==> /var/log/cinder/volume.log <==
    launcher.run_server(server)
  File "/usr/lib/python2.7/site-packages/cinder/service.py", line 95, in run_server
    server.start()
  File "/usr/lib/python2.7/site-packages/cinder/service.py", line 342, in start
    self.manager.init_host()
  File "/usr/lib/python2.7/site-packages/cinder/volume/manager.py", line 143, in init_host
    self.driver.check_for_setup_error()
  File "/usr/lib/python2.7/site-packages/cinder/volume/drivers/lvm.py", line 78, in check_for_setup_error
    raise exception.VolumeBackendAPIException(data=exception_message)
VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: volume group cinder-volumes doesn't exist
[root@localhost ~]# vi /usr/lib/python2.7/site-packages/cinder/volume/drivers/lvm.py


-- so let's try to set up cinder volumes -- 

=======
[root@localhost ~]# systemctl stop openstack-cinder-volume.service
[root@localhost ~]# systemctl stop openstack-cinder-volume.service
=======
[root@localhost ~]# truncate -s20G /var/lib/cinder/cinder-volumes.img
=======
[root@localhost ~]# vgcreate cinder-volumes $(sudo losetup --show -f /var/lib/cinder/cinder-volumes.img)
  No physical volume found in lvmetad cache for /dev/loop4
  Physical volume "/dev/loop4" successfully created
  Volume group "cinder-volumes" successfully created
[root@localhost ~]# 
=======
[root@localhost ~]# systemctl status openstack-cinder-volume.service                                                                                  
openstack-cinder-volume.service - OpenStack Cinder Volume Server
          Loaded: loaded (/usr/lib/systemd/system/openstack-cinder-volume.service; enabled)
          Active: active (running) since Wed 2013-04-03 05:29:59 EDT; 28s ago
        Main PID: 29417 (cinder-volume)
          CGroup: name=systemd:/system/openstack-cinder-volume.service
                  ├─29417 /usr/bin/python /usr/bin/cinder-volume --config-file /etc/cinder/cinder.conf --logfile /var/log/cinder/volume.log
                  └─29422 /usr/bin/python /usr/bin/cinder-volume --config-file /etc/cinder/cinder.conf --logfile /var/log/cinder/volume.log

Apr 03 05:29:59 localhost.localdomain systemd[1]: Started OpenStack Cinder Volume Server.
Apr 03 05:30:00 localhost.localdomain sudo[29423]: cinder : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/cinder-rootwrap /etc/cinder/rootw...-o name
Apr 03 05:30:00 localhost.localdomain sudo[29429]: cinder : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/cinder-rootwrap /etc/cinder/rootw...volumes
[root@localhost ~]# 
=======
[root@localhost ~]# service tgtd status
Redirecting to /bin/systemctl status  tgtd.service
tgtd.service - tgtd iSCSI target daemon
          Loaded: loaded (/usr/lib/systemd/system/tgtd.service; disabled)
          Active: inactive (dead)
=======
[root@localhost ~]# sed -i '1iinclude /etc/nova/volumes/*' /etc/tgt/targets.conf
[root@localhost ~]# sed -i '1iinclude /etc/cinder/volumes/*' /etc/tgt/targets.conf
=======
[root@localhost ~]# service tgtd status
Redirecting to /bin/systemctl status  tgtd.service
tgtd.service - tgtd iSCSI target daemon
          Loaded: loaded (/usr/lib/systemd/system/tgtd.service; disabled)
          Active: active (running) since Wed 2013-04-03 06:12:21 EDT; 34min ago
         Process: 29899 ExecStartPost=/usr/sbin/tgtadm --op update --mode sys --name State -v ready (code=exited, status=0/SUCCESS)
         Process: 29893 ExecStartPost=/usr/sbin/tgt-admin -e -c $TGTD_CONFIG (code=exited, status=0/SUCCESS)
         Process: 29890 ExecStartPost=/usr/sbin/tgtadm --op update --mode sys --name State -v offline (code=exited, status=0/SUCCESS)
        Main PID: 29889 (tgtd)
          CGroup: name=systemd:/system/tgtd.service
                  └─29889 /usr/sbin/tgtd -f

Apr 03 06:12:20 localhost.localdomain tgtd[29889]: librdmacm: Warning: couldn't read ABI version.
Apr 03 06:12:20 localhost.localdomain tgtd[29889]: librdmacm: Warning: assuming: 4
Apr 03 06:12:20 localhost.localdomain tgtd[29889]: librdmacm: Fatal: unable to get RDMA device list
Apr 03 06:12:20 localhost.localdomain tgtd[29889]: tgtd: iser_ib_init(3376) Failed to initialize RDMA; load kernel modules?
Apr 03 06:12:20 localhost.localdomain tgtd[29889]: tgtd: work_timer_start(146) use timer_fd based scheduler
Apr 03 06:12:20 localhost.localdomain tgtd[29889]: tgtd: bs_init(313) use signalfd notification
Apr 03 06:12:21 localhost.localdomain systemd[1]: Started tgtd iSCSI target daemon.
Apr 03 06:46:21 localhost.localdomain systemd[1]: Started tgtd iSCSI target daemon.
=======
[root@localhost ~]# vgs
  VG             #PV #LV #SN Attr   VSize  VFree 
  cinder-volumes   1   0   0 wz--n- 20.00g 20.00g
  fedora           1   2   0 wz--n-  9.51g     0 
[root@localhost ~]# 
=======