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#!/bin/bash
##############################################################################
# Copyright (c) 2017 Mirantis Inc. and others.
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
# This will generate a openstack-style config drive image suitable for
# use with cloud-init. You may optionally pass in an ssh public key
# (using the -k/--ssh-key option) and a user-data blog (using the
# -u/--user-data option).
usage () {
echo "usage: ${0##*/}: [--ssh-key <pubkey>] [--vendor-data <file>] [--user-data <file>] [--hostname <hostname>] <imagename>"
}
ARGS=$(getopt \
-o k:u:v:h: \
--long help,hostname:,ssh-key:,user-data:,vendor-data: -n "${0##*/}" \
-- "$@")
# shellcheck disable=SC2181
if [ $? -ne 0 ]; then
usage >&2
exit 2
fi
eval set -- "$ARGS"
while :; do
case "$1" in
--help)
usage
exit 0
;;
-k|--ssh-key)
ssh_key="$2"
shift 2
;;
-u|--user-data)
user_data="$2"
shift 2
;;
-v|--vendor-data)
vendor_data="$2"
shift 2
;;
-h|--hostname)
hostname="$2"
shift 2
;;
--) shift
break
;;
esac
done
config_image=$1
shift
if [ "${ssh_key}" ] && [ -f "${ssh_key}" ]; then
echo "adding pubkey from ${ssh_key}"
ssh_key_data=$(cat "${ssh_key}")
fi
uuid=$(uuidgen)
if ! [ "${hostname}" ]; then
hostname="${uuid}"
fi
trap 'rm -rf $config_dir' EXIT
config_dir=$(mktemp -t -d configXXXXXX)
if [ "${user_data}" ] && [ -f "${user_data}" ]; then
echo "adding user data from ${user_data}"
cp "${user_data}" "${config_dir}/user-data"
else
touch "${config_dir}/user-data"
fi
if [ "${vendor_data}" ] && [ -f "${vendor_data}" ]; then
echo "adding vendor data from ${vendor_data}"
cp "${vendor_data}" "${config_dir}/vendor-data"
fi
cat > "${config_dir}/meta-data" <<-EOF
instance-id: ${uuid}
hostname: ${hostname}
local-hostname: ${hostname}
EOF
if [ "${ssh_key_data}" ]; then
cat >> "${config_dir}/meta-data" <<-EOF
public-keys:
- |
${ssh_key_data}
EOF
fi
#PS1="debug> " bash --norc
echo "generating configuration image at ${config_image}"
if ! mkisofs -o "${config_image}" -V cidata -r -J --quiet "${config_dir}"; then
echo "ERROR: failed to create ${config_image}" >&2
exit 1
fi
chmod a+r "${config_image}"
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