Once the software is physically installed on the server and configured to launch with PostgreSQL, we must start building our cluster. Despite how strange it might seem to have a cluster of only a single node, that's exactly how every BDR cluster begins.
We can think of our first BDR node as a seed from which the remainder of the cluster will grow. This node is very likely the current writable node used by our application stack. Thus, this recipe is a sort of conversion procedure, where we will explain how to transform a standard PostgreSQL database into the first node of a BDR cluster.
Let's begin!
