Add nova vms backup support

Registered by Fausto Marzi

Freezer has to be able to backup VM instances from Nova/Glance.

Implementation thoughts:
- Create vm snapshot
- Retrieve the file from Glance
- In stream, download the file in blocks, compress it, encrypt it
- Upload the backup in stream to Swift

Blueprint information

Status:
Not started
Approver:
Fabrizio Fresco
Priority:
Undefined
Drafter:
Fausto Marzi
Direction:
Needs approval
Assignee:
None
Definition:
Approved
Series goal:
None
Implementation:
Unknown
Milestone target:
None

Related branches

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bp/nova-vm-backup,n,z

Addressed by: https://review.openstack.org/185425
    Implementation of nova instance backups

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Work Items

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