SLES 11 SP4
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Configure iSCSI Initiator
2015/12/02
 
Configure iSCSI Initiator.
This example is based on the environment below. 
+----------------------+          |          +----------------------+
| [   iSCSI Target   ] |10.0.0.30 | 10.0.0.31| [ iSCSI Initiator  ] |
|     dlp.srv.world    +----------+----------+   client.srv.world   |
|                      |                     |                      |
+----------------------+                     +----------------------+
[1] Configure iSCSI Initiator.
client:~#
zypper -n install open-iscsi
client:~#
vi /etc/iscsi/iscsid.conf
# line 58: uncomment

node.session.auth.authmethod = CHAP
# line 62,63: uncomment and set username and password which set on iSCSI Target

node.session.auth.username =
username

node.session.auth.password =
password
client:~#
/etc/init.d/open-iscsi start

client:~#
chkconfig open-iscsi on
# discover target

client:~#
iscsiadm -m discovery -t sendtargets -p 10.0.0.30 

Loading iscsi modules:  tcp                              done
Starting iSCSI initiator service:                        done
Setting up iSCSI targets:                                unused
10.0.0.30:3260,1 iqn.2015-12.world.srv:target00
# confirm status after discovery

client:~#
iscsiadm -m node -o show

# BEGIN RECORD 2.0-873.suse
node.name = iqn.2015-12.world.srv:target00
node.tpgt = 1
node.startup = manual
node.leading_login = No
.....
.....
# login to target

client:~#
iscsiadm -m node --login

Logging in to [iface: default, target: iqn.2015-12.world.srv:target00, portal: 10.0.0.30,3260] (multiple)
Login to [iface: default, target: iqn.2015-12.world.srv:target00, portal: 10.0.0.30,3260] successful.
# confirm established session

client:~#
iscsiadm -m session -o show

tcp: [1] 10.0.0.30:3260,1 iqn.2015-12.world.srv:target00 (non-flash)
# confirm partitions

client:~#
cat /proc/partitions 

major minor  #blocks  name

 253        0   31457348 sda
 253        1    2103296 sda1
 253        2   29352960 sda2
   8        0   10485760 sdb
# added new device provided from target as [sdb]
[2] It's possible to use iSCSI device like follows.
client:~#
zypper -n install parted
# create a label

client:~#
parted --script /dev/sdb "mklabel msdos"

# create a partition

client:~#
parted --script /dev/sdb "mkpart primary 0% 100%"

# format with EXT4

client:~#
mkfs.ext4 /dev/sdb1
# mount

client:~#
mount /dev/sdb1 /mnt

client:~#
df -hT 

Filesystem     Type   Size  Used Avail Use% Mounted on
/dev/sda2      ext3    28G  3.3G   24G  13% /
udev           tmpfs  1.9G  108K  1.9G   1% /dev
tmpfs          tmpfs  1.9G  648K  1.9G   1% /dev/shm
/dev/sdb1      ext4   9.9G  151M  9.2G   2% /mnt
 
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