Launchpad Entry: clone-volume
Created: 2011-4-19
Contributors: Kazutaka Morita
Summary
Create a new volume from a snapshot with the EC2 api
Release Note
This adds support for "--snapshot" option of euca-create-volume, and enable us to create a new volume from a existing snapshot volume.
Rationale
It is useful for hosting companies to create lots of same volumes from one golden snapshot.
User stories
- User can create a same volume instantly from a golden snapshot.
- User can create a new image from a backuped snapshot volume.
$ euca-describe-snapshots SNAPSHOT snap-00000001 vol-00000001 available 2011-04-19T20:18:19Z 100% $ euca-create-volume -z 0 --snapshot snap-00000001 VOLUME vol-00000002 4 snap-00000001 creating (admin, None, None, None) 2011-04-19T20:53:46Z $ euca-describe-volumes VOLUME vol-00000001 4 nova available (admin, lucid64, None, None) 2011-04-19T20:18:10Z VOLUME vol-00000002 4 snap-00000001 nova available (admin, lucid64, None, None) 2011-04-19T20:53:46Z
Assumptions
A backend storage of nova-volume must support snapshotting.
Implementation
This adds a new column 'snapshot_id' to the table 'volumes' in the database
snapshot_id = Column('snapshot_id', Integer())