This blog post has been updated with additional details and was originally published on 03-14-2022.

Adding storage to an OpenShift cluster can greatly increase the types of workloads you can run, including workloads such as OpenShift Virtualization, or databases such as MongoDB and PostgreSQL. Persistent volumes can be supplied in many different ways within OpenShift including using LocalVolumes, or OpenShift Data Foundation, or provided by an underlying Cloud Provider such as the vSphere provider. Storage providers for external storage arrays such as Pure CSI Driver, Dell, Infinidat CSI Driver and Synology CSI Driver also exist. While I do not have the a Pure Storage Array or an Infinibox in my home lab, I do have a Synology array, that supports iSCSI and this will be the focus of the blog. The Synology CSI driver supports the creation of ReadWriteOnce (RWO) persistent file volumes along with ReadWriteMany (RWX) persistent block volumes as well as the creation of snapshots on both these volume types.