四：在共享存储上划分LVM,在一个节点上操作即可
[root@dg51 ~]# fdisk -l /dev/sda (在开始之前，需要将分区改为8e)
Disk /dev/sda: 10.7 GB, 10737418240 bytes
64 heads, 32 sectors/track, 10240 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 10240 10485744 8e Linux LVM
[root@dg51 ~]# pvcreate /dev/sda1
Physical volume "/dev/sda1" successfully created
[root@dg51 ~]# vgcreate dg_gfs /dev/sda1
Clustered volume group "dg_gfs" successfully created
[root@dg51 ~]# vgdisplay dg_gfs
--- Volume group ---
VG Name dg_gfs
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
Clustered yes
Shared no
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 10.00 GB
PE Size 4.00 MB
Total PE 2559
Alloc PE / Size 0 / 0
Free PE / Size 2559 / 10.00 GB
VG UUID hMivT2-FIuF-QX2N-EXU9-CaZF-wR5a-8QS7t4
[root@dg51 ~]# lvcreate -n gfs1 -l 2559 dg_gfs
Logical volume "gfs1" created
如果出现下面的错误，在两个节点上重启下clvmd进程即可
[root@dg51 ~]# lvcreate -n gfs1 -l 2559 dg_gfs
Error locking on node dg52.yang.com: Volume group for uuid not found:
hMivT2FIuFQX2NEXU9CaZFwR5a8QS7t4Ft4RMjI9V6a3jUudYQe0i1IygtIlaHxc
Aborting. Failed to activate new LV to wipe the start of it.
[root@dg51 ~]# service clvmd restart
Deactivating VG dg_gfs: 0 logical volume(s) in volume group "dg_gfs" now active [ OK ]
Stopping clvm: [ OK ]
Starting clvmd: [ OK ]
Activating VGs: 0 logical volume(s) in volume group "dg_gfs" now active
[root@dg51 ~]# service clvmd status
clvmd (pid 5494) is running...
active volumes: gfs1 [ OK ]
[root@dg51 ~]# lvscan
ACTIVE '/dev/dg_gfs/gfs1' [10.00 GB] inherit
[root@dg52 ~]# lvscan
ACTIVE '/dev/dg_gfs/gfs1' [10.00 GB] inherit
