manager: systemd: improved error message

diff --git a/manager/knot_resolver_manager/kresd_controller/systemd/dbus_api.py b/manager/knot_resolver_manager/kresd_controller/systemd/dbus_api.py
index af895079aab417ec745cd8d43a43282e15d712ba..dc4e9d62ed5390693ff42ae0ba24a48272d720db 100644 (file)
--- a/manager/knot_resolver_manager/kresd_controller/systemd/dbus_api.py
+++ b/manager/knot_resolver_manager/kresd_controller/systemd/dbus_api.py
@@ -205,6 +205,7 @@ def start_transient_kresd_unit(
         logger.error(f"Failed to start transient '{name}':")
         for (k, v) in properties:
             logger.error(f"    {k}={v}")
+        logger.error(f"More useful details might be found in the service's log by running 'journalctl -u {name}'")
         raise SubprocessControllerException(f"Failed to start systemd transient service '{name}'") from e