How to make block device NVMe assigned names persistent?

Environment

• Red Hat Enterprise Linux 7, 8, 9 and 10
• NVMe storage (Non-Volatile Memory express)

Issue

• How to write udev rule to create persistent name of NVMe devices?
• udev rule for NVMe devices

Resolution

• Get the ID_SERIAL_SHORT of nvme device.

    $ udevadm info --query=all --path=/block/nvme1n1 | grep ID_SERIAL_SHORT
       E: ID_SERIAL_SHORT=S4FVBS0M4652
  

• Create udev rule file in directory /etc/udev/rules.d/ and may give some illustrative name like 99-nvmepersistent.rules

• Add the below entry in rule file.

    KERNEL=="nvme*[0-9]n*[0-9]", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", ENV{ID_SERIAL_SHORT}=="S4FVBS0M4652", SYMLINK+="NAME1"
  

• Reload and trigger udev rules using below commands.

    $ /sbin/udevadm control --reload-rules
    $ /sbin/udevadm trigger --type=devices --action=change
  

• Because of the udev rule, a symlink named "NAME1" linking to the nvme device will be created. Even if the name of the nvme device changes, the symlink links to the same nvme device persistently.

    $ ls -l /dev/NAME1 
    $ lrwxrwxrwx. 1 root root 7 Feb 16 09:57 /dev/NAME1 -> nvme1n1
  

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