In this chapter, you learned how to configure persistence for the services deployed in OpenShift.
This chapter started with theoretical knowledge, giving you more details on volumes and their different types. Later, you learned a particularly useful type of the volume the PersistentVolumeClaim. You also learned why it is necessary, how it is related to the PersistentVolume, and how to use it.
Finally, we extended your catalogService so that it uses the postgresql database as the storage.