Open Stack

I deployed a single node devstack on Ubuntu 14.04.
This devstack belongs to Juno.

1) git clone https://github.com/openstack-dev/devstack.git
2)cd devstack
3)vi local.conf

[[local|localrc]]

ADMIN_PASSWORD=some_password
DATABASE_PASSWORD=$ADMIN_PASSWORD
RABBIT_PASSWORD=$ADMIN_PASSWORD
SERVICE_PASSWORD=$ADMIN_PASSWORD
SERVICE_TOKEN=ADMIN
#FLAT_INTERFACE = eth0
FIXED_RANGE=192.168.2.80/29
#FLOATING_RANGE=192.168.20.0/25
HOST_IP=192.168.2.64
LOGFILE=$DEST/logs/stack.sh.log
SCREEN_LOGDIR=$DEST/logs/screen
SYSLOG=True
SYSLOG_HOST=$HOST_IP
SYSLOG_PORT=516
RECLONE=yes
CINDER_ENABLED_BACKENDS=client:client_driver

[[post-config|$CINDER_CONF]]

[client_driver]
volume_driver=cinder.volume.drivers.san.client.iscsi.client_iscsi.ClientISCSIDriver
san_ip = 192.168.2.192
san_login = some_name
san_password =some_password
client_iscsi_ips = 192.168.2.193

4)./stack.sh

5)
I am running below test:
cd /opt/stack/tempest
./run_tempest.sh tempest.api.volume


But some tests are failed.Manually i am able to perform all volume operations.
Can any one tell where am i wrong?
Below is portion of failed test :

======================================================================
FAIL: tempest.api.volume.test_volumes_snapshots.VolumesSnapshotTestXML.test_volume_from_snapshot[gate]
----------------------------------------------------------------------
Traceback (most recent call last):
_StringException: Empty attachments:
  stderr
  stdout

pythonlogging:'': {{{
2014-07-28 12:01:41,514 3278 INFO     [tempest.common.rest_client]
Request (VolumesSnapshotTestXML:test_volume_from_snapshot): 200 POST
http://192.168.2.64:8776/v1/eea01c797b0c4df7b1ead18038697a2e/snapshots
0.117s
2014-07-28 12:01:41,569 3278 INFO     [tempest.common.rest_client]
Request (VolumesSnapshotTestXML:test_volume_from_snapshot): 200 GET
http://192.168.2.64:8776/v1/eea01c797b0c4df7b1ead18038697a2e/snapshots/20d0f8ad-9b5b-49f4-a37e-34b762bd0ca7
0.054s
2014-07-28 12:01:43,621 3278 INFO     [tempest.common.rest_client]
Request (VolumesSnapshotTestXML:test_volume_from_snapshot): 200 GET
http://192.168.2.64:8776/v1/eea01c797b0c4df7b1ead18038697a2e/snapshots/20d0f8ad-9b5b-49f4-a37e-34b762bd0ca7
0.049s
}}}

Traceback (most recent call last):
  File "/opt/stack/tempest/tempest/api/volume/test_volumes_snapshots.py",
line 181, in test_volume_from_snapshot
    snapshot = self.create_snapshot(self.volume_origin['id'])
  File "/opt/stack/tempest/tempest/api/volume/base.py", line 106, in
create_snapshot
    'available')
  File "/opt/stack/tempest/tempest/services/volume/xml/snapshots_client.py",
line 136, in wait_for_snapshot_status
    value = self._get_snapshot_status(snapshot_id)
  File "/opt/stack/tempest/tempest/services/volume/xml/snapshots_client.py",
line 109, in _get_snapshot_status
    snapshot_id=snapshot_id)
SnapshotBuildErrorException: Snapshot
20d0f8ad-9b5b-49f4-a37e-34b762bd0ca7 failed to build and is in ERROR
status


Ran 246 tests in 4149.523s

FAILED (failures=10)