CN108307002A - A kind of DHCP message processing method and processing device - Google Patents

Abstract

The invention discloses a dynamic host configuration protocol DHCP message processing method and device, the method comprising: a DHCP agent node receives a request from a service network, and the request is used to assign an IP address to a virtual machine or a physical machine; the DHCP The proxy node obtains the IP address from the DHCP service node according to the request in the management network; the DHCP proxy node sends the acquired IP address to the virtual machine or physical machine. In this method, by deploying a DHCP agent node in the data center, the DHCP agent node has the function of freely forwarding messages or messages between the service network and the management network, thereby realizing the automatic configuration of the IP address, saving management costs, and also It avoids the operation of the administrator to manually configure the IP address, and improves the connection efficiency.

Description

Method and device for processing DHCP messages

technical field

The present application relates to the technical field of network communication, in particular to a DHCP message processing method and device.

Background technique

During the data center construction process, at least one independent business area and one centralized operation and maintenance management area are usually set up. Among them, the business area is used to deploy various types of business systems, while the operation and maintenance management area is used to deploy the management and operation and maintenance platforms of various software and hardware systems, and is isolated from the business network.

Specifically, various management nodes are deployed in the operation and maintenance management area, and virtual machines or physical machines for various business systems are deployed in each business area. Wherein, each management node deployed in the operation and maintenance management area is used to provide a management and operation and maintenance platform for virtual machines or physical machines in the business area.

In order to realize the unified management of Internet Protocol (IP) addresses of virtual machines or physical machines in the service area, the Dynamic Host Configuration Protocol (DHCP) service nodes used to allocate IP addresses are usually deployed in the operation and maintenance management area. When an administrator deploys a virtual machine or physical machine in a certain business area, the virtual machine or physical machine needs to send a DHCP request through the business network to obtain an IP address. The DHCP is a layer-2 network protocol. The service network in the business area and the management network in the operation and maintenance management area are disconnected at the second layer, so that the DHCP broadcast cannot be sent from the virtual machine or physical machine in the business area to the DHCP service in the operation and maintenance management area. node, which in turn prevents virtual machines or physical machines from using DHCP broadcasts to automatically configure IP addresses.

Contents of the invention

This application deploys a DHCP agent node, so that the DHCP agent node can forward the DHCP broadcast obtained from the service network to the DHCP service node located on the management node through the management network, so as to solve the problem of isolation between the service network and the management network As a result, the virtual machine or physical machine cannot realize the automatic configuration of the IP address.

Specifically, the application discloses the following technical solutions:

In a first aspect, the present application provides a dynamic host configuration protocol DHCP message processing method, the method comprising: a DHCP proxy node receives a request from a service network, and the request is used to indicate the allocation of an IP address for a virtual machine or a physical machine; The DHCP proxy node sends the request to the DHCP service node, acquires an IP address from the DHCP service node in the management network according to the request; and sends the IP address to the virtual machine or physical machine.

Optionally, the request includes a DHCP Discover broadcast message in the DHCP protocol.

Optionally, the IP address may be carried by a DHCP Offer message in the DHCP protocol.

In this aspect, message forwarding between the management network and the service network can be realized by configuring the DHCP proxy node, and then the virtual machine or the physical machine is automatically assigned an IP address.

With reference to the first aspect, in an implementation manner of the first aspect, the receiving the request by the DHCP proxy node from the service network includes: the DHCP proxy node receiving the request from the virtual machine or the physical machine through the first network card , the first network card is used to access the service network, so as to implement receiving and sending of the request in the service network.

With reference to the first aspect, in another implementation manner of the first aspect, the DHCP proxy node acquires an IP address from the DHCP service node according to the request in the management network, including: the DHCP proxy node receives the IP address through the second network card The DHCP service node allocates the IP address according to the request, and the second network card is used to access the management network, so as to realize receiving and sending of the IP address in the management network.

With reference to the first aspect, in yet another implementation manner of the first aspect, the first network card is located on a host where the second network card is located, and the DHCP proxy node is deployed on the host where the second network card is located.

In a second aspect, the present application also provides a DHCP proxy node, including a receiving module and a sending module, wherein the receiving module is used to receive a request from the service network, and receive a request from the DHCP service node in the management network according to the request Obtaining an IP address, the request is used to indicate to assign an IP address to a virtual machine or a physical machine; the sending module is configured to send the IP address to the virtual machine or a physical machine.

With reference to the second aspect, in an implementation manner of the second aspect, the receiving module is specifically configured to receive the request from the virtual machine or the physical machine through a first network card, and the first network card is used to access the business network.

With reference to the second aspect, in another implementation manner of the second aspect, the receiving module is specifically configured to receive the IP address assigned by the DHCP service node according to the request through a second network card, and the second network card Used to access the management network.

With reference to the second aspect, in yet another implementation manner of the second aspect, the first network card is located on a host where the second network card is located, and the DHCP proxy node is deployed on the host where the second network card is located.

In a third aspect, the present application also provides a data center, the data center includes at least one computing device, each of the computing devices includes a processor and a memory, and the at least one processor executes a method for controlling a DHCP proxy node, DHCP service nodes and virtual machines,

The DHCP proxy node is configured to receive a request from a service network, obtain an IP address from a DHCP service node in the management network according to the request, and send the IP address to a virtual machine or a physical machine, wherein the request is used to indicate Allocate an IP address for the virtual machine or physical machine.

With reference to the third aspect, in an implementation manner of the third aspect, the processor is specifically configured to control the DHCP agent node to receive the request from the virtual machine or the physical machine through the first network card, and the second A network card is used to access the service network.

With reference to the third aspect, in another implementation manner of the third aspect, the processor is specifically configured to control the DHCP proxy node to receive the IP address assigned by the DHCP service node according to the request through the second network card , the second network card is used to access the management network.

With reference to the third aspect, in yet another implementation manner of the third aspect, the first network card is located on a host where the second network card is located, and the DHCP proxy node is deployed on the host where the second network card is located.

In the fourth aspect, the present application also provides a computer storage medium, which can store instructions, and when the instructions are executed, the first aspect provided by the present application and the various implementation modes described in the first aspect can be realized. Some or all steps of the DHCP message processing method.

Wherein, the storage medium includes the memory in the computing device in the third aspect.

In a fifth aspect, the present application further provides a computer program product including instructions, and when the instructions are run on a computer, the computer executes the DHCP message processing method described in the above aspects.

In the method provided by this application, a DHCP agent node is deployed in the data center, and the DHCP agent node has the function of freely forwarding messages or messages between the service network and the management network, such as realizing the message sending and receiving of the service network through the first network card, The second network card is used to realize the message sending and receiving of the management network, thereby solving the problem that the virtual machine or physical machine cannot realize the automatic configuration of the IP address due to the isolation of the business network and the management network in the cloud platform. This method realizes the IP address. Automatic configuration saves management costs and avoids manual configuration of IP addresses by administrators, improving connection efficiency.

Description of drawings

In order to illustrate the technical solution of the present application more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, on the premise of not paying creative labor, Additional drawings can also be derived from these drawings.

Fig. 1 is a schematic structural diagram of a data center provided by the present application;

Fig. 2 is the flowchart of a kind of DHCP message processing method that the present application provides;

Fig. 3 is a schematic diagram of a DHCP lease process provided by the present application;

Fig. 4 is the flow chart of another kind of DHCP message processing method that the present application provides;

Fig. 5 is a schematic diagram of a DHCP message forwarding provided by the present application;

Fig. 6 is a schematic structural diagram of a DHCP proxy node provided by the present application;

FIG. 7 is a schematic structural diagram of a computing device provided in the present application.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, and to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application are described below in conjunction with the accompanying drawings The program is described in further detail.

First, introduce and explain the technical scenarios and system functional entities of this application, as well as technical terms.

As shown in Figure 1, it is a schematic structural diagram of a data center provided by the embodiment of the present application. The data center may be a cloud management platform or a cloud data center, wherein the data center deploys at least one host (that is, a computing device) , a virtual machine or a management node can be deployed on any host of at least one host, and at the same time, any host of at least one host can also be provided to users as a physical machine without virtualization to provide services for users. Exemplarily, Figure 1 draws a situation where a virtual machine and a management node are deployed on a host at the same time. In addition, only a virtual machine can be deployed on a host without a management node, which is not done in this embodiment of the present application. limit.

In the data center shown in Figure 1, the area formed by each management node and nodes related to the management node can be called the operation and maintenance management area, and the network formed by it is the management network; all business and business-related virtual machines and physical machines The area formed by the network can be called a service area, and the network formed by it is a service network. In the operation and maintenance management area, management nodes are used to create and configure virtual machines and configure physical machines, and the management nodes include computing nodes and network nodes.

Optionally, the management node in this application may include a DHCP service node for assigning an IP address and other parameters to a virtual machine or a physical machine. The management node may also not include the DHCP service node, which is not limited in this application.

In addition, the service area may only include virtual machines, that is, only virtual machines are used to provide services for users, which is not limited in this embodiment of the present application.

The host where the virtual machine is located and the physical machine are connected to the service network through the first network card, so that each virtual machine or physical machine communicates with other virtual machines or physical machines on the service network. At the same time, the host where the virtual machine is located and the physical machine are connected to the management network through the second network card, so that the management node configures the physical machine, creates and configures the virtual machine through the management network. The first network card and the second network card configured on the host realize the isolation of the service network and the management network. The isolation means that the management nodes in the management network can only create and configure virtual machines, and cannot intervene in services. For example, when a virtual machine in a service network is transmitting services, the management node cannot obtain data transmitted by the services.

As shown in Figure 1, in the service area, each virtual machine communicates with each other and establishes a service network through the first network card. The respective first network cards are connected to the service network, and realize different service functions in the service network.

A DHCP proxy node is also deployed on the host where the virtual machine is located. The DHCP agent node is a process on the host, which can monitor the first network card and the second network card on the host respectively, so as to communicate with the virtual machine or physical machine of the service network and the management node in the management network. The DHCP agent node forwards the message from the DHCP service node monitored from the second network card to the first network card, and then forwards the message to the virtual machine or physical machine through the first network card, thereby solving the problem caused by the business network and The virtual machine or physical machine cannot realize the automatic configuration of the IP address caused by the isolation of the management network. The DHCP proxy node only monitors the DHCP message, and discards other messages, so as not to affect the isolation of the service network and the virtual network.

Further, in order to avoid interference with the DHCP request inside the management network, the listening port of the DHCP proxy node can be adjusted to ports 67 and 68 specified by the non-native DHCP protocol. In Fig. 1, the DHCP proxy node deployed on the host where the virtual machine is located is exemplarily drawn. Further, since the physical machine also has the first network card and the second network card, the DHCP proxy node can also be deployed on the physical machine. This is not limited.

Optionally, the technical solutions provided in this application can be applied to the OpenStack cloud platform, wherein OpenStack is a free open source software cloud computing platform. OpenStack network services are standard services, usually involving the deployment of several programs on multiple network nodes. The main program of the OpenStack network service is the so-called Neutron server. The Neutron server is a Python background program that provides the OpenStack network application programming interface (application programming interface, API) to the tenant of the network service, and passes the tenant request to a series of The plugin handles it.

Neutron servers (formerly known as Quantum) run on processor nodes to serve the networking API and its extensions. The Neutron server can also be used to implement the network model as well as the IP addressing of each port. A Neutron server usually includes at least one Neutron plugin. Typically Neutron plugins run on compute nodes to manage and configure local virtual switches.

Optionally, in this embodiment, the function of the network management node may be implemented by a Neutron server in the OpenStack cloud platform, or may also be implemented by other computer programs, which is not limited in this embodiment.

The DHCP protocol is used to assign IP addresses and some TCP/IP configuration information or network configuration parameters to network devices. DHCP adopts the client/server communication mode. The client submits a configuration request to the server, and the server returns the corresponding configuration information such as the IP address assigned by the client to realize the dynamic configuration of the IP address and other information. DHCP improves safe, reliable and simple TCP/IP network settings, avoids address conflicts in TCP/IP networks, and greatly reduces the burden of managing IP address settings.

Wherein, in each embodiment of the present application, the client includes a virtual machine or a physical machine in the service area, which is not limited in the present application.

In order to realize that the service node automatically assigns an IP address to a virtual machine or a physical machine when the service network and the management network are isolated, this embodiment provides a DHCP packet processing method, which is applied to a data center, and the data The center includes at least one computing device, each computing device includes a processor and a memory, and the at least one computing device is used to run a DHCP agent node, a DHCP service node and a virtual machine,

Wherein, the DHCP agent node is deployed on a virtual machine or a physical machine in the service area, and the host where the virtual machine is located includes two network cards, a first network card and a second network card, and the first network card is used to access the service network to realize service Network message sending and receiving; the second network card is used to access the management network to realize the management network message sending and receiving, and the DHCP proxy node is used to monitor the processes of the first network card and the second network card.

With reference to Figure 2, the method comprises the following steps:

Step 201: the DHCP agent node receives a request from the service network, and the request is used to indicate the allocation of an IP address for a virtual machine or a physical machine;

Specifically, the DHCP proxy node receives the request from the virtual machine or the physical machine through the first network card, where the first network card is used to access the service network.

Wherein, the request includes a DHCP Discover broadcast message.

Step 202: the DHCP proxy node sends the request to the DHCP service node, and obtains an IP address from the DHCP service node in the management network according to the request;

Specifically, the DHCP proxy node sends the request to the DHCP service node through the second network card, and the DHCP proxy node receives the IP address assigned by the DHCP service node according to the request through the second network card, so The second network card is used to access the management network.

The DHCP service node and the DHCP proxy node have established a communication connection before obtaining the request.

Step 203: the DHCP proxy node sends the IP address to the virtual machine or physical machine.

Specifically, the DHCP proxy node sends the IP address to the virtual machine or the physical machine through the first network card.

Wherein, the first network card is located on the host where the second network card is located, and the DHCP proxy node is deployed on the host where the second network card is located.

Optionally, the IP address may be sent to the virtual machine in a manner carried in a DHCP Offer message.

In this embodiment, the DHCP proxy node accesses the service network through the first network card, obtains the request sent by the virtual machine from the service network, and then forwards the request to the DHCP service node through the management network, wherein the DHCP proxy node passes the first The second network card is connected to the management network to realize the forwarding of request messages from the service network to the management network.

Similarly, after the DHCP service node receives the request forwarded from the DHCP proxy node, it allocates an IP address and sends it to the DHCP proxy node through the management network, and after the DHCP proxy node receives the IP address through the second network card, it assigns the IP address The IP address is converted to the service network, and the IP address is forwarded to the virtual machine or the physical machine through the first network card, thereby realizing the forwarding of the IP address from the management network to the service network.

In the method provided by this embodiment, a DHCP agent node is deployed in the data center, and the DHCP agent node has the function of freely forwarding messages or messages between the service network and the management network, such as realizing the message sending and receiving of the service network through the first network card , through the second network card to realize the message sending and receiving of the management network, thereby solving the problem that the virtual machine or the physical machine cannot realize the automatic configuration of the IP address due to the isolation of the business network and the management network in the cloud platform.

The method realizes the automatic configuration of the IP address, saves the management cost, avoids the manual configuration of the IP address by the administrator, and improves the binding efficiency of the IP address.

In addition, the physical machine or virtual machine in the service area can not only obtain the IP address from the DHCP service node (DHCP Server), but also obtain the subnet mask, default gateway address, DNS server address and other information. The above process is called DHCP lease process. Because when the virtual machine or physical machine receives the provided IP address, the DHCP service node will lease the IP address to the virtual machine or physical machine for a specified period of time.

Further, the DHCP lease process can be roughly divided into four steps, as shown in FIG. 3 : the virtual machine or physical machine requests an IP address—the server responds—the virtual machine or physical machine selects an IP address—the server determines the lease .

Based on the DHCP lease process shown in FIG. 3 , a DHCP packet processing method provided in this embodiment is introduced in detail. The method can be applied to the data center shown in FIG. 1 .

The data center includes: a network management node deployed in an operation and maintenance management area, at least one DHCP service node, a DHCP proxy node, and a virtual machine or a physical machine.

Specifically, as shown in Figure 4, the method includes the following steps:

Step 1: A user (administrator or tenant) creates a network, and the network management node receives a network creation request from the user.

Step 2: The network management node creates/starts a DHCP service node in the operation and maintenance management area for the newly created network. The DHCP service node can serve the automatic allocation of IP addresses of the network, such as providing IP addresses for the requested VM/PM .

Step 3: The network management node obtains the IP address information of the newly created DHCP service node.

Step 4: The network management node creates a DHCP proxy node for the PM/VM in the newly created network.

Specifically, if the service area does not have a DHCP proxy node, the network management node creates a DHCP proxy node on a host where a physical machine in the service area or a virtual machine in the service area is located. The DHCP proxy node can also be deployed on multiple hosts in the service area in the form of active/standby or cluster, which is not limited in this embodiment.

Step 5: the network management node configures the DHCP service node, and sends information such as the IP address and the port of the newly created DHCP service node to the newly created DHCP proxy node in step 4 or the original node in the service area, so that the DHCP The proxy node establishes a communication connection with the IP address assigned by the DHCP service node.

Optionally, the method also includes:

Step 6: After the DHCP agent node receives the IP address of the DHCP service node, it establishes a communication connection with the DHCP service node, and tests its connectivity with the DHCP service node. Send error alarm information so that operation and maintenance personnel can intervene to diagnose the fault point.

In this embodiment, use the data center to select the DHCP service node and the DHCP agent node serving for the virtual machine or the physical machine, and establish the communication connection between the DHCP service node and the DHCP agent node through the IP address of the DHCP service node, so that the DHCP agent After the node obtains the request from the VM/PM, it can automatically forward the request to the DHCP service node and receive the IP address fed back by the DHCP service node, thereby automatically establishing the connection relationship between the DHCP service node and the VM/PM , so as to realize the automatic allocation of IP addresses, and avoid modifying the content of the message and filling the IP address of the DHCP service node corresponding to the DHCP agent section.

Step 7: The DHCP agent node starts the DHCP broadcast monitoring on the service network to monitor the request messages broadcast by all clients within its range, such as virtual machines or physical machines.

Step 8: When the user issues a virtual machine or a physical machine, or the IP address of the virtual machine or the physical machine needs to be refreshed, it needs to obtain and bind an IP address, that is, broadcast a DHCP Discover request message to the network.

Specifically, a virtual machine or a physical machine broadcasts a DHCP Discover packet in the data center to request an IP address, and this process is also called DHCP Discover. Optionally, the source IP address of the DHCP Discover packet is 0.0.0.0; the destination IP address is 255.255.255.255, and the DHCP Discover packet can also include the MAC address and computer name of a virtual machine or a physical machine, so that the DHCP service node It can be determined which virtual machine or physical machine sent the request packet.

Step 9: After receiving the DHCP Discover request message, the DHCP proxy node copies the message for forwarding, converts the message from the service network to the management network, and does not modify the content of the message or fill in the DHCP relay field.

Step 10: The DHCP proxy node sends the copied DHCP Discover request message to the DHCP service node through the management network.

Optionally, the DHCP proxy node sends the request message to the DHCP service node in unicast form through the management network.

Step 11: The DHCP service node receives the DHCP Discover request message sent from the DHCP agent node, and then processes the request message, specifically, selects a suitable IP address resource pool according to the information contained in the DHCP Discover request message. The IP address is fed back to the DHCP proxy node in the form of a DHCP response message, such as a DHCP Offer message.

Specifically, when the DHCP service node receives the information that the client requests an IP address, it searches in its own IP address library whether there is a legal IP address provided to the client, and if so, the DHCP service node uses this IP address as mark, and then unicast sends a DHCP Offer packet to the DHCP agent node (this process is also called DHCP Offer).

Step 12: After receiving the DHCP response message (such as a DHCP Offer message) from the DHCP service node through the service network, the DHCP proxy node transfers the message from the management network to the service network.

Step 13: The DHCP proxy node sends the DHCP Offer message to the physical machine or the virtual machine through the service network.

Step 14: the physical machine or virtual machine extracts the IP address from the DHCP Offer message, and sends a DHCP response message (such as a DHCP Requst message) to the DHCP proxy node when confirming that the IP address is not occupied; if If the IP address is occupied, it is necessary to return to step 8 to restart sending the DHCP request message.

Specifically, the physical machine or the virtual machine selects an IP address from the received first DHCP Offer message, and generates a DHCP response message, where the DHCP response message indicates that the IP address in the DHCP response message is available. Optionally, the DHCP response message is a DHCP Request message, and this process is also called a DHCP Request.

Step 15: The DHCP proxy node receives the DHCP Request message from the physical machine or virtual machine through the service network, copies the message for forwarding, and does not modify the content of the message or fill in the DHCP relay field.

Step 16: The DHCP proxy node sends the DHCP Request message to the DHCP service node through the management network.

Step 17: The DHCP service node receives the DHCP Request message from the DHCP proxy node, and sends a DHCP ACK message to the DHCP proxy node through the management network.

Specifically, the last step in the DHCP lease process is to confirm the IP lease for the server, also known as DHCP ACK. After the DHCP service node receives the DHCP Request, it will feed back to the physical machine or virtual machine in the form of a DHCP ACK (DHCP Acknowledge) message, indicating successful confirmation. The DHCP ACK message contains the effective lease of the IP address and other possible configuration information. When the physical machine or virtual machine receives the DHCP ACK, it configures the IP address and completes the initialization of TCP/IP, so that it can communicate on the TCP/IP network.

In addition, if the physical machine or virtual machine accepts the IP address allocated by the DHCP service node and sends a DHCPRequest message, the DHCP service node that allocates the IP address will mark and reserve the IP address so that the IP address can no longer be provided to Used by other DHCP clients.

Step 18: The DHCP proxy node receives the DHCP ACK message from the DHCP service node through the management network, and transfers the DHCP ACK message to the service network after processing.

Step 19: The DHCP proxy node sends the DHCP ACK message to the client through the service network.

Step 20: After receiving the DHCP ACK message, the physical machine or the virtual machine binds the requested IP address.

The process ends.

Referring to FIG. 5 , it is a schematic structural diagram of a DHCP proxy node forwarding a DHCP message provided by this embodiment.

It should be noted that the DHCP Discover broadcast message, DHCP Offer message, DHCPRequest message and DHCP ACK message described in this embodiment are all messages in the DHCP protocol, and all have clear definitions, specifically , the function of each message in the DHCP protocol is defined as follows:

DHCP Discover packet/package: When the DHCP client (client) needs to obtain an IP address, it broadcasts this type of packet to the local network.

DHCP Offer message/package: The DHCP service node (server) replies to the DHCPDiscover message sent by the DHCP client, and the DHCP Offer package contains some configuration parameters that the DHCP service node will provide to the client, such as an IP address.

DHCP Request message/packet: the package sent by the DHCP client to the DHCP server under the following circumstances:

(a) The client requests the configuration information provided in the DHCP Offer sent by a specific service node, and at the same time implicitly rejects the DHCP Offer packets from all other servers.

(b) The client confirms the correctness of the configuration information assigned to itself at certain times, such as after the operating system of the client is restarted or after a short-term physical failure of the line.

(c) The client renews the lease of the explicit IP address it has acquired.

DHCP ACK message: The DHCP service node replies to the DHCP Request packet or DHCPInform packet sent by the DHCP client, which contains the configuration information assigned to the client by the DHCP service node.

In the technical solution provided by this application, a DHCP agent node is deployed on the host, so that the DHCP agent node can forward the DHCP broadcast obtained from the service network to the DHCP service node through the management network, so as to solve the problem of isolation between the service network and the management network As a result, the virtual machine or physical machine cannot realize the automatic configuration of the IP address.

In addition, this method uses the DHCP service node to realize the centralized allocation of the IP address requested by the virtual machine, so that the cloud computing platform or virtualization platform meets the requirements of the current data center and the requirements of centralized operation and maintenance management, so that the network management node can manage The entire data center avoids deploying a management platform in each business area, which saves management costs and improves lease efficiency, and the automatic configuration of IP addresses also enables platform administrators to avoid the pressure of manual operations.

Referring to FIG. 6 , it is a schematic structural diagram of a DHCP proxy node of the present application, and the DHCP proxy node is deployed on a server or a computing node or a computing device, and is used to execute the DHCP message processing method corresponding to FIG. 2 or FIG. 4 .

As shown in FIG. 6 , the DHCP proxy node includes: a receiving module 601 , a processing module 602 and a sending module 603 . In addition, the DHCP proxy node may also include other functional modules or components, such as a storage module.

Wherein, the receiving module 601 is configured to receive a request from a service network, and the request is a DHCP Discover broadcast message.

The processing module 602 is configured to convert the request from the service network to the management network.

The sending module 603 is configured to send the request to the DHCP service node in unicast form.

The receiving module 601 is further configured to obtain an IP address from a DHCP service node in the management network according to the request, and the request is used to indicate to assign an IP address to a virtual machine or a physical machine. Wherein, the IP address may be obtained through a DHCP Offer message.

A sending module 603, configured to send the IP address to the virtual machine or the physical machine.

Optionally, in a specific implementation manner of this embodiment, the receiving module 601 is specifically configured to receive the request from a virtual machine or a physical machine through a first network card, and the first network card is used to receive into the business network.

Optionally, in another specific implementation manner of this embodiment, the receiving module 601 is specifically configured to receive, through a second network card, the IP address assigned by the DHCP service node according to the request, the The second network card is used to access the management network.

Wherein, the first network card is located on the host where the second network card is located, and the DHCP proxy node is deployed on the host where the second network card is located.

Optionally, in a specific implementation of this embodiment, the processing module 602 is specifically configured to transfer the DHCP Offer message from the management network to the service network; the sending module 603 is specifically configured to pass the first network card Send the DHCPOffer message to the virtual machine or physical machine.

Optionally, in a specific implementation of this embodiment, the receiving module 601 is also configured to obtain a DHCP Request message from the virtual machine or the physical machine through the service network, and the DHCP Request message indicates that the DHCP Offer The IP address in the message is available; the processing module 602 is also used to transfer the DHCP Request message from the service network to the management network; the sending module 603 is also used to transfer the DHCP Request message through the second network card The message is sent to the DHCP service node.

Optionally, in yet another specific implementation of this embodiment, the receiving module 601 is also configured to receive the DHCP ACK message from the DHCP service node through the management network; the processing module 602 is also configured to Transfer the DHCPACK message from the management network to the service network; the sending module 603 is further configured to send the DHCPACK message to the virtual machine or physical machine through the first network card, so that the virtual machine The machine or the physical machine binds the IP address after obtaining the DHCP ACK message.

Optionally, in yet another specific implementation of this embodiment, the receiving module 601 is also used to obtain the IP address of the DHCP service node before obtaining the request message; the processing module 602 is also used to Establish a connection with the DHCP service node according to the IP address, and test connectivity with the DHCP service node.

In addition, the embodiment of the present application also provides a network management node, such as the Neutron component deployed in the OpenStack cloud computing platform, the structure of the network management node may be the same as that of the DHCP agent node shown in Figure 6, for example, including: a receiving module , processing module and sending module, etc.

The receiving module is used to obtain a network creation request from a virtual machine or a physical machine; the processing module is used to create a DHCP service node for the virtual machine or the physical machine, and determine a DHCP agent for the virtual machine or the physical machine node, wherein the DHCP service node is used to provide an IP address, and the DHCP proxy node is used to send the IP address to the virtual machine or physical machine through a management network.

Optionally, the sending module is further configured to send the IP address corresponding to the DHCP service node to a DHCP proxy node, so that the DHCP proxy node uses the IP address of the DHCP service node to establish a communication connection with it.

In addition, the embodiment of the present application also provides a DHCP service node, which is used to implement automatic allocation of IP addresses.

Optionally, the structure of the DHCP service node may be the same as that of the DHCP agent node shown in FIG. 6 , for example, including: a receiving module, a processing module, and a sending module.

Specifically, the receiving module is used to receive the DHCP request from the DHCP agent node; the processing module is used to determine the IP address of the virtual machine or the physical machine according to the DHCP request, and the sending module is used to send the IP address to the DHCP server through the management network agent node.

Optionally, in yet another specific implementation manner of this embodiment, the receiving module is further configured to receive a DHCP Request message from a DHCP agent node, and the DHCP Request message indicates that the DHCP service node allocates The IP address is available; the processing module is also used to generate an ACK message and send the ACK message to the DHCP proxy node through the sending module.

It should be noted that the DHCP proxy node described in each embodiment of the present application can also be called a DHCP relay agent, a DHCP forwarding agent, a DHCP relay, or a DHCP forwarding node, etc., and can also be other proxy modules for implementing physical Messaging between the onboard business network and the management network.

FIG. 7 is a schematic structural diagram of a computing device provided by an embodiment of the present application. The computing device includes: a network interface 701 , a processor 702 and a memory 703 . The processor 702 executes the code in the memory 703, and implements the DHCP proxy node shown in FIG. 6 through the network interface 701, including the communication transmission between the DHCP proxy node and a DHCP server, a virtual machine or a physical machine.

Further, the processor 702 may be composed of an integrated circuit (integrated circuit, IC), for example, may be composed of a single packaged IC, or may be composed of multiple packaged ICs connected with the same function or different functions. For example, the processor may only include a CPU, or may be a combination of a GPU, a digital signal processor (DSP), and a control chip (such as a baseband chip) in the transceiver module. In various implementation manners of the present application, the CPU may be a single computing core, or may include multiple computing cores.

The memory 703 may include a volatile memory (volatile memory), such as a random access memory (random access memory, RAM); it may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory) , a hard disk drive (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD); the storage may also include a combination of the above types of storage.

At the specific implementation level, the present application also provides a data center, the data center includes at least one computing device or host, each computing device or host includes a processor and a memory, and the at least one computing device or host is used to The DHCP agent node, the DHCP service node and the virtual machine are run to implement the method for processing the DHCP packet described in the foregoing embodiments.

Specifically, the DHCP agent node is used to receive a request from a service network, obtain an IP address from a DHCP service node in the management network according to the request, and send the IP address to a virtual machine or a physical machine, wherein the request uses Instructing to assign an IP address to the virtual machine or physical machine.

Optionally, in a specific implementation manner of this embodiment, the processor is specifically configured to control the DHCP proxy node to receive the request from the virtual machine through a first network card, and the first network card Used to access the service network.

Optionally, in yet another specific implementation manner of this embodiment, the processor is specifically configured to control the DHCP proxy node to receive the IP address allocated by the DHCP service node according to the request through the second network card. address, the second network card is used to access the management network.

Wherein, the first network card is located on the host where the second network card is located, and the DHCP proxy node is deployed on the host where the second network card is located.

In a specific implementation, the present application also provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in each embodiment of the DHCP message processing method provided by the present application when executed. . The storage medium can be a magnetic disk, an optical disk, a ROM or a RAM, and the like.

Wherein, all functions of the DHCP agent node, the DHCP service node, and the virtual machine can be realized by computer programs.

In addition, in this embodiment, a computer program product is also provided, and the computer program product includes one or more computer instructions, such as forwarding instructions and the like. When the computer loads and executes the computer program, all or part of the processes or functions according to the above-mentioned embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.

Specifically, when the computer executes the computer program, the following functions can be realized:

The DHCP agent node receives a request from the service network, and the request is used to indicate that an IP address is assigned to the virtual machine; obtains the IP address from the DHCP service node in the management network according to the request; and sends the virtual machine or the physical machine the IP address.

In addition, the specific implementation includes that the DHCP agent node receives the request from the virtual machine or the physical machine through the first network card, and the first network card is used to access the service network; and the DHCP agent The node receives the IP address assigned by the DHCP service node according to the request through a second network card, where the second network card is used to access the management network.

The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, such as from a network device, computer, server, or data center Wired or wireless transmission to another device, computer or server.

The present application also provides a terminal, such as a user equipment, a physical machine or a virtual machine, which is used to implement method steps such as sending a DHCP request message and sending a DHCP request message and an ACK message in the foregoing embodiments.

Specifically, the terminal may include a control node, a processor, and a memory, and the control node may include components such as a receiver, a transmitter, and an antenna. The terminal may also include more or fewer components, or combine certain components, or arrange different components, which is not limited in this application.

Wherein, the control node is used to broadcast a DHCP request message, such as a DHCP Discover broadcast message, which is used to request an IP address from a server;

The control node is also configured to receive a DHCP response message from a DHCP agent node, the DHCP response message may be a DHCP Offer message, and the DHCP Offer message carries an IP address; the processor is used to Extract the IP address from the DHCP response message, and send a DHCP response message to the DHCP agent node through the control node when the IP address is confirmed to be unoccupied; wherein, the DHCP response message may be DHCP Request message.

Optionally, if the IP address is occupied, the terminal needs to resend a DHCPDiscover broadcast message to the DHCP proxy node, so as to re-request for obtaining a new IP address.

Optionally, in a specific implementation of this embodiment, the control node is further configured to receive the DHCP ACK sent from the DHCP agent node, the DHCP ACK is the DHCP service node according to the DHCP Request report This file is generated and sent to mark that the IP address assigned to the client can no longer be used by other devices.

The processor is further configured to bind the IP address after receiving the DHCP ACK message.

In addition, program instructions are stored in the memory, and when the program instructions are executed, the above-mentioned client or terminal can realize the sending and receiving of the respective DHCP messages, and the binding of the obtained IP address and other method processes. Further, the memory may include a volatile memory, such as RAM; it may also include a non-volatile memory, such as flashmemory, hard disk HDD or SSD; the memory may also include a combination of the above types of memory.

The processor may be a CPU, or a combination of CPU and NP. The processor may further include hardware chips. The aforementioned hardware chip may be an ASIC, a programmable logic device (programmable logic device, PLD) or a combination thereof. The aforementioned PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a generic array logic (generic array logic, GAL) or any combination thereof.

Those skilled in the art can clearly understand that the technologies in the embodiments of the present invention can be implemented by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the essence of the technical solutions in the embodiments of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM , magnetic disk, optical disk, etc., including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.

For the same and similar parts among the various embodiments in this specification, refer to each other. In particular, for the embodiments of the above-mentioned apparatus and hardware equipment, because they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to the description in the method embodiments.

The embodiments of the present invention described above are not intended to limit the protection scope of the present invention.

Claims (10)

1. a kind of dynamic host configuration protocol DHCP message processing method, which is characterized in that the method includes:

DHCP proxy node is received from business network and is asked, and the request is used to indicate for virtual machine or physical machine distribution IP Location；

The DHCP proxy node obtains IP address according to the request in managing network from DHCP service node；

The DHCP proxy node sends the IP address to the virtual machine or physical machine.

2. according to the method described in claim 1, it is characterized in that, the DHCP proxy node receives request bag from business network It includes：

The DHCP proxy node by the first network interface card receive the request from the virtual machine or physical machine, described first Network interface card is for accessing the business network.

3. method according to claim 1 or 2, which is characterized in that DHCP proxy node basis in managing network The request obtains IP address from DHCP service node, including：

The DHCP proxy node receives the IP of the DHCP service node according to the request distribution by the second network interface card Address, second network interface card is for accessing the management network.

4. according to the method described in claim 3, it is characterized in that, first network interface card is located at the master where second network interface card On machine, the DHCP proxy node deployment is in the host where second network interface card.

5. a kind of DHCP proxy node, which is characterized in that including receiving module and sending module, wherein

The receiving module is asked for being received from business network, and is taken from DHCP according to the request in managing network Business node obtains IP address, and the request is used to indicate distributes IP address for virtual machine or physical machine；

The sending module, for sending the IP address to the virtual machine or physical machine.

6. agent node according to claim 5, which is characterized in that

The receiving module is specifically used for receiving the request from the virtual machine or physical machine, institute by the first network interface card The first network interface card is stated for accessing the business network.

7. agent node according to claim 5 or 6, which is characterized in that

The receiving module, specifically for receiving institute of the DHCP service node according to the request distribution by the second network interface card IP address is stated, second network interface card is for accessing the management network.

8. agent node according to claim 7, which is characterized in that

First network interface card is located on the host where second network interface card, and the DHCP proxy node deployment is in second net Host where blocking.

9. a kind of computing device, which is characterized in that the computing device includes processor and memory, and the processor executes institute The computer instruction of memory storage is stated to realize that dynamic host configuration protocol DHCP agent node, the DHCP proxy node are used 1 to 4 any one of them method is required in perform claim.

10. a kind of data center, which is characterized in that dynamic host configuration protocol DHCP agent node, DHCP service node and void Quasi- machine is deployed in respectively on one or more computing devices of the data center, and the DHCP proxy node is used for perform claim It is required that 1 to 4 any one of them method.