Longhorn is a popular choice for providing vendor-agnositic, replicated block storage in Kubernetes clusters. Longhorn provides a fault-tolerant alternative to the storage-options available in e.g. AWS and GKE. Longhorn is Open Source and provides a nice UI.
We have written a simple guide to getting Longhorn up and running in a Stabile Kubernetes cluster. The guide should only take a few minutes to complete, so try it out!