Cannot attach volumes to instances if using NexentaStor driver

It looks like the bug #871278 is still present in NexentaStor driver.

I'm using Ubuntu 12.04.1 64bit with cinder-volumes package 2012.2-0ubuntu2~cloud0 and if I try to attach cinder volume to an instance, it fails with the following error in nova-compute.log:

2012-12-05 16:10:26 TRACE Error: iSCSI device not found at /dev/disk/by-path/ip-10.1.0.2:3260-iscsi-iqn.1986-03.com.sun:02:cinder-volume-0000001-lun-1

However the file /dev/disk/by-path/ip-10.1.0.2:3260-iscsi-iqn.1986-03.com.sun:02:cinder-volume-0000001-lun-0 exists.

So if I do

ln -s /dev/disk/by-path/ip-10.1.0.2:3260-iscsi-iqn.1986-03.com.sun:02:cinder-volume-0000001-lun-0 /dev/disk/by-path/ip-10.1.0.2:3260-iscsi-iqn.1986-03.com.sun:02:cinder-volume-0000001-lun-1

everything works.

I fixed it by changing line 232 in

/usr/share/pyshared/cinder/volume/nexenta/volume.py

from

'lun': '0'})

 to

'lun': '1'})