Automated cloud recovery to provide a full usable application image
A storage array creates snapshots of each of a plurality of devices of a storage group associated with a production device on which active application data is logically stored. Metadata that indicates associations between the snapshots and the devices is stored on cloud storage with the snapshots as a snapset object. A program running on a management station used the snapset metadata to automatically create new devices on which to recover the snapshots on a selected storage array and uses the snapset metadata to cause the snapshots to be automatically written from the cloud storage system to the new devices on the selected storage array.
1. A method for creating and recovering an application image, comprising:
with a storage array:
creating a snapshot of each of a plurality of devices of a storage group associated with a production device on which active application data is logically stored, thereby creating a plurality of the snapshots, each of the snapshots representing device state at a same point in time;
creating metadata that indicates associations between ones of the snapshots and ones of the devices on which the active application data is stored; and
creating a snapset comprising all the snapshots and the metadata;
with a cloud storage system:
storing the snapset;
with a third network node:
using the snapset metadata to automatically create new devices on which to recover the snapshots on a selected storage array; and
using the snapset metadata to cause the snapshots to be automatically written from the cloud storage system to the new devices on the selected storage array.
2. The method of claim 1 wherein creating metadata comprises including storage array ID, storage group UUID, snapshot sizes, snapshot names, snapshot IDs, snapset ID, volume WWNs, and a timestamp.
3. The method of claim 1 wherein creating metadata comprises including a storage group nice name, user provider mount point marker, and original source volume number.
4. The method of claim 1 comprising the third network node sending a command to the cloud storage system to get a catalog of all cloud snapsets stored on the cloud storage system.
5. The method of claim 1 comprising the third network node automatically sending a command to the selected storage array to create a new storage group for the new devices.
6. The method of claim 5 comprising the third network node automatically sending a command to the selected storage array to create the new devices as protected recovery devices that equal in number the devices of the storage group associated with the production device on which active application data is logically stored.
7. The method of claim 6 comprising the third network node automatically sending a command to the selected storage array to unprotect the new devices after the snapshots are written from the cloud storage system to the new devices on the selected storage array.
8. A storage system, comprising:
a storage array configured to create a snapshot of each of a plurality of devices of a storage group associated with a production device on which active application data is logically stored, thereby creating a plurality of the snapshots, each of the snapshots representing device state at a same point in time, the storage array further configured to create metadata that indicates associations between ones of the snapshots and ones of the devices on which the active application data is stored and create a snapset comprising all the snapshots and the metadata;
a cloud storage system configured to store the snapset; and
a third network node configured to use the snapset metadata to automatically create new devices on which to recover the snapshots on a selected storage array and use the snapset metadata to cause the snapshots to be automatically written from the cloud storage system to the new devices on the selected storage array.
9. The storage system of claim 8 wherein the metadata comprises storage array ID, storage group UUID, snapshot sizes, snapshot names, snapshot IDs, snapset ID, volume WWNs, and a timestamp.
10. The storage system of claim 8 wherein the metadata comprises a storage group nice name, user provider mount point marker, and original source volume number.
11. The storage system of claim 8 wherein the third network node is configured to send a command to the cloud storage system to get a catalog of all cloud snapsets stored on the cloud storage system.
12. The storage system of claim 8 wherein the third network node is configured to automatically send a command to the selected storage array to create a new storage group for the new devices.
13. The storage system of claim 12 wherein the third network node is configured to automatically send a command to the selected storage array to create the new devices as protected recovery devices that equal in number the devices of the storage group associated with the production device on which active application data is logically stored.
14. The storage system of claim 13 wherein the third network node is configured to automatically send a command to the selected storage array to unprotect the new devices after the snapshots are written from the cloud storage system to the new devices on the selected storage array.
15. A computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for using a computer system to create and recover an application image, the method comprising:
with a storage array:
creating a snapshot of each of a plurality of devices of a storage group associated with a production device on which active application data is logically stored, thereby creating a plurality of the snapshots, each of the snapshots representing device state at a same point in time;
creating metadata that indicates associations between ones of the snapshots and ones of the devices on which the active application data is stored; and
creating a snapset comprising all the snapshots and the metadata;
with a cloud storage system:
storing the snapset;
with a third network node:
using the snapset metadata to automatically create new devices on which to recover the snapshots on a selected storage array; and
using the snapset metadata to cause the snapshots to be automatically written from the cloud storage system to the new devices on the selected storage array.
16. The computer-readable storage medium of claim 15 wherein creating metadata comprises including storage array ID, storage group UUID, snapshot sizes, snapshot names, snapshot IDs, snapset ID, volume WWNs, and a timestamp.
17. The computer-readable storage medium of claim 15 wherein creating metadata comprises including a storage group nice name, user provider mount point marker, and original source volume number.
18. The computer-readable storage medium of claim 15 comprising the third network node sending a command to the cloud storage system to get a catalog of all cloud snapsets stored on the cloud storage system.
19. The computer-readable storage medium of claim 15 comprising the third network node automatically sending a command to the selected storage array to create a new storage group for the new devices.
20. The computer-readable storage medium of claim 19 comprising the third network node automatically sending a command to the selected storage array to create the new devices as protected recovery devices that equal in number the devices of the storage group associated with the production device on which active application data is logically stored.