SYS: Configure an iSCSI target.

To create an iSCSI target, you need to follow several steps on a dedicated server.

Install the following package:

# yum install -y scsi-target-utils

Activate the tgtd service at boot:

# chkconfig tgtd on

Start the tgtd service:

# service tgtd start

Create a dedicated directory:

# mkdir -p /var/lib/tgtd/kvmguests

Create a specific file (here 512MB):

# dd if=/dev/zero of=/var/lib/tgtd/kvmguests/shareddata.img bs=1M count=512

Set up SELinux configuration:

# restorecon -R /var/lib/tgtd

Edit the /etc/tgt/targets.conf file and add the following lines at the end:

<target iqn.2008-09.com.example:iscsi.kvmguests>
backing-store /var/lib/tgtd/kvmguests/shareddata.img
</target>

Update the configuration:

# tgt-admin --execute

Check the configuration:

# tgt-admin --show

Add a new rule to the firewall:

# iptables -I INPUT -m state --state NEW -m tcp -p tcp --dport 3260 -j ACCEPT

Save the firewall configuration:

# service iptables save

Source: https://www.berrange.com/tags/tgtadm/