WO2017148382A1

WO2017148382A1 - Method and apparatus for accessing storage device by virtual machine in cloud computing management platform

Info

Publication number: WO2017148382A1
Application number: PCT/CN2017/075301
Authority: WO
Inventors: 金友兵; 周海平
Original assignee: 北京书生国际信息技术有限公司; 书生云公司
Priority date: 2016-03-03
Filing date: 2017-03-01
Publication date: 2017-09-08
Also published as: CN105808165A; CN105808165B

Abstract

Embodiments of the present invention provide a method and apparatus for accessing a storage device by a virtual machine in a cloud computing management platform. The method comprises: determining whether a storage device to be accessed by a virtual machine is located a same physical machine where the virtual machine is located; and if yes, directly mounting the virtual machine to the storage device. By means of the method and apparatus for accessing a storage device by a virtual machine in a cloud computing management platform provided in the embodiments of the present invention, the problem of the prior art is resolved in which a virtual machine cannot be directly connected to a local storage device and the connection must be performed by means of an iSCSI protocol.

Description

Method and device for virtual machine accessing storage device in cloud computing management platform

Technical field

The present invention relates to the field of cloud storage technologies, and in particular, to a method and apparatus for accessing a storage device by a virtual machine in a cloud computing management platform.

Background technique

In a cloud computing system, a virtual machine reads and writes data by accessing a storage device in the storage network. Take the cloud computing system adopting the openstack framework as an example. The computing nodes are connected to the storage devices in the storage network through the iSCSI protocol. FIG. 1 shows a conventional architecture of a computing node connected storage device provided by the prior art. As shown in Figure 1, each virtual machine located on physical machine A (computing node) must communicate with the iSCSI server in another physical machine B (storage node) through an iSCSI client and further pass the iSCSI The server connects to the corresponding storage device (physical disk).

Another architecture of the computing node connected storage device provided by the prior art shown in FIG. 2 is shown in FIG. 2. As shown in Figure 2, the storage node and the compute node are all located on the same physical machine A. At this time, if the file is still read and written by the iscsi protocol, it is not optimized. If the virtual machine can directly connect to the corresponding local storage device without going through the iSCSI protocol, there will be a significant improvement in read and write performance. Thus, there is an urgent need for a method for enabling a virtual machine to directly connect to a local storage device.

Summary of the invention

In view of this, the embodiment of the present invention provides a method and an apparatus for a virtual machine to access a storage device in a cloud computing management platform, which solves the problem that the virtual machine cannot directly connect to the local storage device in the prior art, but must be connected through the iSCSI protocol. The problem.

A virtual machine accessing storage device in a cloud computing management platform according to an embodiment of the invention The methods include:

Determining whether the storage device to be accessed by the virtual machine is in the same physical machine as the virtual machine;

If yes, the virtual machine directly mounts the storage device.

Among them, further includes:

Obtaining a globally unique name of the storage device to be accessed by the virtual machine;

Determining whether the storage device to be accessed by the virtual machine and the virtual machine are in the same physical machine includes:

Looking in the file system of the physical machine where the virtual machine is located, whether the name of the storage device contains the global unique name of the storage device to be accessed.

The global unique name of the storage device to be accessed by the virtual machine includes:

Obtaining a globally unique name of the storage device according to a target link of the virtual machine for connecting to the storage device.

The directly mounting the storage device by the virtual machine includes:

A file system associated with the virtual machine for connecting the target link of the storage device to a physical machine where the virtual machine is located corresponds to a virtual storage device created by the storage device.

The virtual storage device created by the storage device that is associated with the target device that is connected to the storage device and is connected to the physical device of the virtual device includes:

Defining, according to the global unique name of the storage device that the virtual machine is to access, the virtual storage device created by the file system corresponding to the storage device;

The target link used by the virtual machine to connect to the storage device is changed to an address of the virtual storage device created by the file system corresponding to the storage device.

The address of the virtual storage device that is used to connect the storage device to the storage device is changed to:

In the namespace of the virtual machine, replace the target link parameter used to connect the storage device with the address of the virtual storage device created by the file system corresponding to the storage device.

Among them, further includes:

If not, the virtual machine is connected to the storage device via an iSCSI protocol.

The connecting the virtual machine to the storage device by using an iSCSI protocol includes:

The target link used by the virtual machine to connect to the storage device is associated with a virtual storage device created by the storage device corresponding to the iSCSI.

The cloud computing management platform is OpenStack, CloudStack, VMware vCloud, Microsoft Azure Pack, OpenNebula or Eucalyptus.

An apparatus for accessing a storage device by a virtual machine in a cloud computing management platform according to an embodiment of the present invention includes:

a determining module, configured to determine whether the storage device to be accessed by the virtual machine is in the same physical machine as the virtual machine;

The mounting module is configured to enable the virtual machine to directly mount the storage device when the result returned by the determining module is YES.

Among them, further includes:

An obtaining module, configured to obtain a global unique name of a storage device to be accessed by the virtual machine;

The determining module is further configured to: in the file system of the physical machine where the virtual machine is located, find out whether the name of the storage device includes a global unique name of the storage device to be accessed.

The obtaining module is further configured to:

The mounting module is further configured to:

When the result returned by the determining module is yes, the file link that the virtual machine uses to connect the target link of the storage device to the physical machine where the virtual machine is located corresponds to the virtual storage created by the storage device. device.

The mounting module is further configured to:

When the result returned by the determining module is no, the virtual machine is connected to the storage device through an iSCSI protocol.

The method and device for accessing a storage device by a virtual machine in a cloud computing management platform are provided by the embodiment of the present invention. When the virtual machine is connected to the storage device, it is first determined whether the storage device is in the same physical machine as the storage device. The physical machine is directly attached to the storage device. Thereby, the direct connection between the virtual machine and the storage device in the same physical machine is realized, without the network communication based on the iSCSI protocol, thereby greatly improving the data read and write speed of the virtual machine.

DRAWINGS

FIG. 1 shows a conventional architecture of a computing node connected storage device provided by the prior art.

Another architecture of the computing node connected storage device provided by the prior art shown in FIG. 2 is shown in FIG. 2.

FIG. 3 is a flowchart of a method for a virtual machine to access a storage device in a cloud computing management platform according to an embodiment of the present invention.

FIG. 4 is a schematic diagram showing the principle of a method for a virtual machine to access a storage device in a cloud computing management platform according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present 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. 3 is a flowchart of a method for a virtual machine to access a storage device in a cloud computing management platform according to an embodiment of the present invention. As shown in FIG. 3, the method includes:

Step 301: Determine whether the storage device to be accessed by the virtual machine is in the same physical state as the virtual machine. machine.

In an embodiment of the present invention, whether the storage device is in the same physical machine as the virtual machine may be determined according to a globally unique name of the storage device in the cloud computing management platform. Specifically, first obtain the global unique name of the storage device to be accessed by the virtual machine, and then find in the file system of the physical machine where the virtual machine is located whether the name of the storage device contains the global unique name of the storage device to be accessed. . If the global unique name is found in the storage device information registered in the file system, the storage device is a registered device in the file system of the physical machine where the virtual machine is located, that is, the storage device is the same as the virtual device. On the same physical machine.

Step 302: If yes, the virtual machine directly mounts the storage device. When it is determined that the virtual machine and the storage device are in the same physical machine, the virtual machine directly mounts the storage device, thereby implementing a direct connection between the virtual machine and the storage device in the same physical machine, without The network communication of the iSCSI protocol greatly improves the data read and write speed of the virtual machine. If it is determined that the virtual machine and the storage device are not in the same physical machine, the virtual machine is connected to the storage device through the iSCSI protocol.

In an embodiment of the present invention, in the physical machine where the virtual machine is located, there are two virtual storage devices corresponding to each storage device, and the two virtual storage devices are respectively created by iSCSI and the file system of the physical machine. At this time, mounting the virtual machine to a storage device actually associates a target link of the virtual machine for connecting to the storage device to one of two virtual storage devices corresponding to the storage device.

When it is determined that the virtual machine is in the same physical machine as the storage device to be accessed, the virtual machine needs to be directly connected to the file system of the physical machine where the virtual machine is located, as shown in FIG. 4, and further finds the file system through the file system. Registered storage device and read and write data for the storage device. At this time, the process of mounting the virtual machine to the storage device is actually associated with the target link connecting the virtual machine to the storage device to the virtual storage device created by the storage device. Specifically, the virtual storage device created by the file system corresponding to the storage device may be found according to the global unique name of the storage device to be accessed by the virtual machine; and then the target link used by the virtual machine to connect to the storage device is changed to the file. The system corresponds to the address of the virtual storage device created by the storage device. In a real In a specific implementation manner of the embodiment, the target link parameter used to connect the storage device is replaced with the virtual storage created by the file system corresponding to the storage device in a namespace of a virtual machine. The address of the device. For example, in the Linux operating system, the above-mentioned namespace setting of the virtual machine can be completed by calling libvirt, and the setting process should follow the libvirt parameter rule. In this way, the direct mount between the virtual machine and the storage device can be realized, without the network communication based on the iSCSI protocol, thereby greatly improving the data read and write speed of the virtual machine.

When it is determined that the virtual machine is not in the same physical machine as the storage device to be accessed, the virtual machine needs to be connected to the storage device through the iSCSI protocol. In this case, the target link connecting the virtual machine to the storage device needs to be associated with the iSCSI. A virtual storage device created for the storage device.

In an embodiment of the present invention, the virtual machine may be connected to the virtual storage device created by the iSCSI by default, and when it is determined that the virtual machine and the storage device to be connected are in the same physical machine, the virtual machine and the storage are The device is directly mounted. However, the present invention does not limit the default mounting manner of the virtual machine and the storage device.

In an embodiment of the present invention, a virtual machine instance 001 is located on a physical machine of a computing node in the cloud computing management platform, and the virtual machine instance 001 needs to access a storage device whose volume is named volume-123456, and each of the cloud computing management platforms The volume names of the storage devices are unique. If the storage device named volume-123456 is mounted on the virtual machine instance001, the following steps are required on the compute node where the virtual machine instance001 is located:

1) Find the iSCSI link parameter in the default mount information of the virtual machine instance001 from the database of the compute node, and obtain the volume named volume-123456 of the storage device to be accessed from the iSCSI link parameter.

2) Search for the corresponding storage device in the /dev directory of the local Linux operating system of the computing node according to the obtained volume name volume-123456. The name of the storage device may be volume-123456 or 123456 in the /dev directory.

3) If a storage device named volume-123456 or 123456 is found in the /dev directory The storage device named volume-123456 and the virtual machine instance001 must be on the same physical machine, so modify the disk_info parameter passed to libvirt, and connect the virtual machine instance001 to the iSCSI-target link address by default. Replace the cost of the local file system with the address of the virtual storage device created by the storage device volume-123456 (for example, /dev/xxx/volume name). This achieves direct interconnection between the virtual machine instance001 and the local storage device volume-123456.

If the storage device named volume-123456 or 123456 is not found in the /dev directory, the storage device whose volume is named volume-123456 is not on the same physical machine as the virtual machine instance001, so the virtual machine instance001 is retained. The original iSCSI-target link address is not modified. In this way, the virtual machine instance001 will connect to the storage device volume-123456 through the iSCSI protocol in the default manner.

In an embodiment of the present invention, the method for accessing a storage device by a virtual machine in a cloud computing management platform is applied to a cloud computing management platform adopting an Openstack architecture. The storage management module of the Openstack architecture is Cinder. In the Openstack architecture, the storage device attached to the compute node through the storage management module Cinder is named as a full-length unique long-character code; when the compute node names the iSCSI target connection of the storage device that the virtual machine wants to access, The unique long character code of the entire platform will also be attached; and at each physical machine terminal, the name of the storage device is registered with the local file system of the physical machine through the iSCSI protocol, and the unique long character code of the entire platform is also attached. . Therefore, the unique long character code of the entire platform can be used as a global unique name to determine whether the virtual machine is on the same physical machine as the storage device to be accessed.

Specifically, the global unique name of the storage device (a long-length unique character code of the entire platform) may be obtained according to the target link that the virtual machine uses to connect to the storage device, and then searched in the file system of the local physical machine of the virtual machine. The globally unique name. If the global unique name is found in the device information registered in the file system, the storage device is a registered device in the file system of the physical machine where the virtual machine is located, that is, the storage device is in the same virtual machine as the virtual machine. The same physical machine, and then the virtual machine and the local storage device are mounted.

It should be understood that the method for accessing a storage device by using a virtual machine according to an embodiment of the present invention may also be applied to other cloud computing management platforms other than Openstack, such as CloudStack, VMware vCloud, Microsoft Azure Pack, OpenNebula, or Eucalyptus, etc. Not limited.

It should be understood that the foregoing storage device may be a physical disk, and is also a storage medium of other forms. The specific implementation form of the storage device is not limited in the present invention.

An embodiment of the present invention provides an apparatus for accessing a storage device by a virtual machine in a cloud computing management platform, including:

a judging module configured to determine whether the storage device to be accessed by the virtual machine is in the same physical machine as the virtual machine;

In an embodiment of the present invention, the global unique name of the storage device in the cloud computing management platform may be used to determine whether the storage device and the virtual machine are located in the same physical machine, and the device further includes:

An acquisition module, configured to obtain a globally unique name of a storage device to be accessed by the virtual machine;

The judging module is further configured to: in the file system of the physical machine where the virtual machine is located, find out whether the name of the storage device contains the global unique name of the storage device to be accessed.

In an embodiment of the invention, the obtaining module is further configured to:

Get the globally unique name of the storage device based on the target link that the virtual machine uses to connect to the storage device.

In an embodiment of the invention, the mounting module is further configured to:

When the result returned by the determining module is yes, the target link used by the virtual machine to connect to the storage device is associated with the virtual storage device created by the file system corresponding to the storage device of the physical machine where the virtual machine is located.

In an embodiment of the invention, the mounting module is further configured to: when the result returned by the determining module is negative, the virtual machine is connected to the storage device through the iSCSI protocol. Specifically, it can be virtual The target link used to connect the storage device is associated with the virtual storage device created by the iSCSI corresponding storage device.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., which are within the spirit and principles of the present invention, should be included in the scope of the present invention. within.

Claims

A method for a virtual machine to access a storage device in a cloud computing management platform, comprising:

Determining whether the storage device to be accessed by the virtual machine is in the same physical machine as the virtual machine;

If yes, the virtual machine directly mounts the storage device.
The method of claim 1 further comprising:

Obtaining a globally unique name of the storage device to be accessed by the virtual machine;

Determining whether the storage device to be accessed by the virtual machine and the virtual machine are in the same physical machine includes:

Looking in the file system of the physical machine where the virtual machine is located, whether the name of the storage device contains the global unique name of the storage device to be accessed.
The method according to claim 2, wherein the obtaining a global unique name of the storage device to be accessed by the virtual machine comprises:

Obtaining a globally unique name of the storage device according to a target link of the virtual machine for connecting to the storage device.
The method of claim 3, wherein the directly mounting the storage device by the virtual machine comprises:

A file system associated with the virtual machine for connecting the target link of the storage device to a physical machine where the virtual machine is located corresponds to a virtual storage device created by the storage device.
The method according to claim 4, wherein the file system associated with the virtual machine for connecting the target link of the storage device to the physical machine where the virtual machine is located corresponds to the virtual file created by the storage device Storage devices include:

Defining, according to the global unique name of the storage device that the virtual machine is to access, the virtual storage device created by the file system corresponding to the storage device;

Changing a target link of the virtual machine for connecting the storage device to the file system Corresponding to the address of the virtual storage device created by the storage device.
The method of claim 5, wherein changing the target link of the virtual machine for connecting the storage device to the address of the virtual storage device created by the file system corresponding to the storage device comprises:

In the namespace of the virtual machine, replace the target link parameter used to connect the storage device with the address of the virtual storage device created by the file system corresponding to the storage device.
The method of claim 1 further comprising:

If not, the virtual machine is connected to the storage device via an iSCSI protocol.
The method according to claim 7, wherein the connecting the virtual machine to the storage device by using an iSCSI protocol comprises:

The target link used by the virtual machine to connect to the storage device is associated with a virtual storage device created by the storage device corresponding to the iSCSI.
The method according to claim 1, wherein the cloud computing management platform is OpenStack, CloudStack, VMware vCloud, Microsoft Azure Pack, OpenNebula or Eucalyptus.
An apparatus for accessing a storage device by a virtual machine in a cloud computing management platform, comprising:

a determining module, configured to determine whether the storage device to be accessed by the virtual machine is in the same physical machine as the virtual machine;

The mounting module is configured to enable the virtual machine to directly mount the storage device when the result returned by the determining module is YES.
The device according to claim 10, further comprising:

An obtaining module, configured to obtain a global unique name of a storage device to be accessed by the virtual machine;

The determining module is further configured to: in the file system of the physical machine where the virtual machine is located, find out whether the name of the storage device includes a global unique name of the storage device to be accessed.
The apparatus according to claim 11, wherein the obtaining module is further configured to:

Obtaining a globally unique name of the storage device according to a target link of the virtual machine for connecting to the storage device.
The device according to claim 10, wherein the mounting module is further configured to:

When the result returned by the determining module is yes, the file link that the virtual machine uses to connect the target link of the storage device to the physical machine where the virtual machine is located corresponds to the virtual storage created by the storage device. device.
The device according to claim 13, wherein the mounting module is further configured to:

When the result returned by the determining module is no, the virtual machine is connected to the storage device through an iSCSI protocol.
The device according to claim 14, wherein the connecting the virtual machine to the storage device through an iSCSI protocol comprises:

The target link used by the virtual machine to connect to the storage device is associated with a virtual storage device created by the storage device corresponding to the iSCSI.