Rh436-configure the iscsi shared disk name and permissions through udev (rhel5.5)

Configure the iscsi shared disk name through udev: [root @ localhost ~] # Udevinfo-qpath-n/dev/sdb/block/sdb [root @ localhost ~] #/Sbin/scsi_id-g-s/block/sdb1IET00020001 [root @ localhost ~] # Vim/etc/ud

Configure the iscsi shared disk name through udev:

[Root @ localhost ~] # Udevinfo-q path-n/dev/sdb
/Block/sdb
[Root @ localhost ~] #/Sbin/scsi_id-g-s/block/sdb
1IET 00020001
[Root @ localhost ~] # Vim/etc/udev/rules. d/99-iscsi.rules
KERNEL = "sd *", PROGRAM = "/sbin/scsi_id-g-s % p", RESULT = "1IET 00020001", NAME = "sharedisk % n"
[Root @ localhost ~] # Vim/etc/udev/rules. d/99-myiscsi.rules
[Root @ localhost ~] # Service iscsi restart
Logging out of session [sid: 1, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]
Logout of [sid: 1, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]: successful
Stopping iSCSI daemon:
Iscsid dead but pid file exists [OK]
Starting iSCSI daemon: [OK]
[OK]
Setting up iSCSI targets: Logging in to [iface: default, target: iqn.2012-05.com. example: ex333server. demo, portal: 192.168.221.254, 3260]
Logging in to [iface: default, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]
Login to [iface: default, target: iqn.2012-05.com. example: ex333server. demo, portal: 192.168.221.254, 3260]: successful
Login to [iface: default, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]: successful
[OK]
[Root @ localhost ~] # Fdisk-l

Disk/dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065*512 = 8225280 bytes

Device Boot Start End Blocks Id System
/Dev/sda1*1 25 200781 83 Linux
/Dev/sda2 26 1330 10482412 + 83 Linux
/Dev/sda3 1331 1591 2096482 + 82 Linux swap/Solaris

Disk/dev/sdb: 4 MB, 4194304 bytes
1 heads, 8 sectors/track, 1024 cylinders
Units = cylinders of 8*512 = 4096 bytes

Disk/dev/sdb doesn' t contain a valid partition table
[Root @ localhost ~] # Fdisk-l/dev/sharedisk

Disk/dev/sharedisk: 4 Mbit/s, 4194304 bytes
1 heads, 8 sectors/track, 1024 cylinders
Units = cylinders of 8*512 = 4096 bytes

Disk/dev/sharedisk doesn't contain a valid partition table
[Root @ localhost ~] #

Fdisk-l lists the default system disk names. to list the given disk terms, you must write them all (fdisk-l/dev/sharedisk ).

Configure the iscsi shared disk permissions:

[Root @ localhost rules. d] # cat/etc/passwd | grep nobody
Nobody: x: 99: 99: Nobody: // sbin/nologin
[Root @ localhost rules. d] # vim 99-myiscsi.rules
KERNEL = "sd *", PROGRAM = "/sbin/scsi_id-g-s % p", RESULT = "1IET 00020001", SYMLINK + = "sharedisk % n ", OWNER = "nobody", GROUP = "nobody", MODE = "0660"
[Root @ localhost rules. d] # service iscsi restart
Logging out of session [sid: 1, target: iqn.2012-05.com. example: ex333server. demo, portal: 192.168.221.254, 3260]
Logging out of session [sid: 2, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]
Logout of [sid: 1, target: iqn.2012-05.com. example: ex333server. demo, portal: 192.168.221.254, 3260]: successful
Logout of [sid: 2, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]: successful
Stopping iSCSI daemon:
Iscsid dead but pid file exists [OK]
Starting iSCSI daemon: [OK]
[OK]
Setting up iSCSI targets: Logging in to [iface: default, target: iqn.2012-05.com. example: ex333server. demo, portal: 192.168.221.254, 3260]
Logging in to [iface: default, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]
Login to [iface: default, target: iqn.2012-05.com. example: ex333server. demo, portal: 192.168.221.254, 3260]: successful
Login to [iface: default, target: iqn.2012-05.com. example: ex333server.tar get244, portal: 192.168.221.254, 3260]: successful
[OK]
[Root @ localhost rules. d] # fdisk-l

Disk/dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065*512 = 8225280 bytes

Device Boot Start End Blocks Id System
/Dev/sda1*1 25 200781 83 Linux
/Dev/sda2 26 1330 10482412 + 83 Linux
/Dev/sda3 1331 1591 2096482 + 82 Linux swap/Solaris

Disk/dev/sdb: 4 MB, 4194304 bytes
1 heads, 8 sectors/track, 1024 cylinders
Units = cylinders of 8*512 = 4096 bytes

Disk/dev/sdb doesn' t contain a valid partition table

Disk/dev/sdc: 4 MB, 4194304 bytes
1 heads, 8 sectors/track, 1024 cylinders
Units = cylinders of 8*512 = 4096 bytes

Disk/dev/sdc doesn' t contain a valid partition table
[Root @ localhost rules. d] # fdisk-l/dev/sharedisk

Disk/dev/sharedisk: 4 Mbit/s, 4194304 bytes
1 heads, 8 sectors/track, 1024 cylinders
Units = cylinders of 8*512 = 4096 bytes

Disk/dev/sharedisk doesn't contain a valid partition table
[Root @ localhost rules. d] # ll/dev/sh
Sharedisk shm/
[Root @ localhost rules. d] # ll/dev/sharedisk
Lrwxrwxrwx 1 root 3 May 27/dev/sharedisk-> sdc
[Root @ localhost rules. d] # ll/dev/sd *
Brw-r ----- 1 root disk 8, 0 May 26 21:26/dev/sda
Brw-r ----- 1 root disk 8, 1 May 26 21:26/dev/sda1
Brw-r ----- 1 root disk 8, 2 May 26 21:26/dev/sda2
Brw-r ----- 1 root disk 8, 3 May 26 21:26/dev/sda3
Brw-r ----- 1 root disk 8, 16 May 27/dev/sdb
Brw-rw ---- 1 nobody 8, 32 May 27/dev/sdc
[Root @ localhost rules. d] #

The permissions for connecting to sharedisk have not changed, but the sdc permissions it directs to have become what we need.

Note: Do not confuse the double equals and single equals signs. All values equal to the following values must be enclosed in double quotation marks,
At the beginning, I didn't use double quotation marks when writing the MODE option (MODE = 0660). The result permission is always-rw-r -----,
It is inherited from umask (0022), but the permission to restart the iscsi service by umask is not followed by umask,
Change it to a pair with quotation marks (MODE = "0660"). Then, restart the iscsi service and the permission is normal.