在oracle RAC中配置udev绑定磁盘规则的方法

The examples are all done using Oracle Linux 5, 6, 7 and 8 so they will be consistent with RHEL and CentOS 5, 6, 7 and 8.

 

Identify the Disks (/sbin/scsi_id)
We are going to write device-specific rules, so we need to be able to identify each device consistently, irrespective of the order in which Linux discovers it. To do this we are going to use the SCSI ID for each disk (not the partition), which we get using the scsi_id command. The "-s" option makes the paths relative to the "/sys" directory. For Oracle Linux 5, use the following command.需要要root用户下查看。

# /sbin/scsi_id -g -u -s /block/sdb
SATA_VBOX_HARDDISK_VBd306dbe0-df3367e3_

 

The "-s" is not available in Oracle Linux 6, so you must use the following syntax.

# /sbin/scsi_id -g -u -d /dev/sdb
SATA_VBOX_HARDDISK_VBd306dbe0-df3367e3_
# /sbin/scsi_id -g -u -d /dev/sdc
SATA_VBOX_HARDDISK_VB46dec7e0-192e8000_
# /sbin/scsi_id -g -u -d /dev/sdd
SATA_VBOX_HARDDISK_VBce8c63bb-ac67a172_
# /sbin/scsi_id -g -u -d /dev/sde
SATA_VBOX_HARDDISK_VB7437a3b7-95b199cd_
#

The location of the scsi_id command has changed in Oracle Linux 7 and 8, so you must use the following syntax.

# /usr/lib/udev/scsi_id -g -u -d /dev/sdb
SATA_VBOX_HARDDISK_VBd306dbe0-df3367e3_
# /usr/lib/udev/scsi_id -g -u -d /dev/sdc
SATA_VBOX_HARDDISK_VB46dec7e0-192e8000_
# /usr/lib/udev/scsi_id -g -u -d /dev/sdd
SATA_VBOX_HARDDISK_VBce8c63bb-ac67a172_
# /usr/lib/udev/scsi_id -g -u -d /dev/sde
SATA_VBOX_HARDDISK_VB7437a3b7-95b199cd_

 

Make SCSI Devices Trusted
Add the following to the "/etc/scsi_id.config" file to configure SCSI devices as trusted. Create the file if it doesn't already exist.

options=-g

Create UDEV Rules File
Create the "/etc/udev/rules.d/99-oracle-asmdevices.rules" file.

# vi /etc/udev/rules.d/99-oracle-asmdevices.rules
The file should contain the following lines for Oracle Linux 5. The PROGRAM parameter must match the command you used to retrieve the SCSI ID, and the RESULT parameter must match the value returned from your disks.

KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s /block/$parent", RESULT=="SATA_VBOX_HARDDISK_VBd306dbe0-df3367e3_", NAME="asm-disk1", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s /block/$parent", RESULT=="SATA_VBOX_HARDDISK_VB46dec7e0-192e8000_", NAME="asm-disk2", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s /block/$parent", RESULT=="SATA_VBOX_HARDDISK_VBce8c63bb-ac67a172_", NAME="asm-disk3", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s /block/$parent", RESULT=="SATA_VBOX_HARDDISK_VB7437a3b7-95b199cd_", NAME="asm-disk4", OWNER="oracle", GROUP="dba", MODE="0660"

The equivalent for Oracle Linux 6 is shown below.

KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VBd306dbe0-df3367e3_", NAME="asm-disk1", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VB46dec7e0-192e8000_", NAME="asm-disk2", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VBce8c63bb-ac67a172_", NAME="asm-disk3", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VB7437a3b7-95b199cd_", NAME="asm-disk4", OWNER="oracle", GROUP="dba", MODE="0660"

The equivalent for Oracle Linux 7 and 8 is shown below.

KERNEL=="sd?1", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VBd306dbe0-df3367e3_", SYMLINK+="asm-disk1", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VB46dec7e0-192e8000_", SYMLINK+="asm-disk2", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VBce8c63bb-ac67a172", SYMLINK+="asm-disk3", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="sd?1", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$parent", RESULT=="SATA_VBOX_HARDDISK_VB7437a3b7-95b199cd_", SYMLINK+="asm-disk4", OWNER="oracle", GROUP="dba", MODE="0660"

Load Updated Block Device Partitions (/sbin/partprobe)
Load updated block device partition tables.

# #OL5, OL6 and OL77
# /sbin/partprobe /dev/sdb1
# /sbin/partprobe /dev/sdc1
# /sbin/partprobe /dev/sdd1
# /sbin/partprobe /dev/sde1

# #OL8
/sbin/partx -u /dev/sbc1
/sbin/partx -u /dev/sdc1
/sbin/partx -u /dev/sdd1
/sbin/partx -u /dev/sde1

Restart UDEV Service
Restart the UDEV service.

# #OL5
# /sbin/udevcontrol reload_rules

# #OL6, OL7 and OL8
# /sbin/udevadm control --reload-rules

# #OL5 and OL6 : Not needed for OL7 and OL8
# /sbin/start_udev

 

Check Ownership and Permissions
Check the disks are now available with the "asm-disk*" alias and the correct ownership and permissions.

# cd /dev
# ls -al asm-disk*
brw-rw---- 1 oracle dba 8, 17 Apr 8 22:47 asm-disk1
brw-rw---- 1 oracle dba 8, 33 Apr 8 22:47 asm-disk2
brw-rw---- 1 oracle dba 8, 49 Apr 8 22:47 asm-disk3
brw-rw---- 1 oracle dba 8, 65 Apr 8 22:47 asm-disk4

 第1台RAC添加磁盘后，第2台RAC同样操作再加一次。

 

https://oracle-base.com/articles/linux/udev-scsi-rules-configuration-in-oracle-linux