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a60fb26
(Get the code!)
@Nikola, the problem is not about device names, but about consistency and workability of volume backed instance snapshots.
Should we support a use case:
1 A user snapshots his volume backed instance which has more than one volume.
2 A user creates a new instance from the snapshot.
3 All services of guest OS work fine.
I think we should, otherwise snapshots of volume backed instances are useless for such instances. But this leads us to need to guarantee the stability of device names in the custom case.
Now we support this use case.
We support a use case:
1 A user creates an instance from volume backed image, adding a new volume.
2 The instance has the additional volume attached.
What about a combined use case:
1 A user snapshots his volume backed instance which has more than one volume.
2 A user creates a new instance from the snapshot, adding a new volume.
3 The instance has the additional volume attached.
4 All services of guest OS work fine.
To have Nova consistent we should support this use case as well. Any objections?
As for fs labels, as i understand they could be usefull from outside only, not from inside an instance (guest OS).