iSCSI on Debian

My Notes for installing iSCSI on debian, will probably hold true for Ubuntu and other distros..

Install Open-iSCSI Initiator

Type the following command at a shell prompt:

$ sudo apt-get install open-iscsi

Open-iSCSI default configuration

You need to soft-link (path fix) two files for autologin to work i.e. fix file paths for iscsiadm, enter:

ln -s /etc/{iscsid.conf,initiatorname.iscsi} /etc/iscsi/

Default configuration file could be located at /etc/iscsi/iscsid.conf or ~/.iscsid.conf. Open /etc/iscsi/iscsid.conf file:

# nano /etc/iscsi/iscsid.conf

Set node.session.auth.username, node.session.auth.password and other parameter as follows:

node.startup = automatic

node.session.auth.username = MY-ISCSI-USER

node.session.auth.password = MY-ISCSI-PASSWORD

discovery.sendtargets.auth.username = MY-ISCSI-USER

discovery.sendtargets.auth.password = MY-ISCSI-PASSWORD

node.session.timeo.replacement_timeout = 120

node.conn[0].timeo.login_timeout = 15

node.conn[0].timeo.logout_timeout = 15

node.conn[0].timeo.noop_out_interval = 10

node.conn[0].timeo.noop_out_timeout = 15

node.session.iscsi.InitialR2T = No

node.session.iscsi.ImmediateData = Yes

node.session.iscsi.FirstBurstLength = 262144

node.session.iscsi.MaxBurstLength = 16776192

node.conn[0].iscsi.MaxRecvDataSegmentLength = 65536

Save and close the file. Restart open-iscsi service:

# /etc/init.d/open-iscsi restart

Now you need to run a discovery against the iscsi target host:

# iscsiadm -m discovery -t sendtargets -p ISCSI-SERVER-IP-ADDRESS

If 192.168.1.60 is iSCSI server IP address, enter:

# iscsiadm -m discovery -t sendtargets -p 192.168.1.60

OR

# iscsiadm –mode discovery –type sendtargets –portal 192.168.1.60

Note down the record id (such as iqn.2001-05.com.doe:test) found by the discovery. You need the same for login. Login, must use a node record id found by the discovery:

# iscsiadm –mode node –targetname iqn.2001-05.com.doe:test –portal 192.168.1.60:3260 –login

Finally restart the service again:

# /etc/init.d/open-iscsi restart

Format iSCSI Volume

Now you should see an additional drive on the system such as /dev/sdc. Use /var/log/messages file to find out device name:

# tail -f /var/log/messages

If your device name is /dev/sdc, enter the following command to create a partition:

# fdisk /dev/sdc

Next format partition:

# mkfs.ext3 /dev/sdc1

Mount file system:

# mkdir /iscsi

# mount /dev/sdc1 /iscsi

Enjoy 🙂

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