Configuring the underlying storage infrastructure is usually a task for storage administrators. This requires a number of settings and design decisions so that you can achieve the expected level of durability, availability, and performance. This requires a significant knowledge of underlying resources, physical infrastructure, networking, and so on. Once the storage subsystem has been configured properly by storage administrators, OpenShift cluster administrators can leverage it to create PVs.
This book is about OpenShift administration, and thus the configuration of an underlying storage technology is out of its scope. However, we want to demonstrate how to perform the basic setup of storage infrastructure on Linux systems for NFS, GlusterFS, and iSCSI.