Updating a virtual machine backup

1. A method, comprising:

discovering one or more new security vulnerabilities associated with a plurality of virtual machines after a plurality of virtual machine disk image file backups have been stored on a backup storage of a storage system;

based on a backup update policy, selecting, by the storage system, a virtual machine disk image file backup that includes at least one of the one or more new security vulnerabilities among the plurality of virtual machine disk image file backups stored on the backup storage of the storage system;

mounting a version of the selected virtual machine disk image file backup;

selecting one or more of a plurality of virtual machine updates stored at an update repository to apply to the version of the selected virtual machine disk image file backup based on the backup update policy, wherein the backup update policy indicates which of the plurality of virtual machine updates are to be applied to the selected virtual machine disk image file backup;

based on the backup update policy, applying, by the storage system, the one or more selected virtual machine updates to the mounted version of the selected virtual machine disk image file backup to at least in part resolve the at least one of the one or more new security vulnerabilities that was discovered after the selected virtual machine disk image file backup was backed up from a source system to the backup storage of the storage system without restoring the selected virtual machine disk image file backup; and

storing the updated version of the selected virtual machine disk image file backup.

2. The method of claim 1 , wherein selecting the virtual machine disk image file backup among the plurality of virtual machine disk image file backups comprises applying the backup update policy to information associated with the virtual machine disk image file backup.

3. The method of claim 2 , wherein the backup update policy indicates the virtual machine disk image file backup is to be updated in response to determining that the version of the virtual machine disk image file backup is a latest version of a virtual machine backup.

4. The method of claim 2 , wherein the backup update policy indicates the virtual machine disk image file backup is to be updated in response to determining that the information associated with the virtual machine disk image file backup indicates the virtual machine disk image file backup lacks one or more critical updates.

5. The method of claim 2 , wherein selecting the virtual machine disk image file backup among the plurality of virtual machine disk image file backups further comprises determining that the backup update policy indicates to update the virtual machine disk image file backup.

6. The method of claim 1 , wherein the version of the selected virtual machine disk image file backup is a cloned version of the virtual machine disk image file backup.

7. The method of claim 1 , wherein mounting the version of the selected virtual machine disk image file backup includes setting an apparent root of a file system namespace to be a root of a virtual machine associated with the selected virtual machine disk image file backup.

8. The method of claim 1 , wherein the update repository stores one or more updates for one or more non-selected virtual machine disk image file backups stored on the backup storage of the storage system.

9. The method of claim 1 , wherein the updated version of the selected virtual machine disk image file backup is included in a catalog of available virtual machine disk image file backups.

10. The method of claim 1 , further comprising receiving a request to restore a virtual machine associated with the selected virtual machine disk image file backup to a primary system.

11. The method of claim 10 , further comprising restoring the selected virtual machine disk image file backup to the primary system.

12. The method of claim 1 , further comprising providing an indication of an original version of the selected virtual machine disk image file backup and the updated version of the selected virtual machine disk image file backup.

13. The method of claim 12 , further comprising:

receiving a selection between the original version of the selected virtual machine disk image file backup and the updated version of the selected virtual machine disk image file backup; and

providing the selected version of the selected virtual machine disk image file backup.

14. A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:

discovering one or more new security vulnerabilities associated with a plurality of virtual machines after a plurality of virtual machine disk image file backups have been stored on a backup storage of a storage system;

based on a backup update policy, selecting, by the storage system, a virtual machine disk image file backup that includes at least one of the one or more new security vulnerabilities among the plurality of virtual machine disk image file backups stored on the backup storage of the storage system;

mounting a version of the selected virtual machine disk image file backup;

selecting one or more of a plurality of virtual machine updates stored at an update repository to apply to the version of the selected virtual machine disk image file backup based on the backup update policy, wherein the backup update policy indicates which of the plurality of virtual machine updates are to be applied to the selected virtual machine disk image file backup;

based on the backup update policy, applying, by the storage system, the one or more selected virtual machine updates to the mounted version of the selected virtual machine disk image file backup to at least in part resolve the at least one of the one or more new security vulnerabilities that was discovered after the selected virtual machine disk image file backup was backed up from a source system to the backup storage of the storage system without restoring the selected virtual machine disk image file backup; and

storing the updated version of the selected virtual machine disk image file backup.

15. The computer program product of claim 14 , wherein selecting the virtual machine disk image file backup among the plurality of virtual machine disk image file backups comprises applying the backup update policy to information associated with the virtual machine disk image file backup.

16. The computer program product of claim 15 , wherein selecting the virtual machine disk image file backup among the plurality of virtual machine disk image file backups further comprises determining that the backup update policy indicates to update the virtual machine disk image file backup.

17. The computer program product of claim 15 , wherein the backup update policy indicates the virtual machine disk image file backup is to be updated in response to determining that the information associated with the virtual machine disk image file backup indicates the virtual machine disk image file backup lacks one or more critical updates.

18. The computer program product of claim 14 , wherein the updated version of the selected virtual machine disk image file backup is included in a catalog of available virtual machine disk image file backups.

19. The computer program product of claim 14 , further comprising restoring the selected virtual machine disk image file backup to a primary system.

20. A storage system, comprising:

a processor; and

a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions which when executed cause the processor to:

discover one or more new security vulnerabilities associated with a plurality of virtual machines after a plurality of virtual machine disk image file backups have been stored on a backup storage of a storage system;

based on a backup update policy, select a virtual machine disk image file backup that includes at least one of the one or more new security vulnerabilities among the plurality of virtual machine disk image file backups stored on the backup storage of the storage system;

mount a version of the selected virtual machine disk image file backup;

select one or more of a plurality of virtual machine updates stored at an update repository to apply to the version of the selected virtual machine disk image file backup based on the backup update policy, wherein the backup update policy indicates which of the plurality of virtual machine updates are to be applied to the selected virtual machine disk image file backup;

based on the backup update policy, apply the one or more selected virtual machine updates to the mounted version of the selected virtual machine disk image file backup to at least in part resolve the at least one of the one or more new security vulnerabilities that was discovered after the selected virtual machine disk image file backup was backed up from a source system to the backup storage of the storage system without restoring the selected virtual machine disk image file backup; and

store the updated version of the selected virtual machine disk image file backup.