Created
September 26, 2018 16:49
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Cloud Images Configurator
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#!/bin/sh | |
# 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: ${0##*/}: [--ssh-key <pubkey>] [--vendor-data <file>] [--user-data <file>] [--uuid <uuid>] [--hostname | |
<hostname>] <imagename>" | |
} | |
ARGS=$(getopt \ | |
-o k:u:v:h: \ | |
--long help,hostname:,ssh-key:,user-data:,uuid:,vendor-data: -n ${0##*/} \ | |
-- "$@") | |
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 | |
;; | |
--uuid) | |
uuid="$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 "$ssh_key") | |
fi | |
if ! [ "$uuid" ]; then | |
uuid=$(uuidgen) | |
fi | |
if ! [ "$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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