Set up an iscsi storage
From LinuxIntro
iSCSI is a protocol that allows you to connect to block-oriented storage over the IP-network. To have an ISCSI target, you do not need to buy an enterprise-class ISCSI storage, you can start an ISCSI target as service on your computer. This is especially useful when running e.g. cluster tests on shared storage.
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[edit] QuickStart
[edit] SUSE Linux Enterprise server 10
In this chapter, we will set up an ISCSI target and connect to it
[edit] Check your state
See how many block devices you have attached:
hwinfo --block --short
[edit] Set up a target
- start yast2
- chose Miscellaneous->iSCSI target
- continue as instructed, if prompted, allow to install the package iscsitarget
[edit] Set up an initiator
- start yast2
- chose Miscellaneous->iSCSI initiator
- continue as instructed, if prompted, allow to install the package openiscsi
[edit] Check if it worked
See how many block devices you have attached:
hwinfo --block --short
It must be more than before
[edit] generic
In this chapter we will set up an iscsi target and test it by installing an iscsi initiator.
[edit] Set up a target
- Download the latest version of iscsi-target from http://iscsitarget.sourceforge.net/. In this example, we use version 0.4.15.
- Unpack the package you just downloaded
tar xvfz iscsitarget-0.4.15.tar.gz
cd iscsitarget-0.4.15 make && make install
on problems see the article Compiling.
- create a configuration for your service:
/etc/ietd.conf
Target iqn.2007-12.local.net:storage.lvm
Lun 0 Path=/dev/hdb
- start the service
/etc/init.d/iscsi-target start
- verify the service is running
$ lsof -i [...] ietd 8692 root 7u IPv6 36856 TCP *:iscsi-target (LISTEN) ietd 8692 root 8u IPv4 36857 TCP *:iscsi-target (LISTEN)
[edit] Set up an initiator
To set up an iscsi initiator, install the openiscsi package. Then, discover your targets. Let's assume the IP-address of your target is 192.168.0.5
$ iscsiadm -m discovery -t st -p 192.168.0.5 [fa084c] 192.168.0.5:3260,1 iqn.2001-04.com.example:storage.disk2.sys1.xyz [3727f9] 127.0.0.1:3260,1 iqn.2001-04.com.example:storage.disk2.sys1.xyz $ iscsiadm -m node [fa084c] 192.168.0.5:3260,1 iqn.2001-04.com.example:storage.disk2.sys1.xyz [3727f9] 127.0.0.1:3260,1 iqn.2001-04.com.example:storage.disk2.sys1.xyz
You know now you have a target named iqn.2001-04.com.example:storage.disk2.sys1.xyz Now have a look what drives you have attached:
$ hwinfo --block --short disk: /dev/sda VMware Virtual S /dev/sdb IET VIRTUAL-DISK partition: [...]
Now connect your iscsi target:
$ iscsiadm -m node -T iqn.2001-04.com.example:storage.disk2.sys1.xyz -p 192.168.0.5:3260 --login
And find a new device in your list:
$ hwinfo --block --short disk: /dev/sda VMware Virtual S /dev/sdb IET VIRTUAL-DISK /dev/sdc IET VIRTUAL-DISK partition: [...]
