diff --git a/install.sh b/install.sh
index 202f70e..f0aec85 100755
--- a/install.sh
+++ b/install.sh
@@ -239,10 +239,14 @@ fetch() { curl -fsSL "$REPO_RAW/$1" -o "$2" || die "Download $1 fehlgeschlagen."
 fetch_conf() {
   fetch "$1" "$2.tmp"
   set -a; [ -r /etc/default/telegraf ] && . /etc/default/telegraf; set +a
-  envsubst '${NODE_NAME} ${PVE_TOKEN} ${PVE_NODE} ${PVE_URL} ${APACHE_LOG}' < "$2.tmp" > "$2"
+  envsubst '${NODE_NAME} ${PROM_URL} ${LOKI_URL} ${TELEGRAF_TOKEN} ${PVE_TOKEN} ${PVE_NODE} ${PVE_URL} ${APACHE_LOG}' < "$2.tmp" > "$2"
+  if grep -q '\${' "$2"; then
+    log "WARNUNG: $2 enthaelt noch unaufgeloeste Platzhalter:"
+    grep -o '\${[A-Z_]*}' "$2" | sort -u >&2
+  fi
   rm -f "$2.tmp"
 }
-fetch telegraf/base.conf /etc/telegraf/telegraf.conf
+fetch_conf telegraf/base.conf /etc/telegraf/telegraf.conf
 rm -f /etc/telegraf/telegraf.d/*.conf
 [ "$HAS_DOCKER" -eq 1 ] && { fetch telegraf/docker.conf /etc/telegraf/telegraf.d/docker.conf; usermod -aG docker telegraf 2>/dev/null || true; }
 case "$ROLE" in