Provisioning a pass-through disk in a virtualized computing environment

1. A method, comprising:

determining, by a host machine, that a storage device from a network storage system is available to the host machine as a pass-through disk;

receiving, by the host machine a request from the virtual machine for the pass-through disk;

assigning the pass-through disk to a temporary resource group on the host machine; and

logically attaching the pass-through disk from the temporary resource group to a virtual machine running on the host machine.

2. The method of claim 1 , further comprising:

if a storage device is not available to the host machine, requesting that the network storage system provision a new storage device.

3. The method of claim 2 , wherein the storage device comprises a logical unit number (LUN).

4. The method of claim 1 , wherein the temporary resource group comprises a first identifier to identify the virtual machine and a second identifier to identify the pass-through disk.

5. The method of claim 1 , wherein logically attaching the pass-through disk to the virtual machine comprises adding a disk resource to the temporary resource group, and logically attaching the disk to a virtual storage controller on the host machine, wherein the virtual storage controller is owned by the virtual machine.

6. The method of claim 5 , further comprising:

moving the disk resource from the temporary resource group to a virtual machine resource group on the host machine; and

deleting the temporary resource group.

7. The method of claim 6 , further comprising:

notifying the virtual machine that the pass-through disk is available.

8. A system comprising:

an array of mass storage devices;

a network storage system coupled to the array of mass storage devices; and

a host machine running virtualization software, the virtualization software configured to:

determine that a storage device from the array of mass storage devices is available to the host machine as a pass-through disk;

receive a request from the virtual machine for the pass-through disk;

assign a disk resource representing the pass-through disk to a temporary resource group on the host machine; and

logically attach the pass-through disk from the temporary resource group to a virtual machine running on the host machine.

9. The system of claim 8 , wherein the virtualization software is further configured to:

request that the network storage system provision a new storage device if a storage device is not available to the host machine.

10. The system of claim 9 , wherein the storage device comprises a logical unit number (LUN).

11. The system of claim 8 , wherein the temporary resource group comprises a first identifier to identify the virtual machine and a second identifier to identify the pass-through disk.

12. The system of claim 8 , wherein when the virtualization software logically attaches the pass-through disk to the virtual machine, the virtualization software is configured to add the disk resource to the temporary resource group and logically attach the disk to a virtual storage controller on the host machine, wherein the virtual storage controller is owned by the virtual machine.

13. The system of claim 12 , wherein the virtualization software is further configured to:

notify the virtual machine that the pass-through disk is available.

14. The system of claim 8 , wherein the virtualization software is further configured to:

move the disk resource from the temporary resource group to a virtual machine resource group; and

delete the temporary resource group.

15. A processing device comprising:

a processor unit; and

a memory, coupled to the processor unit, storing instructions which, when executed by the processor unit, cause the processing device to:

receive a request from a virtual machine for a pass-through disk;

request that a network storage system provision a new storage device;

assign a disk resource representing the storage device to a temporary resource group on the host machine; and

logically attach the storage device from the temporary resource group to the virtual machine as the pass-through disk.

16. The processing device of claim 15 , wherein the storage device comprises a logical unit number (LUN).

17. The processing device of claim 15 , wherein the temporary resource group comprises a first identifier to identify the virtual machine and a second identifier to identify the pass-through disk.

18. The processing device of claim 15 , wherein when the virtualization software logically attaches the pass-through disk to the virtual machine, the virtualization software is configured to add the disk resource to the temporary resource group and logically attach the storage device to a virtual storage controller on the host machine, wherein the virtual storage controller is owned by the virtual machine.

19. The processing device of claim 15 , wherein the instructions further cause the processing device to:

move the disk resource from the temporary resource group to a virtual machine resource group; and

delete the temporary resource group.

20. The processing device of claim 19 , wherein the instructions further cause the processing device to:

notify the virtual machine that the pass-through disk is available.