Shell script to list all NVMe Instance Storage Devices on an EC2 instance

list-ec2-nvme-instance-storage-devices.sh

#!/bin/bash -e
for nvme_device_name in `lsblk | cut --delimiter=" " --fields=1 | grep ^nvme | sort -n`; do
    nvme_device="/dev/${nvme_device_name}"
    if ( nvme id-ctrl "${nvme_device}" | grep --quiet "^mn\\s*:\\s*Amazon EC2 NVMe Instance Storage\\s*$" ); then
        echo "${nvme_device}"
    fi
done

This might come in handy if you want to inspect your instance's NVMe Instance Storage configuration at runtime so that you can make a generic instance that can work across different instance types without having to configure the launch parameters specially for that instance type's storage.

It's necessary because the NVMe devices that are available can be EBS volumes or Instance Storage volumes and the numbering isn't reliable so you have to query to see which ones are which.

I don't think the device manufacturer string that this script is looking for is officially documented so caveat emptor.