var tests = []struct {
		name           string
		etcd           *kubeadmapi.Etcd
		expectedErrors bool
	}{
		{
			name:           "either .Etcd.Local or .Etcd.External is required",
			etcd:           &kubeadmapi.Etcd{},
			expectedErrors: true,
		},
		{
			name: ".Etcd.Local and .Etcd.External are mutually exclusive",
			etcd: &kubeadmapi.Etcd{
				Local: &kubeadmapi.LocalEtcd{

      params_ref+=" --etcd-certfile=${ETCD_APISERVER_CLIENT_CERT_PATH}"
      params_ref+=" --etcd-keyfile=${ETCD_APISERVER_CLIENT_KEY_PATH}"
  elif [[ -z "${ETCD_APISERVER_CA_KEY:-}" && -z "${ETCD_APISERVER_CA_CERT:-}" && -z "${ETCD_APISERVER_SERVER_KEY:-}" && -z "${ETCD_APISERVER_SERVER_CERT:-}" && -z "${ETCD_APISERVER_CLIENT_KEY:-}" && -z "${ETCD_APISERVER_CLIENT_CERT:-}" ]]; then

// ClusterConfiguration contains cluster-wide configuration for a kubeadm cluster
type ClusterConfiguration struct {
	metav1.TypeMeta `json:",inline"`

	// Etcd holds configuration for etcd.
	// +optional
	Etcd Etcd `json:"etcd,omitempty"`

	// Networking holds configuration for the networking topology of the cluster.
	// +optional
	Networking Networking `json:"networking,omitempty"`

	}

	return true, nil
}

// UsingExternalEtcdCA determines whether the user is relying on an external etcd CA. We currently implicitly determine this is the case
// when the etcd CA Cert is present but the etcd CA Key is not.
// In case we are using an external etcd CA, the function validates the certificates signed by etcd CA that should be provided by the user.
func UsingExternalEtcdCA(cfg *kubeadmapi.ClusterConfiguration) (bool, error) {

				KubernetesVersion: dummyKubernetesVersionStr,
			},
		},
		{
			name: "external etcd configuration",
			cfg: kubeadmapiv1.ClusterConfiguration{
				Etcd: kubeadmapiv1.Etcd{
					External: &kubeadmapiv1.ExternalEtcd{
						Endpoints: []string{"https://some.etcd.com:2379"},
					},
				},
				KubernetesVersion: dummyKubernetesVersionStr,
			},

	"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
	cryptoutil "k8s.io/kubernetes/cmd/kubeadm/app/util/crypto"
)

const (
	externalEtcdCA   = "external-etcd-ca.crt"
	externalEtcdCert = "external-etcd.crt"
	externalEtcdKey  = "external-etcd.key"
)

// createShortLivedBootstrapToken creates the token used to manager kubeadm-certs
// and return the tokenID

```
~ mc admin config set myminio/ <key>
```

e.g: `mc admin config set myminio/ etcd` returns available `etcd` config args

```
~ mc admin config set play/ etcd
KEY:
etcd  federate multiple clusters for IAM and Bucket DNS

ARGS:
endpoints*       (csv)       comma separated list of etcd endpoints e.g. "http://localhost:2379"

	ServerCertSANs []string
	// PeerCertSANs sets extra Subject Alternative Names for the etcd peer signing cert.
	PeerCertSANs []string
}

// ExternalEtcd describes an external etcd cluster
type ExternalEtcd struct {

	// Endpoints of etcd members. Useful for using external etcd.
	// If not provided, kubeadm will run etcd in a static pod.
	Endpoints []string

	}); err != nil {
		return err
	}
	if err := s.AddGeneratedConversionFunc((*Etcd)(nil), (*kubeadm.Etcd)(nil), func(a, b interface{}, scope conversion.Scope) error {
		return Convert_v1beta3_Etcd_To_kubeadm_Etcd(a.(*Etcd), b.(*kubeadm.Etcd), scope)
	}); err != nil {
		return err
	}
	if err := s.AddGeneratedConversionFunc((*kubeadm.Etcd)(nil), (*Etcd)(nil), func(a, b interface{}, scope conversion.Scope) error {

etcd_request_duration_seconds_count{operation="foo",type="bar"} 1
# HELP etcd_requests_total [ALPHA] Etcd request counts for each operation and object type.
# TYPE etcd_requests_total counter
etcd_requests_total{operation="foo",type="bar"} 1
# HELP etcd_request_errors_total [ALPHA] Etcd failed request counts for each operation and object type.
# TYPE etcd_request_errors_total counter