http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Global_File_System_2/index.html

yum groupinstall "Cluster Storage"
# egrep 'GFS2|DLM' /boot/config-2.6.32-*
/boot/config-2.6.32-131.2.1.el6.x86_64:CONFIG_GFS2_FS=m
/boot/config-2.6.32-131.2.1.el6.x86_64:CONFIG_GFS2_FS_LOCKING_DLM=y
/boot/config-2.6.32-131.2.1.el6.x86_64:CONFIG_DLM=m
/boot/config-2.6.32-131.2.1.el6.x86_64:CONFIG_DLM_DEBUG=y
/boot/config-2.6.32-71.el6.x86_64:CONFIG_GFS2_FS=m
/boot/config-2.6.32-71.el6.x86_64:CONFIG_GFS2_FS_LOCKING_DLM=y
/boot/config-2.6.32-71.el6.x86_64:CONFIG_DLM=m
/boot/config-2.6.32-71.el6.x86_64:CONFIG_DLM_DEBUG=y
		

pvcreate /dev/sdb3
vgcreate vg01 /dev/sdb3
lvcreate -L 500G -n lvol0 vg01
mkfs.gfs2 -p lock_dlm -t alpha:mydata1 -j 8 /dev/vg01/lvol0
		

# pvcreate /dev/sdb3
  Physical volume "/dev/sdb3" successfully created
# vgcreate vg01 /dev/sdb3
  Volume group "vg01" successfully created
# lvcreate -L 500G -n lvol0 vg01
  Logical volume "lvol0" created


# mkfs.gfs2 -p lock_dlm -t alpha:mydata1 -j 8 /dev/vg01/lvol0
This will destroy any data on /dev/vg01/lvol0.
It appears to contain: symbolic link to `../dm-6'

Are you sure you want to proceed? [y/n] y

Device:                    /dev/vg01/lvol0
Blocksize:                 4096
Device Size                500.00 GB (131072000 blocks)
Filesystem Size:           500.00 GB (131071998 blocks)
Journals:                  8
Resource Groups:           2000
Locking Protocol:          "lock_dlm"
Lock Table:                "alpha:mydata1"
UUID:                      4FC256A0-00BD-2087-15DF-8EA4366481AA
		

# mkdir /mnt/gfs2
# mount -t gfs2 -o noatime /dev/mapper/vg01-lvol0 /mnt/gfs2
gfs_controld join connect error: Connection refused
error mounting lockproto lock_dlm