(/usr/sbin/blkid -t TYPE=ext4 | grep /dev/xvdk) || (/usr/sbin/wipefs -fa /dev/xvdk && /usr/sbin/mkfs.ext4 /dev/xvdk)

mkdir /mnt/ebs-docker
mount /dev/xvdk /mnt/ebs-docker -t ext4
mkdir /mnt/ebs-docker/docker
ln -s /mnt/ebs-docker/docker /var/lib/docker