PLACING A STORAGE NETWORK DEVICE INTO A MAINTENANCE MODE IN A VIRTUALIZED COMPUTING ENVIRONMENT

• US 20150153964A1
• Filed: 01/16/2014
• Published: 06/04/2015
• Est. Priority Date: 12/03/2013
• Status: Active Grant

• Current Assignee: Vmware LLC (Broadcom, Inc.)
• Original Assignee: VMware, Inc. (Broadcom, Inc.)
• Inventors: Antony, Jinto, Thankappan, Sudhish Panamthanath
• Granted Patent: US 9,164,695 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0647 Migration mechanisms
• CPC Class Codes: G06F 3/0655 Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0683 Plurality of storage devices
• CPC Class Codes: G06F 9/45533 Hypervisors; Virtual machine monitors
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects

Abstract

Techniques for placing a first storage network device into maintenance mode in a virtualized computing environment in which each data store is connected to at least one host computing system via a storage network device are described. In one embodiment, a first data store having an active input/output (I/O) path to a first host computing system via the first storage network device is identified. Further, migration of virtual machine disks (VMDKs) on the first data store and/or migration of workloads running on the first host computing system are recommended such that the VMDKs can be accessed by the workloads via any other storage network device.

Claims

1. An automated method of placing a first storage network device into a maintenance mode in a virtualized computing environment in which each data store is connected to at least one host computing system via a storage network device, comprising:

identifying a first data store having an active input/output (I/O) path to a first host computing system via the first storage network device; and

migrating at least one of virtual machine disks (VMDKs) on the first data store and workloads running on the first host computing system such that the VMDKs can he accessed by the workloads via any other storage network device.

2. The method of claim 1, further comprising:

determining whether there is any other active I/O path via the first storage network device;

if so, repeating the steps of identifying, migrating, and determining for a next active I/O path via the first storage network device; and

if not, placing the first storage network device into the maintenance mode;

3. The method of claim 1, wherein migrating at least one of the VMDKs on the first data store and the workloads running on the first host computing system, comprises:

determining whether at least one of the first data store and the first host computing system is connected to any other storage network device; and

if the first host computing system is not coupled to any other storage network device and the first data store is coupled to a second storage network device, migrating the workloads running on the first host computing system to at least one other host computing system coupled to the second storage network device such that the VMDKs can be accessed by the workloads via the second storage network device.

4. The method of claim 3, further comprising:

if the first data store is not coupled to any other storage network device and the first host computing system is coupled to a third storage network device, migrating the VMDKs on the first data store to at least one other data store coupled to the third storage network device such that the VMDKs can be accessed by the workloads via the third storage network device.

5. The method of claim 3, further comprising:

if the first host computing system and the first data store are not coupled to any other storage network device, migrating the workloads running on the first host computing system to at least one other host computing system and the VMDKs on the first data store to at least one other data store such that the VMDKs can be accessed by the workloads via any other storage network device.

6. The method of claim 3, further comprising:

if the first host computing system is coupled to a fourth storage network device and the first data store is coupled to a fifth storage network device, performing one of;

migration of the VMDKs on the first data store to at least one other data store coupled to the fourth storage network device such that the VMDKs can be accessed by the workloads via the fourth storage network device; and

migration of the workloads running on the first host computing system to at least one other host computing system coupled to the fifth storage network device such that the VMDKs can be accessed by the workloads via, the fifth storage network device.

7. The method of claim 1, further comprising exiting the maintenance mode of the first storage network device, comprising:

identifying data stores coupled to host computing systems via the first storage network device; and

balancing the I/O traffic by migration of migrating at least one of VMDKs on the data stores and workloads running on the host computing systems such that the VMDKs can be accessed by the workloads via the first storage network device.

8. The method of claim 1, wherein the storage network device comprises a switch selected from the group consisting of a fibre channel (FC) switch, Ethernet switch, and FC over Ethernet (FCoE) switch.

9. The method of claim 1, wherein the first storage network device is placed into the maintenance mode for at least one of replacement, hardware upgrade, and software upgrade of the first storage network device.

10. A system comprising:

a plurality of storage network devices;

a plurality of host computing systems;

a plurality of data stores, wherein each data store is coupled to at least one of the host computing systems via one of the plurality of storage network devices; and

a management server comprising a switch maintenance module to automatically place a first storage network device into a maintenance mode in a virtualized computing environment, by;

identifying a first data store having an active input/output (I/O) path to a first host computing system via the first storage network device; and

migrating at least one of virtual machine disks (VMDKs) on the first data store and workloads running on the first host computing system such that the VMDKs can be accessed by the workloads via any other storage network device.

11. The system of claim 10, wherein the switch maintenance module is further configured to:

determine whether there is any other active I/O path via the first storage network device;

if so, repeat the steps of identifying, migrating and determining for a next active I/O path via the first storage network device; and

if not, place the first storage network device into the maintenance mode.

12. The system of claim 10, wherein the switch maintenance module is further configured to:

determine whether at least one of the first data store and the first host computing system is connected to any other storage network device;

if the first host computing system is not coupled to any other storage network device and the first data store is coupled to a second storage network device, migrate the workloads running on the first host computing system to at least one other host computing system coupled to the second storage network device such that the VMDKs can he accessed by the workloads via the second storage network device.

13. The system of claim 12, wherein the switch maintenance module is further configured to:

if the first data store is not coupled to any other storage network device and the first host computing system is coupled to a third storage network device, migrate the VMDKs on the first data store to at least one other data store coupled to the third storage network device such that the VMDKs can be accessed by the workloads via the third storage network device.

14. The system of claim 12, wherein the switch maintenance module is further configured to:

if the first host computing system and the first data store are not coupled to any other storage network device, migrate of the workloads running on the first host computing system to at least one other host computing system and the VMDKs on the first data store to at least one other data store such that the VMDKs can be accessed by the workloads via any other storage network device.

15. The system of claim 12, wherein the switch maintenance module is further configured to:

if the first host computing system is coupled to a fourth storage network device and the first data store is coupled to a fifth storage network device, perform one of;

migration of the VMDKs on the first data store to at least one other data store coupled to the fourth storage network device such that the VMDKs can he accessed by the workloads via the fourth storage network device; and

migration of the workloads running on the first host computing system to at least one other host computing system coupled to the fifth storage network device such that the VMDKs can be accessed by the workloads via the fifth storage network device.

16. The system of claim 10, wherein the switch maintenance module exits the maintenance mode of the first storage network device, by:

identifying data stores coupled to host computing systems via the first storage network de ice; and

balancing the I/O traffic by migrating at least one of VMDKs on the data stores and workloads running on the host computing systems such that the VMDKs can be accessed by the workloads via the first storage network device.

17. A non-transitory computer-readable storage medium including instructions that are configured, when executed by a computing system, to perform a method of placing a first storage network device into a maintenance mode in a virtualized computing environment in which each data store is connected to at least one host computing system via a storage network device, the method comprising:

identifying a first data store having an active input/output (I/O) path to a first host computing system via the first storage network device; and

migrating at least one of virtual machine disks (VMDKs) on the first data store and workloads running on the first host computing system such that the VMDKs can be accessed by the workloads via any other storage network device.

18. The non-transitory computer-readable storage medium of claim 17, further comprising:

determining whether there is any other active I/O path via the first storage network device;

if so, repeating the steps of identifying, migrating and determining for a next active I/O path via the first storage network device; and

if not, placing the first storage network device into the maintenance mode.

19. The non-transitory computer-readable storage medium of claim 17, wherein migrating at least one of VMDKs on the first data store and workloads running on the first host computing system, comprises:

determining whether at least one of the first data store and the first host computing system is connected to any other storage network device; and

if the first host computing system is not coupled to any other storage network device and the first data store is coupled to a second storage network device, migrating the workloads running on the first host computing system to at least one other host computing system coupled to the second storage network device such that the VMDKs can be accessed by the workloads via the second storage network device.

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

if the first host computing system and the first data store are not coupled to any other storage network device, migrating the workloads running on the first host computing system to at least one other host computing system and the VMDKs on the first data store to at least one other data store such that the VMDKs can be accessed by the workloads via any other storage network device.

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

if the first host computing system is coupled to a fourth storage network device and the first data store is coupled to a fifth storage network device, performing one of;

migration of the VMDKs on the first data store to at least one other data store coupled to the fourth storage network device such that the VMDKs can be accessed by the workloads via the fourth storage network device; and

migration of the workloads running on the first host computing system to at least one other host computing system coupled to the fifth storage network device such that the VMDKs can be accessed by the workloads via the fifth storage network device.

23. The non-transitory computer-readable storage medium of claim 17, further comprising exiting the maintenance mode of the first storage network device, comprising:

identifying data stores coupled to host computing systems via the first storage network device; and

balancing the I/O traffic by migrating at least one of VMDKs on the data stores and workloads running on the host computing systems such that the VMDKs can be accessed by the workloads via the first storage network device.

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

if the first data store is not coupled to any other storage network device and the first host computing system is coupled to a third storage network device, migrating the VMDKs on the first data store to at least one other data store coupled to the third storage network device such that the VMDKs can be accessed by the workloads via the third storage network device.