Storage provisioned by MetalK8s is currently backed by LVM Logical
Volumes<LVM LV>. A default setup will provision volumes tailored to the needs of various services deployed with MetalK8s, but this list can be extended to provide volumes which fulfil the needs of your application workloads.
While we're improving the documentation of this feature, see upgrade_from_MetalK8s_before_0.2.0 for some pointers.