Configure iSCSI Initiator.
This example is based on the environment like follows.
+----------------------+ | +----------------------+
| [ iSCSI Target ] |10.0.0.30 | 10.0.0.51| [ iSCSI Initiator ] |
| iscsi.srv.local +----------+----------+ client.srv.local |
| | | |
+----------------------+ +----------------------+[1] Configure iSCSI Initiator to connect to iSCSI Target.
root@client:~# apt -y install open-iscsi
root@client:~# vi /etc/iscsi/initiatorname.iscsi
# change to the same IQN you set on the iSCSI target server
InitiatorName=iqn.2022-10.local.srv:client.initiator01
root@client:~# 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@client:~# systemctl restart iscsid open-iscsi
# discover target
root@client:~# iscsiadm -m discovery -t sendtargets -p 10.0.0.30
10.0.0.30:3260,1 iqn.2022-10.local.srv:iscsi.target01
# confirm status after discovery
root@client:~# iscsiadm -m node -o show
# BEGIN RECORD 2.0-874
node.name = iqn.2022-10.local.srv:iscsi.target01
node.tpgt = 1
node.startup = manual
node.leading_login = No
.....
.....
node.conn[0].iscsi.IFMarker = No
node.conn[0].iscsi.OFMarker = No
# END RECORD
# login to the target
root@client:~# iscsiadm -m node --login
Logging in to [iface: default, target: iqn.2022-10.local.srv:iscsi.target01, portal: 10.0.0.30,3260] (multiple)
Login to [iface: default, target: iqn.2022-10.local.srv:iscsi.target01, portal: 10.0.0.30,3260] successful.
# confirm the established session
root@client:~# iscsiadm -m session -o show
tcp: [1] 10.0.0.30:3260,1 iqn.2022-10.local.srv:iscsi.target01 (non-flash)
# confirm the partitions
root@client:~# cat /proc/partitions
major minor #blocks name
7 0 56264 loop0
7 1 56268 loop1
7 2 70624 loop2
7 3 70764 loop3
7 4 27740 loop4
252 0 31457280 sda
252 1 1024 sda1
252 2 1048576 sda2
252 3 30405632 sda3
253 0 26214400 dm-0
11 0 1048575 sr0
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.
# create label
root@client:~# parted --script /dev/sdb "mklabel gpt"
# create partiton
root@client:~# parted --script /dev/sdb "mkpart primary 0% 100%"
# format with ext4
root@client:~# mkfs.ext4 /dev/sdb1
mke2fs 1.45.5 (06-Oct-2022)
Creating filesystem with 2617344 4k blocks and 655360 inodes
Filesystem UUID: f4255883-6b01-4ec1-b17c-358f86df1eba
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@client:~# mount /dev/sdb1 /mnt
root@client:~# df -hT
Filesystem Type Size Used Avail Use% Mounted on
udev devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs tmpfs 394M 1.1M 393M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4 25G 2.2G 22G 10% /
tmpfs tmpfs 2.0G 0 2.0G 0% /dev/shm
tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/vda2 ext4 976M 103M 806M 12% /boot
/dev/loop0 squashfs 55M 55M 0 100% /snap/core18/1705
/dev/loop1 squashfs 55M 55M 0 100% /snap/core18/1754
/dev/loop2 squashfs 69M 69M 0 100% /snap/lxd/14804
/dev/loop3 squashfs 70M 70M 0 100% /snap/lxd/14890
/dev/loop4 squashfs 28M 28M 0 100% /snap/snapd/7264
/dev/sdb1 ext4 9.8G 37M 9.3G 1% /mnt
tmpfs tmpfs 394M 0 394M 0% /run/user/0