I reckon theres little sense in running 2 or more Percona XtraDB Cluster (PXC) nodes in a single physical server other than for educational and testing purposes  but doing so is still useful in those cases. The most popular way of achieving this seems to be with server virtualization, such as making use of Vagrant boxes. [&]

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http://www.percona.com/blog/2014/10/21/percona-xtradb-cluster-how-to-run-a-2-node-cluster-on-a-single-server/