ORCHESTRATED DISASTER RECOVERY

• US 20170060975A1
• Filed: 08/25/2015
• Published: 03/02/2017
• Est. Priority Date: 08/25/2015
• Status: Active Grant

• Current Assignee: Kyndryl Incorporated
• Original Assignee: International Business Machines Corporation
• Inventors: AKYUREKLIER, Ozan A., ARORA, Ramandeep S., HARPER, Richard Edwin
• Granted Patent: US 10,423,588 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/2028 eliminating a faulty processor or activating a spare
• CPC Class Codes: G06F 11/2035 without idle spare hardware
• CPC Class Codes: G06F 11/2048 where the redundant components share neither address space nor persistent storage
• CPC Class Codes: G06F 11/2097 maintaining the standby controller/processing unit updated initialisation or re-synchronisation thereof G06F11/1658 and subgroups
• CPC Class Codes: G06F 16/184 implemented as replicated file system

Abstract

Orchestrated disaster recovery is provided in which replication volumes are automatically configured as part of a failover procedure. An example method includes obtaining replication volume configuration information identifying configuration of a replication volume in a data replication relationship in which data is replicated from a replication source to a replication target. The replication volume is configured for the replication source and replication volume remains at least partially non-configured for the replication target during data replication from the replication source to the replication target. Based on an indication of failover, the obtained configuration information is used in automatically configuring the replication volume for the replication target in preparation for use by application(s) of the replication target site. Automatically configuring includes configuring, for the replication volume, a volume group and a mount point.

Claims

1. A method for automatically configuring replication volumes as part of a failover procedure, the method comprising:

obtaining replication volume configuration information identifying configuration of at least one replication volume in a data replication relationship in which data is replicated from a replication source to a replication target, wherein the at least one replication volume is configured for the replication source and the at least one replication volume remains at least partially non-configured for the replication target during data replication from the replication source to the replication target; and

based on an indication of failover from a replication source site to a replication target site, automatically configuring, using the obtained replication volume configuration information, the at least one replication volume for the replication target in preparation for use by an application of the replication target site, the automatically configuring including configuring, for the at least one replication volume, at least one volume group and at least one mount point.

2. The method of claim 1, wherein configuring the at least one volume group comprises configuring for the replication target a volume group having one or more storage devices and configuring one or more mount points of the volume group.

3. The method of claim 1, wherein configuring the at least one mount point comprises configuring a name, file system, size, and permission options of the at least one mount point.

4. The method of claim 1, further comprising:

determining, as part of the configuring the at least one mount point, whether mounting a mount point of the at least one mount point presents a conflict with an existing mount point of the replication target site; and

based on determining that mounting the mount point presents a conflict, automatically unmounting the existing mount point and mounting the mount point.

5. The method of claim 1, wherein the obtained replication volume configuration information comprises a partial identifier of a storage device of the replication target, and wherein the using the obtained replication volume configuration information comprises:

obtaining, from the obtained replication volume configuration information, the partial identifier of the storage device;

querying an operating system of the replication target site to identify a full identifier for the storage device;

using the full identifier for the storage device to obtain a disk name for the storage device; and

using the disk name to configure a volume group of the at least one volume group.

6. The method of claim 1, wherein obtaining the replication volume configuration information comprises obtaining the replication volume configuration information from the replication source site, the replication volume configuration information being built by a component of the replication source site.

7. The method of claim 6, wherein the replication volume configuration information is built based on pairing information obtained at least partially from a repository storing replication relationships.

8. The method of claim 7, wherein on the basis of the pairing information, configuration of at least one storage device of the replication source site is ignored in building the replication volume configuration information.

9. The method of claim 7, wherein the pairing information identifies a replication source storage device and replication target storage device, wherein the replication volume configuration information comprises volume group, logical volume, and mount point information, including file system, size, permission, and automount information, about the replication source storage device, and wherein the automatically configuring the at least one replication volume for the replication target based on the failover configures the at least one replication volume using the volume group, logical volume, and mount point information.

10. The method of claim 1, wherein the replication source site comprises a plurality of primary virtual machines and the replication target site comprises a plurality of corresponding secondary virtual machines to which the failover is to occur, wherein the replication volume configuration information comprises replication volume configuration information specific to each primary virtual machine of the plurality of primary virtual machines, and wherein the automatically configuring the at least one replication volume for the replication target comprises automatically configuring on each secondary virtual machine of the plurality of secondary virtual machines a respective at least one volume group and at least one mount point of a corresponding primary virtual machine of the plurality of primary virtual machines.

11. A computer system comprising:

a memory; and

a processor in communications with the memory, wherein the computer system is configured to perform a method, the method comprising;

obtaining replication volume configuration information identifying configuration of at least one replication volume in a data replication relationship in which data is replicated from a replication source to a replication target, wherein the at least one replication volume is configured for the replication source and the at least one replication volume remains at least partially non-configured for the replication target during data replication from the replication source to the replication target; and

based on an indication of failover from a replication source site to a replication target site, automatically configuring, using the obtained replication volume configuration information, the at least one replication volume for the replication target in preparation for use by an application of the replication target site, the automatically configuring including configuring, for the at least one replication volume, at least one volume group and at least one mount point.

12. The computer system of claim 11, wherein configuring the at least one volume group comprises configuring for the replication target a volume group having one or more storage devices and configuring one or more mount points of the volume group.

13. The computer system of claim 11, wherein configuring the at least one mount point comprises configuring a name, file system, size, and permission options of the at least one mount point.

14. The computer system of claim 11, wherein the method further comprises:

determining, as part of the configuring the at least one mount point, whether mounting a mount point of the at least one mount point presents a conflict with an existing mount point of the replication target site; and

based on determining that mounting the mount point presents a conflict, automatically unmounting the existing mount point and mounting the mount point.

15. The computer system of claim 11, wherein the obtained replication volume configuration information comprises a partial identifier of a storage device of the replication target, and wherein the using the obtained replication volume configuration information comprises:

obtaining, from the obtained replication volume configuration information, the partial identifier of the storage device;

querying an operating system of the replication target site to identify a full identifier for the storage device;

using the full identifier for the storage device to obtain a disk name for the storage device; and

using the disk name to configure a volume group of the at least one volume group.

16. The computer system of claim 11, wherein obtaining the replication volume configuration information comprises obtaining the replication volume configuration information from the replication source site, the replication volume configuration information being built by a component of the replication source site, and wherein the replication volume configuration information is built based on pairing information obtained at least partially from a repository storing replication relationships.

17. The computer system of claim 16, wherein the pairing information identifies a replication source storage device and replication target storage device, wherein the replication volume configuration information comprises volume group, logical volume, and mount point information, including file system, size, permission, and automount information, about the replication source storage device, and wherein the automatically configuring the at least one replication volume for the replication target based on the failover configures the at least one replication volume using the volume group, logical volume, and mount point information.

18. A computer program product comprising:

a computer readable storage medium readable by a processor and storing instructions for execution by the processor for performing a method comprising;

obtaining replication volume configuration information identifying configuration of at least one replication volume in a data replication relationship in which data is replicated from a replication source to a replication target, wherein the at least one replication volume is configured for the replication source and the at least one replication volume remains at least partially non-configured for the replication target during data replication from the replication source to the replication target; and

based on an indication of failover from a replication source site to a replication target site, automatically configuring, using the obtained replication volume configuration information, the at least one replication volume for the replication target in preparation for use by an application of the replication target site, the automatically configuring including configuring, for the at least one replication volume, at least one volume group and at least one mount point.

19. The computer program product system of claim 18, wherein configuring the at least one volume group comprises configuring for the replication target a volume group having one or more storage devices and configuring one or more mount points of the volume group, and wherein configuring the at least one mount point comprises configuring a name, file system, size, and permission options of the at least one mount point.

20. The computer program product of claim 18, wherein the method further comprises:

determining, as part of the configuring the at least one mount point, whether mounting a mount point of the at least one mount point presents a conflict with an existing mount point of the replication target site; and

based on determining that mounting the mount point presents a conflict, automatically unmounting the existing mount point and mounting the mount point.