Find, format, and mount an AWS Ephemeral NVMe disk within ec2 in user data

mount_aws_nvme_ephemeral.sh

#!/usr/bin/env bash


###
## This mounts a (single) ephemral NVMe drive in an EC2 server.
## It's meant to be run once, within user-data
## For EBS drives (non-ephemeral storage), see: https://gist.github.com/jalaziz/c22c8464cb602bc2b8d0a339b013a9c4
#


# Install the "nvme" command
# See: https://github.com/linux-nvme/nvme-cli
sudo apt-get install -y nvme-cli


# Create a mount point (directory)
sudo mkdir -p /some/mount


# Find ephemeral storage (assumes a single ephemeral disk)
# and format it (assumes this is run on first-boot in user-data, so the disk is not formatted)
EPHEMERAL_DISK=$(sudo nvme list | grep 'Amazon EC2 NVMe Instance Storage' | awk '{ print $1 }')
sudo mkfs.ext4 $EPHEMERAL_DISK
sudo mount -t ext4 $EPHEMERAL_DISK /some/mount


### For some crazy reason, add ephemeral disk mount to /etc/fstab
## even tho you lose data in stop/starts of ec2 (I believe you keep the data via regular reboots?)
#
# Find the mounted drive UUID so we can mount by UUID
EPHEMERAL_UUID=$(sudo blkid -s UUID -o value $EPHEMERAL_DISK)
echo "UUID=$EPHEMERAL_UUID /opt/nomad ext4 defaults 0 0" | sudo tee -a /etc/fstab

Thanks for sharing!