Ubuntu 17.04
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Configure iSCSI Initiator
2017/04/17
 
Configure iSCSI Initiator on Ubuntu.
This example is based on the environment below.
+----------------------+          |          +----------------------+
| [   iSCSI Target   ] |10.0.0.30 | 10.0.0.31| [ iSCSI Initiator  ] |
|     dlp.srv.world    +----------+----------+     www.srv.world    |
|                      |                     |                      |
+----------------------+                     +----------------------+

[1] Configure iSCSI Initiator.
root@www:~#
vi /etc/iscsi/iscsid.conf
# line 53: uncomment

node.session.auth.authmethod = CHAP
# line 57,58: uncomment and specify the username and password you set on the iSCSI target server

node.session.auth.username =
username

node.session.auth.password =
password
root@www:~#
systemctl restart iscsid open-iscsi
# discover target

root@www:~#
iscsiadm -m discovery -t sendtargets -p 10.0.0.30

10.0.0.30:3260,1 iqn.2017-04.world.srv:target01

# confirm status after discovery

root@www:~#
iscsiadm -m node -o show

# BEGIN RECORD 2.0-873
node.name = iqn.2017-04.world.srv:target01
node.tpgt = 1
node.startup = manual
node.leading_login = No
...
...
...
node.conn[0].iscsi.IFMarker = No
node.conn[0].iscsi.OFMarker = No
# END RECORD

# login to the target

root@www:~#
iscsiadm -m node --login

Logging in to [iface: default, target: iqn.2017-04.world.srv:target01, portal: 10.0.0.30,3260] (multiple)
Login to [iface: default, target: iqn.2017-04.world.srv:target01, portal: 10.0.0.30,3260] successful.

# confirm the established session

root@www:~#
iscsiadm -m session -o show

tcp: [1] 10.0.0.30:3260,1 iqn.2017-04.world.srv:target01 (non-flash)
# confirm the partitions

root@www:~#
cat /proc/partitions

major minor  #blocks  name

   1        0      65536 ram0
   1        1      65536 ram1
   1        2      65536 ram2
.....
.....
 252        0   26759168 dm-0
 252        1    4194304 dm-1
   8        0   10485760 sdb

# added new device provided from the target server as "sdb"
[2] After setting iSCSI devide, configure on Initiator to use it like follwos.
# create label

root@www:~#
parted --script /dev/sdb "mklabel msdos"

# create partiton

root@www:~#
parted --script /dev/sdb "mkpart primary 0% 100%"

# format with ext4

root@www:~#
mkfs.ext4 /dev/sdb1

mke2fs 1.43.4 (31-Jan-2017)
Creating filesystem with 2621184 4k blocks and 655360 inodes
Filesystem UUID: 19bf0626-7f7a-49df-ad22-82ca6f258ed5
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done

# mount

root@www:~#
mount /dev/sdb1 /mnt

root@www:~#
df -hT

Filesystem                  Type      Size  Used Avail Use% Mounted on
udev                        devtmpfs  2.0G     0  2.0G   0% /dev
tmpfs                       tmpfs     395M  5.5M  390M   2% /run
/dev/mapper/ubuntu--vg-root ext4       26G  1.4G   23G   6% /
tmpfs                       tmpfs     2.0G     0  2.0G   0% /dev/shm
tmpfs                       tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs                       tmpfs     2.0G     0  2.0G   0% /sys/fs/cgroup
tmpfs                       tmpfs     395M     0  395M   0% /run/user/0
/dev/sdb1                   ext4      9.8G   37M  9.3G   1% /mnt
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