# open-iscsi is installed, and the iscsid daemon is running on all the nodes.
$ rpm -qa | grep -E "open-iscsi|nfs-client"
open-iscsi-2.1.9-3.7.x86_64
nfs-client-2.6.3-36.15.x86_64

$ sudo systemctl enable --now iscsid

$ sudo systemctl is-active iscsid

# the following pkg must be installed
$ sudo bash -c "for i in bash curl findmnt grep awk blkid lsblk; do command -v \${i}; done | wc -l"
7

# Check NFSv4.1 or NFSv4.2 support is enabled in kernel
$ cat /boot/config-`uname -r`| grep -E "CONFIG_NFS_V4_1|CONFIG_NFS_V4_2"
CONFIG_NFS_V4_1=y
CONFIG_NFS_V4_2=y
CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN="kernel.org"
# CONFIG_NFS_V4_1_MIGRATION is not set
# CONFIG_NFS_V4_2_READ_PLUS is not set
CONFIG_NFS_V4_2_SSC_HELPER=y

$ cat <<EOF | sudo tee -a /etc/modules-load.d/v2_data_engine_modules.conf
vfio_pci
uio_pci_generic
nvme-tcp
EOF

$ sudo reboot

$ sudo lsmod | grep -Ei "vfio_pci|uio_pci_generic|nvme_tcp"
nvme_tcp               61440  0
nvme_keyring           16384  1 nvme_tcp
nvme_fabrics           45056  1 nvme_tcp
nvme_core             233472  2 nvme_tcp,nvme_fabrics
uio_pci_generic        12288  0
vfio_pci               16384  0
vfio_pci_core          86016  1 vfio_pci
vfio                   61440  3 vfio_pci_core,vfio_iommu_type1,vfio_pci
irqbypass              12288  2 vfio_pci_core,kvm
uio                    32768  2 cnic,uio_pci_generic

$ sudo pvcreate pvcreate /dev/sdb

$ sudo vgcreate longhorn-vg /dev/sdb

$ sudo lvcreate -l 100%FREE -n longhorn-data longhorn-vg

$ sudo lvs
  LV            VG          Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  longhorn-data longhorn-vg -wi-a----- 32.00g
  
$ sudo mkdir -p /var/lib/longhorn

$ sudo mkfs.xfs /dev/longhorn-vg/longhorn-data

$ sudo vi /etc/fstab
/dev/longhorn-vg/longhorn-data /var/lib/longhorn xfs defaults 0 0

$ sudo mount -a