Redhat Linux 7 建立UDEV設備

RHEL7下的udev管理與以前的版本有必定的區別，下面簡單介紹了基於LVM的UDEV配置。
一、建立邏輯卷

[root@hdp06 ~]# pvcreate /dev/sdb
[root@hdp06 ~]# vgcreate datavg /dev/sdb
[root@hdp06 ~]# for id in catbs ustbs tmtbs;do lvcreate -n $id -L +512M datavg;done
[root@hdp06 ~]# lvcreate -n tbs01 -L +20G datavg
[root@hdp06 ~]# for id in stbs1 utbs1;do lvcreate -n $id -L +1G datavg;done
[root@hdp06 ~]# ll /dev/dm-{2..7}
brw-rw---- 1 root disk 249, 2 Jul 19 11:49 /dev/dm-2
brw-rw---- 1 root disk 249, 3 Jul 19 11:49 /dev/dm-3
brw-rw---- 1 root disk 249, 4 Jul 19 11:49 /dev/dm-4
brw-rw---- 1 root disk 249, 5 Jul 19 11:49 /dev/dm-5
brw-rw---- 1 root disk 249, 6 Jul 19 11:49 /dev/dm-6
brw-rw---- 1 root disk 249, 7 Jul 19 11:49 /dev/dm-7

二、獲取UUID

[root@hdp06 ~]# for i in {2..7};do udevadm info --query=all --name=/dev/dm-$i | grep -i DM_UUID;done
E: DM_UUID=LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YfWXcy2QJ0N17L2HuAsEzTlfWBTMyXMjX
E: DM_UUID=LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YIVnlrSdMdMe6MrdpzT1oWR4oGVYjLgTP
E: DM_UUID=LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YA6DF2S7gHxiWwonFFnGskv8oqn09ehuJ
E: DM_UUID=LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YX43yw6FLWfDYGKQ4iCMQYoj5CCaWsO0z
E: DM_UUID=LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YV5Ft9f0ld7QjxASNgvkHFqoSWfgJqvsT
E: DM_UUID=LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YJwktSMWrevmXvzi4DwzYvswwtOuu1U9o

對應的udev規則文件內容以下：

[root@hdp06 ~]# cat /etc/udev/rules.d/99-db2disk-owner.rules 
ACTION=="add|change", ENV{DM_UUID}=="LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YfWXcy2QJ0N17L2HuAsEzTlfWBTMyXMjX", NAME="catbs",  OWNER="abcinst", GROUP="db2iadm", MODE="0660"
ACTION=="add|change", ENV{DM_UUID}=="LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YIVnlrSdMdMe6MrdpzT1oWR4oGVYjLgTP", NAME="ustbs",  OWNER="abcinst", GROUP="db2iadm", MODE="0660"
ACTION=="add|change", ENV{DM_UUID}=="LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YA6DF2S7gHxiWwonFFnGskv8oqn09ehuJ", NAME="tmtbs", OWNER="abcinst", GROUP="db2iadm", MODE="0660"
ACTION=="add|change", ENV{DM_UUID}=="LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YX43yw6FLWfDYGKQ4iCMQYoj5CCaWsO0z", NAME="tbs01", OWNER="abcinst", GROUP="db2iadm", MODE="0660"
ACTION=="add|change", ENV{DM_UUID}=="LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YV5Ft9f0ld7QjxASNgvkHFqoSWfgJqvsT", NAME="stbs1", OWNER="abcinst", GROUP="db2iadm", MODE="0660"
ACTION=="add|change", ENV{DM_UUID}=="LVM-F5TLuj05MSbaG40MlW1YJnvwLdGrZd7YJwktSMWrevmXvzi4DwzYvswwtOuu1U9o", NAME="utbs1", OWNER="abcinst", GROUP="db2iadm", MODE="0660"

三、啓動UDEV

[root@hdp06 ~]# /usr/sbin/udevadm trigger
[root@hdp06 ~]# ll /dev/dm-{2..7}
brw-rw---- 1 abcinst db2iadm 249, 2 Jul 19 14:46 /dev/dm-2
brw-rw---- 1 abcinst db2iadm 249, 3 Jul 19 14:46 /dev/dm-3
brw-rw---- 1 abcinst db2iadm 249, 4 Jul 19 14:46 /dev/dm-4
brw-rw---- 1 abcinst db2iadm 249, 5 Jul 19 14:46 /dev/dm-5
brw-rw---- 1 abcinst db2iadm 249, 6 Jul 19 14:46 /dev/dm-6
brw-rw---- 1 abcinst db2iadm 249, 7 Jul 19 14:46 /dev/dm-7

或者使用下面的命令：

[root@hdp06 ~]# /sbin/udevadm control --reload-rules
[root@hdp06 ~]# /sbin/udevadm trigger --type=devices --action=change