Installing the packages required for clustering
Once we have finished installing the operating system and configuring the basic network infrastructure, we are ready to install the packages that will provide the clustering functionality to each node. Let's emphasize here that without these core components, our two nodes would become simple standalone servers that would not be able to support each other in the event of a system crash or another major issue in one of them.
Key software components
Each node will need the following software components in order to work as a member of the cluster. These packages are fully supported in CentOS 7 as part of a cluster setup, as opposed to other alternatives that have been deprecated:
- Pacemaker: This is a cluster ...