介紹

Linux SCSI target framework (tgt)

Home Page: http://stgt.sourceforge.net/

tgtd

Install

yum -y install scsi-target-utils

DOC

man targets.conf

設定 targets

vi /etc/tgt/targets.conf

# a hierarchy of nested tags to define targets and LUNs

default-driver iscsi

<target iqn.2015-02.esxi.server:target00>
    # provided devicce as a iSCSI target
    backing-store /backup/esxi_iscsi_bak/esxi.iscsi.disk    # LUN1
    backing-store /dev/san/xen1-disk1                       # LUN2
    # iSCSI Initiator's IP address you allow to connect
    # initiator-address ALL
    initiator-address 10.0.0.31
</target>

# default on

write-cache on

# authentication, may be used multiple times per target

incominguser username password

LUN directives

backing-store (regular file, or a block device

direct-store (VENDOR_ID, SERIAL_NUM)

# ext4

fallocate -l 400G esxi.iscsi.disk

# ext3

truncate -s 400G esxi.iscsi.disk

service tgtd start

chkconfig tgtd on

# Confirm status

tgtadm --mode target --op show

Target 1: iqn.2015-02.esxi.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
            Backing store type: null
            Backing store path: None
            Backing store flags:
        LUN: 1
            Type: disk
            SCSI ID: IET     00010001
            SCSI SN: beaf11
            Size: 429497 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /backup/esxi_iscsi_bak/esxi.iscsi.disk
            Backing store flags:
    Account information:
    ACL information:
        10.0.0.31

tgtadm - Linux SCSI Target Administration Utility

--mode (-m)

target
logicalunit

--op (-o)

show
new
delete
bind
unbind
update
 

tgt-admin - Linux SCSI Target Configuration Tool (/etc/tgt/targets.conf)

tgt-admin --show

相當於

tgtadm --mode target --op show

--offline

--ready

--update iqn.2008-08.com.example:some.target

--delete iqn.2008-08.com.example:some.target