Configure Storage Server with iSCSI

Configure Storage Server with iSCSI. This is the example of configuring iSCSI Target with scsi-target-utils.

[1]	Install scsi-target-utils.

# install from EPEL [root@dlp ~]#  yum --enablerepo=epel -y install scsi-target-utils

[2]	Configure iSCSI Target. For example, create a disk image under the [/iscsi_disks] directory and set it as a shared disk.

# create a disk image [root@dlp ~]#  mkdir /iscsi_disks  [root@dlp ~]#  dd if=/dev/zero of=/iscsi_disks/disk01.img count=0 bs=1 seek=10G [root@dlp ~]#  vi /etc/tgt/targets.conf # add follows to the end # if you set some devices, add <target>-</target> and set the same way with follows # naming rule : [ iqn.yaer-month.domain:any name ] <target iqn.2015-12.world.server:target00>      # provided devicce as a iSCSI target     backing-store /iscsi_disks/disk01.img      # iSCSI Initiator's IP address you allow to connect     initiator-address 10.0.0.31      # authentication info ( set anyone you like for "username", "password" )     incominguser username password </target>

[3]	If SELinux is enabled, change SELinux Context.

[root@dlp ~]#  chcon -R -t tgtd_var_lib_t /iscsi_disks  [root@dlp ~]#  semanage fcontext -a -t tgtd_var_lib_t /iscsi_disks

[4]	If Firewalld is running, allow iSCSI Target service.

[root@dlp ~]#  firewall-cmd --add-service=iscsi-target --permanent  success [root@dlp ~]#  firewall-cmd --reload  success

[5]	Start tgtd and verify status.

[root@dlp ~]#  systemctl start tgtd  [root@dlp ~]#  systemctl enable tgtd  # show status [root@dlp ~]#  tgtadm --mode target --op show  Target 1: iqn.2015-12.world.server:target00 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: /iscsi_disks/disk01.img Backing store flags: Account information: username ACL information: 10.0.0.31