Disk snapshot size

[rsmontero]

Description When a new snapshot is created the current SIZE of the associated disk is used:

• To compute new quota usage
• To set the size of the snapshot it self

This may not be accurate when:

1. The disk is resized
2. The disk is reverted to a previous (smaller) snapshot
3. A new snapshot is then taken from this reverted snapshot (as it will use the SIZE set in step 1)

This issue is to review which size is better to use (or if the DISK/SIZE needs to be updated) for create and revert operation. Note that this depends on the snapshot mode.

To Reproduce see above

Expected behavior To be check

Details

• Affected Component: Storage
• Hypervisor: KVM
• Version: all

Additional context Add any other context about the problem here.

Progress Status

• [ ] Code committed
• [ ] Testing - QA
• [ ] Documentation (Release notes - resolved issues, compatibility, known issues)