iscsi udev file

Create the following rules file /etc/udev/rules.d/55-openiscsi.rules on the client node linux3:

# /etc/udev/rules.d/55-openiscsi.rules
KERNEL=="sd*", BUS=="scsi", PROGRAM="/etc/udev/scripts/iscsidev.sh %b",SYMLINK+="iscsi/%c/part%n"

Next, create the UNIX SHELL script that will be called when this event is received. Let's first create a separate directory on the linux3 node where udev scripts can be stored:

[root@linux3 ~]# mkdir -p /etc/udev/scripts

Finally, create the UNIX shell script /etc/udev/scripts/iscsidev.sh:

#!/bin/sh

# FILE: /etc/udev/scripts/iscsidev.sh

BUS=${1}
HOST=${BUS%%:*}

[ -e /sys/class/iscsi_host ] || exit 1

file="/sys/class/iscsi_host/host${HOST}/device/session*/iscsi_session*/targetname"

target_name=$(cat ${file})

# This is not an open-scsi drive
if [ -z "${target_name}" ]; then
   exit 1
fi

# Check if QNAP drive
check_qnap_target_name=${target_name%%:*}
if [ $check_qnap_target_name = "iqn.2004-04.com.qnap" ]; then
    target_name=`echo "${target_name%.*}"`
fi

echo "${target_name##*.}"

After creating the UNIX SHELL script, change it to executable:

[root@linux3 ~]# chmod 755 /etc/udev/scripts/iscsidev.sh

Now that udev is configured, restart the iSCSI initiator service:

[root@linux3 ~]# service iscsi stop
Logging out of session [sid: 3, target: iqn.2006-01.com.openfiler:scsi.linux3-data-1, portal: 192.168.2.195,3260]
Logout of [sid: 3, target: iqn.2006-01.com.openfiler:scsi.linux3-data-1, portal: 192.168.2.195,3260]: successful
Stopping iSCSI daemon: /etc/init.d/iscsi: line 33:  5143 Killed                  /etc/init.d/iscsid stop


[root@linux3 ~]# service iscsi start
iscsid dead but pid file exists
Turning off network shutdown. Starting iSCSI daemon: [  OK  ]
[  OK  ]
Setting up iSCSI targets: Logging in to [iface: default, target: iqn.2006-01.com.openfiler:scsi.linux3-data-1, portal: 192.168.2.195,3260]
Login to [iface: default, target: iqn.2006-01.com.openfiler:scsi.linux3-data-1, portal: 192.168.2.195,3260]: successful
[  OK  ]

Let's see if our hard work paid off:

[root@linux3 ~]# ls -l /dev/iscsi/
total 0
drwxr-xr-x 2 root root 60 Apr  7 01:57 linux3-data-1

[root@linux3 ~]# ls -l /dev/iscsi/linux3-data-1/
total 0
lrwxrwxrwx 1 root root 9 Apr  7 01:57 part -> ../../sda

http://www.idevelopment.info/data/Unix/Linux/LINUX_ConnectingToAniSCSITargetWithOpen-iSCSIInitiatorUsingLinux.shtml

如果需要挂载为裸设备看如下文章:

rhel5挂载为裸设备