS server IPv6 addresses.
Drawings
Fig. 1 is a flowchart of an embodiment of a method for implementing a network dual stack of a virtual machine according to the present invention.
Fig. 2 is a flowchart of another embodiment of a method for implementing a network dual stack of a virtual machine according to the present invention.
FIG. 3 is a diagram illustrating a four-step interactive address assignment process of DHCPv 6.
Fig. 4 is a schematic structural diagram of an embodiment of an apparatus for implementing a network dual stack of a virtual machine according to the present invention.
Fig. 5 is a schematic structural diagram of an embodiment of a virtual machine network dual-stack system provided in the present invention.
Detailed description of the preferred embodiments
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 1, this embodiment provides a method for implementing a virtual machine network dual stack, including:
step S101, receiving a network binding request sent by a virtual machine;
step S102, judging the network type requested to be bound according to the network binding request sent by the virtual machine;
step S103, if the network type requested to be bound is an IPv4 network, a first network card is created, an IPv4 address is automatically obtained, and the IPv4 address is returned to the virtual machine;
step S104, if the network type requested to be bound is an IPv6 network, a second network card is created according to a router associated with an IPv6 network, an IPv6 address is configured through the router, and the IPv6 address is returned to the virtual machine.
It should be noted that, the first network card and the second network card are only used to distinguish different network cards, and no specific sequence is used.
Specifically, step S101 is executed, where the virtual machine, as a resource invocation side, initiates a request to the resource server to request network binding, and the resource server receives the network binding request, where the network binding request includes a request parameter.
Further, step S102 is executed, and the resource server determines the network type requested to be bound according to the request parameter in the request for binding the network. The network types include IPv4 networks and IPv6 networks.
In step S103, if the network type requested to be bound is an IPv4 network, a first network card is created, an IPv4 address is automatically obtained, and the IPv4 address is returned to the virtual machine. Since the IPv4 network can automatically acquire the IP address when binding, no router is needed to participate.
In step S104, if the type of the network requested to be bound is an IPv6 network, it needs to be further determined whether the network is associated with a router, if no router is associated, the process is ended, and if a router is associated, a second network card is created according to the router associated with the IPv6 network, and an IPv6 address is configured through the router, and the IPv6 address is returned to the virtual machine. IPv6 networks require IP addresses/prefixes to be obtained by routers.
The IPv6 protocol has the characteristic of huge address space, but at the same time, the IPv6 address with the length of 128 bits requires an efficient and reasonable automatic address allocation and management strategy. The IPv6 stateless address configuration mode is an IPv6 address automatic configuration mode which is widely adopted at present. The host configured with the protocol can automatically configure the local address according to prefix information contained in the notification message only by starting an IPv6 route notification function by the adjacent equipment.
However, the device in the stateless address configuration scheme does not record the specific address information of the connected IPv6 host, and the manageability is poor. Moreover, the stateless address configuration method cannot enable the IPv6 host to obtain configuration information such as an IPv6 address of a Domain Name System (DNS) server, and has certain defects in availability. For Internet Service providers (IPS), there is no relevant specification indicating how to automatically assign IPv6 prefixes to devices, so at present, when an IPv6 network is deployed, only a manual configuration method can be used to configure IPv6 addresses for devices.
First, an IPv6 Dynamic Host Configuration Protocol (DHCPv6 for short) for IPv6 is introduced, where the DHCPv6 belongs to a stateful address auto-Configuration Protocol, and is designed for an IPv6 addressing scheme to allocate IPv6 addresses/prefixes and other network Configuration parameters to hosts.
In step S104, the router configures the IPv6 address through DHCPv 6.
The DHCPv6 specific address assignment procedure is as follows:
the client carries a Rapid Commit option in the sent Solicit message, and marks that the client expects that the server can rapidly allocate an address and network configuration parameters for the client;
after the router receives the Solicit message, if the DHCPv6 server supports Rapid address allocation, the router directly returns a Reply message to allocate an IPv6 address and other network configuration parameters to the client, and the Reply message also carries a Rapid Commit option; if the DHCPv6 server does not support the rapid allocation process, a four-step interaction mode is adopted to allocate IPv6 addresses/prefixes and other network configuration parameters to the client. IP addresses/prefixes are assigned by routers when binding IPv6 networks.
Four-step inter-address assignment is often used in the case where there are multiple DHCPv6 servers in the network. The DHCPv6 client firstly sends a Solicit message through multicast to locate a DHCPv6 server which can provide service for the DHCPv 3578 server, after receiving advertisement messages of a plurality of DHCPv6 servers, selects a server which distributes address and configuration information for the DHCPv6 server according to the priority of the DHCPv6 server, and then completes the address application and distribution process through Request/Reply message interaction.
As shown in fig. 2, the DHCPv6 four-step interactive address assignment process is as follows:
the DHCPv6 client sends a Solicit message to request the DHCPv6 server to distribute an IPv6 address and network configuration parameters for the DHCPv6 server;
if the Solicit message does not carry the Rapid Commit option, or the Solicit message carries the Rapid Commit option but the server does not support the Rapid distribution process, the DHCPv6 server replies an advertisement message to inform the client of the address and the network configuration parameters which can be distributed for the client; if the client of the DHCPv6 receives an Advertise message replied by a plurality of servers, selecting a server with the highest priority according to parameters such as server priority in the Advertise message, and sending a Request multicast message to all the servers, wherein the message carries a DHCP equipment Unique Identifier (DHCPv6 Unique Identifier, DUID for short) of the selected DHCPv6 server;
the DHCPv6 server replies Reply message to confirm that the address and network configuration parameters are allocated to the client for use.
Compared with other IPv6 address allocation modes, the DHCPv6 has the following advantages:
1. the distribution of IPv6 addresses is better controlled, and the DHCPv6 mode can record the addresses distributed to IPv6 hosts and can also distribute specific addresses to specific IPv6 hosts so as to facilitate network management.
2. The DHCPv6 supports the allocation of IPv6 prefixes to network devices, facilitating automatic network-wide configuration and network-hierarchical management.
3. Besides allocating IPv6 address/prefix for IPv6 host, network configuration parameters such as DNS server IPv6 address can be allocated.
Further, referring to fig. 3, after the obtained IP address of the corresponding network type is returned to the virtual machine, the method further includes:
binding a firewall for the first network card or the second network card; and for the IPv6 network, confirming that the firewall has opened the IPv6 rule;
and after the firewall is bound successfully, associating the first network card or the second network card with the virtual machine.
The method for implementing a network dual stack of a virtual machine according to this embodiment can implement simultaneous binding of application scenarios of multiple subnets in different networks by using multiple network cards in the virtual machine, is more flexible, and better conforms to a network deployment environment at a bottom layer.
Referring to fig. 4, an embodiment of the present invention further provides an apparatus for implementing a virtual machine network dual stack, where the apparatus is applied to a resource server, and the apparatus includes:
a communication module 201, configured to receive a network binding request sent by a virtual machine;
the network type judging module 202 is configured to judge a network type requested to be bound according to a network binding request sent by the virtual machine;
the address allocation module 203 is configured to create a first network card when the network type requested to be bound is an IPv4 network, automatically acquire an IPv4 address, and return the IPv4 address to the virtual machine; when the type of the network requested to be bound is an IPv6 network, a second network card is created according to a router related to an IPv6 network, an IPv6 address is configured through the router, and the IPv6 address is returned to the virtual machine.
The network binding request received by the communication module 201 includes request parameters.
The network type judgment module 202 is configured to judge a network type requested to be bound according to a request parameter in the received network binding request;
the address allocation module 203 is configured to create the first network card or the second network card according to the request parameter.
Specifically, the router configures the IPv6 address through DHCPv 6.
Further, the apparatus provided in this embodiment further includes an association module 204, configured to bind a firewall to the first network card or the second network card after the obtained IP address of the corresponding network type is returned to the virtual machine; and for the IPv6 network, confirming that the firewall has opened the IPv6 rule; and after the firewall is bound successfully, associating the first network card or the second network card with the virtual machine.
Referring to fig. 5, another embodiment of the present invention further provides a virtual machine network dual stack system, which includes the above-mentioned virtual machine network dual stack implementation apparatus 301, further includes a virtual machine 302 and a router 303.
The virtual machine network dual stack system provided by this embodiment can realize the application scenario of simultaneously binding multiple subnets under different networks in a multi-network card manner in the virtual machine, is more flexible, and better conforms to the underlying network deployment environment, and when the virtual machine binds a network, subnets belonging to different networks can be selected, thereby realizing virtual machine network dual stack.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for realizing network double stacks of a virtual machine is characterized by comprising the following steps:
receiving a network binding request sent by a virtual machine;
judging the type of the network requested to be bound according to the network binding request sent by the virtual machine;
if the network type requested to be bound is an IPv4 network, a first network card is created, an IPv4 address is automatically acquired, and the IPv4 address is returned to the virtual machine;
and if the network type requested to be bound is the IPv6 network, creating a second network card different from the first network card according to a router associated with an IPv6 network, configuring an IPv6 address through the router, and returning the IPv6 address to the virtual machine.
2. The method for implementing network dual stack of virtual machine according to claim 1, wherein the type of the network requested to be bound is determined according to request parameters in the received request for binding the network.
3. The method for implementing the dual stack of the virtual machine network as claimed in claim 2, wherein the first network card or the second network card is created according to the request parameter.
4. The method for implementing the dual stack of the virtual machine network as claimed in claim 1, wherein the router configures the IPv6 address through DHCPv 6.
5. The method for implementing dual stack of virtual machine network as claimed in claim 1, wherein if the network type of the requested binding is IPv6 network and no router is associated, the procedure is ended.
6. The method for implementing the network dual stack of the virtual machine according to claim 1, wherein after the obtained IP address of the corresponding network type is returned to the virtual machine, the method further comprises:
binding a firewall for the first network card or the second network card; and for the IPv6 network, confirming that the firewall has opened the IPv6 rule;
and after the firewall is bound successfully, associating the first network card or the second network card with the virtual machine.
7. An apparatus for implementing a network dual stack of a virtual machine, the apparatus comprising:
the communication module is used for receiving a network binding request sent by the virtual machine;
the network type judging module is used for judging the network type required to be bound according to the network binding request sent by the virtual machine;
the address allocation module is used for creating a first network card when the network type requested to be bound is an IPv4 network, automatically acquiring an IPv4 address and returning the IPv4 address to the virtual machine; when the type of the network requested to be bound is an IPv6 network, a second network card different from the first network card is created according to a router associated with an IPv6 network, an IPv6 address is configured through the router, and the IPv6 address is returned to the virtual machine.
8. The apparatus for implementing dual stack of network of virtual machine according to claim 7, wherein the network type determining module is configured to determine a network type requested to be bound according to a request parameter in the received request for binding network;
the address allocation module is used for creating the first network card or the second network card according to the request parameters.
9. The device for implementing the network dual stack of the virtual machine according to claim 7, wherein the device further comprises an association module, configured to bind a firewall to the first network card or the second network card after the obtained IP address of the corresponding network type is returned to the virtual machine; and for the IPv6 network, confirming that the firewall has opened the IPv6 rule; and after the firewall is bound successfully, associating the first network card or the second network card with the virtual machine.
10. A virtual machine network dual stack system comprising the virtual machine network dual stack implementation apparatus as claimed in any one of claims 7 to 9, further comprising a virtual machine and a router.
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