Longhorn supports iSCSI target frontend mode. The user can connect to it
through any iSCSI client, including open-iscsi, and virtual machine
hypervisor like KVM, as long as it’s in the same network with the Longhorn system.
The Longhorn CSI driver doesn’t support iSCSI mode.
To start volume with iSCSI target frontend mode, select iSCSI as the frontend
when creating the volume. After volume has been attached, the user will see
something like following in the endpoint field: