iSCSI : Configure Target (tgt)2024/11/01 |
Configure Storage Server with iSCSI.
This is the example of configuring iSCSI Target with scsi-target-utils. (tgt)
Storage server with iSCSI on network is called iSCSI Target, Client Host that connects to iSCSI Target is called iSCSI Initiator.
This example is based on the environment like follows. +----------------------+ | +----------------------+ | [ iSCSI Target ] |10.0.0.30 | 10.0.0.51| [ iSCSI Initiator ] | | dlp.srv.world +----------+----------+ node01.srv.world | | | | | +----------------------+ +----------------------+ |
[1] | Install administration tools. |
[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. |
# 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 <target>-</target> and set the same way with follows # naming rule : [ iqn.(year)-(month).(reverse of domain name):(any name you like) ] <target iqn.2024-11.world.srv:dlp.target01> # provided device as a iSCSI target backing-store /var/lib/iscsi_disks/disk01.img # iSCSI Initiator's IQN you allow to connect initiator-name iqn.2024-11.world.srv:node01.initiator # authentication info ( set anyone you like for "username", "password" ) incominguser username password </target> |
[3] | If SELinux is enabled, change SELinux Context. |
[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 |
[4] | If Firewalld is running, allow iSCSI Target service. |
[root@dlp ~]# firewall-cmd --add-service=iscsi-target success [root@dlp ~]# firewall-cmd --runtime-to-permanent success |
[5] | Start tgtd and verify status. |
[root@dlp ~]#
systemctl enable --now tgtd # show status [root@dlp ~]# tgtadm --mode target --op show Target 1: iqn.2024-11.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.2024-11.world.srv:node01.initiator |
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