iSCSI : Configure iSCSI Initiator

Configure iSCSI Initiator. This example is based on the environment like follows. +----------------------+ | +----------------------+ | [ iSCSI Target ] |10.0.0.30 | 10.0.0.51| [ iSCSI Initiator ] | | dlp.srv.world +----------+----------+ node01.srv.world | | | | | +----------------------+ +----------------------+

[1]	Configure iSCSI Initiator to connect to iSCSI Target.

root@node01:~#  apt -y install open-iscsi root@node01:~#  vi /etc/iscsi/initiatorname.iscsi # change to the same IQN you set on the iSCSI target server InitiatorName= iqn.2025-08.world.srv:node01.initiator root@node01:~#  vi /etc/iscsi/iscsid.conf # line 74 : uncomment node.session.auth.authmethod = CHAP # line 86,87: 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@node01:~#  systemctl restart iscsid open-iscsi # discover target root@node01:~#  iscsiadm -m discovery -t sendtargets -p 10.0.0.30 10.0.0.30:3260,1 iqn.2025-08.world.srv:dlp.target01 # confirm status after discovery root@node01:~#  iscsiadm -m node -o show # BEGIN RECORD 2.1.11 node.name = iqn.2025-08.world.srv:dlp.target01 node.tpgt = 1 node.startup = manual node.leading_login = No iface.iscsi_ifacename = default ..... ..... # login to the target root@node01:~#  iscsiadm -m node --login -p 10.0.0.30 Login to [iface: default, target: iqn.2025-08.world.srv:dlp.target01, portal: 10.0.0.30,3260] successful. # confirm the established session root@node01:~#  iscsiadm -m session -o show tcp: [1] 10.0.0.30:3260,1 iqn.2025-08.world.srv:dlp.target01 (non-flash) # if enable automatic login for system starting, set like follows root@node01:~#  iscsiadm -m node -p 10.0.0.30 -o update -n node.startup -v automatic # confirm the partitions root@node01:~#  cat /proc/partitions major minor #blocks name 254 0 31457280 sda 254 1 999424 sda1 254 2 1 sda2 254 5 30454784 sda5 253 0 28844032 dm-0 253 1 1609728 dm-1 8 0 10485760 sdb # added new device provided from the target server as [sdb]

[2]	After setting iSCSI device, configure on Initiator to use it like follows.

root@node01:~#  apt -y install parted # create label root@node01:~#  parted --script /dev/sdb "mklabel gpt" # create partition root@node01:~#  parted --script /dev/sdb "mkpart primary 0% 100%" # format with ext4 root@node01:~#  mkfs.ext4 /dev/sdb1 mke2fs 1.47.2 (1-Jan-2025) Creating filesystem with 2617344 4k blocks and 655360 inodes Filesystem UUID: 519582a5-9609-4d24-84dd-7b2867a0785f 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 root@node01:~#  mount /dev/sdb1 /mnt root@node01:~#  df -hT Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 1.9G 0 1.9G 0% /dev tmpfs tmpfs 392M 572K 392M 1% /run /dev/mapper/debian--vg-root ext4 27G 940M 25G 4% / tmpfs tmpfs 2.0G 0 2.0G 0% /dev/shm tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs tmpfs 1.0M 0 1.0M 0% /run/credentials/systemd-journald.service tmpfs tmpfs 2.0G 0 2.0G 0% /tmp /dev/vda1 ext4 943M 75M 804M 9% /boot tmpfs tmpfs 1.0M 0 1.0M 0% /run/credentials/getty@tty1.service tmpfs tmpfs 1.0M 0 1.0M 0% /run/credentials/serial-getty@ttyS0.service tmpfs tmpfs 392M 4.0K 392M 1% /run/user/0 /dev/sda1 ext4 9.8G 2.1M 9.3G 1% /mnt