UDEV+MULTIPATH

配置共享存储（multipath+udev）
4.20.1 multipath
##安装multipath
yum install -y device-mapper*
mpathconf --enable --with_multipathd y
##查看共享盘的scsi_id
/usr/lib/udev/scsi_id -g -u /dev/sdb
/usr/lib/udev/scsi_id -g -u /dev/sdc
/usr/lib/udev/scsi_id -g -u /dev/sdd
/usr/lib/udev/scsi_id -g -u /dev/sde
/usr/lib/udev/scsi_id -g -u /dev/sdf

##配置multipath，wwid的值为上面获取的scsi_id，alias可自定义，这里配置3块OCR盘，2块DATA盘
defaults {
user_friendly_names yes
}
这里可以和之前的冲突了

cp /etc/multipath.conf /etc/multipath.conf.bak
sed '/^/s/^/#/' /etc/ntp.conf -i 注释所有的行


cat <<EOF>> /etc/multipath.conf
defaults {
user_friendly_names yes
}

blacklist {
devnode "^sda"
}

multipaths {
multipath {
wwid "36000c29a961f7eb1208473713ca7b007"
alias asm_ocr01
}
multipath {
wwid "36000c29f87ed61db71c60bd3d6e737dc"
alias asm_ocr02
}
multipath {
wwid "36000c297c53b91255620471a6deb6853"
alias asm_ocr03
}
multipath {
wwid "36000c29e516572af5c105d12e8c0db12"
alias asm_data01
}
multipath {
wwid "36000c29d6be6679787ceadf23b29b180"
alias asm_data02
}
}
EOF

激活multipath多路径：
multipath -F
multipath -v2
multipath -ll

重载multipath
systemctl restart multipathd
systemctl status multipathd
multipathd show paths
multipath -ll
cat /etc/multipath/bindings
more /etc/multipath/wwids

4.20.2 UDEV
cd /dev/mapper
for i in asm_*; do
printf "%s %s\n" "$i" "$(udevadm info --query=all --name=/dev/mapper/"$i" | grep -i dm_uuid)" >>/dev/mapper/udev_info
done
while read -r line; do
dm_uuid=$(echo "$line" | awk -F'=' '{print $2}')
disk_name=$(echo "$line" | awk '{print $1}')
echo "KERNEL==\"dm-*\",ENV{DM_UUID}==\"${dm_uuid}\",SYMLINK+=\"${disk_name}\",OWNER=\"grid\",GROUP=\"asmadmin\",MODE=\"0660\"" >>/etc/udev/rules.d/99-oracle-asmdevices.rules
done < /dev/mapper/udev_info
##重载udev
udevadm control --reload-rules
udevadm trigger --type=devices


[root@oracle19c-rac2 dev]# more /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="dm-*",ENV{DM_UUID}=="mpath-36000c29e516572af5c105d12e8c0db12",SYMLINK+="asm_data01",OWNER="grid",GROUP="asmadmin",MODE="0660"
KERNEL=="dm-*",ENV{DM_UUID}=="mpath-36000c29d6be6679787ceadf23b29b180",SYMLINK+="asm_data02",OWNER="grid",GROUP="asmadmin",MODE="0660"
KERNEL=="dm-*",ENV{DM_UUID}=="mpath-36000c29a961f7eb1208473713ca7b007",SYMLINK+="asm_ocr01",OWNER="grid",GROUP="asmadmin",MODE="0660"
KERNEL=="dm-*",ENV{DM_UUID}=="mpath-36000c29f87ed61db71c60bd3d6e737dc",SYMLINK+="asm_ocr02",OWNER="grid",GROUP="asmadmin",MODE="0660"
KERNEL=="dm-*",ENV{DM_UUID}=="mpath-36000c297c53b91255620471a6deb6853",SYMLINK+="asm_ocr03",OWNER="grid",GROUP="asmadmin",MODE="0660"
[root@oracle19c-rac2 dev]#

4.20.2 UDEV(非multipath）

for i in b c d e f g h i ;
do
echo "KERNEL==\"sd*\", ENV{DEVTYPE}==\"disk\", SUBSYSTEM==\"block\", PROGRAM==\"/usr/lib/udev/scsi_id -g -u -d \$devnode\",
RESULT==\"`/lib/udev/scsi_id -g -u -d /dev/sd$i`\", SYMLINK+=\"asm-disk$i\", OWNER=\"grid\", GROUP=\"asmadmin\", MODE=
\"0660\"" >> /etc/udev/rules.d/99-oracle-asmdevices.rules
done

# 加载rules文件,重新加载udev rule
/sbin/udevadm control --reload
# 检查新的设备名称
/sbin/udevadm trigger --type=devices --action=change
# 诊断udev rule
/sbin/udevadm test /sys/block/*


用脚本生成udev 配置：

for i in b c d e f;
do
echo "KERNEL==/"sd*/",ENV{DEVTYPE}==/"disk/",SUBSYSTEM==/"block/",PROGRAM==/"/usr/lib/udev/scsi_id -g -u -d /$devnode/",RESULT==/"`/usr/lib/udev/scsi_id -g -u /dev/sd$i`/", RUN+=/"/bin/sh -c 'mknod /dev/asmdisk$i b /$major /$minor; chown grid:asmadmin /dev/asmdisk$i; chmod 0660 /dev/asmdisk$i'/""
done
将脚本内容写入/etc/udev/rules.d/99-oracle-asmdevices.rules 文件。

[root@rac1 software]# vim /etc/udev/rules.d/99-oracle-asmdevices.rules
[root@rac1 software]# cat /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="sd*",ENV{DEVTYPE}=="disk",SUBSYSTEM=="block",PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode",RESULT=="36000c29cf5ef7bd3907344106bcca59b", RUN+="/bin/sh -c 'mknod /dev/asmdiskb b $major $minor; chown grid:asmadmin /dev/asmdiskb; chmod 0660 /dev/asmdiskb'"
KERNEL=="sd*",ENV{DEVTYPE}=="disk",SUBSYSTEM=="block",PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode",RESULT=="36000c293ef1e02395716263ee17e8926", RUN+="/bin/sh -c 'mknod /dev/asmdiskc b $major $minor; chown grid:asmadmin /dev/asmdiskc; chmod 0660 /dev/asmdiskc'"
KERNEL=="sd*",ENV{DEVTYPE}=="disk",SUBSYSTEM=="block",PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode",RESULT=="36000c29a790b610473d4800954053180", RUN+="/bin/sh -c 'mknod /dev/asmdiskd b $major $minor; chown grid:asmadmin /dev/asmdiskd; chmod 0660 /dev/asmdiskd'"
KERNEL=="sd*",ENV{DEVTYPE}=="disk",SUBSYSTEM=="block",PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode",RESULT=="36000c292fe31e2c5ec2cf689791c09d7", RUN+="/bin/sh -c 'mknod /dev/asmdiske b $major $minor; chown grid:asmadmin /dev/asmdiske; chmod 0660 /dev/asmdiske'"
KERNEL=="sd*",ENV{DEVTYPE}=="disk",SUBSYSTEM=="block",PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode",RESULT=="36000c29c87abcc922d24e7bc0e2978a7", RUN+="/bin/sh -c 'mknod /dev/asmdiskf b $major $minor; chown grid:asmadmin /dev/asmdiskf; chmod 0660 /dev/asmdiskf'"
KERNEL=="sd*",ENV{DEVTYPE}=="disk",SUBSYSTEM=="block",PROGRAM=="/usr/lib/udev/scsi_id -g -u -d $devnode",RESULT=="36000c297ede8a5b0a407451699668920", RUN+="/bin/sh -c 'mknod /dev/asmdiskg b $major $minor; chown grid:asmadmin /dev/asmdiskg; chmod 0660 /dev/asmdiskg'"


让UDEV生效：/sbin/udevadm trigger —type=devices —action=change

or

KERNEL=="sdb", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$name",RESULT=="360003ff44dc75adc8cec9cce0033f402", OWNER="grid",
GROUP="asmadmin", MODE="0660"
KERNEL=="sdc", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$name",RESULT=="360003ff44dc75adc9ba684d395391bae", OWNER="grid",
GROUP="asmadmin", MODE="0660

ll /dev/asm*