Red Hat Summit12.2. Connecting the NVMe/TCP host to the NVMe/TCP controller
Connect the NVMe™ over TCP (NVMe/TCP) host to the NVMe/TCP controller system to verify that the NVMe/TCP host can now access the namespace. For more information, see nvme(1) man page on your system.
The NVMe/TCP controller (nvmet-tcp) module is not supported.
Prerequisites
- You have configured an NVMe/TCP host. For more information, see Configuring an NVMe/TCP host.
- You have configured an NVMe/TCP controller by using external storage software and the network is configured on the controller. In this procedure, 192.168.101.55 is the IP address of the NVMe/TCP controller.
Procedure
Load the
nvme-tcpmodule if not already:# modprobe nvme-tcpDiscover the available subsystems on the NVMe controller:
# nvme discover --transport=tcp --traddr=192.168.101.55 --trsvcid=8009 Discovery Log Number of Records 2, Generation counter 7 =====Discovery Log Entry 0====== trtype: tcp adrfam: ipv4 subtype: current discovery subsystem treq: not specified, sq flow control disable supported portid: 2 trsvcid: 8009 subnqn: nqn.2014-08.org.nvmexpress.discovery traddr: 192.168.101.55 eflags: not specified sectype: none =====Discovery Log Entry 1====== trtype: tcp adrfam: ipv4 subtype: nvme subsystem treq: not specified, sq flow control disable supported portid: 2 trsvcid: 8009 subnqn: nqn.2014-08.org.nvmexpress:uuid:0c468c4d-a385-47e0-8299-6e95051277db traddr: 192.168.101.55 eflags: not specified sectype: noneHere, 192.168.101.55 is the NVMe/TCP controller IP address.
Configure the
/etc/nvme/discovery.conffile to add the parameters used in thenvme discovercommand:# echo "--transport=tcp --traddr=192.168.101.55 --trsvcid=8009" >> /etc/nvme/discovery.confConnect the NVMe/TCP host to the controller system:
# nvme connect-allMake the NVMe/TCP connection persistent:
# systemctl enable nvmf-autoconnect.service
Verification
Verify that the NVMe/TCP host can access the namespace:
# nvme list-subsys nvme-subsys3 - NQN=nqn.2014-08.org.nvmexpress:uuid:0c468c4d-a385-47e0-8299-6e95051277db \ +- nvme3 tcp traddr=192.168.101.55,trsvcid=8009,host_traddr=192.168.101.154 live optimized # nvme list Node Generic SN Model Namespace Usage Format FW Rev --------------------- --------------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- -------- /dev/nvme3n1 /dev/ng3n1 d93a63d394d043ab4b74 Linux 1 21.47 GB / 21.47 GB 512 B + 0 B 5.18.5-2
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