When deploying Kubernetes, one of the very common requirement is to have persistent storage. For stateful applications such as databases, persistent storage is a “Must Have” requirement. The solution is mounting the external volumes inside the containers. In public cloud deployments, Kubernetes has integrations with the cloud providers’ block-storage backends, allowing developers to create claims for volumes to use with their deployments. Kubernetes also works with the cloud provider to create a volume and mount it inside the developers’ pods. There are several options available in Kubernetes to replicate the same behavior on-premise. However, one of the simplest and easiest ways is to set up the NFS server in a Linux machine and provide the back-end storage to the NFS client provisioner within the Kubernetes cluster.

Note: This setup does not address full secure configuration and does not provide high availability for persistent volume. Therefore, it must not be adopted for a production environment.

In the tutorial below, I’ll explain how to set up an NFS client provisioner in the Red Hat OpenShift Container Platform by setting up the NFS server in Red Hat Enterprise Linux.

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