iSCSI : Configure iSCSI Initiator2025/04/21 |
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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. |
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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.2025-04.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.2025-04.world.srv:dlp.target01 # confirm status after discovery root@node01:~# iscsiadm -m node -o show # BEGIN RECORD 2.1.10 node.name = iqn.2025-04.world.srv:dlp.target01 node.tpgt = 1 node.startup = manual node.leading_login = No iface.iscsi_ifacename = default ..... ..... node.conn[0].iscsi.DataDigest = None node.conn[0].iscsi.IFMarker = No node.conn[0].iscsi.OFMarker = No # END RECORD # login to the target # if logout ⇒ iscsiadm --mode node --logoutall=all root@node01:~# iscsiadm -m node --login -p 10.0.0.30 Logging in to [iface: default, target: iqn.2025-04.world.srv:dlp.target01, portal: 10.0.0.30,3260] Login to [iface: default, target: iqn.2025-04.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.2025-04.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 253 0 31457280 sda 253 1 1024 sda1 253 2 2097152 sda2 253 3 29357056 sda3 252 0 29356032 dm-0 8 0 10485760 sdb # added new device provided from the target server as [sdb]
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| [2] | After setting iSCSI device, configure on Initiator to use it like follows. |
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# 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: 609e2316-c97a-42c8-8150-c22604306fb3
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 tmpfs tmpfs 341M 1.1M 340M 1% /run /dev/mapper/ubuntu--vg-ubuntu--lv ext4 28G 6.6G 20G 26% / tmpfs tmpfs 1.7G 0 1.7G 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 1.0M 0 1.0M 0% /run/credentials/systemd-resolved.service tmpfs tmpfs 1.7G 0 1.7G 0% /tmp /dev/vda2 ext4 2.0G 107M 1.7G 6% /boot tmpfs tmpfs 1.0M 0 1.0M 0% /run/credentials/systemd-networkd.service 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 341M 12K 341M 1% /run/user/0 /dev/sda1 ext4 9.8G 2.1M 9.3G 1% /mnt |
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