thin provisioned LVM storage got broken

[Jianghua Wang]

The commit
http://git.openstack.org/cgit/openstack/cinder/tree/cinder/brick/local_dev/lvm.py?id=b3c7fab54a57185f5bfb3b95aedbf266fac132e1 is now skipping setting "-k n" for thin provisioned LVM storage.

But it seems will break thin provisioned LVM storage.

http://dd6b71949550285df7dc-dda4e480e005aaa13ec303551d2d8155.r49.cf1.rackcdn.com/56/475256/10/check/dsvm-tempest-neutron-network/84380e0/logs/etc/cinder/cinder.conf.txt.gz
lvm_type = thin => thin provision is configured.

http://dd6b71949550285df7dc-dda4e480e005aaa13ec303551d2d8155.r49.cf1.rackcdn.com/56/475256/10/check/dsvm-tempest-neutron-network/84380e0/
==============================
Failed 1 tests - output below:
==============================

tempest.api.compute.servers.test_device_tagging.DeviceTaggingTestV2_42.test_device_tagging[id-a2e65a6c-66f1-4442-aaa8-498c31778d96,image,network,volume]
--------------------------------------------------------------------------------------------------------------------------------------------------------

Captured traceback:
~~~~~~~~~~~~~~~~~~~
    Traceback (most recent call last):
      File "tempest/test.py", line 96, in wrapper
        return f(self, *func_args, **func_kwargs)
      File "tempest/api/compute/servers/test_device_tagging.py", line 204, in test_device_tagging
        'boot_index': 2
      File "tempest/api/compute/base.py", line 222, in create_test_server
        **kwargs)
      File "tempest/common/compute.py", line 219, in create_test_server
        server['id'])
      File "/opt/stack/new/tempest/.tox/tempest/local/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
        self.force_reraise()
      File "/opt/stack/new/tempest/.tox/tempest/local/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
        six.reraise(self.type_, self.value, self.tb)
      File "tempest/common/compute.py", line 188, in create_test_server
        clients.servers_client, server['id'], wait_until)
      File "tempest/common/waiters.py", line 76, in wait_for_server_status
        server_id=server_id)
    tempest.exceptions.BuildErrorException: Server 8d3a9ebc-7602-41cc-b195-a738ce90893c failed to build and is in ERROR status
    Details: {u'message': u'Build of instance 8d3a9ebc-7602-41cc-b195-a738ce90893c aborted: Block Device Mapping is Invalid.', u'code': 500, u'created': u'2017-07-03T06:36:46Z'}

[Jianghua Wang (wjh-fresh)]

Errors in cinder-volume log:
http://dd6b71949550285df7dc-dda4e480e005aaa13ec303551d2d8155.r49.cf1.rackcdn.com/56/475256/10/check/dsvm-tempest-neutron-network/84380e0/logs/screen-c-vol.txt.gz

/etc/cinder/rootwrap.conf tgt-admin --show" returned: 0 in 0.440s {{(pid=16677) execute /usr/local/lib/python2.7/dist-packages/oslo_concurrency/processutils.py:385}}
Jul 03 06:36:23.981945 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager [None req-641a9f45-2db6-4c61-8723-69711e28daef tempest-DeviceTaggingTestV2_42-1374867943 None] Create export of volume failed (Failed to create iscsi target for volume volume-181fd46a-6f89-4996-aeb1-6403d0d5eb99.): ISCSITargetCreateFailed: Failed to create iscsi target for volume volume-181fd46a-6f89-4996-aeb1-6403d0d5eb99.
Jul 03 06:36:23.982493 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager Traceback (most recent call last):
Jul 03 06:36:23.982925 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/opt/stack/new/cinder/cinder/volume/manager.py", line 1663, in initialize_connection
Jul 03 06:36:23.983472 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager volume, connector)
Jul 03 06:36:23.983892 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/opt/stack/new/cinder/cinder/volume/drivers/lvm.py", line 799, in create_export
Jul 03 06:36:23.984316 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager volume_path)
Jul 03 06:36:23.984868 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/opt/stack/new/cinder/cinder/volume/targets/iscsi.py", line 210, in create_export
Jul 03 06:36:23.985298 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager **portals_config)
Jul 03 06:36:23.985762 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/opt/stack/new/cinder/cinder/utils.py", line 799, in _wrapper
Jul 03 06:36:23.986186 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager return r.call(f, *args, **kwargs)
Jul 03 06:36:23.986663 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/usr/local/lib/python2.7/dist-packages/retrying.py", line 206, in call
Jul 03 06:36:23.987118 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager return attempt.get(self._wrap_exception)
Jul 03 06:36:23.987531 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/usr/local/lib/python2.7/dist-packages/retrying.py", line 247, in get
Jul 03 06:36:23.987801 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager six.reraise(self.value[0], self.value[1], self.value[2])
Jul 03 06:36:23.988058 dsvm-devstack-rax-iad-nodepool-726008 cinder-volume[16575]: ERROR cinder.volume.manager File "/usr/local/lib/python2.7/dist-packages/retrying.py", line 200, in call
Jul 03 06:36:23.988344 dsvm-devst...