I'm hoping to use Amazon Elastic Compute Cloud (EC2) for an upcoming project that involves multi-hosting a bunch of Drupal websites. I like the "pay for what you use" model, and the ability to ramp up capacity within minutes instead of weeks. Integrating one of Drupal's provisioning solutions with Amazon's "Datacentre On-Demand" is my ultimate goal.

But first, EC2 has a few limitations which makes multi-site hosting a little more challenging:

We're going to remove /mnt and use the "disk" to create LVM filesystems for our data. This will let us take snapshots, allowing for much quicker backups.

This script is a slightly modified version of Paul Moen's from http://blog.dbadojo.com/2007/11/making-logical-volumes-on-ec2.html.

Paste the script below into a file:

#!/bin/sh
# Name: make_mnt_LV.sh
# Script to make EC2 /mnt into a LVM volume

modprobe dm-snapshot

umount /mnt
pvcreate /dev/sda2
vgcreate vg /dev/sda2
lvcreate -L30720M -n myvmdisk1 vg
mkfs -t ext3 /dev/vg/myvmdisk1
mkdir -p /data/mysql_master