#!/bin/sh

. /etc/sysconfig/heat-params

if [ -n "$DOCKER_VOLUME_SIZE" ] && [ "$DOCKER_VOLUME_SIZE" -gt 0 ]; then
  if [ "$ENABLE_CINDER" == "False" ]; then
    # FIXME(yuanying): Use ephemeral disk for docker storage
    # Currently Ironic doesn't support cinder volumes,
    # so we must use preserved ephemeral disk instead of a cinder volume.
    device_path=$(readlink -f /dev/disk/by-label/ephemeral0)
  else
    attempts=60
    while [ ${attempts} -gt 0 ]; do
        device_name=$(ls /dev/disk/by-id | grep ${DOCKER_VOLUME:0:20}$)
        if [ -n "${device_name}" ]; then
            break
        fi
        echo "waiting for disk device"
        sleep 0.5
        udevadm trigger
        let attempts--
    done

    if [ -z "${device_name}" ]; then
        echo "ERROR: disk device does not exist" >&2
        exit 1
    fi

    device_path=/dev/disk/by-id/${device_name}
  fi
fi

$configure_docker_storage_driver

if [ "$DOCKER_STORAGE_DRIVER" = "overlay" ]; then
    if [ $(echo -e "$(uname -r)\n3.18" | sort -V | head -1) \
         = $(uname -r) ]; then
        ERROR_MESSAGE="OverlayFS requires at least Linux kernel 3.18. Cluster node kernel version: $(uname -r)"
        echo "ERROR: ${ERROR_MESSAGE}" >&2
        sh -c "${WAIT_CURL} --data-binary '{\"status\": \"FAILURE\", \"reason\": \"${ERROR_MESSAGE}\"}'"
    else
        configure_overlay
    fi
else
    configure_devicemapper
fi