Centos 安装配置iscsi

在测试oracle rac的时候用iscsi来模拟磁阵的(真的磁阵需要多路径软件)，简单的记录下

#scsi server
yum install scsi-target-utils

service tgtd start

chkconfig tgtd on

mkdir /srv/iscsi
dd if=/dev/zero of=/srv/iscsi/disk01.img bs=1M count=

#配置虚拟磁盘
vi /etc/tgt/targets.conf
#backing-store (虚拟的装置)
#direct-store (实际的装置)

<target iqn.-.dev.iscsi-target:iscsidisk>
backing-store /srv/iscsi/disk01.img
initiator-address 192.168.55.0/
incominguser iscsiadm iscsiadm123
write-cache off
</target>

[root@localhost ~]# tgt-admin -show
Target : iqn.-.dev.iscsi-target:iscsidisk
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN:
Type: controller
SCSI ID: IET
SCSI SN: beaf10
Size:  MB, Block size:
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: null
Backing store path: None
Backing store flags:
LUN:
Type: disk
SCSI ID: IET
SCSI SN: beaf11
Size:  MB, Block size:
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: rdwr
Backing store path: /srv/iscsi/disk1.img
Backing store flags:
Account information:
ACL information:
192.168.55.0/

[root@localhost ~]# tgt-admin --show
Target : iqn.-.dev.iscsi-target:iscsidisk
System information:
Driver: iscsi
State: ready
I_T nexus information:
I_T nexus:
Initiator: iqn.-.com.redhat:1e12cf823426
Connection:
IP Address: 192.168.55.159
LUN information:
LUN:
Type: controller
SCSI ID: IET
SCSI SN: beaf10
Size:  MB, Block size:
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
Backing store type: null
Backing store path: None
Backing store flags:
Account information:
ACL information:
ALL

#scsi client　install
yum install iscsi-initiator-utils

chkconfig iscsid on
chkconfig iscsi on
/etc/init.d/iscsi start
/etc/init.d/iscsid start

#add
#vi /etc/iscsi/iscsid.conf
node.session.auth.username = iscsiadm
node.session.auth.password = iscsiadm123

#修改客户端名字
vi /etc/iscsi/initiatorname.iscsi
#InitiatorName=iqn.-.com.redhat:1e12cf823426
InitiatorName=iqn.-.dev.iscsi-initiator:initiator

#发现
iscsiadm -m discovery -t sendtargets -p 192.168.55.158
192.168.55.158:, iqn.-.dev.iscsi-target:iscsidisk

#登陆
iscsiadm -m node -T iqn.-.dev.iscsi-target:iscsidisk -p 192.168.55.158: --login
Logging in to [iface: default, target: iqn.-.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,] (multiple)
Login to [iface: default, target: iqn.-.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,] successful.

#退出
iscsiadm -m node -T iqn.-.dev.iscsi-target:iscsidisk -p 192.168.55.158: --logout
Logging out of session [sid: , target: iqn.-.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,]
Logout of [sid: , target: iqn.-.dev.iscsi-target:iscsidisk, portal: 192.168.55.158,] successful.

#查看连接
iscsiadm -m session
tcp: [] 192.168.55.158:, iqn.-.dev.iscsi-target:iscsidisk (non-flash)

#查看

[root@localhost ~]# fdisk -l

Disk /dev/sda: 12.9 GB,  bytes
 heads,  sectors/track,  cylinders
Units = cylinders of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes
Disk identifier: 0x0004c11a

Device Boot Start End Blocks Id System
/dev/sda1 *     Linux
Partition  does not end on cylinder boundary.
/dev/sda2    8e Linux LVM

Disk /dev/mapper/VolGroup-lv_root: 11.1 GB,  bytes
 heads,  sectors/track,  cylinders
Units = cylinders of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes
Disk identifier: 0x00000000

Disk /dev/mapper/VolGroup-lv_swap:  MB,  bytes
 heads,  sectors/track,  cylinders
Units = cylinders of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes
Disk identifier: 0x00000000

Disk /dev/sdb:  MB,  bytes
 heads,  sectors/track,  cylinders
Units = cylinders of  *  =  bytes
Sector size (logical/physical):  bytes /  bytes
I/O size (minimum/optimal):  bytes /  bytes
Disk identifier: 0x00000000