Adding a new cluster node
Adding a new cluster node to the existing cluster configuration does not require any cluster service downtime. You should be familiar with the process of installing and configuring cluster stack software on a CentOS 7 cluster node from Chapter 9, Cluster Stack Software on CentOS 7. Therefore, the steps for adding a new cluster node are not covered in detail.
Follow these steps to add a new cluster node to the running cluster configuration:
Operating system preparation:
Configure the network interfaces and networking
Configure the NTP time synchronization
Configure the DNS resolving
Check network connectivity between the cluster nodes
Note
For a details on how to prepare the operating system for CentOS 7, refer to Chapter 9, Cluster Stack Software on CentOS 7.
Install and configure Corosync:
Install Corosync on the new cluster node and configure the firewall to allow Corosync cluster communication.
Transfer the
corosync.conf
configuration file and theauthkey
authentication...