Fedora 23
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Configure iSCSI Initiator
2015/11/05
 
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    +----------+----------+     www.srv.world    |
|                      |                     |                      |
+----------------------+                     +----------------------+
[1] Configure iSCSI Initiator.
[root@www ~]#
dnf -y install iscsi-initiator-utils
[root@www ~]#
vi /etc/iscsi/initiatorname.iscsi
# change to the same IQN you set on the iSCSI target server

InitiatorName=
iqn.2015-11.world.srv:www.srv.world
[root@www ~]#
vi /etc/iscsi/iscsid.conf
# line 57: uncomment

node.session.auth.authmethod = CHAP
# line 61,62: 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 start iscsid

[root@www ~]#
systemctl enable iscsid
# discover target

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

10.0.0.30:3260,1 iqn.2015-11.world.srv:storage.target00
# confirm status after discovery

[root@www ~]#
iscsiadm -m node -o show 

# BEGIN RECORD 6.2.0.873-26
node.name = iqn.2015-11.world.srv:storage.target00
node.tpgt = 1
node.startup = automatic
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.2015-11.world.srv:storage.target00, portal: 10.0.0.30,3260] (multiple)
[ 1078.890875] scsi host2: iSCSI Initiator over TCP/IP
[ 1078.898859] scsi 2:0:0:0: Direct-Access     LIO-ORG  disk01           4.0  PQ: 0 ANSI: 5
[ 1078.902795] sd 2:0:0:0: Attached scsi generic sg0 type 0
[ 1078.904411] sd 2:0:0:0: [sda] 41943040 512-byte logical blocks: (21.4 GB/20.0 GiB)
Login to [iface: default, target: iqn.2015-11.world.srv:storage.target00, 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.2015-11.world.srv:storage.target00 (non-flash)
# confirm the partitions

[root@www ~]#
cat /proc/partitions 

major minor  #blocks  name

 252        0   31457300 sda
 252        1     512000 sda1
 252        2   30944256 sda2
 253        0   27795456 dm-0
 253        1    3145728 dm-1
   8        0   20971520 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 gpt"

# create partiton

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

# format with XFS

[root@www ~]#
mkfs.xfs /dev/sdb1

# mount

[root@www ~]#
mount /dev/sdb1 /mnt

[root@www ~]#
df -hT 

Filesystem              Type      Size  Used Avail Use% Mounted on
devtmpfs                devtmpfs  2.0G     0  2.0G   0% /dev
tmpfs                   tmpfs     2.0G     0  2.0G   0% /dev/shm
tmpfs                   tmpfs     2.0G  508K  2.0G   1% /run
tmpfs                   tmpfs     2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/mapper/fedora-root xfs        27G  1.4G   26G   5% /
tmpfs                   tmpfs     2.0G     0  2.0G   0% /tmp
/dev/sda1               ext4      477M  123M  325M  28% /boot
tmpfs                   tmpfs     396M     0  396M   0% /run/user/0
/dev/sdb1               xfs        20G   33M   20G   1% /mnt
 
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