EC2 Snapshot Management

#Backup all instances
for region in $(ec2-describe-regions |grep -Ev "ATTACHMENT" |cut -f2);do
  for volid in $(ec2-describe-volumes --region $region |grep -Ev "ATTACHMENT" |cut -f2);do
    echo "Creating snapshot from $volid in $region";
    ec2-create-snapshot --region $region $volid
  done;
done;

is_older()
{
  DATE=$(date -d "$1" +%Y-%m-%d)
  TODAY=$(date -d "$(date +%Y-%m-%d) $2 $3 $4 $5" +%s)
  COMPARE=$(date -d "$DATE" +%s)
  test $(($TODAY - $COMPARE)) -le 0 && return 1 || return 0
}

#Purge old records
for region in $(ec2-describe-regions |grep -Ev "ATTACHMENT" |cut -f2);do
  for snapid in $(ec2-describe-snapshots --region $region |grep -Ev "ATTACHMENT"| cut -f2 );do
    snapdate=$(ec2-describe-snapshots --region $region $snapid | cut -f5 | cut -d "T" -f1)
    if is_older $snapdate -7 days ;then
      echo "Purging snapshot $snapid in $region";
      ec2-delete-snapshot --region $region $snapid
    fi
  done;
done;