iSCSI : Configure iSCSI Initiator2023/12/27

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:~ #

vi /etc/iscsi.conf

# create new

target01 {
    # target IP address
    targetaddress = 10.0.0.30;
    # target IQN
    targetname = "iqn.2023-12.world.srv:dlp.target01";
    authmethod = CHAP;
    # CHAP login-name you set on target
    chapiname = "username";
    # CHAP password you set on target
    chapsecret = "userpassword";
}

root@node01:~ #

echo 'iscsid_enable="YES"' >> /etc/rc.conf

root@node01:~ #

echo 'iscsictl_enable="YES"' >> /etc/rc.conf

root@node01:~ #

service iscsid start

Starting iscsid.

# login to target
# iscsictl -A -p (target IP) -t (target IQN) -u (CHAP login-name) -s (CHAP password)

root@node01:~ #

iscsictl -A -p 10.0.0.30 -t iqn.2023-12.world.srv:dlp.target01 -u username -s userpassword

da0 at iscsi1 bus 0 scbus6 target 0 lun 0
da0: <FREEBSD CTLDISK 0001> Fixed Direct Access SPC-5 SCSI device
da0: Serial Number MYSERIAL0000
da0: 150.000MB/s transfers
da0: Command Queueing enabled
da0: 10240MB (20971520 512 byte sectors)

# confirm established sessions

root@node01:~ #

iscsictl -L

Target name                          Target portal    State
iqn.2023-12.world.srv:dlp.target01   10.0.0.30        Connected: da0

root@node01:~ #

ls -l /dev/da0

crw-r-----  1 root operator - 0x75 Dec 27 11:06 /dev/da0

root@node01:~ #

geom disk list da0

Geom name: da0
Providers:
1. Name: da0
   Mediasize: 10737418240 (10G)
   Sectorsize: 512
   Stripesize: 16384
   Stripeoffset: 0
   Mode: r0w0e0
   descr: FREEBSD CTLDISK
   lunname: FREEBSD MYDEVID0000
   lunid: FREEBSD MYDEVID0000
   ident: MYSERIAL0000
   rotationrate: 0
   fwsectors: 63
   fwheads: 255

# to disconnect an established session, do like follows

root@node01:~ #

iscsictl -R -p 10.0.0.30 -t iqn.2023-12.world.srv:dlp.target01

da0 at iscsi1 bus 0 scbus6 target 0 lun 0
da0: <FREEBSD CTLDISK 0001> s/n MYSERIAL0000 detached

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

# create UFS partition with GPT

root@node01:~ #

gpart create -s GPT da0

da0 created
root@node01:~ #

gpart add -t freebsd-ufs da0

da0p1 added

root@node01:~ #

gpart show da0

=>      40  20971440  da0  GPT  (10G)
        40        24       - free -  (12K)
        64  20971392    1  freebsd-ufs  (10G)
  20971456        24       - free -  (12K)

root@node01:~ #

newfs /dev/da0p1

/dev/da0p1: 10239.9MB (20971392 sectors) block size 32768, fragment size 4096
        using 17 cylinder groups of 625.22MB, 20007 blks, 80128 inodes.
super-block backups (for fsck_ffs -b #) at:
 192, 1280640, 2561088, 3841536, 5121984, 6402432, 7682880, 8963328, 10243776, 11524224, 12804672, 14085120, 15365568,
 16646016, 17926464, 19206912, 20487360

root@node01:~ #

mkdir /home/target01

root@node01:~ #

mount /dev/da0p1 /home/target01

root@node01:~ #

df -hT /home/target01

Filesystem  Type    Size    Used   Avail Capacity  Mounted on
/dev/da0p1  ufs     9.7G    8.0K    8.9G     0%    /home/target01

# if setting in fstab, add [late] option

root@node01:~ #

vi /etc/fstab

# Device                Mountpoint      FStype  Options         Dump    Pass#
/dev/gpt/efiboot0               /boot/efi       msdosfs rw              2       2
/dev/vtbd0p3            none    swap    sw              0       0
/dev/da0p1              /home/target01  ufs     rw,late 0       0

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