Setup & merge all ephemeral drives on an EC2 instance

ec2-ephemeral-setup.sh

#!/usr/bin/env bash
set -eux

DEVICES=$(ls /dev | egrep -o nvme.n1 | sort -u | grep -v $(df -h | egrep -o nvme.n1) | sed 's_\<_/dev/_g')

echo "Setting up the following devices:"
echo ${DEVICES}

read -p "Are you sure? " -n 1 -r
echo
if [[ "${REPLY}" =~ ^[Yy]$ ]]
then
    pvcreate ${DEVICES}
    vgcreate vg-ephemeral ${DEVICES}
    lvcreate -n swap -L 128G vg-ephemeral
    lvcreate -n temp -L 512G vg-ephemeral
    lvcreate -n data -l 100%FREE vg-ephemeral

    mkswap /dev/vg-ephemeral/swap
    swapon /dev/vg-ephemeral/swap

    mkfs.ext4 -E nodiscard /dev/vg-ephemeral/temp
    mount /dev/vg-ephemeral/temp /tmp
    chmod 777 /tmp

    mkfs.xfs -K /dev/vg-ephemeral/data
    mkdir -p /data
    mount /dev/vg-ephemeral/data /data
    chown -R ec2-user:ec2-user /data
fi