'Removes the specified volume from Cinder management.
Does not delete the underlying backend storage object. A log entry
will be made to notify the Admin that the volume is no longer being
managed.
:param volume: Cinder volume to unmanage'

def unmanage(self, volume):

    vol_str = (CONF.volume_name_template % volume['id'])
    vol_path = os.path.join(volume['provider_location'], vol_str)
    LOG.info('Cinder    NFS    volume    with    current    path    "%(cr)s"    is    no    longer    being    managed.', {'cr': vol_path})
