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Some other additional information can be found in the documentation of the Thomas-Krenn.AG cluster (The author of this howto is working in the cluster development there, that is the reason why he was able to write this howto :-). The full documentation with interesting illustrations is currently only [http://www.thomas-krenn.com/en/service-support/knowledge-center/cluster/documentation.html available in German]:
An excellent presentation and overview by Werner Fischer, Thomas-Krenn.AG is available here http://www.profoss.eu/index.php/main/content/download/355/3864/file/werner-fischer.pdf.
== Prerequisites ==
! other install options
| no firewall, no SELinux
| no firewall, no SELinux|-! package groups| deactivated everything, only kept vim-enhanced| deactivated everything, only kept SELinuxt vim-enhanced
|}
== Setting up DRBD ==
'''On each of the two nodes create a partition that acts as underlying DRBD device. ''' The partitions should have exactly the same size (I created a 10 GB partition hda3 using fdisk on each node for this example). Note that it might be necessary to reboot the machines to re-read the partition table.
Install the rpm of the DRBD userspace tools on both nodes:
[root@ovz-node1 ~]# mkdir -p /vz/cluster/etc/sysconfig
[root@ovz-node1 ~]# mkdir -p /vz/cluster/var
[root@ovz-node1 ~]# cp -a /etc/vz .orig /vz/cluster/etc/vz/[root@ovz-node1 ~]# cp -a /etc/sysconfig/vz-scripts .orig /vz/cluster/etc/sysconfig/vz-scripts[root@ovz-node1 ~]# cp -a /var/vzquota .orig /vz/cluster/var/vzquota
[root@ovz-node1 ~]# umount /dev/drbd0
[root@ovz-node1 ~]#
