CN102315968A - Network configuration method in virtual machine environment - Google Patents

Abstract

The present invention provides a network configuration method in a virtualized environment, comprising the following steps: starting a virtual machine, and sending a broadcast message to the network; the server of the physical machine analyzes the broadcast message, and judges whether the broadcast message comes from its corresponding virtual machine; If the broadcast message is from its corresponding virtual machine, the server of the physical machine responds to the broadcast message; the server of the physical machine queries the network resource pool, performs network resource allocation according to the preset strategy, and returns the allocation result; if the allocation result shows If the resource allocation is successful, the server of the physical machine generates network configuration parameters according to the allocation result; the server of the physical machine sends the network configuration parameters to the virtual machine in the form of a broadcast message; the virtual machine configures the network according to the network configuration parameters; the service of the physical machine The terminal updates the state information of the network resource pool. The invention can efficiently configure the virtual machine network, reduce network overhead, and has good transparency and scalability.

Description

Network configuration method in virtual machine environment

technical field

The present invention relates to the technical field of virtual machines, and more specifically, the present invention relates to a network configuration method in a virtual machine environment.

Background technique

Dynamic Host Configuration Protocol (DHCP for short) is widely used to manage physical local area networks. However, if the DHCP service is applied rigidly to the virtualization environment without considering the network characteristics of the virtual machine, it will cause disadvantages such as low server efficiency and heavy network load, which will cause a lot of inconvenience to the network management of multiple virtual machines, and will not be It meets the requirements of multi-virtual machines for efficient, dynamic and transparent management of resources.

Contents of the invention

In view of this, the purpose of the present invention is to provide a network configuration method in a virtual machine environment to realize the initialization and dynamic automatic configuration of multi-virtual machine networks. The method can efficiently configure virtual machine networks, reduce network overhead, and also has Good transparency and scalability.

A network configuration method in a virtualized environment, comprising the following steps:

The virtual machine starts and sends a broadcast message to the network;

The server of the physical machine parses the broadcast message and judges whether the broadcast message comes from its corresponding virtual machine;

If the broadcast message is from its corresponding virtual machine, the server of the physical machine responds to the broadcast message;

The server of the physical machine queries the network resource pool, performs network resource allocation according to the preset strategy, and returns the allocation result;

If the allocation result shows that the resource allocation is successful, the server of the physical machine generates network configuration parameters according to the allocation result;

The server of the physical machine sends the network configuration parameters to the virtual machine in the form of a broadcast message;

The virtual machine configures the network according to the network configuration parameters;

The server of the physical machine updates the state information of the network resource pool.

The method of the present invention further includes: discarding the broadcast message if the broadcast message is not from its corresponding virtual machine.

The method of the present invention further includes: if the allocation result shows that the resource allocation is unsuccessful, returning the information of no available network resources.

The broadcast message includes an instruction identification bit field for indicating whether the broadcast information is from a virtual machine or a physical machine, a media access control field for indicating virtual hardware information of the virtual machine, a universally unique identifier field for identifying the virtual machine, and Network configuration information field used to save network configuration parameters.

The server of the physical machine queries the network resource pool, performs network resource allocation according to a preset strategy, and returns the allocation result. The steps further include:

Read the network settings of the server of the physical machine to obtain the network segment information of the physical machine;

The server of the physical machine sends the network segment information to the network resource pool to query the free IP within the range of the network segment in the network segment information, and returns the query result;

If the query result is empty, count the number of used IPs in each network segment in the network resource pool to determine the network segment with the most used IPs and free IPs, and return the network segment information;

The server of the physical machine sends the network segment information to the network resource pool to query the free IP within the range of the network segment in the network segment information, and returns the query result;

If the query result is empty, it will return no available network resource information.

The server of the physical machine queries the network resource pool, executes the network resource allocation according to the preset strategy, and returns the allocation result. The step further includes: if the query result is not empty, take out the IP information from the query result and use it as the allocation result return.

Compared with the prior art, the present invention has the following advantages:

(1) High efficiency: the present invention adopts an optimized network communication structure, simplifies the processing process of network configuration, effectively reduces the time of virtual machine network initialization and on-demand configuration process, and improves the efficiency of virtual machine network configuration.

(2) Low overhead: the virtual machine network basic communication model of the present invention uses a simplified data communication format, which avoids the transmission of a large amount of redundant data, thereby reducing network resource overhead.

(3) Transparency: The present invention dynamically maintains the network resource pool based on the on-demand network resource allocation strategy, provides virtual machine automatic network initialization and configuration, and the virtual machine user does not need to manually configure the network, and the whole process is transparent to the user .

(4) Scalability: the present invention manages the virtual machine network running on each physical server through the physical network end, realizes local configuration management of the virtual machine network, and enhances the scalability of the virtual machine network configuration system.

Description of drawings

Fig. 1 is a flow chart of the network configuration method in the virtualization environment of the present invention.

FIG. 2 is a schematic diagram of a format of a broadcast message between a server of a virtual machine and a physical machine.

Fig. 3 is a detailed flowchart of step (4) of the present invention.

FIG. 4 is a schematic diagram of system functions of the network configuration method in the virtualization environment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the network configuration method of the present invention comprises the following steps:

(1) The virtual machine starts and sends a broadcast message to the network;

(2) The server of the physical machine parses the broadcast message, and judges whether the broadcast message is from its corresponding virtual machine; if the broadcast message is from its corresponding virtual machine, then proceed to step (3), otherwise discard the broadcast message;

(3) The server of the physical machine responds to the broadcast message;

(4) The server of the physical machine queries the network resource pool, performs network resource allocation according to the preset strategy, and returns the allocation result;

(5) If the allocation result shows that the resource allocation is successful, then proceed to step (6); if the allocation result shows that the resource allocation is unsuccessful, then return the information that there is no available network resource;

(6) The server of the physical machine generates network configuration parameters according to the distribution result;

(7) The server of the physical machine sends the network configuration parameters to the virtual machine in the form of a broadcast message;

(8) The virtual machine configures the network according to the network configuration parameters;

(9) The server of the physical machine updates the status information of the network resource pool.

Referring to Figure 2, the broadcast information exchanged between the server of the virtual machine and the physical machine includes the following fields:

1. Instruction identification bit (2 bits):

The first two digits of the header are the instruction identification code, and the server of the virtual machine and the physical machine judges the nature and function of the message through the value of the identification code. If the value of the identification code is "is", it means that the data is broadcast information sent by the virtual machine network to the network during the initialization phase; if the value of the identification code is "rt", it means that the data is sent by the server of the physical machine Confirmation information for the virtual machine; if the value of the identification code is "st", it indicates that this is a network configuration parameter sent to the virtual machine by the server of the physical machine.

2. Media Access Control (MAC) address (17 digits):

It indicates the network MAC address of the virtual machine, which is filled in during the virtual machine startup phase. The Mac field is a unique field during initialization. The virtual hardware information of the virtual machine is filled in the field. The MAC field in other types of messages will be cleared, and the Universally Unique Identifier (UUID) field will be used as the unique Identifier.

3. UUID (36 bits):

The global code generated when each virtual machine is created can uniquely identify the virtual machine.

4. Network configuration information (no positioning number):

It is used to save the network configuration parameters assigned to the virtual machine, including IP address, gateway, Domain Name System (Domain Name System, DNS for short) and other data.

In step (1), when the virtual machine is started, the instruction identification bit field of the broadcast message will be set to "is", and the MAC address of the machine will be queried, filled in the MAC field, and then the broadcast message will be sent to the network sent in. After the message is sent, if the client does not receive the message returned by the server within the set time, it will automatically enter the timeout state and resend the network configuration request after a certain interval. If the request is unsuccessful within the specified number of times, An error message is returned.

In step (2), the server of the physical machine first judges whether the instruction flag of the broadcast message is "is", if so, reads the following MAC address, compares and queries the list of virtual machines running on the machine, and if it finds a command flag with For a virtual machine that matches the MAC address, take out the UUID registered by the virtual machine as the request receipt confirmation information, set the instruction flag to "rt", reply to the virtual machine, and apply for network resources from the network resource pool at the same time.

In step (4), the network resource allocation adopts the strategy of combining physical machine priority allocation and local area network maximum allocation, and its specific operation process is shown in Figure 3, including the following sub-steps:

(41) read the network settings of the service end of the physical machine to obtain the network segment information of the physical machine;

(42) The service end of the physical machine sends the network segment information to the network resource pool to query the free IP within the network segment range in the network segment information, and returns the query result;

(43) If the query result is empty, count the number of used IPs in each network segment in the network resource pool to determine the network segment with the most used IPs and idle IPs, and return the network segment information, then enter step (44), if the query result is not empty, then take out the IP information from the query result, and return it as the distribution result;

(44) The server of the physical machine sends the network segment information to the network resource pool to query the idle IP within the range of the network segment in the network segment information, and returns the query result. If the query result is not empty, take it out from the query result IP information, which will be returned as the allocation result. If the query result is empty, no available network resource information will be returned.

The physical machine priority allocation strategy automatically allocates the virtual machine to the same network segment as the host physical machine, so that the physical machine and the client virtual machine form an intranet structure of the LAN, which can reduce the routing addressing caused by communication in different network segments and improve Communication efficiency between virtual machine and physical machine. When the IP resource of the network segment where the physical machine is located is insufficient, the virtual machine is allocated to the LAN segment with the largest number of existing virtual machines according to the maximum allocation policy of the LAN, so as to ensure that the newly added virtual machine can be connected with the largest number of existing network virtual machines for efficient network communication.

In step (6), the server of the physical machine fills the UUID of the virtual machine requesting resources into the UUID field of the broadcast message, and generates an available network based on the IP information allocated by the network resource pool and the corresponding gateway and DNS resources. Resource package, fill in the network configuration information field of the broadcast message.

In step (7), the server of the physical machine sets the instruction identification bit of the generated broadcast message to "st", and then sends the broadcast message to the network in a broadcast manner.

In step (8), when the virtual machine listens to the message whose command identification bit is "st", it checks whether the content of its UUID field is consistent with its own UUID, if so, reads the network configuration parameters, and sets them according to the specified data Your own virtual network; if it is different, discard the data packet and continue to monitor.

In step (9), after receiving the message that the virtual machine is configured successfully, the network resource pool sets the network resource of the virtual machine to the used state, and updates the number of IPs used in the corresponding network segment.

example

Taking an IBM high-performance cluster to build a virtual machine network automatic configuration system as an example, the IBM high-performance computing cluster includes 1 front-end machine, 2 I/O nodes and 39 computing nodes. The specific configuration is shown in Table 1. The internal LAN of the cluster is 1000M Ethernet, and the external LAN is 100M Ethernet. For specific test environment configuration information, please refer to the following table 1:

Table 1 Test environment configuration information

During the specific implementation of the method, a relatively independent two-layer structure is adopted to construct a virtual machine automatic network configuration system. The network communication layer is the core of the entire system, responsible for building and managing the specific tasks of the entire virtual network; the logic control layer is the control and data center of the entire system, responsible for the normal operation of the control flow, the correct storage of data, and the effective handling of system errors.

As shown in Figure 4, the network resource pool and logical console belong to the logical control layer and run on the front-end machine of the cluster. The logic console is responsible for the distribution and management of control information, and exchanges data with the network resource pool as needed, so as to realize the normal operation of the control flow and the correct storage of network data. The physical network end and the virtual network end belong to the network communication layer. They run on cluster computing nodes and virtual machines respectively. The effective information exchange between them determines the normal communication of the virtual machine network.

After a virtual machine is started, it needs to configure the network. It sends a network resource request to the physical machine through the internal basic communication module. After receiving the request, the logical console applies the resource allocation strategy to take it out of the network resource pool. The corresponding data is sent to the virtual network end in the virtual machine through the physical network end of the physical machine for corresponding configuration. If the configuration is successful, the console will update the data in the network resource pool to ensure the consistency of real-time data; if it is unsuccessful, it will automatically repeat all the operations of network initialization after a certain period of time. Network initialization for the virtual machine failed. This completes a simple network configuration communication.

Start a virtual machine V on cluster computing node No. 8, and start configuring the network after it is started. The virtual network terminal generates a communication message as shown in Table 2, sets the instruction flag to "is", fills in the network Mac address of the virtual machine V, and leaves other fields empty, and sends it through the broadcast port.

Instruction flag Mac address UUID Network configuration information is 00:16:3e:00:00:11 (null) (null)

Table 2 Broadcast messages sent by virtual machines

The physical network end of the No. 8 cluster computing node receives the broadcast message through the listening port. After judging that the instruction flag is "is", read the MAC address, query in the virtual machine list of the local machine, find the matching MAC address, and read The UUID of this virtual machine. Then generate a communication message for application confirmation, as shown in Table 2, and send it to the network by broadcasting. At the same time, remotely call the GetResource function of the logical console of the front-end node of the cluster.

Table 3 Request confirmation information sent by the physical machine

After the network side of virtual machine V receives the broadcast message sent by computing node 8 from the listening port, it judges the confirmation information replied by the physical network side through the instruction identification bit, checks that the MAC address is the MAC address of virtual machine V, and reads the UUID field , which is recorded as the UUID of the virtual machine V.

The logical console executes the resource allocation program. First query the source of the news, that is, the IP of computing node No. 8, intercept the network segment as "192.168.100.0", query the network resource pool, and select an available IP "192.168.100.102" from the free IP result set of this network segment. Then, obtain relevant network resources according to this IP, including gateway, DNS, etc., generate a network configuration parameter package, and return it to cluster computing node No. 8.

After obtaining the returned network parameters, the physical network end generates a broadcast message, as shown in Table 4. The instruction identification bit of the broadcast message is set to "st", the MAC address field is cleared, the UUID field is filled with the UUID of the target virtual machine V, and the network configuration parameters are filled in the network configuration information field of the broadcast message. This broadcast message is also sent in broadcast mode.

Table 4 Broadcast information sent by the physical machine

After the network side of virtual machine V receives the broadcast message from the listening port, it first determines that it is a network configuration message according to the command identification bit, then checks the UUID and finds that it is consistent with its own UUID, so it reads the following network configuration information field and parses out Configure parameters such as IP address and make network settings. After the network setting is completed, the network configuration success message is sent to computing node No. 8.

After receiving the successful configuration message returned by virtual machine V, computing node No. 8 calls the SetIPPool function of the logical console to change the status of the IP address "192.168.100.102" in the resource pool database to "used".

So far, the automatic network configuration of the virtual machine V is completed.

Claims (6)

1. the network collocating method under the virtualized environment may further comprise the steps:

Virtual machine activation sends broadcast to network;

The service end of physical machine is resolved said broadcast, and judges that whether said broadcast is from its corresponding virtual machine;

If said broadcast is that then the service end of said physical machine responds said broadcast from its corresponding virtual machine;

The service end requester network resource pool of said physical machine is carried out Resource Allocation in Networks according to predetermined strategy, and is returned allocation result;

If said allocation result shows the resource allocation success, then the service end of said physical machine generates network configuration parameters according to said allocation result;

The service end of said physical machine sends to said virtual machine with said network configuration parameters with the mode of broadcast;

Said virtual machine is according to said network configuration parameters configuration network;

The service end of said physical machine is upgraded the state information in said Internet resources pond.

2. network collocating method according to claim 1 is characterized in that, if said broadcast is not from its corresponding virtual machine, then abandons said broadcast.

3. network collocating method according to claim 1 is characterized in that, and is unsuccessful if said allocation result shows resource allocation, then returns no available network resource information.

4. method according to claim 1 is characterized in that: said broadcast comprise be used to indicate said broadcast message be from said virtual machine or from the command identification bit field of said physical machine, be used to indicate the virtual hardware information of said virtual machine the media interviews control field, be used to identify the general unique identifier field of said virtual machine and the network configuration information field that is used to preserve said network configuration parameters.

5. method according to claim 1 is characterized in that: the service end requester network resource pool of said physical machine carry out Resource Allocation in Networks according to predetermined strategy, and the step of returning allocation result comprises:

Read the network settings of the service end of said physical machine, to obtain the network segment information of said physical machine;

The service end of said physical machine mails to said Internet resources pond with said network segment information, inquiring about the idle IP in the network segment scope in the said network segment information, and returns Query Result;

If said Query Result be empty, the quantity of the IP that then in said Internet resources pond, has been used in each network segment of statistics confirming the having maximum IP that have been used and the network segment that idle IP is arranged, and is returned network segment information;

The service end of said physical machine mails to said Internet resources pond with said network segment information, inquiring about the idle IP in the network segment scope in the said network segment information, and returns Query Result;

If said Query Result is empty, then return no available network resource information.

6. method according to claim 5; It is characterized in that; The service end requester network resource pool of said physical machine is carried out Resource Allocation in Networks according to predetermined strategy, and the step of returning allocation result further comprises: if said Query Result is for empty; Then from said Query Result, take out IP information, it is returned as allocation result.

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