snap-backup

#!/bin/bash
#
# Backup this hosts MySQL databases using LVM snapshots.
# 
if [ ! $1 ]; then
  echo "snap-backup <snapshot size in GB>"
  vgdisplay `hostname` | grep Free
  exit 1
fi

size=$1

date > /thevoid/mysql/snapshot_date
hostname >> /thevoid/mysql/snapshot_date

mkdir -p /snapbackup
echo "Taking snapshot"
sudo lvcreate -L${size}G -s -n backups /dev/`hostname`/thevoid
sudo mount /dev/`hostname`/backups /snapbackup
echo "Your snapshot is now mounted at /snapbackup"
rm /thevoid/mysql/snapshot_date