+----------------------+ | +----------------------+
| [ iSCSI Target ] |10.0.0.30 | 10.0.0.31| [ iSCSI Initiator ] |
| dlp.srv.world +----------+----------+ www.srv.world |
| | | |
+----------------------+ +----------------------+
Configure iSCSI Target(targetcli)
- Install administration tools first.
root@dlp:~# apt-get -y install targetcli - Configure iSCSI Target.
# create a directory
root@dlp:~# mkdir /var/iscsi_disks
# enter the admin console
root@dlp:~# targetcli
targetcli 3.0.pre4.1~ga55d018 (rtslib 3.0.pre4.1~g1b33ceb)
Copyright (c) 2011-2014 by Datera, Inc.
All rights reserved.
/> cd backstores/fileio
# create a disk-image with the name "disk01" on /var/iscsi_disks/disk01.img with 10G
/backstores/fileio> create disk01 /var/iscsi_disks/disk01.img 10G
Using buffered mode.
Created fileio disk01.
/backstores/fileio> cd /iscsi
# create a target
/iscsi> create iqn.2016-04.world.srv:storage.target00
Created target iqn.2016-04.world.srv:storage.target00.
Selected TPG Tag 1.
Created TPG 1.
# set portal (set IP address to listen)
/iscsi> cd iqn.2016-04.world.srv:storage.target00/tpg1/portals
/iscsi/iqn.20.../tpg1/portals> create 0.0.0.0
Using default IP port 3260
Created network portal 0.0.0.0:3260.
/iscsi/iqn.20.../tpg1/portals> cd ../luns
# set LUN
/iscsi/iqn.20...t00/tpg1/luns> create /backstores/fileio/disk01
Selected LUN 0.
Created LUN 0.
/iscsi/iqn.20...t00/tpg1/luns> cd ../acls
# set ACL (it's the IQN of an initiator you permit to connect)
/iscsi/iqn.20...t00/tpg1/acls> create iqn.2016-04.world.srv:www.srv.world
Created Node ACL for iqn.2016-04.world.srv:www.srv.world:www.srv.world
Created mapped LUN 0.
/iscsi/iqn.20...t00/tpg1/acls> cd iqn.2016-04.world.srv:www.srv.world
# set UserID for authentication
/iscsi/iqn.20....srv.world> set auth userid=username
Parameter userid is now 'username'.
/iscsi/iqn.20....srv.world> set auth password=password
Parameter password is now 'password'.
/iscsi/iqn.20....srv.world> exit
Comparing startup and running configs...
Some changes need saving.
Save configuration? [Y/n]: y
Saving new startup configuration
# after configuration above, the target enters in listening like follows
root@dlp:~# ss -napt | grep 3260
LISTEN 0 256 *:3260 *:*
# set auto-start
root@dlp:~# /lib/systemd/systemd-sysv-install enable target Configure iSCSI Target(iscsitarget)
- Install administration tools first.
root@dlp:~# apt-get -y install iscsitarget iscsitarget-dkms - Configure iSCSI Target.
# create disk image 10G
root@dlp:~# mkdir /var/iscsi_disks
root@dlp:~# dd if=/dev/zero of=/var/iscsi_disks/disk01.img count=10000000 bs=1024
# start iscsitarget
root@dlp:~# systemctl restart iscsitargetiSCSI Initiator (Ubuntu)
- Configure iSCSI Initiator.
root@www:~# apt-get -y install open-iscsi
root@www:~# vi /etc/iscsi/initiatorname.iscsi
# change to the same IQN you set on the iSCSI target server
InitiatorName=iqn.2016-04.world.srv:www.srv.world
root@www:~# vi /etc/iscsi/iscsid.conf
# line 53: uncomment
node.session.auth.authmethod = CHAP
# line 57,58: 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 restart iscsid open-iscsi
# discover target
root@www:~# iscsiadm -m discovery -t sendtargets -p 10.0.0.30
10.0.0.30:3260,1 iqn.2016-04.world.srv:storage.target00
# confirm status after discovery
root@www:~# iscsiadm -m node -o show
# BEGIN RECORD 2.0-873
node.name = iqn.2016-04.world.srv:storage.target00
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@www:~# iscsiadm -m node --login
Logging in to [iface: default, target: iqn.2016-04.world.srv:storage.target00, portal: 10.0.0.30,3260] (multiple)
Login to [iface: default, target: iqn.2016-04.world.srv:storage.target00, portal: 10.0.0.30,3260] successful.
# confirm the established session
root@www:~# iscsiadm -m session -o show
tcp: [2] 10.0.0.30:3260,1 iqn.2016-04.world.srv:storage.target00 (non-flash)
# confirm the partitions
root@www:~# cat /proc/partitions
major minor #blocks name
1 0 65536 ram0
1 1 65536 ram1
1 2 65536 ram2
.....
.....
252 0 26759168 dm-0
252 1 4194304 dm-1
8 0 10485760 sdb- After setting iSCSI devide, configure on Initiator to use it like follwos.
# added new device provided from the target server as "sdb"
# create label
root@www:~# parted --script /dev/sdb "mklabel msdos"
# create partiton
root@www:~# parted --script /dev/sdb "mkpart primary 0% 100%"
# format with ext4
root@www:~# mkfs.ext4 /dev/sdb1
mke2fs 1.42.13 (17-May-2015)
Creating filesystem with 2619392 4k blocks and 655360 inodes
Filesystem UUID: a344ca52-73a7-4b47-8b2c-f7381be38b76
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
# mount
root@www:~# mount /dev/sdb1 /mnt
root@www:~# df -hT
udev devtmpfs 2.0G 0 2.0G 0% /dev
tmpfs tmpfs 396M 5.6M 390M 2% /run
/dev/mapper/ubuntu--vg-root ext4 25G 1.4G 23G 6% /
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/sda1 ext2 472M 55M 393M 13% /boot
tmpfs tmpfs 100K 0 100K 0% /run/lxcfs/controllers
tmpfs tmpfs 396M 0 396M 0% /run/user/0
/dev/sdb1 ext4 9.8G 23M 9.2G 1% /mnt
# /dev/sdb1 is a remote devicefio test
root@www:~# fio -filename=/dev/sdb1 ...logout & delete target
root@www:~# iscsiadm -m node --targetname IQN(target) --logout
root@www:~# iscsiadm -m node --op delete --targetname IQN(target)參考資料：https://www.server-world.info/en/note?os=Ubuntu_16.04&p=iscsi&f=1