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CentOS 5上部署udev
首先来简要的介绍下什么是udev,udev是Linux kernel 2.6系列的通用内核设备管理器,以守护进程的方式运行于Linux系统,并监听在新设备初始化或设备从系统中移除时,内核(通过netlink socket)所发出的uevent;简单点讲就是当有多块磁盘的时候,可以用udev来固定磁盘对应的设备名;之前在部署11g rac的时候都偏好使用asmlib,在最近一次的部署中asmlib出现了问题,而又没有时间去排错,因而采用udev部署,故而简单记录下udev的配置过程!一:模拟共享盘阵,这里采用先划分lvm,再通过iscsi共享的方式来模拟
[root@db1 ~]# pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created
[root@db1 ~]# vgcreate data /dev/sdb
/dev/hdc: open failed: Read-only file system
/dev/cdrom: open failed: Read-only file system
Attempt to close device "/dev/cdrom" which is not open.
Volume group "data" successfully created
[root@db1 ~]# lvcreate -n crs1 -L 2G data
Logical volume "crs1" created
[root@db1 ~]# lvcreate -n crs2 -L 2G data
Logical volume "crs2" created
[root@db1 ~]# lvcreate -n crs3 -L 2G data
Logical volume "crs3" created
[root@db1 ~]# lvcreate -n data -L 10G data
Logical volume "data" created
[root@db1 ~]# lvcreate -n fra -L 10G data
Logical volume "fra" created
[root@db1 ~]# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
crs1 data -wi-a- 2.00G
crs2 data -wi-a- 2.00G
crs3 data -wi-a- 2.00G
data data -wi-a- 10.00G
fra data -wi-a- 10.00G
[root@db1 ~]# service tgtd start
Starting SCSI target daemon: [ OK ]
[root@db1 ~]# cat iscsi.sh
tgtadm --lld iscsi --op new --mode target --tid 1 -T iqn.2012-07-04.com.yang.rac:crs1
tgtadm --lld iscsi --op new --mode target --tid 2 -T iqn.2012-07-04.com.yang.rac:crs2
tgtadm --lld iscsi --op new --mode target --tid 3 -T iqn.2012-07-04.com.yang.rac:crs3
tgtadm --lld iscsi --op new --mode target --tid 4 -T iqn.2012-07-04.com.yang.rac:data
tgtadm --lld iscsi --op new --mode target --tid 5 -T iqn.2012-07-04.com.yang.rac:fra
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b /dev/data/crs1
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 2 -b /dev/data/crs2
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 3 -b /dev/data/crs3
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 4 -b /dev/data/data
tgtadm --lld iscsi --op new --mode logicalunit --tid 1 --lun 5 -b /dev/data/fra
tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
tgtadm --lld iscsi --op bind --mode target --tid 2 -I ALL
tgtadm --lld iscsi --op bind --mode target --tid 3 -I ALL
tgtadm --lld iscsi --op bind --mode target --tid 4 -I ALL
tgtadm --lld iscsi --op bind --mode target --tid 5 -I ALL
[root@db1 ~]# tgtadm --lld iscsi -o show -m target
[root@db1 ~]# sh iscsi.sh
[root@db1 ~]# tgtadm --lld iscsi -o show -m target
Target 1: iqn.2012-07-04.com.yang.rac:crs1
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: deadbeaf1:0
SCSI SN: beaf10
Size: 0 MB
Online: Yes
Removable media: No
Backing store: No backing store
LUN: 1
Type: disk
SCSI ID: deadbeaf1:1
SCSI SN: beaf11
Size: 2147 MB
Online: Yes
Removable media: No
Backing store: /dev/data/crs1
LUN: 2
Type: disk
SCSI ID: deadbeaf1:2
SCSI SN: beaf12
Size: 2147 MB
Online: Yes
Removable media: No
Backing store: /dev/data/crs2
LUN: 3
Type: disk
SCSI ID: deadbeaf1:3
SCSI SN: beaf13
Size: 2147 MB
Online: Yes
Removable media: No
Backing store: /dev/data/crs3
LUN: 4
Type: disk
SCSI ID: deadbeaf1:4
SCSI SN: beaf14
Size: 10737 MB
Online: Yes
Removable media: No
Backing store: /dev/data/data
LUN: 5
Type: disk
SCSI ID: deadbeaf1:5
SCSI SN: beaf15
Size: 10737 MB
Online: Yes
Removable media: No
Backing store: /dev/data/fra
Account information:
ACL information:
ALL
Target 2: iqn.2012-07-04.com.yang.rac:crs2
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: deadbeaf2:0
SCSI SN: beaf20
Size: 0 MB
Online: Yes
Removable media: No
Backing store: No backing store
Account information:
ACL information:
Target 3: iqn.2012-07-04.com.yang.rac:crs3
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: deadbeaf3:0
SCSI SN: beaf30
Size: 0 MB
Online: Yes
Removable media: No
Backing store: No backing store
Account information:
ACL information:
Target 4: iqn.2012-07-04.com.yang.rac:data
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: deadbeaf4:0
SCSI SN: beaf40
Size: 0 MB
Online: Yes
Removable media: No
Backing store: No backing store
Account information:
ACL information:
Target 5: iqn.2012-07-04.com.yang.rac:fra
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: deadbeaf5:0
SCSI SN: beaf50
Size: 0 MB
Online: Yes
Removable media: No
Backing store: No backing store
Account information:
ACL information:
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