[Инсталляция Oracle RAC 12.1 в Oracle Linux 6.7 (ISCSI + ASM)]: Подготовка сервера storage (ISCSI)


  • iSCSI target — программа или контроллер, осуществляющие эмуляцию диска и выполняющие запросы iSCSI.
  • iSCSI initiator — программа, осуществляющая клиентский доступ к SCSI.



Инсталляция iSCSI target

Server: storage 
# yum install -y \
scsi-target-utils



# ls /dev/sd*



/dev/sda   /dev/sda2  /dev/sdc  /dev/sde  /dev/sdg
/dev/sda1  /dev/sdb   /dev/sdd  /dev/sdf  /dev/sdh

Повторяем последовательно команды:

# fdisk /dev/sdb
# fdisk /dev/sdc
# fdisk /dev/sdd
# fdisk /dev/sde
# fdisk /dev/sdf
# fdisk /dev/sdg
# fdisk /dev/sdh



WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): c
DOS Compatibility flag is not set

Command (m for help): u
Changing display/entry units to sectors

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First sector (2048-83886079, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-83886079, default 83886079):
Using default value 83886079

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.



# ls /dev/sd*



/dev/sda   /dev/sdb   /dev/sdc1  /dev/sde   /dev/sdf1  /dev/sdh
/dev/sda1  /dev/sdb1  /dev/sdd   /dev/sde1  /dev/sdg   /dev/sdh1
/dev/sda2  /dev/sdc   /dev/sdd1  /dev/sdf   /dev/sdg1



# vi /etc/tgt/targets.conf

Обязательно должна быть разкомментирована строка:

default-driver iscsi

Добавляю в конец файла:

<target ru.oracle-dba:disk1>
        backing-store /dev/sdb1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>
<target ru.oracle-dba:disk2>
        backing-store /dev/sdc1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>
<target ru.oracle-dba:disk3>
        backing-store /dev/sdd1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>
<target ru.oracle-dba:disk4>
        backing-store /dev/sde1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>
<target ru.oracle-dba:disk5>
        backing-store /dev/sdf1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>
<target ru.oracle-dba:disk6>
        backing-store /dev/sdg1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>
<target ru.oracle-dba:disk7>
        backing-store /dev/sdh1
        initiator-address 192.168.3.11
        initiator-address 192.168.3.12
</target>



# chkconfig --level 345 tgtd on
# service tgtd restart

Посмотреть результаты:

# tgt-admin --show



Target 1: ru.oracle-dba:disk1
    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: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sdb1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12
Target 2: ru.oracle-dba:disk2
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00020000
            SCSI SN: beaf20
            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     00020001
            SCSI SN: beaf21
            Size: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sdc1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12
Target 3: ru.oracle-dba:disk3
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00030000
            SCSI SN: beaf30
            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     00030001
            SCSI SN: beaf31
            Size: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sdd1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12
Target 4: ru.oracle-dba:disk4
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00040000
            SCSI SN: beaf40
            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     00040001
            SCSI SN: beaf41
            Size: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sde1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12
Target 5: ru.oracle-dba:disk5
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00050000
            SCSI SN: beaf50
            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     00050001
            SCSI SN: beaf51
            Size: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sdf1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12
Target 6: ru.oracle-dba:disk6
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00060000
            SCSI SN: beaf60
            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     00060001
            SCSI SN: beaf61
            Size: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sdg1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12
Target 7: ru.oracle-dba:disk7
    System information:
        Driver: iscsi
        State: ready
    I_T nexus information:
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00070000
            SCSI SN: beaf70
            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     00070001
            SCSI SN: beaf71
            Size: 42949 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sdh1
            Backing store flags:
    Account information:
    ACL information:
        192.168.3.11
        192.168.3.12