GFS - Global File System from Redhat + Iscsi drive sharing.

# install packages

yum groupinstall -y "High Availability"
yum install -y cman gfs2-utils modcluster ricci luci cluster-snmp iscsi-initiator-utils openais oddjob rgmanager

On each node create a cluster config file

# /etc/cluster/cluster.conf
<?xml version="1.0"?>
<cluster config_version="3" name="cluster1">
<clusternodes>
<clusternode name="node1" nodeid="1"/>
<clusternode name="node2" nodeid="2"/>
</clusternodes>
</cluster>

passwd ricci
chkconfig iptables off
#or configure the Ports to be opened.
chkconfig ip6tables off
chkconfig ricci on
chkconfig cman on
chkconfig rgmanager on
chkconfig modclusterd on
service iptables stop
service ip6tables stop
service ricci start
service cman start
service rgmanager start
service modclusterd start

service ricci restart
service cman restart
service rgmanager restart
service modclusterd restart
# for node1 only
chkconfig luci on
service luci start

[root@controller1 ~]# chkconfig luci on
vice luci start[root@controller1 ~]# service luci start
Adding following auto-detected host IDs (IP addresses/domain names), corresponding to `controller1' address, to the configuration of self-managed certificate `/var/lib/luci/etc/cacert.config' (you can change them by editing `/var/lib/luci/etc/cacert.config', removing the generated certificate `/var/lib/luci/certs/host.pem' and restarting luci):
(none suitable found, you can still do it manually as mentioned above)

Generating a 2048 bit RSA private key
writing new private key to '/var/lib/luci/certs/host.pem'
Start luci... [ OK ]
Point your web browser to https://controller1:8084 (or equivalent) to access luci
[root@controller1 ~]#

Making GFS file system
/sbin/mkfs.gfs2 -j 10 -p lock_dlm -t cluster1:GFS /dev/sdb

Mounting the partion
# edit /etc/fstab and append the following.
/dev/sdb /path_to_mount gfs2 defaults,noatime,nodiratime 0 0