Wait for Postgres in run script

rootfs/etc/s6-overlay/s6-rc.d/teslamate/run

@@ -52,9 +52,27 @@ for env_var in $(bashio::config 'env_vars|keys'); do
     export "${name}=${value}"
 done
 
+# Wait for PostgreSQL to be ready before continuing. The add-on can start
+# before the database is accepting connections (e.g. on a Home Assistant reboot
+# when both add-ons start together, or under load in CI), so retry instead of
+# failing immediately - TeslaMate has no built-in retry for this pre-check and
+# the s6 finish script would otherwise halt the whole add-on.
+bashio::log.info "Waiting for PostgreSQL at '$DATABASE_HOST:$DATABASE_PORT'..."
+pg_wait_attempt=0
+pg_wait_max=30
+until pg_isready -h "$DATABASE_HOST" -p "$DATABASE_PORT" > /dev/null 2>&1; do
+  pg_wait_attempt=$((pg_wait_attempt + 1))
+  if [[ "$pg_wait_attempt" -ge "$pg_wait_max" ]]; then
+    bashio::log.error "PostgreSQL at '$DATABASE_HOST' is not ready or unreachable after $((pg_wait_max * 2))s"
+    exit 1
+  fi
+  bashio::log.info "PostgreSQL not ready yet, retrying in 2s (${pg_wait_attempt}/${pg_wait_max})..."
+  sleep 2
+done
+bashio::log.info "PostgreSQL is ready"
+
 # Create the PostgreSQL database if it doesn't exist
 bashio::log.info "Checking for database '$DATABASE_NAME' on $DATABASE_HOST"
-if pg_isready -h "$DATABASE_HOST" -p "$DATABASE_PORT" > /dev/null 2>&1; then
 # Check the version of PostgreSQL database is v16.7 or later or v17.3 or later
 pg_version=$(PGPASSWORD="$DATABASE_PASS" psql -h "$DATABASE_HOST" -p "$DATABASE_PORT" -U "$DATABASE_USER" postgres -Atqc "SELECT regexp_replace(version(), 'PostgreSQL ([^ ]+) .*', '\\1') AS version")
 major_version=$(echo "$pg_version" | cut -d '.' -f 1)
@@ -87,10 +105,6 @@ if pg_isready -h "$DATABASE_HOST" -p "$DATABASE_PORT" > /dev/null 2>&1; then
     exit 1
   fi
 fi
-else
-  bashio::log.error "PostgreSQL at '$DATABASE_HOST' is not ready or unreachable"
-  exit 1
-fi
 
 # Import dashboards
 if bashio::config.true 'grafana_import_dashboards'; then