public static Autoscaling scaleTo(ClusterResources target, ClusterModel model) {
        return new Autoscaling(Status.rescaling,
                               "Rescaling initiated due to load changes",
                               Optional.of(target),
                               model.at(),
                               model.peakLoad(),
                               model.idealLoad(),
                               model.metrics());
    }
Creates an autoscaling conclusion to scale.
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/Autoscaling.java