name : cloud-init-generator #!/bin/sh set -f LOG="" DEBUG_LEVEL=1 LOG_D="/run/cloud-init" LOG_F="/run/cloud-init/cloud-init-generator.log" ENABLE="enabled" DISABLE="disabled" RUN_ENABLED_FILE="$LOG_D/$ENABLE" RUN_DISABLED_FILE="$LOG_D/$DISABLE" CLOUD_TARGET_NAME="cloud-init.target" # lxc sets 'container', but lets make that explicitly a global CONTAINER="${container}" # start: template section CLOUD_SYSTEM_TARGET="/lib/systemd/system/cloud-init.target" dsidentify="/usr/lib/cloud-init/ds-identify" # end: template section debug() { local lvl="$1" shift [ "$lvl" -gt "$DEBUG_LEVEL" ] && return if [ -z "$LOG" ]; then { [ -d "$LOG_D" ] || mkdir -p "$LOG_D"; } && { : > "$LOG_F"; } >/dev/null 2>&1 && LOG="$LOG_F" || LOG="/dev/kmsg" fi echo "$@" >> "$LOG" } main() { local normal_d="$1" early_d="$2" late_d="$3" local target_name="multi-user.target" gen_d="$early_d" local link_path="$gen_d/${target_name}.wants/${CLOUD_TARGET_NAME}" local ds="" ret="" debug 1 "$0 normal=$normal_d early=$early_d late=$late_d" debug 2 "$0 $*" # ds=found => enable # ds=notfound => disable # <any> => disable debug 1 "checking for datasource" if [ ! -x "$dsidentify" ]; then debug 1 "no ds-identify in $dsidentify" ds=0 fi $dsidentify ds=$? debug 1 "ds-identify rc=$ds" if [ "$ds" = "1" -o "$ds" = "2" ]; then if [ "$ds" = "1" ]; then debug 1 "cloud-init is enabled but no datasource found, disabling" else debug 1 "cloud-init is disabled by kernel command line or etc_file" fi if [ -f "$link_path" ]; then if rm -f "$link_path"; then debug 1 "disabled. removed existing $link_path" else ret=$? debug 0 "[$ret] disable failed, remove $link_path" fi else debug 1 "already disabled: no change needed [no $link_path]" fi if [ -e "$RUN_ENABLED_FILE" ]; then debug 1 "removing $RUN_ENABLED_FILE and creating $RUN_DISABLED_FILE" rm -f "$RUN_ENABLED_FILE" fi : > "$RUN_DISABLED_FILE" elif [ "$ds" = "0" ]; then if [ -e "$link_path" ]; then debug 1 "already enabled: no change needed" else [ -d "${link_path%/*}" ] || mkdir -p "${link_path%/*}" || debug 0 "failed to make dir $link_path" if ln -snf "$CLOUD_SYSTEM_TARGET" "$link_path"; then debug 1 "enabled via $link_path -> $CLOUD_SYSTEM_TARGET" else ret=$? debug 0 "[$ret] enable failed:" \ "ln $CLOUD_SYSTEM_TARGET $link_path" fi fi if [ -e $RUN_DISABLED_FILE ]; then debug 1 "removing $RUN_DISABLED_FILE and creating $RUN_ENABLED_FILE" rm -f $RUN_DISABLED_FILE fi : > "$RUN_ENABLED_FILE" else debug 0 "unexpected result '$result' 'ds=$ds'" ret=3 fi return $ret } main "$@"