if err != nil {
		t.Fatal(err)
	}
	defer conf.teardown()

	var confLines []string
	for _, ns := range nameservers {
		confLines = append(confLines, "nameserver "+ns)
	}
	if rotate {
		confLines = append(confLines, "options rotate")
	}

	if err := conf.writeAndUpdate(confLines); err != nil {
		t.Fatal(err)
	}

	var usedServers []string

 *
 * It is possible to cancel the finding process by canceling its call.
 *
 * Implementations of this interface are not thread-safe. Each instance is thread-confined to the
 * thread executing the call.
 */
interface RoutePlanner {
  val address: Address

  /** Follow-ups for failed plans and plans that lost a race. */
  val deferredPlans: ArrayDeque<Plan>

				return model.DiscoverableFromSameCluster
			}
		} else {
			// MCS cluster.local mode is not enabled, so requests to the cluster.local host are not confined
			// to the same cluster. Use the same discoverability policy as for clusterset.local.
			ec.clusterLocalPolicySelector = ec.clusterSetLocalPolicySelector
		}

		return ec
	}

// https://github.com/kubernetes/kubernetes/blob/954996e231074dc7429f7be1256a579bedd8344c/pkg/kubelet/dockershim/network/cni/cni.go#L144-L184
func getDefaultCNINetwork(confDir string) (string, error) {
	files, err := libcni.ConfFiles(confDir, []string{".conf", ".conflist"})
	switch {
	case err != nil:
		return "", err
	case len(files) == 0:
		return "", fmt.Errorf("no networks found in %s", confDir)
	}

	sort.Strings(files)