func TestGetAPIServerVirtualIP(t *testing.T) {
	var tests = []struct {
		name, svcSubnet, expectedIP string
		expectedErr                 bool
	}{
		{
			name:        "subnet mask 24",
			svcSubnet:   "10.96.0.12/24",
			expectedIP:  "10.96.0.1",
			expectedErr: false,
		},
		{
			name:        "subnet mask 12",
			svcSubnet:   "10.96.0.0/12",
			expectedIP:  "10.96.0.1",
			expectedErr: false,
		},

			}
		})
	}
}

func TestGetDNSIP(t *testing.T) {
	var tests = []struct {
		name, svcSubnet, expectedDNSIP string
		isDualStack                    bool
	}{
		{
			name:          "subnet mask 12",
			svcSubnet:     "10.96.0.0/12",
			expectedDNSIP: "10.96.0.10",
		},
		{
			name:          "subnet mask 26",
			svcSubnet:     "10.87.116.64/26",
			expectedDNSIP: "10.87.116.74",
		},
		{

	svcSubnet, err := GetKubernetesServiceCIDR(svcSubnetList)
	if err != nil {
		return nil, errors.Wrap(err, "unable to get internal Kubernetes Service IP from the given service CIDR")
	}
	internalAPIServerVirtualIP, err := netutils.GetIndexedIP(svcSubnet, 1)
	if err != nil {
		return nil, errors.Wrapf(err, "unable to get the first IP address from the given CIDR: %s", svcSubnet.String())
	}

# talk to each other directly.
#
# [{ "cluster_name": "cluster1","pod_subnet": "10.10.0.0/16","svc_subnet": "10.255.10.0/24","network_id": "0" },
#  { "cluster_name": "cluster2","pod_subnet": "10.20.0.0/16","svc_subnet": "10.255.20.0/24","network_id": "0" },
#  { "cluster_name": "cluster3","pod_subnet": "10.30.0.0/16","svc_subnet": "10.255.30.0/24","network_id": "1" }]
function load_cluster_topology() {
  CLUSTER_TOPOLOGY_CONFIG_FILE="${1}"