Sunday, September 28, 2014

RHEL / CentOS 6 - How to setup iscsi target and initiator ?

How to setup ISCSI Target?

Server Side

1) Install scsi-target-utils using yum

yum -y install scsi-target-utils

2) Edit iSCSI target configuration

vim /etc/tgt/targets.conf

initiator-address              ##Initiator IP/Name
incominguser myuser redhat                    ##Username = myuser and password = redhat

"" ##Can be anything

There are 2 types of storage devices:

backing-store - defines a virtual device on the target.

direct-store  - defines a direct mapped device with the same properties as the physical device (such as VENDOR_ID, SERIAL_NUM, etc.)

3) Start iSCSI target and on boot

service tgtd start

Start on boot

chkconfig tgtd on

4) Enable 3260 port at firewall

5) Check iSCSI target configuration

tgtadm --mode target --op show

6) Check if everything works as expected

tgt-admin -s

How to setup iSCSI initiator?

Client Side

1) Install iscsi-initiator-utils using yum

yum -y install iscsi-initiator-utils

2) Edit initiator configuration file

vim /etc/iscsi/initiatorname.iscsi

3) Edit iscsi client configuration /etc/iscsi/iscsid.conf

node.session.auth.authmethod = CHAP
node.session.auth.username = manoj
node.session.auth.password = redhat

4) Start iscsi client service

service iscsid start

5) Start iscsi client on boot

chkconfig iscsid on

6) Discovering targets in our iSCSI server

iscsiadm -m discovery -t st --portal Target-server-IP

7) Login with iSCSI LUN

iscsiadm -m node --targetname --portal Target-Server-IP --login

8) Checking session status with the target

iscsiadm --mode session --op show

Thats it!!

Please do not forget to update with your feedback :-)

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