Setting up CentOS 7 nodes

If you do not have dedicated hardware that you can use to set up the nodes of your cluster, you can still create them using virtual machines over some virtualization software, such as Oracle Virtualbox © or VMware ©, for example. Using virtualization will allow us to easily set up the second node after setting up the first by cloning it. The only limitation in this case is that we will not have a STONITH device available. Shoot The Other Node In The Head (STONITH) is a mechanism that aims to prevent two nodes from acting as the primary node in an HA cluster, thus avoiding the possibility of data corruption.

The following setup is going to be performed on a Virtualbox VM with 1 GB of RAM and 30 GB of disk space plus two ...

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