The Route Controller Manager consists of additional controllers that enhance Openshift Routes, Ingresses, and Services.
Controller ensures that zero or more routes exist to match any supported ingress. The controller creates a controller owner reference from the route to the parent ingress, allowing users to orphan their ingress. All owned routes have specific spec fields managed (those attributes present on the ingress), while any other fields may be modified by the user.
Controller is responsible for allocating ingress ip addresses to Service objects of type LoadBalancer.
It allocates adresses from spec.observedConfig.ingress.ingressIPNetworkCIDR range in
openshiftcontrollermanagers.operator.openshift.io cluster config and can be used to assign a unique external IP addresses.