-if [[ ! -e $luks_dir/host-$HOSTNAME ]]; then
- echo "$0: error: no key for hostname at $luks_dir/host-$HOSTNAME" >&2
- exit 1
+
+luks_file=$luks_dir/host-$HOSTNAME
+if [[ ! -e $luks_file ]]; then
+ hostkeys=($luks_dir/host-*)
+ # if there is only one key, we might be deploying somewhere
+ # where dhcp doesnt give us a proper hostname, so use that.
+ if [[ ${#hostkeys[@]} == 1 && -e ${hostkeys[0]} ]]; then
+ luks_file=${hostkeys[0]}
+ else
+ echo "$0: error: no key for hostname at $luks_file" >&2
+ exit 1
+ fi