#!/bin/sh -e
# This script will DESTROY /dev/xvdb and /dev/xvdc and remount them
#   for Docker temp and volume storage.
# It is intended for EC2 instances with 2 ephemeral SSD instance stores
#   like the c3.xlarge instance type.

service docker stop || true

# Setup Instance Store 0 for Docker Temp
#   (set in /etc/default/docker)
DEV="/dev/xvdb"
umount $DEV 2>/dev/null || true
mkdir /mnt/docker-temp 2>/dev/null || rm -rf /mnt/docker-temp/*
mkfs.ext4 $DEV
mount -t ext4 -o noatime $DEV /mnt/docker-temp

# Setup Instance Store 1 for Docker volume storage
#DEV="/dev/xvdc"
#umount $DEV 2>/dev/null || true
mkdir /mnt/docker-volumes 2>/dev/null || rm -rf /mnt/docker-volumes/*
#mkfs.ext4 $DEV
rm -rf /var/lib/docker/vfs
rm -rf /var/lib/docker/volumes
mount -t ext4 -o noatime $DEV /mnt/docker-volumes
mkdir /mnt/docker-volumes/vfs
ln -s /mnt/docker-volumes/vfs /var/lib/docker/vfs
mkdir /mnt/docker-volumes/volumes
ln -s /mnt/docker-volumes/volumes /var/lib/docker/volumes

mount -t ext4 -o noatime $DEV /tmp && chmod 1777 /tmp && success || failure

service docker start