Configure iSCSI Initiator

.

[root@www ~]#  yum -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.2014-07.world.server:www.server.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 # discover target [root@www ~]#  iscsiadm -m discovery -t sendtargets -p 10.0.0.30  [ 635.510656] iscsi: registered transport (tcp) 10.0.0.30:3260,1 iqn.2014-07.world.server:storage.target00 # confirm status after discovery [root@www ~]#  iscsiadm -m node -o show  # BEGIN RECORD 6.2.0.873-21 node.name = iqn.2014-07.world.server: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.2014-07.world.server:storage.target00, portal: 10.0.0.30,3260] (multiple) [ 708.383308] scsi2 : iSCSI Initiator over TCP/IP [ 709.393277] scsi 2:0:0:0: Direct-Access LIO-ORG disk01 4.0 PQ: 0 ANSI: 5 [ 709.395709] scsi 2:0:0:0: alua: supports implicit and explicit TPGS [ 709.398155] scsi 2:0:0:0: alua: port group 00 rel port 01 [ 709.399762] scsi 2:0:0:0: alua: port group 00 state A non-preferred supports TOlUSNA [ 709.401763] scsi 2:0:0:0: alua: Attached [ 709.402910] scsi 2:0:0:0: Attached scsi generic sg0 type 0 Login to [iface: default, target: iqn.2014-07.world.server: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.2014-07.world.server:storage.target00 (non-flash) # confirm the partitions [root@www ~]#  cat /proc/partitions  major minor #blocks name 252 0 52428800 sda 252 1 512000 sda1 252 2 51915776 sda2 253 0 4079616 dm-0 253 1 47833088 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 msdos"  # create partiton [root@www ~]#  parted --script /dev/sdb "mkpart primary 0% 100%"  # format with XFS [root@www ~]#  mkfs.xfs -i size=1024 -s size=4096 /dev/sdb1  meta-data=/dev/sdb1 isize=1024 agcount=16, agsize=327616 blks = sectsz=4096 attr=2, projid32bit=1 = crc=0 data = bsize=4096 blocks=5241856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 # mount it [root@www ~]#  mount /dev/sdb1 /mnt  [ 6894.010661] XFS (sdb1): Mounting Filesystem [ 6894.031358] XFS (sdb1): Ending clean mount [root@www ~]#  df -hT  Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/centos-root xfs 46G 1023M 45G 3% / devtmpfs devtmpfs 1.9G 0 1.9G 0% /dev tmpfs tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs tmpfs 1.9G 8.3M 1.9G 1% /run tmpfs tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/sda1 xfs 497M 120M 378M 25% /boot /dev/sdb1 xfs 20G 33M 20G 1% /mnt