UDEV替代ASMLIB

1.确认在所有RAC节点上已经安装了必要的UDEV包


[root@rh2 ~]# rpm -qa|grep udev
udev-095-14.21.el5


2.通过scsi_id获取设备的块设备的唯一标识名，假设系统上已有LUN sdc-sdp


for i in c d e f g h i j k l m n o p ;
do
echo "sd$i" "`scsi_id -g -u -s /block/sd$i` ";
done


sdc 1IET_00010001
sdd 1IET_00010002
sde 1IET_00010003
sdf 1IET_00010004
sdg 1IET_00010005
sdh 1IET_00010006
sdi 1IET_00010007
sdj 1IET_00010008
sdk 1IET_00010009
sdl 1IET_0001000a
sdm 1IET_0001000b
sdn 1IET_0001000c
sdo 1IET_0001000d
sdp 1IET_0001000e 


以上列出于块设备名对应的唯一标识名


3.创建必要的UDEV配置文件，


首先切换到配置文件目录


[root@rh2 ~]# cd /etc/udev/rules.d


定义必要的规则配置文件


[root@rh2 rules.d]# touch 99-oracle-asmdevices.rules 

基于Linux5
[root@rh2 rules.d]# cat 99-oracle-asmdevices.rules
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010001", NAME="ocr1", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010002", NAME="ocr2", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010003", NAME="asm-disk1",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010004", NAME="asm-disk2",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010005", NAME="asm-disk3",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010006", NAME="asm-disk4",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010007", NAME="asm-disk5",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010008", NAME="asm-disk6",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_00010009", NAME="asm-disk7",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_0001000a", NAME="asm-disk8",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_0001000b", NAME="asm-disk9",  OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_0001000c", NAME="asm-disk10", OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_0001000d", NAME="asm-disk11", OWNER="grid",  GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="1IET_0001000e", NAME="asm-disk12", OWNER="grid",  GROUP="asmadmin", MODE="0660"

基于Linux6
[root@node1 dev]# vi /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name", RESULT=="36000c29a5102ddf9fca9686196989590", NAME="ocr1", OWNER="grid", GROUP="asmadmin", MODE="0660"
或者
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c29a2d3a60a0006886e760fc1db0", NAME="ocr_vote1", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c2936bd96c1806b14acaee56ee33", NAME="ocr_vote2", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c29029e2fd2f3d4de632d162cb0b", NAME="ocr_vote3", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c29a847fd0448ba35978ebfeea4d", NAME="data1", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c29124ad6529e2bb43846fc8091e", NAME="data2", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c29b02bdf234bc4f67029237ea98", NAME="rcy1", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --device=/dev/$name", RESULT=="36000c29e1284eb2640af72bbbd446183", NAME="rcy2", OWNER="grid", GROUP="asmadmin", MODE="0660"

其中LINUX6.5必须使用以下参数配置
[root@node1 dev]# vi /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id --whitelisted --replace-whitespace --device=/dev/$name", RESULT=="36000c29a5102ddf9fca9686196989590", NAME="ocr1", OWNER="grid", GROUP="asmadmin", MODE="0660"

Result 为/sbin/scsi_id -g -u -s %p的输出--Match the returned string of the last PROGRAM call. This key may be
used in any following rule after a PROGRAM call.
按顺序填入刚才获取的唯一标识名即可


OWNER为安装Grid Infrastructure的用户，在11gr2中一般为grid，GROUP为asmadmin
MODE采用0660即可


NAME为UDEV映射后的设备名，
建议为OCR和VOTE DISK创建独立的DISKGROUP，为了容易区分将该DISKGROUP专用的设备命名为ocr1..ocrn的形式
其余磁盘可以根据其实际用途或磁盘组名来命名


4.将该规则文件拷贝到其他节点上
[root@rh2 rules.d]# scp 99-oracle-asmdevices.rules Other_node:/etc/udev/rules.d


5.在所有节点上启动udev服务，或者重启服务器即可

基于Linux5
[root@rh2 rules.d]# /sbin/udevcontrol reload_rules
[root@rh2 rules.d]# /sbin/start_udev
Starting udev:                                            [  OK  ]
基于Linux6
[root@rh2 rules.d]# /sbin/udevadm control --reload_rules
[root@rh2 rules.d]# /sbin/start_udev
Starting udev:                                            [  OK  ]

6.检查设备是否到位


[root@rh2 rules.d]# cd /dev
[root@rh2 dev]# ls -l ocr*
brw-rw---- 1 grid asmadmin 8, 32 Jul 10 17:31 ocr1
brw-rw---- 1 grid asmadmin 8, 48 Jul 10 17:31 ocr2


[root@rh2 dev]# ls -l asm-disk*
brw-rw---- 1 grid asmadmin 8,  64 Jul 10 17:31 asm-disk1
brw-rw---- 1 grid asmadmin 8, 208 Jul 10 17:31 asm-disk10
brw-rw---- 1 grid asmadmin 8, 224 Jul 10 17:31 asm-disk11
brw-rw---- 1 grid asmadmin 8, 240 Jul 10 17:31 asm-disk12
brw-rw---- 1 grid asmadmin 8,  80 Jul 10 17:31 asm-disk2
brw-rw---- 1 grid asmadmin 8,  96 Jul 10 17:31 asm-disk3
brw-rw---- 1 grid asmadmin 8, 112 Jul 10 17:31 asm-disk4
brw-rw---- 1 grid asmadmin 8, 128 Jul 10 17:31 asm-disk5
brw-rw---- 1 grid asmadmin 8, 144 Jul 10 17:31 asm-disk6
brw-rw---- 1 grid asmadmin 8, 160 Jul 10 17:31 asm-disk7
brw-rw---- 1 grid asmadmin 8, 176 Jul 10 17:31 asm-disk8
brw-rw---- 1 grid asmadmin 8, 192 Jul 10 17:31 asm-disk9


补充：
直接获取 /etc/udev/rules.d/99-oracle-asmdevices.rules的文件信息

for i in b c d e f g h i j k ;
do
echo "KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="`scsi_id -g -u -s /block/sd$i`", NAME="asm-disk$i", OWNER="grid", GROUP="asmadmin", MODE="0660""
done

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