#yum install targetcli
#targetcli
/> ls
o- / [...]
o- backstores [...]
| o- block [Storage Objects: 1]
| | o- dev_sdb [/dev/sdb (60.0GiB) write-thru activated]
| | o- alua [ALUA Groups: 1]
| | o- default_tg_pt_gp [ALUA state: Active/optimized]
| o- fileio [Storage Objects: 0]
| o- pscsi [Storage Objects: 0]
| o- ramdisk [Storage Objects: 0]
o- iscsi [Targets: 1]
| o- iqn.2003-01.org.linux-iscsi.iscsid.x8664:sn.bfc48a1cbef2 [TPGs: 1]
| o- tpg1 [no-gen-acls, no-auth]
| o- acls [ACLs: 1]
| | o- iqn.1998-01.com.vmware:3a4fc8a8-5206-a0e0-146c-500100030000-057c77a5 [Mapped LUNs: 1]
| | o- mapped_lun1 [lun1 block/dev_sdb (rw)]
| o- luns [LUNs: 1]
| | o- lun1 [block/dev_sdb (/dev/sdb) (default_tg_pt_gp)]
| o- portals [Portals: 1]
| o- 0.0.0.0:3260 [OK]
o- loopback [Targets: 0]
/>

To create a block backstore from the targetcli shell:

/> cd /backstores/block
/backstores/block> create name=LUN_1 dev=/dev/xvdb

To create a fileio backstore from the targetcli shell:

/> cd /backstores/fileio
/backstores/fileio> create name=LUN_3 /root/disk1.img 5G

To create an iSCSI target

/> cd /iscsi
/iscsi> create

cd tpg1/luns
tpg1/luns> create /backstores/block/LUN_1 lun1

ACLs
cd tpg1/acls
create iqn.1998-01.com.vmware:3a4fc8a8-5206-a0e0-146c-500100030000-057c77a5

/>saveconfig