Enablement and acceleration of live and near-live migration of virtual machines and their associated storage across networks

• US 8,429,651 B2
• Filed: 01/20/2010
• Issued: 04/23/2013
• Est. Priority Date: 01/20/2010
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Donnellan, Sean, Dorai, Chitra, Shaikh, Anees A., Sripanidkulchai, Kunwadee, Zheng, Jie
• Primary Examiner(s): NGUYEN, VAN H
• Application Number:
  US12/690,552
• Publication Number:
  US 20110179415A1
• Time in Patent Office: 1,189 Days
• Field of Search: 718/1, 718/100, 718/105
• US Class Current: 718/1
• CPC Class Codes: G06F 2009/4557 Distribution of virtual machine instances; Migration and load balancing
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects

Abstract

A virtual machine is migrated between a source cloud and a destination cloud. A temporary storage is mounted to a partition management firmware of the source cloud and to a partition management firmware of the destination cloud. A first storage location migration migrates the virtual machine from the source cloud to the at least one temporary storage. A second storage location migration migrates the virtual machine from the at least one temporary storage to final destination storage of the destination cloud. The temporary storage is then unmounted from the partition management firmware of the source cloud and from the partition management firmware of the destination cloud.

Claims

1. A computer implemented method for migrating a virtual machine between a source cloud and a destination cloud, the method comprising:

mounting at least one temporary storage to a partition management firmware of the source cloud and to a partition management firmware of the destination cloud;

performing a first storage location migration of the virtual machine from the source cloud to the at least one temporary storage;

performing a second storage location migration of the virtual machine from the at least one temporary storage to final destination storage of the destination cloud; and

unmounting at least one temporary storage from the partition management firmware of the source cloud and from the partition management firmware of the destination cloud.

2. The computer implemented method of claim 1 further comprising:

creating a virtual private network between the source cloud and the destination cloud; and

mounting the at least one temporary storage to the partition management firmware of the source cloud and to the partition management firmware of the destination cloud, wherein at least one temporary storage is a single temporary storage.

3. The computer implemented method of claim 2 further comprising:

responsive to performing a first storage location migration of the virtual machine from the source cloud to the at least one temporary storage, performing a memory state migration of the virtual machine from the partition management firmware of the source cloud to the partition management firmware of the destination cloud; and

wherein the step of performing the second storage location migration of the virtual machine from the at least one temporary storage to final destination storage of the destination cloud is responsive to performing the memory state migration of the virtual machine from the partition management firmware of the source cloud to the partition management firmware of the destination cloud.

4. The computer implemented method of claim 3, wherein the step of performing a memory state migration further comprises:

recording the entire state of the virtual machine in a set of files;

storing the set of files on the at least one temporary storage;

transferring an active memory and an execution state of the virtual machine to the partition management firmware of the destination cloud;

tracking on-going memory transactions in a bitmap;

suspending operation of the virtual machine within a source partition of the source cloud;

copying the bitmap to a destination partition of the destination cloud; and

resuming operation of the virtual machine within the new partition.

5. The computer implemented method of claim 1, wherein the step of performing the first storage location migration further comprises:

moving a home directory of the virtual machine from the source cloud to the at least one temporary storage;

copying contents of storage disk file of the virtual machine from the source cloud to the at least one temporary storage;

records regions of the storage disk file that are written to during copying of the contents of the storage disk file of the virtual, wherein the regions are recorded to a changed block tracking file;

copying contents of storage disk file indicated by the changed block tracking file the source cloud to the at least one temporary storage;

suspending operation of the virtual machine; and

resuming operation of the virtual machine.

6. The computer implemented method of claim 1 further comprising:

mounting the at least one temporary storage to the partition management firmware of the source cloud and to the partition management firmware of the destination cloud, wherein the at least one temporary storage comprises a first temporary storage mounted to the partition management firmware of the source cloud and a second temporary storage mounted to the partition management firmware of the destination cloud;

asynchronous mirroring from the first temporary storage to the second temporary storage; and

responsive to performing the first storage location migration of the virtual machine from the source cloud to the at least one temporary storage, transferring operation of the virtual machine from the source cloud to the destination cloud.

7. The computer implemented method of claim 6, wherein the step of transferring operation of the virtual machine from the source cloud to the destination cloud further comprises:

suspending operation of the virtual machine at the source cloud;

storing an image and memory of the virtual machine to a first temporary storage;

asynchronously mirroring the image and memory of the virtual machine to the second temporary storage; and

restarting the virtual machine in the destination cloud, using the image and the memory of the virtual machine stored within the within the second temporary storage.

8. The computer implemented method of claim 1, wherein various optimizations are introduced during the migration, the optimizations selected from the list consisting of:

enabling a guest operating system to be used by a file system, performing data compression during migration, performing an image duplication across multiple images, reordering a plurality of virtual machine disks to be migrated, and combinations thereof.

9. A data processing system comprising:

a storage having a computer usable program code stored thereof for migrating a virtual machine between a source cloud and a destination cloud;

a bus system connecting the storage to a processor; and

a processor, wherein the processor executes the computer usable program code;

to mount at least one temporary storage to a partition management firmware of the source cloud and to a partition management firmware of the destination cloud;

to perform a first storage location migration of the virtual machine from the source cloud to the at least one temporary storage;

to perform a second storage location migration of the virtual machine from the at least one temporary storage to final destination storage of the destination cloud; and

to unmount the at least one temporary storage from the partition management firmware of the source cloud and from the partition management firmware of the destination cloud.

10. The data processing system of claim 9, wherein the processor further executes the computer usable program code:

to create a virtual private network between the source cloud and the destination cloud; and

to mount the at least one temporary storage to a partition management firmware of the source cloud and to a partition management firmware of the destination cloud, wherein the at least one temporary storage is a single temporary storage.

11. The data processing system of claim 10, wherein the processor further executes the computer usable program code:

responsive to performing the first storage location migration of the virtual machine from the source cloud to the at least one temporary storage, to perform a memory state migration of the virtual machine from the partition management firmware of the source cloud to the partition management firmware of the destination cloud; and

wherein the processor executing the computer usable program code to perform the second storage location migration of the virtual machine from the at least one temporary storage to final destination storage of the destination cloud is responsive to the processor executing the computer usable program code to perform the memory state migration of the virtual machine from the partition management firmware of the source cloud to the partition management firmware of the destination cloud.

12. The data processing system of claim 9, wherein the processor executing the computer usable program code to perform the first storage location migration further comprises the processor executing the computer usable program code:

to move a home directory of the virtual machine from the source cloud to the at least one temporary storage;

to copy contents of storage disk file of the virtual machine from the source cloud to the at least one temporary storage;

to record regions of the storage disk file that are written to during copying of the contents of the storage disk file of the virtual, wherein the regions are recorded to a changed block tracking file;

to copy contents of storage disk file indicated by the changed block tracking file the source cloud to the at least one temporary storage;

to suspend operation of the virtual machine; and

to resume operation of the virtual machine.

13. The data processing system of claim 12, wherein the processor executing the computer usable program code to perform the memory state migration further comprises the processor executing the computer usable program code:

to record the entire state of the virtual machine in a set of files;

to store the set of files on the at least one temporary storage;

to transfer an active memory and an execution state of the virtual machine to the partition management firmware of the destination cloud;

to track on-going memory transactions in a bitmap;

to suspend operation of the virtual machine within a source partition of the source cloud;

to copy the bitmap to the destination partition of the destination cloud; and

to resume operation of the virtual machine within the new partition.

14. The data processing system of claim 9, wherein the processor further executes the computer usable program code:

to mount the at least one temporary storage to the partition management firmware of the source cloud and to the partition management firmware of the destination cloud, wherein the at least one temporary storage comprises a first temporary storage mounted to the partition management firmware of the source cloud and a second temporary storage mounted to the partition management firmware of the destination cloud; and

to asynchronous mirror from the first temporary storage to the second temporary storage.

15. The data processing system of claim 14, wherein the processor further executes the computer usable program code:

responsive to performing the first storage location migration of the virtual machine from the source cloud to the at least one temporary storage, to transfer operation of the virtual machine from the source cloud to the destination cloud.

16. The data processing system of claim 15, wherein the processor executing the computer usable program code to transfer operation of the virtual machine from the source cloud to the destination cloud further comprises the processor executing the computer usable program code:

to suspending operation of the virtual machine at the source cloud;

to store an image and memory of the virtual machine to a first temporary storage;

to asynchronously mirror the image and memory of the virtual machine to the second temporary storage; and

to restart the virtual machine in the destination cloud, using the image and the memory of the virtual machine stored within the within the second temporary storage.

17. The data processing system of claim 9, wherein the processor further executes the computer usable program code to introduce various optimizations during the migration, the optimizations selected from the list consisting of:

enabling a guest operating system to be used by a file system, performing data compression during migration, performing an image duplication across multiple images, reordering a plurality of virtual machine disks to be migrated, and combinations thereof.

18. A non-transitory computer-readable storage medium having computer executable instructions encoded thereon for migrating a virtual machine between a source cloud and a destination cloud, the computer-readable medium comprising:

instructions for mounting at least one temporary storage to a partition management firmware of the source cloud and to a partition management firmware of the destination cloud;

instructions for performing a first storage location migration of the virtual machine from the source cloud to the at least one temporary storage;

instructions for performing a second storage location migration of the virtual machine from the at least one temporary storage to final destination storage of the destination cloud; and

instructions for unmounting the at least one temporary storage from the partition management firmware of the source cloud and from the partition management firmware of the destination cloud.

19. The non-transitory computer-readable storage medium of claim 18 further comprising:

instructions for creating the virtual private network between the source cloud and the destination cloud; and

mounting the at least one temporary storage to the partition management firmware of the source cloud and to the partition management firmware of the destination cloud, wherein the at least one temporary storage is a single temporary storage.

20. The non-transitory computer-readable storage medium of claim 19 further comprising:

instructions, responsive to performing the first storage location migration of the virtual machine from the source cloud to the at least one temporary storage, for performing a memory state migration of the virtual machine from the partition management firmware of the source cloud to the partition management firmware of the destination cloud; and

wherein the instructions for performing the second storage location migration of the virtual machine from the at least one temporary storage to final destination storage of the destination cloud is responsive to performing the memory state migration of the virtual machine from the partition management firmware of the source cloud to the partition management firmware of the destination cloud.

21. The non-transitory computer-readable storage medium of claim 18, wherein the instructions for performing the first storage location migration further comprises:

instructions for moving a home directory of the virtual machine from the source cloud to the at least one temporary storage;

instructions for copying contents of storage disk file of the virtual machine from the source cloud to the at least one temporary storage;

instructions for records regions of the storage disk file that are written to during copying of the contents of the storage disk file of the virtual, wherein the regions are recorded to a changed block tracking file;

instructions for copying contents of storage disk file indicated by the changed block tracking file the source cloud to the at least one temporary storage;

instructions for suspending operation of the virtual machine; and

instructions for resuming operation of the virtual machine.

22. The non-transitory computer-readable storage medium of claim 21, wherein the instructions for performing a memory state migration further comprises:

instructions for recording the entire state of the virtual machine in a set of files;

instructions for storing the set of files on the at least one temporary storage;

instructions for transferring an active memory and an execution state of the virtual machine to the partition management firmware of the destination cloud;

instructions for tracking on-going memory transactions in a bitmap;

instructions for suspending operation of the virtual machine within the source partition of the source cloud;

instructions for copying the bitmap to a destination partition of the destination cloud; and

instructions for resuming operation of the virtual machine within the new partition.

23. The non-transitory computer-readable storage medium of claim 18 further comprising:

instructions for mounting the at least one temporary storage to the partition management firmware of the source cloud and to the partition management firmware of the destination cloud, wherein the at least one temporary storage comprises a first temporary storage mounted to the partition management firmware of the source cloud and a second temporary storage mounted to the partition management firmware of the destination cloud; and

instructions for asynchronous mirroring from the first temporary storage to the second temporary storage.

24. The non-transitory computer-readable storage medium of claim 23 further comprising:

instructions, responsive to performing the first storage location migration of the virtual machine from the source cloud to the at least one temporary storage, for transferring operation of the virtual machine from the source cloud to the destination cloud.

25. The non-transitory computer-readable storage medium of claim 24, wherein the instructions for transferring operation of the virtual machine from the source cloud to the destination cloud further comprises:

instructions for suspending operation of the virtual machine at the source cloud;

instructions for storing an image and memory of the virtual machine to a first temporary storage;

instructions for asynchronously mirroring the image and memory of the virtual machine to the second temporary storage; and

instructions for restarting the virtual machine in the destination cloud, using the image and the memory of the virtual machine stored within the within the second temporary storage.