红帽全球峰会10.3. Configuring an NVMe/RDMA host
You can configure a Non-volatile Memory Express™ (NVMe™) over RDMA (NVMe™/RDMA) host by using the NVMe management command-line interface (nvme-cli) tool. For more information, see the nvme(1) man page on your system.
Procedure
Install the
nvme-clitool:# dnf install nvme-cliLoad the
nvme-rdmamodule if it is not loaded:# modprobe nvme-rdmaDiscover available subsystems on the NVMe controller:
# nvme discover -t rdma -a 172.31.0.202 -s 4420 Discovery Log Number of Records 2, Generation counter 2 =====Discovery Log Entry 0====== trtype: rdma adrfam: ipv4 subtype: current discovery subsystem treq: not specified, sq flow control disable supported portid: 2 trsvcid: 4420 subnqn: nqn.2014-08.org.nvmexpress.discovery traddr: 172.31.0.202 eflags: none rdma_prtype: not specified rdma_qptype: connected rdma_cms: rdma-cm rdma_pkey: 0000 =====Discovery Log Entry 1====== trtype: rdma adrfam: ipv4 subtype: nvme subsystem treq: not specified, sq flow control disable supported portid: 2 trsvcid: 4420 subnqn: testnqn traddr: 172.31.0.202 eflags: none rdma_prtype: not specified rdma_qptype: connected rdma_cms: rdma-cm rdma_pkey: 0000Connect to the discovered subsystems:
# nvme connect -t rdma -a 172.31.0.202 -s 4420 -n testnqn connecting to device: nvme0 # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 464.8G 0 part ├─rhel_rdma--virt--03-root 253:0 0 50G 0 lvm / ├─rhel_rdma--virt--03-swap 253:1 0 4G 0 lvm [SWAP] └─rhel_rdma--virt--03-home 253:2 0 410.8G 0 lvm /home nvme0n1 # cat /sys/class/nvme/nvme0/transport rdmaReplace testnqn with the NVMe subsystem name.
Replace 172.31.0.202 with the controller IP address.
Replace 4420 with the port number.
Verification
List the NVMe devices that are currently connected:
# nvme listOptional: Disconnect from the controller:
# nvme disconnect -n testnqn NQN:testnqn disconnected 1 controller(s) # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 464.8G 0 part ├─rhel_rdma--virt--03-root 253:0 0 50G 0 lvm / ├─rhel_rdma--virt--03-swap 253:1 0 4G 0 lvm [SWAP] └─rhel_rdma--virt--03-home 253:2 0 410.8G 0 lvm /home
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