Configure iSCSI Target(tgt)2018/05/10 |
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Configure Storage Server with iSCSI.
This is the example of configuring iSCSI Target with scsi-target-utils. (tgt)
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 ] |10.0.0.30 | 10.0.0.31| [ iSCSI Initiator ] | | dlp.srv.world +----------+----------+ www.srv.world | | | | | +----------------------+ +----------------------+ |
| [1] | Install administration tools first. |
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[root@dlp ~]# dnf -y install scsi-target-utils
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| [2] | Configure iSCSI Target. For example, create an disk-image under the [/var/lib/iscsi_disks] directory and set it as a SCSI device. |
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# create a disk image [root@dlp ~]# mkdir /var/lib/iscsi_disks [root@dlp ~]# dd if=/dev/zero of=/var/lib/iscsi_disks/disk01.img count=0 bs=1 seek=10G
[root@dlp ~]#
vi /etc/tgt/conf.d/target01.conf # create new # if you set some devices, add - and set the same way with follows # naming rule : [ iqn.(year)-(month).(reverse of domain name):(any name you like) ]
<target iqn.2018-05.world.srv:dlp.target01>
# provided devicce as a iSCSI target
backing-store /var/lib/iscsi_disks/disk01.img
# iSCSI Initiator's IQN you allow to connect
initiator-name iqn.2018-05.world.srv:www.initiator01
# authentication info ( set anyone you like for "username", "password" )
incominguser username password
</target>
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| [3] | If SELinux is enabled, change SELinux Context. |
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[root@dlp ~]#
[root@dlp ~]# dnf -y install policycoreutils-python-utils
chcon -R -t tgtd_var_lib_t /var/lib/iscsi_disks [root@dlp ~]# semanage fcontext -a -t tgtd_var_lib_t /var/lib/iscsi_disks
[root@dlp ~]#
vi my-tgtd.te # create new
module my-tgtd 1.0;
require {
type tgtd_t;
type var_run_t;
class dir create;
}
#============= tgtd_t ==============
allow tgtd_t var_run_t:dir create;
checkmodule -m -M -o my-tgtd.mod my-tgtd.te [root@dlp ~]# semodule_package --outfile my-tgtd.pp --module my-tgtd.mod [root@dlp ~]# semodule -i my-tgtd.pp |
| [4] | If Firewalld is running, allow iSCSI Target service. |
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[root@dlp ~]# firewall-cmd --add-service=iscsi-target --permanent success [root@dlp ~]# firewall-cmd --reload success |
| [5] | Start tgtd and verify status. |
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[root@dlp ~]#
chmod 644 /usr/lib/systemd/system/tgtd.service [root@dlp ~]# systemctl start tgtd [root@dlp ~]# systemctl enable tgtd # show status [root@dlp ~]# tgtadm --mode target --op show
Target 1: iqn.2018-05.world.srv:dlp.target01
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: IET 00010000
SCSI SN: beaf10
Size: 0 MB, Block size: 1
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
SWP: No
Thin-provisioning: No
Backing store type: null
Backing store path: None
Backing store flags:
LUN: 1
Type: disk
SCSI ID: IET 00010001
SCSI SN: beaf11
Size: 10737 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
SWP: No
Thin-provisioning: No
Backing store type: rdwr
Backing store path: /var/lib/iscsi_disks/disk01.img
Backing store flags:
Account information:
username
ACL information:
ALL
iqn.2018-05.world.srv:www.initiator01
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