第10章 Configuring NVMe over fabrics using NVMe/RDMA

Procedure

1. Create the nvmet-rdma subsystem:

   # modprobe nvmet-rdma
   
   # mkdir /sys/kernel/config/nvmet/subsystems/testnqn
   
   # cd /sys/kernel/config/nvmet/subsystems/testnqn

   Replace testnqn with the subsystem name.

2. Allow any host to connect to this controller:

   # echo 1 > attr_allow_any_host

3. Configure a namespace:

   # mkdir namespaces/10
   
   # cd namespaces/10

   Replace 10 with the namespace number

4. Set a path to the NVMe device:

   # echo -n /dev/nvme0n1 > device_path

5. Enable the namespace:

   # echo 1 > enable

6. Create a directory with an NVMe port:

   # mkdir /sys/kernel/config/nvmet/ports/1
   
   # cd /sys/kernel/config/nvmet/ports/1

7. Display the IP address of mlx5_ib0:

   # ip addr show mlx5_ib0
   
   8: mlx5_ib0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 4092 qdisc mq state UP group default qlen 256
       link/infiniband 00:00:06:2f:fe:80:00:00:00:00:00:00:e4:1d:2d:03:00:e7:0f:f6 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
       inet 172.31.0.202/24 brd 172.31.0.255 scope global noprefixroute mlx5_ib0
          valid_lft forever preferred_lft forever
       inet6 fe80::e61d:2d03:e7:ff6/64 scope link noprefixroute
          valid_lft forever preferred_lft forever

8. Set the transport address for the controller:

   # echo -n 172.31.0.202 > addr_traddr

9. Set RDMA as the transport type:

   # echo rdma > addr_trtype
   
   # echo 4420 > addr_trsvcid

10. Set the address family for the port:

    # echo ipv4 > addr_adrfam

11. Create a soft link:

    # ln -s /sys/kernel/config/nvmet/subsystems/testnqn /sys/kernel/config/nvmet/ports/1/subsystems/testnqn