.. _config_http_conn_man_rds: Route discovery service (RDS) ============================= The route discovery service (RDS) API is an optional API that Envoy will call to dynamically fetch :ref:`route configurations `. A route configuration includes both HTTP header modifications, virtual hosts, and the individual route entries contained within each virtual host. Each :ref:`HTTP connection manager filter ` can independently fetch its own route configuration via the API. Optionally, the :ref:`virtual host discovery service ` can be used to fetch virtual hosts separately from the route configuration. * :ref:`v2 API reference ` Statistics ---------- RDS has a :ref:`statistics ` tree rooted at *http..rds..*. Any ``:`` character in the ``route_config_name`` name gets replaced with ``_`` in the stats tree.