In forthcoming chapters, you will be presented with a practical example of cluster installation and configuration. The three-node cluster used in the example will be running in a virtualized environment. All cluster node virtual machines run on a CentOS version 6 64-bit minimal installation. SELinux and IPTables are enabled and run on all cluster nodes. All the cluster nodes have the same resource specifications, as follows:
One CPU core
768 MB RAM
One 10 GB disk
One 1 GB disk
Two network adapters
The cluster node's fully qualified domain names are as follows:
node-1.geekpeek.net (short name: node-1)
node-2.geekpeek.net (short name: node-2)
node-3.geekpeek.net (short name: node-3)
Due to the limitations of my virtualized environment, the network IP addresses of both cluster node network interfaces are in the same network subnet: 192.168.88.0/24.
The assigned static cluster node IP addresses are as follows:
192.168.88.10, 192.168.88.11: node-1.geekpeek.net192.168.88.20, 192...