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tar -zvxf MLNX_OFED_LINUX-4.9-4.1.7.0-ubuntu20.04-x86_64.tgz
cd MLNX_OFED_LINUX-4.9-4.1.7.0-ubuntu20.04-x86_64/
sudo ./mlnxofedinstall --with-nvmf 
sudo update-initramfs -u
sudo apt install nvme-cli
reboot

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knightli@epyc:~$ sudo lshw -c network
  *-network:0               
       description: Ethernet interface
       product: I350 Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: eno1
       version: 01
       serial: ac:1f:6b:e7:e7:b4
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.6.0-k firmware=1.69, 0x80000df4 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:84 memory:eff20000-eff3ffff ioport:1020(size=32) memory:eff44000-eff47fff memory:1c904000000-1c90401ffff memory:1c904020000-1c90403ffff
  *-network:1
       description: Ethernet interface
       product: I350 Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 0.1
       bus info: pci@0000:01:00.1
       logical name: eno2
       version: 01
       serial: ac:1f:6b:e7:e7:b5
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igb driverversion=5.6.0-k duplex=full firmware=1.69, 0x80000df4 ip=192.168.8.161 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:98 memory:eff00000-eff1ffff ioport:1000(size=32) memory:eff40000-eff43fff memory:1c904040000-1c90405ffff memory:1c904060000-1c90407ffff
  *-network
       description: interface
       product: MT27520 Family [ConnectX-3 Pro]
       vendor: Mellanox Technologies
       physical id: 0
       bus info: pci@0000:61:00.0
       logical name: ibp97s0
       logical name: /dev/fb0
       version: 00
       serial: a0:00:02:20:fe:80:00:00:00:00:00:00:9c:dc:00:00:00:00:00:00
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msix pciexpress bus_master cap_list rom physical fb
       configuration: autonegotiation=on broadcast=yes depth=32 driver=ib_ipoib driverversion=4.9-4.1.7 duplex=full firmware=2.42.5700 ip=172.18.8.2 latency=0 link=yes mode=1024x768 multicast=yes visual=truecolor xres=1024 yres=768
       resources: iomemory:8f0-8ef irq:94 memory:ea500000-ea5fffff memory:8f06000000-8f07ffffff memory:ea400000-ea4fffff
  *-network DISABLED
       description: interface
       physical id: 4
       bus info: pci@0000:61:00.0
       logical name: ibp97s0d1
       serial: a0:00:03:00:fe:80:00:00:00:00:00:00:9c:dc:00:00:00:00:00:00
       size: 10Gbit/s
       capabilities: physical
       configuration: autonegotiation=on broadcast=yes driver=ib_ipoib driverversion=4.9-4.1.7 duplex=full firmware=2.42.5700 link=no multicast=yes speed=10Gbit/s

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# This is the network config written by 'subiquity'
network:
  ethernets:
    eno1:
      optional: true
      dhcp4: true
    eno2:
      optional: true
      dhcp4: true
    ibp97s0:
      addresses: [172.18.8.2/24]
  version: 2

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#!/bin/bash
expdev(){
    echo "exp nvme dev [subsystem] = $1 [nvme dev] = $2 [namespace number]=$3 [ip]=$4 [port]=$5"
    mkdir /sys/kernel/config/nvmet/subsystems/$1/namespaces/$3
    echo -n $2 > /sys/kernel/config/nvmet/subsystems/$1/namespaces/$3/device_path
    echo 1 > /sys/kernel/config/nvmet/subsystems/$1/namespaces/$3/enable
    mkdir /sys/kernel/config/nvmet/ports/$3
    echo $4 > /sys/kernel/config/nvmet/ports/$3/addr_traddr
    echo rdma > /sys/kernel/config/nvmet/ports/$3/addr_trtype
    echo $5 > /sys/kernel/config/nvmet/ports/$3/addr_trsvcid
    echo ipv4 > /sys/kernel/config/nvmet/ports/$3/addr_adrfam
    ln -s /sys/kernel/config/nvmet/subsystems/$1 /sys/kernel/config/nvmet/ports/$3/subsystems/$1
}

modprobe mlx5_core
modprobe nvmet
modprobe nvmet-rdma
modprobe nvme-rdma

mkdir /sys/kernel/config/nvmet/subsystems/data_8
echo 1 > /sys/kernel/config/nvmet/subsystems/data_8/attr_allow_any_host
expdev data_8 /dev/nvme0n1 800 172.18.8.1 6600
expdev data_8 /dev/nvme1n1 801 172.18.8.1 6601
expdev data_8 /dev/nvme2n1 802 172.18.8.1 6602
expdev data_8 /dev/nvme3n1 803 172.18.8.1 6603
expdev data_8 /dev/nvme4n1 804 172.18.8.1 6604

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sudo apt install nvme-cli

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modprobe mlx5_core
modprobe nvme-rdma
sudo nvme connect -t rdma -n data_8 -a 172.18.8.1 -s 6601