redhat linux 7 创建udev

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本文介绍如何使用Linux脚本查找磁盘的UUID，并通过编辑UDEV规则文件为特定UUID的磁盘创建对应的设备节点，确保Oracle ASM磁盘组能够正确识别磁盘。

查找磁盘的UUID

for i in a b c d e f
do
/usr/lib/udev/scsi_id -g -u -d /dev/sddlma$i
done

360060e801252ed00504052ed00000500
360060e801252ed00504052ed00000501
360060e801252ed00504052ed00000502
360060e801252ed00504052ed00000503
360060e801252ed00504052ed00000504
360060e801252ed00504052ed00000505

编辑 UDEV Rules File

vi /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode", RESULT=="360060e801252ed00504052ed00000500", RUN+="/bin/sh -c 'mknod /dev/asmdisk1 b $major $minor; chown grid:asmadmin /dev/asmdisk1; chmod 0660 /dev/asmdisk1'"
KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode", RESULT=="360060e801252ed00504052ed00000501", RUN+="/bin/sh -c 'mknod /dev/asmdisk2 b $major $minor; chown grid:asmadmin /dev/asmdisk2; chmod 0660 /dev/asmdisk2'"
KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode", RESULT=="360060e801252ed00504052ed00000502", RUN+="/bin/sh -c 'mknod /dev/asmdisk3 b $major $minor; chown grid:asmadmin /dev/asmdisk3; chmod 0660 /dev/asmdisk3'"
KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode", RESULT=="360060e801252ed00504052ed00000503", RUN+="/bin/sh -c 'mknod /dev/asmdisk4 b $major $minor; chown grid:asmadmin /dev/asmdisk4; chmod 0660 /dev/asmdisk4'"
KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode", RESULT=="360060e801252ed00504052ed00000504", RUN+="/bin/sh -c 'mknod /dev/asmdisk5 b $major $minor; chown grid:asmadmin /dev/asmdisk5; chmod 0660 /dev/asmdisk5'"
KERNEL=="sd*[!0-9]", ENV{DEVTYPE}=="disk", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode", RESULT=="360060e801252ed00504052ed00000505", RUN+="/bin/sh -c 'mknod /dev/asmdisk6 b $major $minor; chown grid:asmadmin /dev/asmdisk6; chmod 0660 /dev/asmdisk6'"

Load updated block device partition tables.

for i in a b c d e f
do
/sbin/partprobe /dev/sddlma$i
done

for i in a b c d e f
do
/sbin/udevadm test /block/sddlma$i
done

启动udev

/sbin/udevadm trigger –type=devices –action=change

查看磁盘

ls /dev/asm*