Can't attach volume to instance via api

[Ilya Bumarskov]

Detailed bug description:
Fuel ISO 9.0 #299 with Mitaka release.
 Volume can't be attached to instance properly using novaclient Python API.

Steps to reproduce:
 Use novaclient Python API to create volume and attach it to instance. Here is a code example:

def attach_volume(self, volume, server, mount='/dev/vdb'):
        self.cinder.volumes.attach(volume, server.id, mount)
        return self.cinder.volumes.get(volume.id)

Expected results:
 Volume status is 'in-use' and attached to instance.

Actual result:
 Volume has 'in-use' status, but instance doesn't have attached volume (see the screenshots).

Workaround:
 Use UI or CLI for attaching volumes.

[Timur Nurlygayanov (tnurlygayanov)]

This bug affects only users who will use python client to attach volumes, we can't reproduce it via Horizon or CLI (and it is strange).

[Timur Nurlygayanov (tnurlygayanov)]

Probably the reason of this fail in incorrect parameters for new volume?

[Yuriy Nesenenko (ynesenenko)]

The description says that you are using novaclient Python API, but in fact, in the example function attach_volume(...) used cinderclient Python API. The method cinder.volumes.attach(volume, server.id, mount) just sets attachment metadata. For clarity, we present the results of taken actions http://paste.openstack.org/show/496685/