Installation guide

iSCSI-based storage pools

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c. Configure SELinux file contexts

Configure the correct SELinux context for the new image and directory.

# restorecon -R /var/lib/tgtd

The new file-based image, virtimage2.img, is ready to use for iSCSI.

5. Create targets

Targets can be created by adding a XML entry to the /etc/tgt/targets.conf file. The

target attribute requires an iSCSI Qualified Name (IQN). The IQN is in the format:

iqn.yyyy-mm.reversed domain name:optional identifier text

Where:

• yyyy-mm represents the year and month the device was started (for example: 2010-05);

• reversed domain name is the hosts domain name in reverse (for example

server1.example.com in an IQN would be com.example.server1); and

• optional identifier text is any text string, without spaces, that assists the administrator

in identifying devices or hardware.

This example creates iSCSI targets for the two types of images created in the optional steps on

server1.example.com with an optional identifier trial. Add the following to the /etc/tgt/

targets.conf file.

backing-store /dev/virtstore/virtimage1 #LUN 1

backing-store /var/lib/tgtd/virtualization/virtimage2.img #LUN 2

write-cache off

</target>

Ensure that the /etc/tgt/targets.conf file contains the default-driver iscsi line to

set the driver type as iSCSI. The driver uses iSCSI by default.

Important

This example creates a globally accessible target without access control. Refer to the scsi-

target-utils for information on implementing secure access.

6. Restart the tgtd service

Restart the tgtd service to reload the configuration changes.

# service tgtd restart

7. iptables configuration

Open port 3260 for iSCSI access with iptables.

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

# service iptables save