OP#176 fix envsubst

start.sh

@@ -1,17 +1,19 @@
 #!/bin/bash
+
 set -e
 
-# Construct DATABASE_URL from individual vars if not set directly
-if [[ -z "${DATABASE_URL}" ]]; then
-  if [[ -z "${PG_USER}" || -z "${PG_PASSWORD}" || -z "${PG_HOST}" || -z "${PG_DBNAME}" ]]; then
-    echo "ERROR: DATABASE_URL not set and one of PG_USER/PG_PASSWORD/PG_HOST/PG_DBNAME missing"
-    exit 1
-  fi
-  export DATABASE_URL="postgresql://${PG_USER}:${PG_PASSWORD}@${PG_HOST}:${PG_PORT:-5432}/${PG_DBNAME}?sslmode=${PG_SSLMODE:-disable}"
-  echo "Constructed DATABASE_URL: ${DATABASE_URL}"
+if [[ "${DATABASE_URL}" == "" ]]; then
+  echo 'Missing DATABASE_URL'
+  echo 'example -e DATABASE_URL="user=<db user> password=<db user password> host=<db host> port=<db port> database=<db name>"'
+  exit 1
 fi
 
-# Strip single quotes from defaults (Alpine bash keeps them)
+trap shutdown INT
+
+function shutdown() {
+  pkill -SIGINT postgresql-prometheus-adapter
+}
+
 adapter_send_timeout=$(echo "${adapter_send_timeout:-'30s'}" | tr -d "'")
 web_listen_address=$(echo "${web_listen_address:-':9201'}" | tr -d "'")
 web_telemetry_path=$(echo "${web_telemetry_path:-'/metrics'}" | tr -d "'")