CN103401954B - The implementation method of virtual DHCP - Google Patents

The implementation method of virtual DHCP Download PDF

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Publication number
CN103401954B
CN103401954B CN201310334143.1A CN201310334143A CN103401954B CN 103401954 B CN103401954 B CN 103401954B CN 201310334143 A CN201310334143 A CN 201310334143A CN 103401954 B CN103401954 B CN 103401954B
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address
dhcp
virtual
request message
virtual machine
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CN103401954A (en
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张群轼
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Opzoon Technology Co Ltd
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Opzoon Technology Co Ltd
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Abstract

The invention discloses the implementation method of a kind of virtual DHCP, including: after the control node in virtual network receives virtual DHCP foundation request message, set up virtual DHCP configuration information, and set up two tuples list of MAC Address and IP address;Controlling node and two tuples list and virtual DHCP configuration information are sent at least one agent node, agent node sets up DHCP service;Virtual machine sends MAC Address allocation request message to controlling node, controls node and selects untapped two tuples from two tuples list, and MAC Address therein is distributed to virtual machine;Virtual machine sends IP address assignment request message, after agent node receives this message, finds out the IP address corresponding with the MAC Address of virtual machine and distribute to virtual machine from two tuples list.The method can realize virtual DHCP in virtual network, and distributes MAC Address and IP address for virtual machine.

Description

The implementation method of virtual DHCP
Technical field
The present invention relates to virtual networking field, particularly to the implementation method of a kind of virtual DHCP.
Background technology
Virtual network be a kind of comprising be at least partly the computer network of virtual network link.Virtual network link be Two are calculated equipment room and are not comprised physical connection, but realized by network virtualization, and the connection between i.e. two nodes is also Need not the physical link of point-to-point needed for legacy network is built, but the logical links that framework is on the network platform.Base Virtual network in virtual unit usually contains large number of virtual machine.Virtual machine (Virtual Machine, VM) refers to pass through Software simulation there is complete hardware system function, the complete computer that operates in a completely isolated environment.Logical Crossing software virtual machine, just can simulate one or more virtual computer on a physical host, these virtual machines are complete Entirely it is operated just as real computer, such as, operating system, set up applications, access Internet resources can be installed Etc..The same with physical host, virtual machine communicates in virtual network and needs also exist for a unique IP address.Virtual machine IP address can be defined by user oneself, it is also possible to by DHCP come to virtual machine distribute.
For the network of multiple node dynamic access, the side that use DHCP carry out IP address distribution is usually taken Formula.DHCP(Dynamic Host Configuration Protocol, DynamicHost arranges agreement) it is that one makes network management Member can manage the communication protocol with automatic IP address allocation concentratedly.In an ip network, the equipment of each connection Internet Need to distribute unique IP address.DHCP enables network manager from central node monitoring and distribution IP address.When certain meter When calculation machine moves on to other position in network, can automatically receive new IP address.
Along with developing rapidly of cloud computing technology, virtual networking is also developing rapidly and increasingly mature.For virtual In network, virtual machine is large number of, the feature of node dynamic access, network virtualization, the mode of traditional DHCP distribution IP address Cannot adapt to the demand of virtual network, therefore, it is necessary to work out the IP address distribution side being more suitable for for virtual network Formula.
Summary of the invention
(1) technical problem to be solved
It is an object of the invention to provide the implementation method of a kind of virtual DHCP such that it is able to utilize in virtual network DHCP service is that virtual machine distributes IP address.
(2) technical scheme
In order to solve above-mentioned technical problem, the present invention proposes the implementation method of a kind of virtual DHCP, and described method includes:
After control node in S1, virtual network receives virtual DHCP foundation request message, set up virtual DHCP configuration Information, and set up two tuples list of MAC Address and IP address, described two tuples list be used for preserving available MAC Address with can One-to-one relationship with IP address;
Described two tuples list and described virtual DHCP configuration information are sent to described virtual by S2, described control node At least one agent node in network, described agent node sets up DHCP service according to described virtual DHCP configuration information;
S3, when a certain virtual machine add described virtual network time, described virtual machine to described control node send MAC Address Allocation request message, described control node selects untapped two tuples from described two tuples list, and by therein MAC Address distributes to described virtual machine;
S4, described virtual machine pass through broadcast transmission IP address assignment request message, and described agent node receives described IP After address assignment request message, from described two tuples list, find out the IP ground corresponding with the MAC Address of described virtual machine Location also assigns them to described virtual machine.
Optionally, described virtual DHCP sets up and asks message to include IP available address.
Optionally, step S1 specifically includes:
Described control node sets up the IP available address in request message according to described virtual DHCP, for each IP available The available MAC Address that address creation one is corresponding, and it is saved in described two tuples list.
Optionally, described virtual DHCP sets up and asks message to include gateway ip address and dns address.
Optionally, step S1 specifically includes:
Described control node sets up the gateway ip address in request message and dns address according to described virtual DHCP, sets up Described virtual DHCP configuration information.
Optionally, in step S4, described virtual machine is specifically included by broadcast transmission IP address assignment request message:
Described virtual machine sends described IP address assignment request by the way of sending DHCP DISCOVER broadcast packet and disappears Breath.
Optionally, farther include after step S4:
S5, when described control nodal test to described agent node communicating interrupt, by described two tuples list and institute Stating other agent nodes that virtual DHCP configuration information is sent in described virtual network, other agent nodes are according to described virtual DHCP configuration information sets up DHCP service.
Optionally, step S5 farther includes:
Described control node and described agent node carry out a heart-beat test every Fixed Time Interval, if described control Node does not receives the heartbeat packet that described agent node sends after exceeding prefixed time interval, then be judged to that described agent node leads to News are interrupted.
Optionally, described Fixed Time Interval is 15 seconds.
Optionally, step S1 farther includes:
Described control node sets up data base, and described two tuples list and described virtual DHCP configuration information is preserved To described data base.
(3) beneficial effect
The technical scheme that the present invention proposes can be based on controlling node and the collaborative work of agent node in virtual network Realize virtual DHCP, and be that each virtual machine distributes unique MAC Address and IP address by DHCP service.Use virtual DHCP distributes IP address can be greatly improved work efficiency, saves the cost that management is safeguarded.
Accompanying drawing explanation
Fig. 1 is the flowchart of one embodiment of the invention.
Fig. 2 is the schematic diagram setting up DHCP service A in the embodiment of the present invention 1.
Fig. 3 is the schematic diagram of newly-built agent node in the embodiment of the present invention 1.
Fig. 4 is the schematic diagram setting up multiple virtual DHCP in one embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is described in further detail.
The present invention proposes the implementation method of a kind of virtual DHCP, as it is shown in figure 1, described method includes:
After control node in S1, virtual network receives virtual DHCP foundation request message, set up virtual DHCP configuration Information, and set up two tuples list of MAC Address and IP address, described two tuples list be used for preserving available MAC Address with can One-to-one relationship with IP address;
Described two tuples list and described virtual DHCP configuration information are sent to described virtual by S2, described control node At least one agent node in network, described agent node sets up DHCP service according to described virtual DHCP configuration information;
S3, when a certain virtual machine add described virtual network time, described virtual machine to described control node send MAC Address Allocation request message, described control node selects untapped two tuples from described two tuples list, and by therein MAC Address distributes to described virtual machine;
S4, described virtual machine pass through broadcast transmission IP address assignment request message, and described agent node receives described IP After address assignment request message, from described two tuples list, find out the IP ground corresponding with the MAC Address of described virtual machine Location also assigns them to described virtual machine.
The technical scheme that the present invention proposes can be based on controlling node and the collaborative work of agent node in virtual network Realize virtual DHCP, and be that each virtual machine distributes unique MAC Address and IP address by DHCP service.Use virtual DHCP distributes IP address can be greatly improved work efficiency, saves the cost that management is safeguarded.
Below by a specific embodiment, the preferred implementation of described method is illustrated.
Embodiment 1:
First user needs to set up a virtual network in systems, then give this virtual network set up one virtual DHCP.As in figure 2 it is shown, the virtual network in the present embodiment includes host A, host B and host C, wherein, host A is that this is virtual Network-based control node, host B and host C are agent node.
User is when setting up virtual DHCP, it is necessary first to send virtual DHCP foundation request message, at this to controlling node In request message, user can provide the title of virtual DHCP, the scope of IP available address, gateway ip address and the IP of DNS The information such as address.Then this request can be sent to control node.In the present embodiment, user asks the virtual DHCP's of foundation Title is designated as A.Control node, after receiving virtual DHCP foundation request message, can be set up according to this virtual DHCP and ask in message IP available address, for the available MAC Address that each IP available address creation one is corresponding, and be saved in two tuples list In (MAC, IP), (MAC, IP) here is two tuple result sets, for preserving available MAC Address and IP available address One-to-one relationship;Meanwhile, control node and set up the title of virtual DHCP in request message, gateway IP according to this virtual DHCP Address and dns address, set up virtual DHCP configuration information.It addition, as in figure 2 it is shown, control node can also set up data base, and Described two tuples list (MAC, IP) and described virtual DHCP configuration information are saved in described data base, follow-up to facilitate Search.
When control node send set up the order of virtual DHCP to agent node time, described two tuples list (MAC, IP) with And described virtual DHCP configuration information can transmit over together.As in figure 2 it is shown, the agent node on host B and host C is receiving After the order of control node, the DHCP service process of response can be set up, i.e. the agent node on host B and host C all can be created Build DHCP service A, and be the virtual machine distribution IP address in this virtual network jointly.
When a certain newly-built virtual machine needs to add this virtual network, this newly-built virtual machine first can be to controlling joint Point sends MAC Address allocation request message;After control node receives request, from (MAC, IP), select one untapped two Tuple, and MAC Address therein is distributed to this newly-built virtual machine;Then this newly-built virtual machine this MAC ground The Microsoft Loopback Adapter of oneself is set up in location.
When, after the virtual machine activation that this is newly-built, dhcp broadcast being sent and carry out IP address requesting;At this moment establish before DHCP service A can receive this request bag, owing to having included the right of this MAC in the configuration file of DHCP service A before Answer IP, so this most designated good IP will distribute to newly-built virtual machine.Here virtual machine obtains the process of IP address Identical with traditional DHCP service, it may be assumed that virtual machine sends IP address by the way of sending DHCP DISCOVER broadcast packet and distributes Request message;Agent node on host B or host C is after receiving this IP address assignment request message, from two tuples list (MAC, IP) finds out the IP address corresponding with the MAC Address of this virtual machine, and sends it to virtual machine, i.e. to void A DHCP OFFER message replied by plan machine;After virtual machine receives IP address, send a DHCP REQUEST to network wide Broadcast bag;Last agent node replys a DHCP ACK message to virtual machine, and so far, the IP address of virtual machine is assigned.
In order to ensure network reliability service, controlling node needs to confirm that each provides the agent node of DHCP service can one Directly keep normal communication.Therefore, control to carry out one every Fixed Time Interval (such as 15 seconds) between node and agent node Secondary heart-beat test;When a main frame is closed or netting twine is pulled out, control node it finds that cannot with on it Agent node carry out communication, at this moment control node and can select another main frame in this virtual network, and take from data base Go out described two tuples list and described virtual DHCP configuration information, then send virtual DHCP and set up order to another main frame On agent node, another main frame re-establishes DHCP service, to ensure the high availability of DHCP service.
As it is shown on figure 3, originally set up by the agent node on host B and provide DHCP service A.Control node and host B On agent node carry out a heart-beat test every Fixed Time Interval.At a time, node is controlled when exceeding default Between do not receive the heartbeat packet that agent node on host B sends behind interval, then judge in the agent node communication on host B Disconnected.Therefore, control node from this virtual network, have selected main frame D, from data base, take out (MAC, IP) and DHCP service A Configuration information, and be sent to the agent node on main frame D;Then the agent node on main frame D sets up DHCP service A, and is Virtual machine distribution IP address in this virtual network.Above-mentioned mechanism ensure that always certain amount of agency in virtual network Node provides IP address allocation services, thus ensures the high reliability of network.
It should be noted that in the case of there is multiple virtual network in systems, the agent node on a certain main frame was both The virtual DHCP of virtual network A can be set up, the virtual DHCP of virtual network B can also be set up simultaneously.As shown in Figure 4, system Two virtual networks of middle existence;One of them virtual network needs to set up DHCP service A, and another virtual network needs to set up DHCP service B;Then, host B and host C are set up the most simultaneously there are DHCP service A and DHCP service B.Due to virtual network it Between be mutually isolated, therefore, for the newly-built virtual machine in one of them virtual network, its IP address assignment request is only Can be received by the DHCP service corresponding to this virtual network.
To sum up, the technical scheme that the present invention proposes can be based on controlling the collaborative of node and agent node in virtual network Work realizes virtual DHCP, and is that each virtual machine distributes unique MAC Address and IP address by DHCP service.Use void Plan DHCP distributes IP address can be greatly improved work efficiency, saves the cost that management is safeguarded.
The above is only the preferred embodiment of the present invention, it is noted that come for those of ordinary skill in the art Saying, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and replacement, these improve and replace also should It is considered as protection scope of the present invention.

Claims (8)

1. the implementation method of a virtual DHCP, it is characterised in that described method includes:
After control node in S1, virtual network receives virtual DHCP foundation request message, set up virtual DHCP configuration information, And set up two tuples list of MAC Address and IP address, described two tuples list are used for preserving available MAC Address and IP available ground The one-to-one relationship of location;
Described two tuples list and described virtual DHCP configuration information are sent to described virtual network by S2, described control node In at least one agent node, described agent node sets up DHCP service according to described virtual DHCP configuration information;
S3, when a certain virtual machine add described virtual network time, described virtual machine to described control node send MAC Address distribution Request message, described control node selects untapped two tuples from described two tuples list, and by MAC therein ground Described virtual machine is distributed in location;
S4, described virtual machine pass through broadcast transmission IP address assignment request message, and described agent node receives described IP address After allocation request message, from described two tuples list, find out the IP address corresponding with the MAC Address of described virtual machine also Assign them to described virtual machine;
Described virtual DHCP sets up request message and includes IP available address;
Step S1 specifically includes:
Described control node sets up the IP available address in request message according to described virtual DHCP, for each IP available address Create a corresponding available MAC Address, and be saved in described two tuples list.
2. the method for claim 1, it is characterised in that described virtual DHCP sets up request message and includes gateway ip address And dns address.
3. method as claimed in claim 2, it is characterised in that step S1 specifically includes:
Described control node sets up the gateway ip address in request message and dns address according to described virtual DHCP, sets up described Virtual DHCP configuration information.
4. the method for claim 1, it is characterised in that in step S4, described virtual machine passes through broadcast transmission IP address Allocation request message specifically includes:
Described virtual machine sends described IP address assignment request message by the way of sending DHCP DISCOVER broadcast packet.
5. the method for claim 1, it is characterised in that farther include after step S4:
S5, when described control nodal test to described agent node communicating interrupt, by described two tuples list and described void Intending other agent nodes that DHCP configuration information is sent in described virtual network, other agent nodes are according to described virtual DHCP Configuration information sets up DHCP service.
6. method as claimed in claim 5, it is characterised in that step S5 farther includes:
Described control node and described agent node carry out a heart-beat test every Fixed Time Interval, if described control node After exceeding prefixed time interval, do not receive the heartbeat packet that described agent node sends, be then judged in described agent node communication Disconnected.
7. method as claimed in claim 6, it is characterised in that described Fixed Time Interval is 15 seconds.
8. the method for claim 1, it is characterised in that step S1 farther includes:
Described control node sets up data base, and described two tuples list and described virtual DHCP configuration information are saved in institute State data base.
CN201310334143.1A 2013-08-02 2013-08-02 The implementation method of virtual DHCP Expired - Fee Related CN103401954B (en)

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CN106375486B (en) * 2016-11-24 2019-05-21 国云科技股份有限公司 A kind of system of cloud platform software definition DHCP service
CN107707689B (en) * 2017-10-31 2020-09-22 迈普通信技术股份有限公司 DHCP message processing method, DHCP server and gateway equipment
US10536431B2 (en) * 2018-04-30 2020-01-14 Microsoft Technology Licensing On-node DHCP implementation for virtual machines

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