Adding a new cluster node

Adding a new cluster node to an existing cluster configuration does not require any cluster service downtime. By this point, you should be familiar with the process of installing and configuring cluster stack software on a new CentOS 6 cluster node, so the steps for adding a new cluster node are not covered in detail.

To add a new cluster node to the existing cluster configuration, follow these steps:

1. Operating system preparation:

   • Configure network interfaces and networking

   • Configure NTP time synchronization

   • Configure DNS resolving

   • Check the network connectivity between the cluster nodes

   Note

   For a detailed procedure on operating system preparation on CentOS 6, refer to Chapter 3, Cluster Stack Software on CentOS 6.

2. Install and configure Corosync:

   • Install Corosync on the new cluster node and configure iptables rules to allow Corosync cluster communication.

   • Transfer the corosync.conf configuration file and the authkey authentication key from one of the preexisting cluster nodes...