Fedora 26
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Configure iSCSI Target (targetcli)2017/07/17

Configure Storage Server with iSCSI.
A storage on a network is called iSCSI Target, a Client which connects to iSCSI Target is called iSCSI Initiator. This example is based on the environment below.
+----------------------+          |          +----------------------+
| [   iSCSI Target   ] | || [ iSCSI Initiator  ] |
|     dlp.srv.world    +----------+----------+    www.srv.world     |
|                      |                     |                      |
+----------------------+                     +----------------------+

[1] Install administration tools first.
[root@dlp ~]#
dnf -y install targetcli
[2] Configure iSCSI Target.
For example, create an disk-image under the [/var/lib/iscsi_disks] directory and set it as a SCSI device.
# create a directory

[root@dlp ~]#
mkdir /var/lib/iscsi_disks

# enter the admin console

[root@dlp ~]#

targetcli shell version 2.1.fb46
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.

cd backstores/fileio
# create a disk-image with the name [disk01] on [/var/lib/iscsi_disks/disk01.img] with 10G

create disk01 /var/lib/iscsi_disks/disk01.img 10G

Created fileio disk01 with size 10737418240
cd /iscsi
# create a target

create iqn.2017-07.world.srv:storage.target01

Created target iqn.2017-07.world.srv:storage.target01.
Created TPG 1.
Global pref auto_add_default_portal=true
Created default portal listening on all IPs (, port 3260.
cd iqn.2017-07.world.srv:storage.target01/tpg1/luns
# set LUN

create /backstores/fileio/disk01

Created LUN 0.
cd ../acls
# set ACL (it's the IQN of an initiator you permit to connect)

create iqn.2017-07.world.srv:www.srv.world

Created Node ACL for iqn.2017-07.world.srv:www.srv.world
Created mapped LUN 0.
cd iqn.2017-07.world.srv:www.srv.world
# set UserID for authentication

set auth userid=username

Parameter userid is now 'username'.
set auth password=password

Parameter password is now 'password'.

Global pref auto_save_on_exit=true
Last 10 configs saved in /etc/target/backup.
Configuration saved to /etc/target/saveconfig.json
# after configuration above, the target enters in listening like follows

[root@dlp ~]#
ss -napt | grep 3260

LISTEN     0      256          *:3260                     *:*

[root@dlp ~]#
systemctl enable target
[3] If Firewalld is running, allow iSCSI Target service.
[root@dlp ~]#
firewall-cmd --add-service=iscsi-target --permanent

[root@dlp ~]#
firewall-cmd --reload

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