WO2017011938A1

WO2017011938A1 - Virtual network function capacity expansion method and apparatus

Info

Publication number: WO2017011938A1
Application number: PCT/CN2015/084315
Authority: WO
Inventors: 李飞; 唐朋成
Original assignee: 华为技术有限公司
Priority date: 2015-07-17
Filing date: 2015-07-17
Publication date: 2017-01-26
Also published as: CN106664259B; CN106664259A

Abstract

The present invention provides a virtual network function capacity expansion method and apparatus. The method comprises: determining VM infrastructure resources needed during operation of a VNF according to a resource load of a VM executing a service in the VNF and VM infrastructure resource information in a first VDU in a virtual network function descriptor (VNFD) file, wherein the first VDU is a current VDU corresponding to the VNF; determining a second VDU maximally matching the VM infrastructure resources needed during operation of the VNF from all VDUs of the VNFD file according to the VM infrastructure resource information in each VDU in the VNFD file and the VM infrastructure resources needed during operation of the VNF; and expanding the capacity of the VNF according to the second VDU. The VNF capacity expansion method and apparatus provided by the present embodiment can reduce waste of VM infrastructure resources during capacity expansion of a VNF.

Description

Method and device for expanding virtual network function

Technical field

The embodiments of the present invention relate to a network function virtualization technology, and in particular, to a method and an apparatus for expanding a virtual network function.

Background technique

Network Functions Virtualization (NFV) refers to software processing technology that utilizes common hardware and virtualization technologies to carry multiple functions. In the NFV technology framework, an NFV service network can be decomposed into a set of virtual network functions (VNFs) and virtual network function links (VNFLs), where VNFs are virtual functions with network functions. The entity is, for example, a VNF with the Mobile Management Entity (MME) function, which is a virtual MME. A VNF can be decomposed into a set of virtual network function components (VNFCs), which are carried on the corresponding virtual machines (VMs).

During the VNFC instantiation process (where VNFC is deployed on the VM and run on the VM, it is called VNFC instance, which is the process of instantiating VNFC), and the VM's infrastructure resources, operating system and other information are virtualized. The Virtualization Deployment Unit (VDU) is defined, wherein the infrastructure resources of the VM may specifically include resources such as a central processing unit (CPU), a memory, and a network. The VNF is sensitive to the change of the traffic. When the traffic of the VNF service changes, the VNFC instance needs to be expanded in time to ensure the service quality. In the prior art, each VNF service corresponds to a fixed VDU, and the infrastructure resource allocation of the VM in the VDU is manually determined in advance. When the traffic of the VNF service changes, the VDU corresponding to the VNF service needs to be used. The VNFC instance is expanded to meet business requirements.

However, when the VNF service is changed and the VDU corresponding to the VNF service needs to be used to expand the VNFC instance, the infrastructure resource allocation amount of the VM specified in the VDU is much larger than the VNF resource usage during the actual operation of the service. , thereby causing VM infrastructure resources The waste of the source.

Summary of the invention

The embodiments of the present invention provide a method and an apparatus for expanding a virtual network function, which can not only meet the resource requirements of the VNF service, but also not waste the infrastructure resources of the VM.

In a first aspect, the embodiment of the present invention provides a method for expanding a virtual network function VNF, including:

Determining, according to a resource load of a VM performing the service in the VNF and VM infrastructure resource information in the first VDU in the virtual network descriptor VNFD file, the VM infrastructure resource required by the VNF runtime; a VDU is a VDU currently corresponding to the VNF;

Determining a VM required for the VNF runtime from all VDUs of the VNFD file according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime a second VDU with the greatest matching of infrastructure resources;

The VNF is expanded according to the second VDU.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the expanding the VNF according to the second VDU includes:

Determining whether a matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required by the VNF runtime is greater than or equal to a preset threshold;

If yes, expanding the VNF according to the second VDU;

If not, the VNF corresponding to the VNF in the VNFD file is expanded according to the VNFD file, and a new VDU is created in the VNFD file by the VNFD manager.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the performing, according to the VM infrastructure resource information in each VDU in the VNFD file, The second VDU that has the largest matching degree with the VM infrastructure resources required by the VNF running, among the VDUs of the VNFD file, includes:

Obtaining a first vector according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in the first VDU;

Obtaining a second vector according to VM infrastructure resource information in each VDU in the VNFD file;

Obtaining a degree of matching between the first vector and each of the second vectors;

The VDU corresponding to the second vector with the largest degree of matching is used as the second VDU.

With the first possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the creating, by the VNFD manager, a new VDU in the VNFD file includes:

Sending a VDU creation request to the network function virtualization orchestrator NFVO; wherein the VDU creation request carries VM infrastructure resource information required by the VNF runtime, for requesting the NFVO to determine that a new VDU needs to be created, The NFVO instructs the VNFD manager to create the new VDU in the VNFD file based on VM infrastructure resource information required by the VNF runtime.

With the third possible implementation of the first aspect, in a fourth possible implementation manner of the foregoing aspect, the performing, by the second VDU, the VNF is expanded, specifically:

Sending a capacity expansion request to the NFVO according to the second VDU, where the capacity expansion request includes the number of VMs required for capacity expansion and infrastructure resource information of the VM required for capacity expansion;

Receiving the expansion command sent by the NFVO; wherein the expansion instruction carries the resource information allocated by the NFVO according to the expansion request for the expansion of the VNF;

Create and start the VM required for capacity expansion according to the expansion command.

In a second aspect, the embodiment of the present invention provides an apparatus for expanding a virtual network function VNF, including:

a determining module, configured to determine, according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in a first VDU in a virtual network descriptor VNFD file, a VM infrastructure resource required by the VNF runtime; The first VDU is a VDU currently corresponding to the VNF;

a matching module, configured to determine, according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime, from all VDUs of the VNFD file to run with the VNF The second VDU with the largest matching degree of VM infrastructure resources required;

And a capacity expansion module, configured to expand the VNF according to the second VDU.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the expansion module is specifically configured to determine a VM infrastructure resource in the second VDU and a VM infrastructure resource required by the VNF runtime Whether the matching degree is greater than or equal to the preset threshold; if yes, the expansion module expands the VNF according to the second VDU; if not, the expansion module When the VNFD file is initialized, the VDU corresponding to the VNF in the VNFD file expands the VNF, and a new VDU is created in the VNFD file by the VNFD manager.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the matching module is specifically configured to perform, according to a resource load and a location of a VM that performs a service in the VNF Obtaining a first vector of VM infrastructure resource information in the first VDU; acquiring a second vector according to VM infrastructure resource information in each VDU in the VNFD file; acquiring the first vector and each of the second The degree of matching between the vectors; the VDU corresponding to the second vector having the largest matching degree is taken as the second VDU.

In conjunction with the first possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the expansion module is further configured to send a VDU creation request to the network function virtualization orchestrator NFVO; wherein the VDU Creating a request to carry VM infrastructure resource information required by the VNF runtime for requesting the NFVO to determine, after determining that a new VDU needs to be created, the NFVO indicating that the VNFD manager is required to operate according to the VNF The VM infrastructure resource information creates the new VDU in the VNFD file.

With the third possible implementation of the second aspect, in a fourth possible implementation manner of the second aspect, the expansion module is further configured to send a expansion request to the NFVO according to the second VDU; The expansion request includes the number of VMs required for the capacity expansion and the infrastructure resource information of the VMs required for the expansion; the expansion module is further configured to receive the expansion command sent by the NFVO, and create and start the expansion according to the expansion instruction. The VM is configured to carry the resource information allocated by the NFVO according to the expansion request for the expansion of the VNF.

The VNF expansion method and apparatus provided by this embodiment determine the VM infrastructure resources required for the VNF operation according to the resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU in the VNFD file, and According to the VM infrastructure resource information in each VDU in the VNFD file and the VM infrastructure resources required by the VNF runtime, the matching degree of the VM infrastructure resources required by the VNF runtime is determined from among all the VDUs of the VNFD file. In the second VDU, the VNF is expanded according to the second VDU. In this embodiment, the VDUs configured for the VNF service are not used for capacity expansion, and the VM infrastructure resources required for the VNF operation are selected from all the VDUs. The most matching second VDU is expanded, so the configured amount of infrastructure resources of the VM in the second VDU and the amount of VM infrastructure resources required for the VNF runtime The most similar, the expansion of the VNF according to the second VDU can not only meet the resource requirements of the VNF service, but also not waste the infrastructure resources of the VM.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

FIG. 1 is a schematic diagram of an application scenario of a method for expanding a VNF according to an embodiment of the present disclosure;

2 is a flowchart of a method for expanding a VNF according to Embodiment 1 of the present invention;

3 is a flowchart of a method for expanding a VNF according to Embodiment 2 of the present invention;

4 is a flowchart of a method for expanding a VNF according to Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for expanding a VNF according to Embodiment 4 of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a device for expanding a VNF according to Embodiment 7 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic diagram of an application scenario of a method for expanding a VNF according to an embodiment of the present invention. As shown in FIG. 1 , the scenario is implemented on a cloud platform, where the scenario includes multiple VM1, monitor 2, Virtual Network Function Descriptor (VNFD) manager 3, and network function virtualization orchestrator (Network). Functions Virtualization Orchestrator (NFVO) 4, Virtual Infrastructure Manager (VIM) 5 and Virtual Network Function Manager (VNFM). The monitor 2 is responsible for monitoring and collecting the resource load and service load of each VM constituting the VNF. The VNFD manager 3 is used to create and manage VNFD files, the VNFD file includes VUD, and the NFVO4 is responsible for managing virtual infrastructure resources through VIM5. Resource scheduling function, VIM5 is responsible for calculation Management and control of virtual infrastructure resources such as resources, storage resources, and network resources. VNFM6 is responsible for lifecycle management of VNF instances.

The method according to the embodiment of the present invention is to solve the problem that when the VNF service is used to expand the VNFC instance when the VNF service is used to expand the VNF service, the technology of the VM is wasted. problem.

The technical solutions of the present invention will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

FIG. 2 is a flowchart of a method for expanding a VNF according to Embodiment 1 of the present invention. The execution body of this embodiment is a VNFM. As shown in FIG. 2, the method includes the following steps:

Step 101: Determine, according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in the first VDU in the VNFD file, a VM infrastructure resource required for the VNF runtime.

The first VDU is a VDU currently corresponding to the VNF.

In this embodiment, the VNFM can obtain the resource load of the VM that performs the service in the VNF through the monitor, and the resource load of the VM may specifically include indicators related to the computing resource, the storage resource, the network resource, and the like in the basic setting resource of the VM, for example, , Central Processing Unit (CPU) utilization, memory utilization, bandwidth utilization, disk utilization, and so on. The VNFM can also obtain the Key Performance Indicator (KPI) of the VM executing the service in the VNF through the monitor, and obtain the resource load of the VM executing the service in the VNF from the KPI, where the KPI includes the VM executing the service in the VNF. The resource load and the traffic load of each VM executing the service in the VNF. The service load includes indicators related to the VNF service, for example, the number of users, the number of sessions, and the number of Packet Data Protocol (PDP) contexts in the current system. , database read and write queue length, access delay, and so on. The value of each indicator in the KPI may be an instantaneous value, or may be an average value, a maximum value, a minimum value, an intermediate value, and the like in a certain time window.

In this embodiment, the VNFD file includes configuration information describing the VNF deployment and management behavior, and the configuration information used to support the VNF to go online and manage the VNF instance life cycle, and also includes other specific instance information and constraint information of the VNF runtime. The VDU involved in this implementation is also included in the VNFD file and is an important part of the VNFD file. VNFM from the VNFD file Obtaining a first VDU, where the first VDU is a VDU currently being used by the VNF service, where the first VDU includes VM infrastructure resource information and operating system information allocated for the VNF service, and the VM infrastructure resource information allocated for the VNF service is specific. A set of parameters of the infrastructure resources of the VM executing the service in the VNF, such as CPU, memory, bandwidth, hard disk, and the like. Based on the resource load of the VM performing the service in the VNF and the VM infrastructure resource information allocated for the VNF service in the first VDU, the amount of resources of the VM actually used when the VNF service is run may be calculated.

Step 102: Determine, according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime, from all VDUs of the VNFD file, determine matching with VM infrastructure resources required by the VNF runtime. The second largest VDU.

In this embodiment, the VNFM obtains the VM infrastructure resource information in each VDU in the VNFD file, and calculates the matching degree between the VM infrastructure resources required by the VNF runtime and the VM infrastructure resources in each VDU, and The VDU corresponding to the VM infrastructure resource with the highest matching degree is selected as the second VDU.

Step 103: Expand the VNF according to the second VDU.

In this embodiment, after the second VDU is determined, the VNFM expands the VNF according to the second VDU. The specific capacity expansion process may use the VNF expansion method in the prior art, and details are not described herein again.

In the prior art, when the VNF service is changed, the VDU corresponding to the VNF service is used to expand the VNFC instance, and the resource allocation amount of the VM specified in the VDU is greater than the VNF resource when the service is actually running. The usage amount, for example, the memory size specified in the VDU corresponding to the VNF service is 10G, and when the VNF service is actually executed, when other resources are fully utilized, the 6G memory has satisfied the demand, and the remaining 4G memory is idle. , thereby causing waste of the infrastructure resources of the VM. In this embodiment, the VNFM determines the VM infrastructure resources required for the VNF operation according to the resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU in the VNFD file, and according to each of the VNFD files. The VM infrastructure resource information in the VDU and the VM infrastructure resources required by the VNF runtime determine the second VDU with the greatest matching degree with the VM infrastructure resources required by the VNF runtime from all VDUs of the VNFD file, according to the The VDU is expanded by the VDU. In this embodiment, the VDUs configured for the VNF service are not used for capacity expansion. Instead, the VDUs that match the VM infrastructure resources required for the VNF operation are selected from all the VDUs. , therefore, the first The configuration of the infrastructure resources of the VMs in the two VDUs is the most similar to the VM infrastructure resources required by the VNF. Therefore, the VNF is expanded according to the second VDU, which not only satisfies the resource requirements of the VNF service, but also does not A waste of infrastructure resources for the VM.

In the VNF expansion method provided by this embodiment, the VNFM determines the VM infrastructure resource required for the VNF operation according to the resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU in the VNFD file, and according to The VM infrastructure resource information in each VDU in the VNFD file and the VM infrastructure resources required by the VNF runtime determine the most matching degree of the VM infrastructure resources required by the VNF runtime from all VDUs of the VNFD file. In the second VDU, the VNF is expanded according to the second VDU. In this embodiment, the VDUs configured for the VNF service are not used for capacity expansion, and the VM infrastructure resources required for the VNF operation are selected from all the VDUs. The matching second VDU is expanded. Therefore, the configuration amount of the infrastructure resources of the VM in the second VDU is the most similar to the VM infrastructure resource required for the VNF operation. Therefore, the VNF is expanded according to the second VDU. It can meet the resource requirements of the VNF service and will not waste the VM's infrastructure resources.

FIG. 3 is a flowchart of a method for expanding a VNF according to Embodiment 2 of the present invention. The execution body of this embodiment is a VNFM. As shown in FIG. 3, the method includes the following steps:

Step 201: Determine, according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in the first VDU in the VNFD file, a VM infrastructure resource required for the VNF runtime.

The first VDU is a VDU currently corresponding to the VNF.

In this embodiment, "determining the second VDU with the greatest matching degree with the VM infrastructure resources required by the VNF runtime from all VDUs of the VNFD file according to the VM infrastructure resource information in each VDU in the VNFD file" The specific implementation method of this step includes steps 202 to 205.

Step 202: Acquire a first vector according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in the first VDU.

In this embodiment, the first vector is a vector corresponding to the VM infrastructure resource required for the VNF operation, and the VNFM obtains the first vector according to the resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU. Representing the first vector as R=(R ₁ , R ₂ , . . . , R _i , . . . , R _n ), where R _i represents the usage amount of the infrastructure resource of the VM, for example, R ₁ represents the CPU of the VM. The amount of use, R ₂ represents the amount of memory used by the VM, and the like.

Step 203: Acquire a second vector according to VM infrastructure resource information in each VDU in the VNFD file.

In this embodiment, the second vector is a vector corresponding to the VM infrastructure resource in each VDU, and the second vector is represented as T=(T ₁ , T ₂ , . . . , T _i , . . . , T _n ), where T _i represents the usage amount of the infrastructure resource of the VM in the VDU. For example, T ₁ represents the configured amount of the CPU of the VM, and T ₂ represents the configured amount of the memory of the VM.

It should be noted that the order of the elements in the second vector must be consistent with the first vector. For example, R ₁ represents the usage of the CPU of the VM, and T ₁ must represent the configuration amount of the CPU of the VM; R ₂ represents the memory of the VM. The amount of usage, T ₂ must represent the amount of memory configured by the VM.

Step 204: Acquire a matching degree between the first vector and each second vector.

In this embodiment, the degree of matching between R and T vectors can be calculated and recorded by a similarity algorithm to obtain a matching degree, which is usually between 0 and 1. One common measure of similarity is cosine similarity, and other similar similarity measures can be used, which are not limited in the present invention.

Step 205: The VDU corresponding to the second vector with the largest matching degree is used as the second VDU.

In this embodiment, after obtaining the matching degree between all the second vectors and the first vector, the VDU corresponding to the second vector with the largest matching degree is used as the second VDU.

In this embodiment, the specific implementation method of the step of “expanding the VNF according to the second VDU” includes steps 206 to 208.

Step 206: Determine whether the matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required by the VNF is greater than or equal to a preset threshold; if yes, execute step 207; if not, perform the step 208.

In this embodiment, if the matching degree is greater than or equal to 0 and less than or equal to 1, a preset threshold may be preset to compare the matching between the VM infrastructure resources in the second VDU and the VM infrastructure resources required by the VNF runtime. And the size of the preset threshold, in order to ensure that the VM infrastructure resources in the second VDU match the VM infrastructure resources required for the VNF running, the preset threshold is usually not less than 0.8. Specifically, The preset threshold may be equal to 0.85, 0.9, etc., and a person skilled in the art may set a preset threshold according to actual needs.

Step 207: Expand the VNF according to the second VDU.

In this embodiment, when the matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required for the VNF operation is greater than or equal to a preset threshold, the VNF is expanded according to the second VDU.

Step 208: According to the VNFD file initialization, the VNF corresponding to the VNF in the VNFD file expands the VNF, and creates a new VDU in the VNFD file through the VNFD manager.

In this implementation, when the matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required by the VNF running is less than a preset threshold, the VNFM corresponds to the VNF in the VNFD file according to the VNFD file initialization. The VDU expands the VNF and creates a new VDU in the VNFD file through the VNFD Manager. Because there is a waiting time for establishing a new VDU, the VNF service may be delayed. Therefore, when the VNFD file is initialized, the corresponding VDU is configured for each VNF service. When the VNF service is expanded for the first time, or from all the When a VDU that matches the VM infrastructure resources required for the VNF runtime is not found in the VDU, the VDU configured during the initialization is used to expand the VNF. Therefore, the delay of the VNF service caused by the establishment of a new VDU is avoided, and the service quality of the VNF service is guaranteed. And, if the matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required by the VNF is less than a preset threshold, the VNF set for the VNF is used to expand the VNF during the VNFD file initialization process. At the same time, VNFM can also create a new VDU in the VNFD file through the VNFD Manager based on the VM infrastructure resources required by the VNF runtime.

Optionally, in this embodiment, creating a new VDU in the VNFD file by using the VNFD manager includes: sending a VDU creation request to the NFVO; wherein the VDU creation request carries the VM infrastructure resource information required by the VNF runtime. After requesting NFVO to determine that a new VDU needs to be created, the NFVO instructs the VNFD Manager to create a new VDU in the VNFD file based on the VM infrastructure resource information required by the VNF runtime.

In this embodiment, when a new VDU needs to be created, the VNFM sends a VDU creation request to the NFVO, and the NFVO determines whether it is necessary to establish a new VDU according to the VM infrastructure resource information required by the VNF runtime carried in the VDU creation request. If it is determined that a new VDU needs to be created, the NFVO instructs the VNFD manager to create a new VDU in the VNFD file according to the VM infrastructure resource information required by the VNF runtime. When the VNF is expanded next time, the newly created VDU can be used to The VNF is expanded. Specifically, the VNFD manager is a logical entity that manages the VNFD file. In actual implementation, a function module needs to be established as a VNFD manager, and the function module Can be integrated in NFVO or deployed in other modules. The role of the VNFD manager includes querying, modifying, and creating, updating, and deleting VNFD files. It is the ultimate implementer of VNFD file management. In the embodiment, the VNFD manager is mainly involved in the process of creating a VDU. . Table 1 shows the functional description of the VNFD Manager.

Table 1

操作operating	描述description
操作operating	描述description	查询Inquire	该操作容许获取VNFD文件的部分或全部内容This operation allows access to some or all of the contents of the VNFD file.
修改modify	该操作容许修改VNFD文件的部分或全部内容This operation allows modification of some or all of the contents of the VNFD file.	查询Inquire
修改modify		创建create	该操作容许创建新的VNFD文件This operation allows the creation of a new VNFD file
更新Update	该操作容许对VNFD文件内容的更新This operation allows updates to the contents of the VNFD file.	创建create
更新Update		删除delete	该操作容许删除VNFD文件This operation allows deletion of VNFD files

It should be noted that, in this embodiment, the management of the VNFD file may be initiated by the VNFM or the Office of Strategic Services (OSS), or may be initiated by an operation and maintenance personnel with advanced rights, for example, One mode is: the operation and maintenance personnel with advanced authority can directly instruct the VNFD manager to perform VNFD file management through the VNF file management interface. The operation and maintenance personnel need to specify the specific content of the VNFD file management; the second way is: VNFM or OSS requests VNFD file management from NFVO. After NFVO permits VNFD file management operation, NFVO initiates an instruction to VNFD manager to instruct VNFD manager to manage VNFD file.

In the VNF expansion method provided by this embodiment, the VNFM vectorizes the VM infrastructure resources required by the VNF runtime and the VM infrastructure resources in all the VDUs, and selects the similarity between the first vector and the second vector to select A second VDU that best matches the VM infrastructure resources required for the VNF runtime, and further compares the degree and match between the VM infrastructure resources in the second VDU and the VM infrastructure resources required by the VNF runtime The size of the threshold is set. When the matching degree is greater than or equal to the preset threshold, the VNF is expanded according to the second VDU, which not only satisfies the requirement of the VNF service, but also does not waste the VM infrastructure resources; suitability When the VNFD file is initialized, the VNF corresponding to the VNF in the VNFD file is expanded to the VNF, and a new VDU is created in the VNFD file through the VNFD manager. This not only enables the VNF expansion to be completed in time, but also ensures that the VNF expansion can be completed in time. The quality of service of the VNF service, and since the new VDU is a newly created VDU based on the VM infrastructure resources required for the VNF service to operate, the newly created VDU and the VNF service need to match the VM infrastructure resources at the time of operation. The next time the VNF is expanded, the new VDU is used to expand the VNF, further reducing the waste of VM infrastructure resources.

FIG. 4 is a flowchart of a method for expanding a VNF according to Embodiment 3 of the present invention. On the basis of the foregoing embodiment shown in FIG. 2 or FIG. 3, the method implementation principle of the step of “expanding the VNF according to the second VDU” specifically includes the following steps:

Step 301: Send a content expansion request to the NFVO according to the second VDU.

The capacity expansion request includes the number of VMs required for capacity expansion and infrastructure resource information of VMs required for capacity expansion.

In this embodiment, the VNFM determines the number of VMs required for capacity expansion and the infrastructure resource information of the VMs required for capacity expansion according to the second VDU, and then generates the VM resources required for the capacity expansion and the VM infrastructure resource information required for the capacity expansion. Expansion request. After receiving the expansion request, the NFVO queries the resource database to determine whether the expansion request is feasible. If the resource in the resource database can satisfy the VNF service, it is determined that the expansion request is feasible, and the NFVO creates a reservation through the virtual resource management VRM (Virtual Resource Management) interface. The resource is not preempted by the VNFM. any news.

Step 302: Receive an expansion instruction sent by the NFVO.

The capacity expansion command carries the resource information allocated by the NFVO according to the expansion request for the expansion of the VNF.

In this embodiment, the resource information allocated by the NFVO for the expansion of the VNF is specifically the reserved resource information created by the NFVO through the VRM interface.

Step 303: Create and start a VM required for the expansion according to the expansion instruction.

Optionally, in this embodiment, a matching module may be established in the VNFM, and a communication interface is established between the matching module and the NFVO, and the matching module is used according to the VNFD file. The VM infrastructure resource information in each VDU and the VM infrastructure resources required by the VNF runtime determine the second VDU that has the greatest matching degree with the VM infrastructure resources required by the VNF runtime from all VDUs of the VNFD file. The communication interface is used to implement communication between the matching module and the NFVO. For example, after the matching module selects the second VDU, the matching request is sent to the VNFO through the communication interface, or when the new VDU needs to be created, the matching module passes the communication interface. Send a VDU creation request to the VNFO.

In this embodiment, the VNFM receives the expansion command sent by the NFVO, and the VNFM creates and starts the VM required for the expansion according to the reserved resource information in the expansion instruction. The specific process is as follows: The VNFM requests the VIM to create the VM required for the expansion. The VIM creates and starts the VM required for the expansion and allocates the network resources accordingly, and then sends the creation success information to the VNFM. The VNFM sets the basic resource information of the VM of the VNF and The parameters of the operating system and the like, and the number of VMs added by the VNF service and the infrastructure resource information of the added VM are sent to the element management device (Element Management, EM for short), so that the EM performs related parameters of the VNF service. After the VNFM reports the successful expansion of the VNF to the NFVO, the NFVO associates the VNF service with the appropriate VIM and resource pool.

In the VNF expansion method provided by the embodiment, after the VNFM determines the second VDU, the VNF sends a capacity expansion request to the NFVO according to the second VDU, and receives the expansion command of the resource information that is transmitted by the NFVO and carries the NFVO according to the expansion request as the VNF expansion. Create and start the VMs needed for capacity expansion according to the expansion command, complete the VNF expansion process, meet the requirements of the VNF service, ensure the service quality, and reduce the waste of VM infrastructure resources.

FIG. 5 is a schematic structural diagram of an apparatus for expanding a VNF according to Embodiment 4 of the present invention. As shown in FIG. 5, the device includes a determining module 11, a matching module 12, and a expansion module 13. The determining module 11 is configured to determine, according to a resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU in the VNFD file, the VM infrastructure resource required for the VNF running; wherein, the first VDU is current and The VDU corresponding to the VNF. The matching module 12 is configured to determine VM infrastructure resources required for the VNF runtime from all VDUs of the VNFD file according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime. The second VDU with the highest matching degree. The expansion module 13 is configured to expand the VNF according to the second VDU.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

Further, on the basis of the foregoing embodiment shown in FIG. 5, in the VNF expansion device provided in the fifth embodiment of the present invention, the expansion module 13 is specifically configured to determine the VM infrastructure resource and the VNF runtime in the second VDU. Whether the matching degree between the required VM infrastructure resources is greater than or equal to a preset threshold; if yes, the expansion module 13 expands the VNF according to the second VDU; if not, the expansion module 13 initializes the VNFD file according to the VNFD file. The VDU corresponding to the VNF expands the VNF and creates a new VDU in the VNFD file through the VNFD manager.

In this embodiment, the matching module 12 is specifically configured to acquire the first vector according to the resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU; according to the VM infrastructure in each VDU in the VNFD file. The resource information acquires a second vector; obtains a matching degree between the first vector and each second vector; and uses a VDU corresponding to the second vector with the largest matching degree as the second VDU.

In this embodiment, the expansion module 13 is further configured to send a VDU creation request to the network function virtualization orchestrator NFVO; wherein the VDU creation request carries the VM infrastructure resource information required by the VNF runtime, for requesting the NFVO to determine the need After creating a new VDU, NFVO instructs the VNFD Manager to create a new VDU in the VNFD file based on the VM infrastructure resource information required by the VNF runtime.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.

Further, on the basis of the foregoing fifth embodiment, in the device for expanding the VNF provided by the sixth embodiment of the present invention, the expansion module 13 is further configured to send a capacity expansion request to the NFVO according to the second VDU; wherein the expansion request includes expansion The number of VMs and the infrastructure resource information of the VMs required for the expansion; the expansion module 13 is specifically configured to receive the expansion command sent by the NFVO, and create and start the VM required for the expansion according to the expansion instruction; wherein the expansion command carries the NFVO The resource information allocated for the expansion of the VNF according to the capacity expansion request.

Optionally, in this embodiment, a communication interface may be established between the matching module and the NFVO, where the communication interface is used to implement communication between the matching module and the NFVO, for example, after the matching module selects the second VDU, The communication interface sends a capacity expansion request to the VNFO, or when a new VDU needs to be created, the matching module sends a VDU creation request to the VNFO through the communication interface.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 6 is a schematic structural diagram of a device for expanding a VNF according to Embodiment 7 of the present invention. As shown in FIG. 6, the device includes a processor 21, a receiver 22, and a transmitter 23. The processor 21 is configured to determine, according to a resource load of a VM that performs a service in the VNF and VM infrastructure resource information in the first VDU in the VNFD file, a VM infrastructure resource required for the VNF operation; where the first VDU is current and The VDU corresponding to the VNF. The processor 21 is configured to determine VM infrastructure resources required for the VNF runtime from all VDUs of the VNFD file according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime. The second VDU with the highest matching degree. The processor 21 is further configured to expand the VNF according to the second VDU. The receiver 22 is configured to receive the resource load of the VM performing the service in the VNF sent by the monitoring device, or the information sent by the other device to the device expanded by the VNF. Transmitter 23 is used to transmit information to other devices that communicate with the VNF-expanded device.

Optionally, the processor 21 is configured to determine whether a matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required by the VNF runtime is greater than or equal to a preset threshold; if yes, The processor 21 expands the VNF according to the second VDU; if not, the processor 21 expands the VNF according to the VNF corresponding to the VNF in the VNFD file according to the VNFD file initialization, and creates a new VNFD file in the VNFD file. VDU.

Optionally, the processor 21 is further configured to acquire the first vector according to the resource load of the VM performing the service in the VNF and the VM infrastructure resource information in the first VDU; according to the VM infrastructure resource information in each VDU in the VNFD file. Obtaining a second vector; acquiring a matching degree between the first vector and each second vector; and using the VDU corresponding to the second vector with the largest matching degree as the second VDU.

Optionally, the transmitter 23 is further configured to send a VDU creation request to the NFVO; wherein the VDU creation request carries VM infrastructure resource information required by the VNF runtime, for requesting the NFVO to determine the NFVO indication after the new VDU needs to be created. The VNFD Manager creates a new VDU in the VNFD file based on the VM infrastructure resource information required by the VNF runtime.

Optionally, the transmitter 23 is further configured to send a capacity expansion request to the NFVO according to the second VDU, where the capacity expansion request includes the number of VMs required for capacity expansion and infrastructure resource information of the VM required for capacity expansion; and the receiver 22 is configured to receive the NFVO. The expansion command sent by the NFVO carries the resource information allocated for the expansion of the VNF according to the expansion request. The processor 21 is further configured to create and start the VM required for the expansion according to the expansion instruction.

The VNF expansion device provided in this embodiment may be used to perform any of the above VNF expansion. The technical solution of the method embodiment has similar implementation principles and technical effects, and details are not described herein again.

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above may be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps of the foregoing method embodiments are performed; and the foregoing storage medium includes: Read-Only Memory (ROM), Random Access Memory (RAM), and Magnetic A variety of media that can store program code, such as a disc or a disc.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A method for expanding a VNF of a virtual network function, comprising:

Determining, according to a resource load of a VM performing the service in the VNF and VM infrastructure resource information in the first VDU in the virtual network descriptor VNFD file, the VM infrastructure resource required by the VNF runtime; a VDU is a VDU currently corresponding to the VNF;

Determining a VM required for the VNF runtime from all VDUs of the VNFD file according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime a second VDU with the greatest matching of infrastructure resources;

The VNF is expanded according to the second VDU.
The method according to claim 1, wherein the expanding the VNF according to the second VDU comprises:

Determining whether a matching degree between the VM infrastructure resource in the second VDU and the VM infrastructure resource required by the VNF runtime is greater than or equal to a preset threshold;

If yes, expanding the VNF according to the second VDU;

If not, the VNF corresponding to the VNF in the VNFD file is expanded according to the VNFD file, and a new VDU is created in the VNFD file by the VNFD manager.
The method according to claim 1 or 2, wherein said determining and running said VNF from all VDUs of said VNFD file based on VM infrastructure resource information in each VDU in said VNFD file The second VDU with the largest matching degree of the required VM infrastructure resources includes:

Obtaining a first vector according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in the first VDU;

Obtaining a second vector according to VM infrastructure resource information in each VDU in the VNFD file;

Obtaining a degree of matching between the first vector and each of the second vectors;

The VDU corresponding to the second vector with the largest degree of matching is used as the second VDU.
The method according to claim 2, wherein the creating a new VDU in the VNFD file by using the VNFD manager includes:

Transmitting a VDU creation request to the network function virtualization orchestrator NFVO; wherein the VDU creation request carries VM infrastructure resource information required by the VNF runtime for requesting the After determining that a new VDU needs to be created, the NFVO instructs the VNFD manager to create the new VDU in the VNFD file based on VM infrastructure resource information required by the VNF runtime.
The method according to claim 4, wherein the expanding the VNF according to the second VDU comprises:

Sending a capacity expansion request to the NFVO according to the second VDU, where the capacity expansion request includes the number of VMs required for capacity expansion and infrastructure resource information of the VM required for capacity expansion;

Receiving the expansion command sent by the NFVO; wherein the expansion instruction carries the resource information allocated by the NFVO according to the expansion request for the expansion of the VNF;

Create and start the VM required for capacity expansion according to the expansion command.
A device for expanding a virtual network function VNF, comprising:

a determining module, configured to determine, according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in a first VDU in a virtual network descriptor VNFD file, a VM infrastructure resource required by the VNF runtime; The first VDU is a VDU currently corresponding to the VNF;

a matching module, configured to determine, according to VM infrastructure resource information in each VDU in the VNFD file and VM infrastructure resources required by the VNF runtime, from all VDUs of the VNFD file to run with the VNF The second VDU with the largest matching degree of VM infrastructure resources required;

And a capacity expansion module, configured to expand the VNF according to the second VDU.
The device according to claim 6, wherein the expansion module is specifically configured to determine a matching degree between a VM infrastructure resource in the second VDU and a VM infrastructure resource required by the VNF runtime. Whether the value is greater than or equal to the preset threshold; if yes, the expansion module expands the VNF according to the second VDU; if not, the expansion module initializes the VNFD file according to the VNFD file The VDU corresponding to the VNF expands the VNF, and creates a new VDU in the VNFD file by using the VNFD manager.
The device according to claim 6 or 7, wherein the matching module is specifically configured to acquire a first according to a resource load of a VM performing a service in the VNF and VM infrastructure resource information in the first VDU. Vector; according to the VM in each VDU in the VNFD file Obtaining a second vector of the infrastructure resource information; acquiring a matching degree between the first vector and each of the second vectors; and using the VDU corresponding to the second vector with the largest matching degree as the second VDU.
The apparatus according to claim 7, wherein the expansion module is further configured to send a VDU creation request to the network function virtualization orchestrator NFVO; wherein the VDU creation request carries a VM required by the VNF runtime Infrastructure resource information for requesting the NFVO, after determining that a new VDU needs to be created, the NFVO instructing the VNFD manager to create in the VNFD file according to VM infrastructure resource information required by the VNF runtime The new VDU.
The device according to claim 9, wherein the expansion module is further configured to send a capacity expansion request to the NFVO according to the second VDU, where the capacity expansion request includes a quantity and capacity expansion of a VM required for capacity expansion. The required resource information of the VM; the expansion module is further configured to receive the expansion command sent by the NFVO, and create and start a VM required for the expansion according to the expansion instruction; wherein the expansion instruction carries the The NFVO allocates resource information allocated for the expansion of the VNF according to the expansion request.