Cannot create cinder volume from image

Issue

• A cinder volume cannot be created from a glance image and will output an error message in /var/log/cinder/volume.log similar to the following :

 2015-10-06 08:48:38.022 7407 DEBUG oslo_concurrency.processutils [req-2011387d-5443-47af-aecd-f5bff9e53061 fdbf90ae7bc54fb487e23f53dff306c3 432c71216e3149f7ac182138758a6b85 - - -] Running cmd (subprocess): sudo cinder-rootwrap /etc/cinder/rootwrap.conf env LC_ALL=C qemu-img info /var/lib/cinder/conversion/tmpV9cvou execute /usr/lib/python2.7/site-packages/oslo_concurrency/processutils.py:199
 2015-10-06 08:48:38.236 7407 DEBUG oslo_concurrency.processutils [req-2011387d-5443-47af-aecd-f5bff9e53061 fdbf90ae7bc54fb487e23f53dff306c3 432c71216e3149f7ac182138758a6b85 - - -] CMD "sudo cinder-rootwrap /etc/cinder/rootwrap.conf env LC_ALL=C qemu-img info /var/lib/cinder/conversion/tmpV9cvou" returned: 1 in 0.215s execute /usr/lib/python2.7/site-packages/oslo_concurrency/processutils.py:225
 2015-10-06 08:48:38.239 7407 DEBUG oslo_concurrency.processutils [req-2011387d-5443-47af-aecd-f5bff9e53061 fdbf90ae7bc54fb487e23f53dff306c3 432c71216e3149f7ac182138758a6b85 - - -] u'sudo cinder-rootwrap /etc/cinder/rootwrap.conf env LC_ALL=C qemu-img info /var/lib/cinder/conversion/tmpV9cvou' failed. Not Retrying. execute /usr/lib/python2.7/site-packages/oslo_concurrency/processutils.py:258
 2015-10-06 08:48:38.243 7407 ERROR cinder.volume.flows.manager.create_volume [req-2011387d-5443-47af-aecd-f5bff9e53061 fdbf90ae7bc54fb487e23f53dff306c3 432c71216e3149f7ac182138758a6b85 - - -] Failed to copy image to volume: 45ed8ea8-75fd-4ca4-b9dd-2578c46f0af7
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume Traceback (most recent call last):
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume   File "/usr/lib/python2.7/site-packages/cinder/volume/flows/manager/create_volume.py", line 501, in _copy_image_to_volume
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume     copy_image_to_volume(context, volume_ref, image_service, image_id)
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume   File "/usr/lib/python2.7/site-packages/osprofiler/profiler.py", line 105, in wrapper
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume     return f(*args, **kwargs)
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume   File "/usr/lib/python2.7/site-packages/cinder/volume/drivers/rbd.py", line 858, in copy_image_to_volume
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume     size=volume['size'])
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume   File "/usr/lib/python2.7/site-packages/cinder/image/image_utils.py", line 226, in fetch_to_raw
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume     run_as_root=run_as_root)
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume   File "/usr/lib/python2.7/site-packages/cinder/image/image_utils.py", line 259, in fetch_to_volume_format
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume     image_id=image_id)
 2015-10-06 08:48:38.243 7407 TRACE cinder.volume.flows.manager.create_volume ImageUnacceptable: Image f21de4f6-4dd3-44d5-914e-d4e10ddc6500 is unacceptable: qemu-img is not installed and image is of type qcow2.  Only RAW images can be used if qemu-img is not installed.