}

	// failure: bad cidrs in config
	clusterCIDRs, dualStack, err := processCIDRs(ccmConfig.ComponentConfig.KubeCloudShared.ClusterCIDR)
	if err != nil {
		return nil, false, err
	}

	// failure: more than one cidr but they are not configured as dual stack
	if len(clusterCIDRs) > 1 && !dualStack {

		var err error
		ic.legacyIPAM, err = createLegacyIPAM(ctx, ic, nodeInformer, cloud, kubeClient, clusterCIDRs, serviceCIDR, nodeCIDRMaskSizes)
		if err != nil {
			return nil, err
		}
	} else {
		var err error

		allocatorParams := ipam.CIDRAllocatorParams{
			ClusterCIDRs:         clusterCIDRs,
			ServiceCIDR:          ic.serviceCIDR,
			SecondaryServiceCIDR: ic.secondaryServiceCIDR,

	<-ctx.Done()
}

func createLegacyIPAM(
	ctx context.Context,
	ic *Controller,
	nodeInformer coreinformers.NodeInformer,
	cloud cloudprovider.Interface,
	kubeClient clientset.Interface,
	clusterCIDRs []*net.IPNet,
	serviceCIDR *net.IPNet,
	nodeCIDRMaskSizes []int,
) (*fakeController, error) {
	return nil, errors.New("Error trying to Init(): legacy cloud provider support disabled at build time")

	Run(ctx context.Context)
}

// CIDRAllocatorParams is parameters that's required for creating new
// cidr range allocator.
type CIDRAllocatorParams struct {
	// ClusterCIDRs is list of cluster cidrs.
	ClusterCIDRs []*net.IPNet
	// ServiceCIDR is primary service cidr for cluster.
	ServiceCIDR *net.IPNet
	// SecondaryServiceCIDR is secondary service cidr for cluster.
	SecondaryServiceCIDR *net.IPNet

  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.ListMeta metadata = 1;

  // items is the list of ClusterCIDRs.
  repeated ClusterCIDR items = 2;
}

// ClusterCIDRSpec defines the desired state of ClusterCIDR.
message ClusterCIDRSpec {
  // nodeSelector defines which nodes the config is applicable to.