CN107643939A - A kind of method and system for distributing virtual machine - Google Patents

Abstract

A method for allocating virtual machines, specifically comprising the following steps: selecting a target host machine; creating a new virtual machine under the target host machine; judging whether the number of newly created virtual machines meets the requirements, and if not, continuing to create new virtual machines until the requirements are met . Also included is a system for allocating virtual machines. Reduce the pressure on high-load hosts in virtual clusters, improve the performance of virtual machines; reduce unnecessary power-on hosts in virtual clusters, and reduce cluster power consumption.

Description

Method and system for allocating virtual machines

technical field

The invention relates to the technical field of virtual machine migration, in particular to a method and system for allocating virtual machines.

Background technique

In general virtualization systems, virtual machine migration strategies are designed to ensure the load balance of the entire cluster during operation. Evenly distributed on the host. Centralized allocation of a host's resources may lead to a much higher resource utilization rate of the host than other hosts, and the resource utilization of each host is inconsistent, and even distribution may lead to unbalanced host resources. Although this solution is simple and straightforward, the former will occupy the resources of the host when the virtual machine needs a large amount of resources, resulting in the resource utilization of the host being much higher than that of other hosts, resulting in a decline in the performance of the virtual machine , or even the host machine freezes or fails to generate virtual machines; the latter allocates a small number of virtual machines when the host machine is empty, and the host machines run under low load conditions, resulting in unnecessary power consumption.

Contents of the invention

In order to solve the current problems of performance degradation and power waste of virtual machines, the present invention provides a method and system for allocating virtual machines.

The technical solution adopted by the present invention to solve the technical problem is: a method for allocating virtual machines, which specifically includes the following steps:

Select the target host;

Create a new virtual machine under the target host;

Determine whether the number of newly created virtual machines meets the requirements, and if not, continue to create new virtual machines until the requirements are met.

Furthermore, before selecting the target host, it is necessary to set a high threshold and a low threshold on each host; a high threshold indicates that the load of the host is too high, and no new virtual machine is needed; a low threshold indicates that the load of the host is too low, It is recommended to migrate the virtual machine out.

Further, the method for selecting the target host specifically includes: calculating the amount of remaining resources in the virtualization cluster;

Sort the hosts in the cluster according to the remaining amount of resources;

Exclude hosts above the high threshold and below the low threshold;

Select the host with the least remaining resources among the remaining hosts as the target host.

Further, the method for calculating the remaining amount of resources in the virtualization cluster specifically includes: virtualizing the hardware resources of the host machine through the Hypervisor;

When creating a virtual machine, set the hardware resources required by each virtual machine;

The hypervisor calculates the remaining resources of the host after multiple virtual machines have been created.

Further, the method for selecting the target host machine further includes: when the loads of all the host machines are higher than the high threshold or lower than the low threshold, selecting the host machine whose load is lower than the low threshold as the target host machine.

Further, the method for creating a virtual machine specifically includes: using a Hypervisor to set a required hardware resource size, and creating a virtual machine.

Further, whether the number of newly-created virtual machines meets the requirements specifically includes: judging in real time whether the number of newly-created virtual machines meets the preset number of virtual machines to be built.

A system for allocating virtual machines, using the method, including a host machine selection module for selecting a target host machine; and,

a computing module for computing the remaining hardware resources of the host computer; and,

A virtual machine building module, configured to create a virtual machine under the target host machine; and,

The judging module is used to judge whether the virtual machine is established.

Further, a setting module is also included, which is used to set the threshold of the host machine load, including a high threshold and a low threshold.

Further, the criteria for selecting hosts by the host selection module are: hosts within the high-threshold and low-threshold intervals select hosts with high load; hosts outside the high-threshold and low-threshold intervals select hosts with low load;

The criterion for judging by the judging module that the virtual machine is established is: the number of newly created virtual machines meets the preset number of virtual machines to be built.

The summary of the invention provided above is only a description of the embodiments of the present invention, rather than the invention itself.

The effects provided in the summary of the invention are only the effects of the embodiments, rather than all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

Sort the hosts by resource occupancy, and set high and low thresholds for the resource occupancy of the hosts in the cluster. A low threshold indicates that the load of the host is too low. It is recommended that the virtual machine be moved out and the host sleep to reduce power waste; a high threshold Indicates that the load on the host machine is too high, and it is not recommended to add a new virtual machine. The present invention can independently select the best host machine location for the virtual machine for the cluster, reduce the uneven cluster resource load caused by inappropriate resource allocation during initialization and the migration of the virtual machine afterward, coordinate the load of different host machines in the cluster, and maintain Efficient resource utilization.

Reduce the pressure of high-load hosts in the virtual cluster, improve the performance of the virtual machine; reduce the hosts in the virtual cluster that are not powered on unnecessarily, and reduce the power consumption of the cluster.

Description of drawings

The accompanying drawings described here are used to provide further explanations of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a schematic flow chart of the method of Embodiment 1 of the present invention;

Fig. 2 is a schematic flow chart of the method of Embodiment 2 of the present invention;

Fig. 3 is a schematic diagram of connection of system modules according to an embodiment of the present invention.

detailed description

In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the present invention.

As shown in Figure 1, a method for allocating a virtual machine specifically includes the following steps:

Step 1) Set a high threshold and a low threshold; a high threshold indicates that the load of the host machine is too high, and there is no need to create a new virtual machine, and a low threshold indicates that the load of the host machine is too low, and it is recommended to migrate the virtual machine out.

Step 2) Calculate the amount of remaining resources in the virtualization cluster.

Step 3) Sort the host machines in the cluster according to the remaining resources.

Step 4) Exclude hosts above the high threshold and below the low threshold.

Step 5) Select the host with the least remaining resources among the remaining hosts as the target host.

Step 6) Use the Hypervisor to set the size of the required hardware resources, and create a new virtual machine.

Step 7) Judging whether the number of newly created virtual machines meets the requirements, if not, continue to create new virtual machines until the requirements are met.

As shown in Figure 2, a method for allocating virtual machines can also be:

Step a) is set with a high threshold and a low threshold; a high threshold indicates that the load of the host machine is too high, and there is no need to create a new virtual machine, and a low threshold indicates that the load of the host machine is too low, and it is recommended to migrate the virtual machine out.

Step b) calculating the amount of remaining resources in the virtualization cluster.

Step c) sorting the host machines in the cluster according to the remaining resources.

Step d) Selecting the host with the most remaining resources among the hosts as the target host if there are no hosts below the high threshold and above the low threshold.

Step e) Use the Hypervisor to set the required hardware resource size, and create a new virtual machine.

Step f) judging whether the number of newly created virtual machines meets the requirements, if not, continue to create new virtual machines until the requirements are met.

The methods for calculating the amount of remaining resources in the virtualization cluster specifically include:

The hardware resources of the host machine are virtualized through the Hypervisor.

When creating a virtual machine, set the hardware resources required by each virtual machine.

The hypervisor calculates the remaining resources of the host after multiple virtual machines have been created.

Whether the number of newly created virtual machines meets the requirements is specifically: judging in real time whether the number of newly created virtual machines meets the preset number of virtual machines to be built.

As shown in Figure 3, a system for allocating virtual machines includes a host selection module for selecting a target host; and a calculation module for calculating the remaining hardware resources of the host; and a virtual machine establishment module for The virtual machine is established under the target host machine; and, the judging module is used for judging whether the virtual machine is established.

It also includes a setting module, which is used to set the threshold of the host machine load, including a high threshold and a low threshold.

The criteria for selecting hosts by the host selection module are: hosts within the high threshold and low threshold range select hosts with high load; hosts outside the high threshold and low threshold range select hosts with low load;

The criterion for judging by the judging module that the virtual machine is established is: the number of newly created virtual machines meets the preset number of virtual machines to be built.

The above is only a preferred embodiment of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered as the present invention. protection scope of the invention.

Claims (10)

1. a kind of method for distributing virtual machine, it is characterized in that, specifically include following steps：

Selection target host；

The newly-built virtual machine under target host machine；

Judge whether the quantity of newly-built virtual machine meets to require, if do not met, continue newly-built virtual machine, until meeting to want Ask.

2. the method according to claim 11, it is characterized in that, need to also be on each host before selection target host It is provided with high threshold and Low threshold；High threshold represents host load too high, is not required to again newly-built virtual machine, and Low threshold represents host Machine load too low, it is proposed that virtual machine is moved out.

3. according to the method for claim 2, it is characterized in that, the method for selection target host specifically includes：Calculate virtual Change remaining stock number in cluster；

The host in cluster is ranked up according to the surplus of resource；

Exclusion is higher than high threshold and the host less than Low threshold；

The host that surplus resources are minimum in remaining host is selected as target host machine.

4. according to the method for claim 3, it is characterized in that, the method for calculating remaining stock number in virtual cluster is specific Including：The hardware resource of host is virtualized by Hypervisor；

Hardware resource required for setting each virtual machine when creating virtual machine；

Hypervisor calculates the still remaining resource of host after the completion of multiple virtual machine creatings.

5. according to the method for claim 2, it is characterized in that, the method for selection target host also includes：As all hosts The load of machine is above high threshold or during less than Low threshold, selection load less than Low threshold host as target host machine.

6. according to the method for claim 1, it is characterized in that, the method for newly-built virtual machine specifically includes：Utilize Hardware resource size needed for Hypervisor settings, newly-built virtual machine.

7. according to the method for claim 1, it is characterized in that, whether the quantity of the newly-built virtual machine meets that requirement is specific For：Whether the quantity of the newly-built virtual machine of real-time judge meets the quantity of the default virtual machine that need to be built.

8. a kind of system for distributing virtual machine, using the method described in claim 1-7 any one, it is characterized in that, including place Selection of chiller module, for selection target host；With,

Computing module, for calculating the remaining hardware resource of host；With,

Virtual machine establishes module, for establishing virtual machine under target host machine；With,

Judge module, finished for judging whether virtual machine is established.

9. system according to claim 8, it is characterized in that, in addition to setup module, for the threshold for setting host to load Value, including high threshold and Low threshold.

10. system according to claim 9, it is characterized in that, the standard of host selecting module selection host is：In height Host selection in threshold value and Low threshold section loads high host；Host choosing outside high threshold and Low threshold section Select and load low host；

Judge module judges that virtual machine establishes the standard finished and is：The quantity of newly-built virtual machine meets the default number that need to build virtual machine Amount.