Shared storage model for high availability within cloud environments

Patent metadata

Field	Value
Publication number	US-12267252-B2
Application number	US-202318541762-A
Country	US
Kind code	B2
Filing date	Dec 15, 2023
Priority date	Oct 20, 2018
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

Techniques are provided for a high availability solution (e.g., a network attached storage (NAS) solution) with address preservation during switchover. A first virtual machine is deployed into a first domain and a second virtual machine is deployed into a second domain of a computing environment. The first and second virtual machines are configured as a node pair for providing clients with access to data stored within an aggregate comprising one or more storage structures within shared storage of the computing environment. A load balancer is utilized to manage logical interfaces used by clients to access the virtual machines. During switchover, the load balancer preserves an IP address used to mount and access a data share of the aggregate used by a client.

First claim

What is claimed is:

1. A method executed by one or more processors, comprising:
intercepting a request with a first address corresponding to stored data provided by a primary virtual machine, wherein a logical interface of the primary virtual machine is initialized at a port of a secondary virtual machine, and the secondary virtual machine is configured to monitor access requests for the stored data;
determining that the request is to be routed to a second address of the primary virtual machine when the primary virtual machine is operational; and
utilizing a floating address to route the request to the second address as a routed request that retains the first address as a request destination corresponding to a storage location of the store data.

2. The method of claim 1 , comprising:
configuring the primary virtual machine to store heartbeat information within a primary mailbox corresponding to a disk on a root aggregate.

3. The method of claim 1 , comprising:
configuring primary first virtual machine to mirror NVLOG data over an interconnect to the secondary virtual machine.

4. The method of claim 1 , comprising:
configuring the secondary virtual machine to obtain a SCSI reservation on a mailbox disk of the primary virtual machine based upon the secondary virtual machine determining that the primary virtual machine has failed and a switchover should be performed.

5. The method of claim 4 , comprising:
configuring the secondary virtual machine to assimilate disks of the primary virtual machine as part of performing the switchover.

6. The method of claim 4 , comprising:
configuring the secondary virtual machine to replay NVLOG data of the primary virtual machine as part of performing the switchover.

7. The method of claim 1 , comprising:
configuring the secondary virtual machine to listen to the port for client access requests.

8. A non-transitory machine readable medium comprising instructions for performing a method, which when executed by a machine, causes the machine to:
intercept a request with a first address corresponding to stored data provided by a primary virtual machine, wherein a logical interface of the primary virtual machine is initialized at a port of a secondary virtual machine, and the secondary virtual machine is configured to monitor access requests for the stored data;
determine that the request is to be routed to a second address of the primary virtual machine when the primary virtual machine is operational; and
utilize a floating address to route the request to the second address as a routed request that retains the first address as a request destination corresponding to a storage location of the store data.

9. The non-transitory machine readable medium of claim 8 , wherein the instructions cause the machine to:
configure the primary virtual machine to store heartbeat information within a primary mailbox corresponding to a disk on a root aggregate.

10. The non-transitory machine readable medium of claim 8 , wherein the instructions cause the machine to:
configure primary first virtual machine to mirror NVLOG data over an interconnect to the secondary virtual machine.

11. The non-transitory machine readable medium of claim 8 , wherein the instructions cause the machine to:
configure the secondary virtual machine to obtain a SCSI reservation on a mailbox disk of the primary virtual machine based upon the secondary virtual machine determining that the primary virtual machine has failed and a switchover should be performed.

12. The non-transitory machine readable medium of claim 11 , wherein the instructions cause the machine to:
configure the secondary virtual machine to assimilate disks of the primary virtual machine as part of performing the switchover.

13. The non-transitory machine readable medium of claim 11 , wherein the instructions cause the machine to:
configure the secondary virtual machine to replay NVLOG data of the primary virtual machine as part of performing the switchover.

14. The non-transitory machine readable medium of claim 9 , wherein the instructions cause the machine to:
configure the secondary virtual machine to listen to the port for client access requests.

15. A computing device, comprising:
a memory comprising instructions; and
a processor coupled to the memory, the processor configured to execute the instructions to cause the processor to:
intercept a request with a first address corresponding to stored data provided by a primary virtual machine, wherein a logical interface of the primary virtual machine is initialized at a port of a secondary virtual machine, and the secondary virtual machine is configured to monitor access requests for the stored data;
determine that the request is to be routed to a second address of the primary virtual machine when the primary virtual machine is operational; and
utilize a floating address to route the request to the second address as a routed request that retains the first address as a request destination corresponding to a storage location of the store data.

16. The computing device of claim 15 , wherein the instructions cause the processor to:
configure the primary virtual machine to store heartbeat information within a primary mailbox corresponding to a disk on a root aggregate.

17. The computing device of claim 15 , wherein the instructions cause the processor to:
configure primary first virtual machine to mirror NVLOG data over an interconnect to the secondary virtual machine.

18. The computing device of claim 15 , wherein the instructions cause the processor to:
configure the secondary virtual machine to obtain a SCSI reservation on a mailbox disk of the primary virtual machine based upon the secondary virtual machine determining that the primary virtual machine has failed and a switchover should be performed.

19. The computing device of claim 18 , wherein the instructions cause the processor to:
configure the secondary virtual machine to assimilate disks of the primary virtual machine as part of performing the switchover.

20. The computing device of claim 18 , wherein the instructions cause the processor to:
configure the secondary virtual machine to replay NVLOG data of the primary virtual machine as part of performing the switchover.

Assignees

• Netapp Inc

Inventors

• Busick Christopher
• Rajaraman Rajesh
• Silva James

Classifications

• H04L41/0668

  by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure · CPC title

• G06F2213/0036

  Small computer system interface [SCSI] · CPC title

• G06F2009/4557

  Distribution of virtual machine instances; Migration and load balancing · CPC title

• G06F13/4221 Primary

  being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus · CPC title

• G06F9/45558

  Hypervisor-specific management and integration aspects · CPC title