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.

Introduction OpenShift Container Platform and OpenShift Data Foundations can supply all your data storage needs, however sometimes you want to leverage an external storage array directly using storage protocols such as NFS or iSCSI. In many cases these storage networks will be served from dedicated network segments or VLANs and use dedicated network ports or network cards to handle the traffic. On traditional Operating Systems like RHEL, you would use tools such as nmcli and network-manager to configure settings such as MTU and or create bonded connections, but in Red Hat Core OS, these tools are not directly available to you.