CN106708599B - Virtual machine mirror image issuing system and method - Google Patents
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Abstract
The invention discloses a virtual machine image issuing system and a method thereof, wherein the virtual machine image issuing system comprises a shared memory and a plurality of data centers, and each data center comprises an image management platform; any mirror image management platform is used for acquiring a mirror image, sending the mirror image to the shared memory and synchronizing the metadata of the mirror image to other data centers; the shared memory is used for storing the mirror image; and the data centers are used for acquiring the mirror images from the shared memory according to the metadata of the mirror images and issuing the mirror images. The virtual machine image issuing system and method can avoid occupying larger storage space of each data center, improve available storage space and save resources.
Description
Technical Field
The invention relates to the field of cloud computing, in particular to a virtual machine mirror image issuing system and method.
Background
With the popularization of the internet and the growth of business demands and cost control, many enterprises establish own multidata centers and choose to deploy enterprise applications on virtual machines to quickly respond to disaster backups. Regarding a multi-data center virtual machine management cloud platform, in consideration of convenience of management and service isolation, a currently common method in the industry is to maintain a set of virtual machine management platform for each data center independently for a plurality of data centers and own independent mirror image management system. With the increase of the demand and the limitation of a special operating system, for example, a windows system, patch upgrading can be performed periodically, so that more and more image files can appear, a large disk storage space is occupied, the same image files are uploaded to respective data centers every time the images are upgraded, the resource waste of a virtual machine management platform can be caused, and the working efficiency is low.
In addition, since the new mirror image is acquired in real time when the first Virtual Machine is deployed by using the new mirror image, the process of starting the new mirror image Virtual Machine for the first time is slow, although there is a scheme that a host Machine for a KVM (kernel-based Virtual Machine) meta-operating system acquires the mirror image regularly at present, this way is to make the host Machine of each data center download from a mirror image management warehouse at a uniform timing, which easily causes bandwidth to be occupied, and makes the mirror image management warehouse server become a bottleneck, thereby affecting the issuing efficiency and speed.
Disclosure of Invention
The invention provides a virtual machine image issuing system and method, aiming at overcoming the defect of storage resource waste caused by occupying a large disk storage space due to the upgrading of an image of a host machine in the prior art.
A virtual machine image issuing system comprises a shared memory and a plurality of data centers, wherein each data center comprises an image management platform;
any mirror image management platform is used for acquiring a mirror image, sending the mirror image to the shared memory and synchronizing the metadata of the mirror image to other data centers;
the shared memory is used for storing the mirror image;
and the data centers are used for acquiring the mirror images from the shared memory according to the metadata of the mirror images and issuing the mirror images.
Preferably, the mirrored metadata includes a link address and a mirrored lifecycle tag mirrored in the shared memory;
the mirror life cycle label is a latest available label, an expired label or an issued label;
the latest available label means that the mirror image is in the latest available state; the expired label means that the mirror image exceeds the preset time and is in an undelivered state; the issued label means that the mirror image is in an issued state.
Preferably, the data center further comprises a mirror database; and any mirror image management platform is used for acquiring a mirror image of which the mirror image life cycle label is the latest available label, storing the metadata of the mirror image of which the acquired mirror image life cycle label is the latest available label in the mirror image database, and synchronizing the metadata to the mirror image databases of other data centers.
Preferably, the mirror image management platform comprises a mirror image issuing module and host machine groups, and each host machine group comprises a plurality of host machines;
the mirror image issuing module is used for downloading the mirror image from the shared memory according to the link address and issuing the mirror image to at least one host machine.
Preferably, the mirror image management platform is further configured to mark the change of the mirror image lifecycle tag of the mirror image issued to the host as an issued tag.
Preferably, the image management platform further comprises an expiration cleaning module, and the expiration cleaning module is used for cleaning the image with the expired image life cycle label.
Preferably, the mirror image issuing module comprises a sequence table creating submodule and an issuing submodule;
the sequence table creating submodule is used for creating a host machine sequence table according to the size sequence of the residual available capacity of the host machines in the host machine group;
and the issuing sub-module is used for downloading the mirror image from the shared memory according to the link address and issuing the mirror image to the host machine according to the sequence of the residual available capacity in the host machine sequence list from large to small.
Preferably, the mirror image management platform further comprises a judging module, a downloading issuing module and a copying issuing module;
the judging module is used for calling the downloading and issuing module when the number of the host machines which have issued the mirror image life cycle tags which are the mirror images of the latest available tags in the host machine group is less than N; calling a copy issuing module when the number of the host machines which have issued the mirror image life cycle label as the mirror image of the latest available label in the host machine group is not less than N; wherein N is the number of images allowed to be downloaded from the shared memory by each host group, and N is an integer not less than 1;
the download issuing module is used for downloading the mirror image from the shared memory according to the link address and issuing the mirror image to a host machine which does not acquire the mirror image with the mirror image life cycle label as the mirror image of the latest available label in the host machine group;
the copy issuing module is used for taking the host machine with the mirror image life cycle label as the latest available label in the host machine group as a seed host machine for other host machines to copy the mirror image.
A virtual machine mirror image issuing method is realized by adopting the virtual machine mirror image issuing system, and the method comprises the following steps:
s1, any mirror image management platform acquires a mirror image, sends the mirror image to the shared memory, and synchronizes the mirror image metadata to other data centers;
and S2, the data centers acquire the mirror images from the shared memory according to the metadata of the mirror images and issue the mirror images.
Preferably, the mirrored metadata includes a link address and a mirrored lifecycle tag mirrored in the shared memory;
the mirror life cycle label is a latest available label, an expired label or an issued label;
the latest available label means that the mirror image is in the latest available state; the expired label means that the mirror image exceeds the preset time and is in an undelivered state; the issued label means that the mirror image is in an issued state.
Preferably, the data center further includes a mirror database, and in step S1, any mirror management platform acquires a mirror image whose mirror image lifecycle tag is the latest available tag, and stores metadata of the acquired mirror image whose mirror image lifecycle tag is the latest available tag in the mirror database, and synchronizes to the mirror databases of the other data centers.
Preferably, the mirror image management platform comprises a mirror image issuing module and host machine groups, and each host machine group comprises a plurality of host machines;
in step S2, the image issuing module downloads the image from the shared memory according to the link address and issues the image to at least one of the hosts.
Preferably, the mirror image issuing module comprises a sequence table creating submodule and an issuing submodule;
in step S2, the following substeps are included:
s21, the sequence table creating submodule creates a host machine sequence table according to the size sequence of the residual available capacity of the host machines in the host machine group;
and S22, the issuing submodule downloads the mirror image from the shared memory according to the link address and issues the mirror image to the host machine according to the sequence of the residual available capacity in the sequence table of the host machine from large to small.
Preferably, after step S2, the method further includes the following steps:
s3, judging whether the number of the host machines of the mirror image which have issued the mirror image life cycle label as the latest available label in the host machine group is less than N, if so, executing a step S4, and if not, executing a step S5; wherein N is the number of images allowed to be downloaded from the shared memory by each host group, and N is an integer not less than 1;
s4, downloading the mirror image from the shared memory according to the link address and sending the mirror image to other host machines which do not acquire mirror images with mirror image life cycle labels as the latest available labels in the host machine group;
s5, taking the host with the mirror image life cycle label as the latest available label in the host group as the seed host for other hosts to copy the mirror image.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the virtual machine image issuing system and the virtual machine image issuing method can greatly reduce the occupied space of the image file, improve the image issuing efficiency and speed, and save the issuing bandwidth and flow.
Drawings
Fig. 1 is a schematic structural diagram of a virtual machine image issuing system according to a preferred embodiment of the present invention.
Fig. 2 is a flowchart of a virtual machine image issuing method according to a preferred embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, a virtual machine image issuing system includes a shared memory 1 and a plurality of data centers 2, where each data center 2 includes a mirror database 21 and a mirror management platform 22. The virtual machine image issuing system is based on a virtual machine multi-element operating system of a plurality of data centers, each data center 2 further comprises a virtual machine management platform and a server, the virtual machine management platform is used for deploying virtual machines of different element operating systems according to image types, mainly comprises two types of virtual machines of KVM and VMWARE, and performs operations such as deleting, restarting, expanding and switching on and off the virtual machines.
Any one of the image management platforms 22 is configured to acquire an image, send the image to the shared memory 1, and synchronize metadata of the image to other data centers, where the shared memory 1 is configured to store the image, and the multiple data centers 2 are configured to acquire the image from the shared memory 1 according to the metadata of the image and issue the image. Therefore, the defect of storage capacity waste caused by the fact that each data center stores the same mirror image file can be effectively avoided, and the effective utilization rate of the storage capacity of the data center is improved.
The metadata of the mirror image comprises a link address of the mirror image in the shared memory, a mirror image lifecycle tag, a mirror image ID, a mirror image name, a mirror image format, a mirror image file size, a hypervisor type corresponding to the mirror image and the like. The mirror image life cycle label is a latest available label, an expired label or a issued label, the latest available label means that the mirror image is in a latest available state, the expired label means that the mirror image exceeds a preset time length and is in an undelivered state, and the issued label means that the mirror image is in an issued state. Therefore, the latest manufactured mirror image can be marked as latest available by the latest available label, the mirror image which exceeds the preset time and is not used for deploying the virtual machine is marked as expired by the expired label, the mirror image which is completed on all host machines of the data center is marked as issued, and management of the mirror image is facilitated.
Any one of the mirror image management platforms 22 is configured to acquire a mirror image whose mirror image lifecycle tag is the latest available tag, store metadata of the acquired mirror image whose mirror image lifecycle tag is the latest available tag in the mirror image database, and synchronize the metadata to the mirror image databases of the other data centers.
The image management platform 22 includes an image issuing module 221 and host groups 220, and each of the host groups 220 includes a plurality of hosts 2201. The image issuing module 221 is configured to download the image from the shared memory 1 according to the link address and issue the image to at least one host 2201.
The image sending module 221 includes a sequence table creating sub-module 2211 and a sending sub-module 2212, where the sequence table creating sub-module 2211 is configured to create a host sequence table according to a size sequence of the remaining available capacity of the hosts 2201 in the host group 220, and the sending sub-module 2212 is configured to download the images from the shared memory according to the link addresses, and send the images to the hosts according to a sequence from large to small of the remaining available capacity in the host sequence table, so as to ensure that the host with the largest remaining available capacity is preferentially sent the images.
The image management platform 22 further includes a determining module 222, a downloading issuing module 223, and a copying issuing module 224, where the determining module 222 is configured to invoke the downloading issuing module 223 when the number of hosts that have issued images with lifetime tags as the latest available tags in the host group 220 is less than N, and invoke the copying issuing module 224 when the number of hosts that have issued images with lifetime tags as the latest available tags in the host group 220 is not less than N, where N is the number of images that are allowed to be downloaded from the shared memory by each host group, and N is an integer not less than 1. The download issuing module 223 is configured to download the mirror image from the shared memory 1 according to the link address and issue the mirror image to a host that does not acquire a mirror image lifecycle label as a mirror image of a latest available label in the host group 220. The copy issuing module 224 is configured to use the host having the mirror image with the mirror image lifecycle tag as the latest available tag in the host group 220 as a seed host for other hosts to copy the mirror image. Other hosts become seed hosts after copying the mirror image to further support other non-copied hosts to copy, so that mutual copying between the same host groups is achieved, the host groups are logically classified according to machine rooms or racks, namely one machine room or rack is a host group, and one host group is a logic area, so that machine room bandwidth and flow can be saved, high-speed downloading of the hosts is achieved, and issuing efficiency is improved.
The mirror image management platform 22 is further configured to mark the change of the mirror image lifecycle tag of the mirror image issued to the host 2201 as an issued tag. The image management platform 22 further includes an expiration cleaning module 225, where the expiration cleaning module 225 is configured to clean the image whose image lifecycle label is an expired label. By automatically cleaning the expired mirror images, the resource waste of the storage space is reduced, and the effective utilization rate of the storage capacity is further improved.
In summary, the virtual machine image issuing system of the invention can greatly reduce the occupied space of the image file, improve the image issuing efficiency and speed, and save the issuing bandwidth and flow.
As shown in fig. 2, this embodiment further provides a virtual machine image issuing method, which is implemented by using the virtual machine image issuing system described above, and includes the following steps:
step S1, any mirror image management platform acquires a mirror image, sends the mirror image to the shared memory, and synchronizes the mirror image metadata to other data centers.
The metadata of the mirror image comprises a link address of the mirror image in the shared memory and a mirror image lifecycle label, wherein the mirror image lifecycle label is a latest available label, an expired label or an issued label, the latest available label means that the mirror image is in a latest available state, the expired label means that the mirror image exceeds a preset time length and is in an undelivered state, and the issued label means that the mirror image is in an issued state.
The data center further comprises a mirror database, any mirror management platform acquires a mirror image of which the mirror image life cycle label is the latest available label, and stores the metadata of the mirror image of which the acquired mirror image life cycle label is the latest available label in the mirror database and synchronizes the metadata to the mirror database of other data centers.
And step S2, the data centers acquire the mirror image from the shared memory according to the metadata of the mirror image and issue the mirror image.
The mirror image management platform comprises a mirror image issuing module and host machine groups, each host machine group comprises a plurality of host machines, and the mirror image issuing module downloads the mirror image from the shared memory according to the link address and issues the mirror image to at least one host machine. The mirror image issuing module comprises a sequence table creating submodule and an issuing submodule. In step S2, the method further includes the following substeps:
step S21, the sequence table creating submodule creates a host machine sequence table according to the size sequence of the residual available capacity of the host machines in the host machine group;
and step S22, the issuing submodule downloads the mirror image from the shared memory according to the link address and issues the mirror image to the host machine according to the sequence of the residual available capacity in the sequence table of the host machine from large to small.
Step S3, determining whether the number of hosts that have issued the mirror image with the mirror image lifecycle label as the latest available label in the host group is less than N, if yes, going to step S4, and if not, going to step S5, where N is the number of mirror images that are allowed to be downloaded from the shared memory by each host group, and N is an integer not less than 1.
And step S4, downloading the mirror image from the shared memory according to the link address and sending the mirror image to other host machines which do not acquire mirror images with mirror image life cycle labels as the latest available labels in the host machine group.
Step S5, the host machine with the mirror image whose life cycle label is the latest available label in the host machine group is used as the seed host machine for other host machines to copy the mirror image.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (12)
1. A virtual machine image issuing system is characterized by comprising a shared memory and a plurality of data centers, wherein each data center comprises an image management platform;
any mirror image management platform is used for acquiring a mirror image, sending the mirror image to the shared memory and synchronizing the metadata of the mirror image to other data centers;
the shared memory is used for storing the mirror image;
the data centers are used for acquiring the mirror images from the shared memory according to the metadata of the mirror images and issuing the mirror images;
the mirrored metadata includes a link address and a mirrored lifecycle tag mirrored at the shared memory;
the mirror life cycle label is a latest available label, an expired label or an issued label;
the latest available label means that the mirror image is in the latest available state; the expired label means that the mirror image exceeds the preset time and is in an undelivered state; the issued label means that the mirror image is in an issued state.
2. The virtual machine image issuing system according to claim 1, wherein the data center further includes a mirror database; and any mirror image management platform is used for acquiring a mirror image of which the mirror image life cycle label is the latest available label, storing the metadata of the mirror image of which the acquired mirror image life cycle label is the latest available label in the mirror image database, and synchronizing the metadata to the mirror image databases of other data centers.
3. The virtual machine image issuing system according to claim 2, wherein the image management platform includes an image issuing module and host groups, each of the host groups including a plurality of host machines;
the mirror image issuing module is used for downloading the mirror image from the shared memory according to the link address and issuing the mirror image to at least one host machine.
4. The virtual machine image issuing system according to claim 3, wherein the image management platform is further configured to mark the change of the image lifecycle label issued to the image in the host as an issued label.
5. The virtual machine image issuing system according to claim 2, wherein the image management platform further includes an expiration cleaning module, and the expiration cleaning module is configured to clean an image whose image life cycle label is an expired label.
6. The virtual machine image issuing system according to claim 3, wherein the image issuing module includes a sequence table creation submodule and an issuing submodule;
the sequence table creating submodule is used for creating a host machine sequence table according to the size sequence of the residual available capacity of the host machines in the host machine group;
and the issuing sub-module is used for downloading the mirror image from the shared memory according to the link address and issuing the mirror image to the host machine according to the sequence of the residual available capacity in the host machine sequence list from large to small.
7. The virtual machine image issuing system according to claim 3, wherein the image management platform further includes a judgment module, a download issuing module, and a copy issuing module;
the judging module is used for calling the downloading and issuing module when the number of the host machines which have issued the mirror image life cycle tags which are the mirror images of the latest available tags in the host machine group is less than N; calling a copy issuing module when the number of the host machines which have issued the mirror image life cycle label as the mirror image of the latest available label in the host machine group is not less than N; wherein N is the number of images allowed to be downloaded from the shared memory by each host group, and N is an integer not less than 1;
the download issuing module is used for downloading the mirror image from the shared memory according to the link address and issuing the mirror image to a host machine which does not acquire the mirror image with the mirror image life cycle label as the mirror image of the latest available label in the host machine group;
the copy issuing module is used for taking the host machine with the mirror image life cycle label as the latest available label in the host machine group as a seed host machine for other host machines to copy the mirror image.
8. A virtual machine image issuing method implemented by the virtual machine image issuing system according to claim 1, the method comprising the steps of:
s1, any mirror image management platform acquires a mirror image, sends the mirror image to the shared memory, and synchronizes the mirror image metadata to other data centers;
s2, the data centers acquire the mirror images from the shared memory according to the metadata of the mirror images and issue the mirror images;
the mirrored metadata includes a link address and a mirrored lifecycle tag mirrored at the shared memory;
the mirror life cycle label is a latest available label, an expired label or an issued label;
the latest available label means that the mirror image is in the latest available state; the expired label means that the mirror image exceeds the preset time and is in an undelivered state; the issued label means that the mirror image is in an issued state.
9. The virtual machine image issuing method according to claim 8, wherein the data center further includes an image database, and in step S1, any one of the image management platforms acquires an image whose image lifecycle tag is the latest available tag, and stores metadata of the acquired image whose lifecycle tag is the latest available tag in the image database, and synchronizes to the image databases of the other data centers.
10. The virtual machine image issuing method according to claim 9, wherein the image management platform includes an image issuing module and host groups, each of the host groups including a plurality of host machines;
in step S2, the image issuing module downloads the image from the shared memory according to the link address and issues the image to at least one of the hosts.
11. The virtual machine image issuing method according to claim 10, wherein the image issuing module includes a sequence table creating submodule and an issuing submodule;
in step S2, the following substeps are included:
s21, the sequence table creating submodule creates a host machine sequence table according to the size sequence of the residual available capacity of the host machines in the host machine group;
and S22, the issuing submodule downloads the mirror image from the shared memory according to the link address and issues the mirror image to the host machine according to the sequence of the residual available capacity in the sequence table of the host machine from large to small.
12. The virtual machine image issuing method according to claim 10, further comprising, after step S2, the steps of:
s3, judging whether the number of the host machines of the mirror image which have issued the mirror image life cycle label as the latest available label in the host machine group is less than N, if so, executing a step S4, and if not, executing a step S5; wherein N is the number of images allowed to be downloaded from the shared memory by each host group, and N is an integer not less than 1;
s4, downloading the mirror image from the shared memory according to the link address and sending the mirror image to other host machines which do not acquire mirror images with mirror image life cycle labels as the latest available labels in the host machine group;
s5, taking the host with the mirror image life cycle label as the latest available label in the host group as the seed host for other hosts to copy the mirror image.
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