kubectl: Use metrics-server for kubectl top commands

pkg/kubectl/cmd/BUILD

@@ -140,6 +140,7 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/version:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/watch:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/util/flag:go_default_library",
+        "//vendor/k8s.io/client-go/discovery:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes/typed/core/v1:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes/typed/rbac/v1:go_default_library",
@@ -149,6 +150,9 @@ go_library(
         "//vendor/k8s.io/client-go/tools/remotecommand:go_default_library",
         "//vendor/k8s.io/client-go/transport/spdy:go_default_library",
         "//vendor/k8s.io/kube-openapi/pkg/util/proto:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/apis/metrics:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/apis/metrics/v1beta1:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/client/clientset_generated/clientset:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
     ],
 )
@@ -224,6 +228,7 @@ go_test(
         "//pkg/printers:go_default_library",
         "//pkg/printers/internalversion:go_default_library",
         "//pkg/util/strings:go_default_library",
+        "//vendor/github.com/googleapis/gnostic/OpenAPIv2:go_default_library",
         "//vendor/github.com/spf13/cobra:go_default_library",
         "//vendor/github.com/stretchr/testify/assert:go_default_library",
         "//vendor/gopkg.in/yaml.v2:go_default_library",
@@ -245,11 +250,15 @@ go_test(
         "//vendor/k8s.io/apimachinery/pkg/util/strategicpatch:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/strategicpatch/testing:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/version:go_default_library",
         "//vendor/k8s.io/client-go/dynamic:go_default_library",
         "//vendor/k8s.io/client-go/rest:go_default_library",
         "//vendor/k8s.io/client-go/rest/fake:go_default_library",
+        "//vendor/k8s.io/client-go/testing:go_default_library",
         "//vendor/k8s.io/client-go/tools/remotecommand:go_default_library",
         "//vendor/k8s.io/metrics/pkg/apis/metrics/v1alpha1:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/apis/metrics/v1beta1:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/client/clientset_generated/clientset/fake:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
     ],
 )

pkg/kubectl/cmd/testing/BUILD

@@ -40,6 +40,7 @@ go_library(
         "//vendor/k8s.io/client-go/kubernetes:go_default_library",
         "//vendor/k8s.io/client-go/rest:go_default_library",
         "//vendor/k8s.io/client-go/rest/fake:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/client/clientset_generated/clientset:go_default_library",
     ],
 )
 

pkg/kubectl/cmd/testing/fake.go

@@ -50,6 +50,7 @@ import (
 	"k8s.io/kubernetes/pkg/kubectl/resource"
 	"k8s.io/kubernetes/pkg/kubectl/validation"
 	"k8s.io/kubernetes/pkg/printers"
+	metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
 )
 
 // +k8s:deepcopy-gen=true
@@ -245,6 +246,7 @@ type TestFactory struct {
 	TmpDir             string
 	CategoryExpander   categories.CategoryExpander
 	SkipDiscovery      bool
+	MetricsClientSet   metricsclientset.Interface
 
 	ClientForMappingFunc             func(mapping *meta.RESTMapping) (resource.RESTClient, error)
 	UnstructuredClientForMappingFunc func(mapping *meta.RESTMapping) (resource.RESTClient, error)
@@ -315,6 +317,10 @@ func (f *FakeFactory) KubernetesClientSet() (*kubernetes.Clientset, error) {
 	return nil, nil
 }
 
+func (f *FakeFactory) MetricsClientSet() (metricsclientset.Interface, error) {
+	return f.tf.MetricsClientSet, f.tf.Err
+}
+
 func (f *FakeFactory) ClientSet() (internalclientset.Interface, error) {
 	return nil, nil
 }
@@ -675,6 +681,10 @@ func (f *fakeAPIFactory) KubernetesClientSet() (*kubernetes.Clientset, error) {
 	return clientset, f.tf.Err
 }
 
+func (f *fakeAPIFactory) MetricsClientSet() (metricsclientset.Interface, error) {
+	return f.tf.MetricsClientSet, f.tf.Err
+}
+
 func (f *fakeAPIFactory) ClientSet() (internalclientset.Interface, error) {
 	// Swap the HTTP client out of the REST client with the fake
 	// version.

pkg/kubectl/cmd/top.go

@@ -19,8 +19,10 @@ package cmd
 import (
 	"io"
 
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/util/i18n"
+	metricsapi "k8s.io/metrics/pkg/apis/metrics"
 
 	"github.com/spf13/cobra"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
@@ -30,6 +32,9 @@ import (
 type TopOptions struct{}
 
 var (
+	supportedMetricsAPIVersions = []string{
+		"v1beta1",
+	}
 	topLong = templates.LongDesc(i18n.T(`
 		Display Resource (CPU/Memory/Storage) usage.
 
@@ -51,3 +56,19 @@ func NewCmdTop(f cmdutil.Factory, out, errOut io.Writer) *cobra.Command {
 	cmd.AddCommand(NewCmdTopPod(f, nil, out))
 	return cmd
 }
+
+func SupportedMetricsAPIVersionAvailable(discoveredAPIGroups *metav1.APIGroupList) bool {
+	for _, discoveredAPIGroup := range discoveredAPIGroups.Groups {
+		if discoveredAPIGroup.Name != metricsapi.GroupName {
+			continue
+		}
+		for _, version := range discoveredAPIGroup.Versions {
+			for _, supportedVersion := range supportedMetricsAPIVersions {
+				if version.Version == supportedVersion {
+					return true
+				}
+			}
+		}
+	}
+	return false
+}

pkg/kubectl/cmd/top_node.go

@@ -25,11 +25,15 @@ import (
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/client-go/discovery"
 	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/metricsutil"
 	"k8s.io/kubernetes/pkg/kubectl/util/i18n"
+	metricsapi "k8s.io/metrics/pkg/apis/metrics"
+	metricsV1beta1api "k8s.io/metrics/pkg/apis/metrics/v1beta1"
+	metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
 )
 
 // TopNodeOptions contains all the options for running the top-node cli command.
@@ -40,6 +44,8 @@ type TopNodeOptions struct {
 	HeapsterOptions HeapsterTopOptions
 	Client          *metricsutil.HeapsterMetricsClient
 	Printer         *metricsutil.TopCmdPrinter
+	DiscoveryClient discovery.DiscoveryInterface
+	MetricsClient   metricsclientset.Interface
 }
 
 type HeapsterTopOptions struct {
@@ -123,8 +129,16 @@ func (o *TopNodeOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []
 	if err != nil {
 		return err
 	}
+
+	o.DiscoveryClient = clientset.DiscoveryClient
+	o.MetricsClient, err = f.MetricsClientSet()
+	if err != nil {
+		return err
+	}
+
 	o.NodeClient = clientset.CoreV1()
 	o.Client = metricsutil.NewHeapsterMetricsClient(clientset.CoreV1(), o.HeapsterOptions.Namespace, o.HeapsterOptions.Scheme, o.HeapsterOptions.Service, o.HeapsterOptions.Port)
+
 	o.Printer = metricsutil.NewTopCmdPrinter(out)
 	return nil
 }
@@ -138,15 +152,35 @@ func (o *TopNodeOptions) Validate() error {
 
 func (o TopNodeOptions) RunTopNode() error {
 	var err error
-	selector := labels.Everything().String()
+	selector := labels.Everything()
 	if len(o.Selector) > 0 {
-		selector = o.Selector
+		selector, err = labels.Parse(o.Selector)
+		if err != nil {
+			return err
+		}
 	}
-	metrics, err := o.Client.GetNodeMetrics(o.ResourceName, selector)
+
+	apiGroups, err := o.DiscoveryClient.ServerGroups()
 	if err != nil {
 		return err
 	}
-	if len(metrics) == 0 {
+
+	metricsAPIAvailable := SupportedMetricsAPIVersionAvailable(apiGroups)
+
+	metrics := &metricsapi.NodeMetricsList{}
+	if metricsAPIAvailable {
+		metrics, err = getNodeMetricsFromMetricsAPI(o.MetricsClient, o.ResourceName, selector)
+		if err != nil {
+			return err
+		}
+	} else {
+		metrics, err = o.Client.GetNodeMetrics(o.ResourceName, selector.String())
+		if err != nil {
+			return err
+		}
+	}
+
+	if len(metrics.Items) == 0 {
 		return errors.New("metrics not available yet")
 	}
 
@@ -159,7 +193,7 @@ func (o TopNodeOptions) RunTopNode() error {
 		nodes = append(nodes, *node)
 	} else {
 		nodeList, err := o.NodeClient.Nodes().List(metav1.ListOptions{
-			LabelSelector: selector,
+			LabelSelector: selector.String(),
 		})
 		if err != nil {
 			return err
@@ -173,5 +207,30 @@ func (o TopNodeOptions) RunTopNode() error {
 		allocatable[n.Name] = n.Status.Allocatable
 	}
 
-	return o.Printer.PrintNodeMetrics(metrics, allocatable)
+	return o.Printer.PrintNodeMetrics(metrics.Items, allocatable)
+}
+
+func getNodeMetricsFromMetricsAPI(metricsClient metricsclientset.Interface, resourceName string, selector labels.Selector) (*metricsapi.NodeMetricsList, error) {
+	var err error
+	versionedMetrics := &metricsV1beta1api.NodeMetricsList{}
+	mc := metricsClient.Metrics()
+	nm := mc.NodeMetricses()
+	if resourceName != "" {
+		m, err := nm.Get(resourceName, metav1.GetOptions{})
+		if err != nil {
+			return nil, err
+		}
+		versionedMetrics.Items = []metricsV1beta1api.NodeMetrics{*m}
+	} else {
+		versionedMetrics, err = nm.List(metav1.ListOptions{LabelSelector: selector.String()})
+		if err != nil {
+			return nil, err
+		}
+	}
+	metrics := &metricsapi.NodeMetricsList{}
+	err = metricsV1beta1api.Convert_v1beta1_NodeMetricsList_To_metrics_NodeMetricsList(versionedMetrics, metrics, nil)
+	if err != nil {
+		return nil, err
+	}
+	return metrics, nil
 }

pkg/kubectl/cmd/top_pod.go

@@ -25,11 +25,15 @@ import (
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/client-go/discovery"
 	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/metricsutil"
 	"k8s.io/kubernetes/pkg/kubectl/util/i18n"
+	metricsapi "k8s.io/metrics/pkg/apis/metrics"
+	metricsv1beta1api "k8s.io/metrics/pkg/apis/metrics/v1beta1"
+	metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
 
 	"github.com/golang/glog"
 	"github.com/spf13/cobra"
@@ -45,6 +49,8 @@ type TopPodOptions struct {
 	HeapsterOptions HeapsterTopOptions
 	Client          *metricsutil.HeapsterMetricsClient
 	Printer         *metricsutil.TopCmdPrinter
+	DiscoveryClient discovery.DiscoveryInterface
+	MetricsClient   metricsclientset.Interface
 }
 
 const metricsCreationDelay = 2 * time.Minute
@@ -119,8 +125,16 @@ func (o *TopPodOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []s
 	if err != nil {
 		return err
 	}
+
+	o.DiscoveryClient = clientset.DiscoveryClient
+	o.MetricsClient, err = f.MetricsClientSet()
+	if err != nil {
+		return err
+	}
+
 	o.PodClient = clientset.CoreV1()
 	o.Client = metricsutil.NewHeapsterMetricsClient(clientset.CoreV1(), o.HeapsterOptions.Namespace, o.HeapsterOptions.Scheme, o.HeapsterOptions.Service, o.HeapsterOptions.Port)
+
 	o.Printer = metricsutil.NewTopCmdPrinter(out)
 	return nil
 }
@@ -141,10 +155,30 @@ func (o TopPodOptions) RunTopPod() error {
 			return err
 		}
 	}
-	metrics, err := o.Client.GetPodMetrics(o.Namespace, o.ResourceName, o.AllNamespaces, selector)
+
+	apiGroups, err := o.DiscoveryClient.ServerGroups()
+	if err != nil {
+		return err
+	}
+
+	metricsAPIAvailable := SupportedMetricsAPIVersionAvailable(apiGroups)
+
+	metrics := &metricsapi.PodMetricsList{}
+	if metricsAPIAvailable {
+		metrics, err = getMetricsFromMetricsAPI(o.MetricsClient, o.Namespace, o.ResourceName, o.AllNamespaces, selector)
+		if err != nil {
+			return err
+		}
+	} else {
+		metrics, err = o.Client.GetPodMetrics(o.Namespace, o.ResourceName, o.AllNamespaces, selector)
+		if err != nil {
+			return err
+		}
+	}
+
 	// TODO: Refactor this once Heapster becomes the API server.
 	// First we check why no metrics have been received.
-	if len(metrics) == 0 {
+	if len(metrics.Items) == 0 {
 		// If the API server query is successful but all the pods are newly created,
 		// the metrics are probably not ready yet, so we return the error here in the first place.
 		e := verifyEmptyMetrics(o, selector)
@@ -155,7 +189,35 @@ func (o TopPodOptions) RunTopPod() error {
 	if err != nil {
 		return err
 	}
-	return o.Printer.PrintPodMetrics(metrics, o.PrintContainers, o.AllNamespaces)
+
+	return o.Printer.PrintPodMetrics(metrics.Items, o.PrintContainers, o.AllNamespaces)
+}
+
+func getMetricsFromMetricsAPI(metricsClient metricsclientset.Interface, namespace, resourceName string, allNamespaces bool, selector labels.Selector) (*metricsapi.PodMetricsList, error) {
+	var err error
+	ns := metav1.NamespaceAll
+	if !allNamespaces {
+		ns = namespace
+	}
+	versionedMetrics := &metricsv1beta1api.PodMetricsList{}
+	if resourceName != "" {
+		m, err := metricsClient.Metrics().PodMetricses(ns).Get(resourceName, metav1.GetOptions{})
+		if err != nil {
+			return nil, err
+		}
+		versionedMetrics.Items = []metricsv1beta1api.PodMetrics{*m}
+	} else {
+		versionedMetrics, err = metricsClient.Metrics().PodMetricses(ns).List(metav1.ListOptions{LabelSelector: selector.String()})
+		if err != nil {
+			return nil, err
+		}
+	}
+	metrics := &metricsapi.PodMetricsList{}
+	err = metricsv1beta1api.Convert_v1beta1_PodMetricsList_To_metrics_PodMetricsList(versionedMetrics, metrics, nil)
+	if err != nil {
+		return nil, err
+	}
+	return metrics, nil
 }
 
 func verifyEmptyMetrics(o TopPodOptions, selector labels.Selector) error {

pkg/kubectl/cmd/top_test.go

@@ -29,12 +29,14 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
-	metricsapi "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
+	metricsv1alpha1api "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
+	metricsv1beta1api "k8s.io/metrics/pkg/apis/metrics/v1beta1"
 )
 
 const (
 	baseHeapsterServiceAddress = "/api/v1/namespaces/kube-system/services/http:heapster:/proxy"
 	baseMetricsAddress         = baseHeapsterServiceAddress + "/apis/metrics"
+	baseMetricsServerAddress   = "/apis/metrics.k8s.io/v1beta1"
 	metricsApiVersion          = "v1alpha1"
 )
 
@@ -58,12 +60,12 @@ func marshallBody(metrics interface{}) (io.ReadCloser, error) {
 	return ioutil.NopCloser(bytes.NewReader(result)), nil
 }
 
-func testNodeMetricsData() (*metricsapi.NodeMetricsList, *v1.NodeList) {
-	metrics := &metricsapi.NodeMetricsList{
+func testNodeV1alpha1MetricsData() (*metricsv1alpha1api.NodeMetricsList, *v1.NodeList) {
+	metrics := &metricsv1alpha1api.NodeMetricsList{
 		ListMeta: metav1.ListMeta{
 			ResourceVersion: "1",
 		},
-		Items: []metricsapi.NodeMetrics{
+		Items: []metricsv1alpha1api.NodeMetrics{
 			{
 				ObjectMeta: metav1.ObjectMeta{Name: "node1", ResourceVersion: "10"},
 				Window:     metav1.Duration{Duration: time.Minute},
@@ -113,3 +115,59 @@ func testNodeMetricsData() (*metricsapi.NodeMetricsList, *v1.NodeList) {
 	}
 	return metrics, nodes
 }
+
+func testNodeV1beta1MetricsData() (*metricsv1beta1api.NodeMetricsList, *v1.NodeList) {
+	metrics := &metricsv1beta1api.NodeMetricsList{
+		ListMeta: metav1.ListMeta{
+			ResourceVersion: "1",
+		},
+		Items: []metricsv1beta1api.NodeMetrics{
+			{
+				ObjectMeta: metav1.ObjectMeta{Name: "node1", ResourceVersion: "10", Labels: map[string]string{"key": "value"}},
+				Window:     metav1.Duration{Duration: time.Minute},
+				Usage: v1.ResourceList{
+					v1.ResourceCPU:     *resource.NewMilliQuantity(1, resource.DecimalSI),
+					v1.ResourceMemory:  *resource.NewQuantity(2*(1024*1024), resource.DecimalSI),
+					v1.ResourceStorage: *resource.NewQuantity(3*(1024*1024), resource.DecimalSI),
+				},
+			},
+			{
+				ObjectMeta: metav1.ObjectMeta{Name: "node2", ResourceVersion: "11"},
+				Window:     metav1.Duration{Duration: time.Minute},
+				Usage: v1.ResourceList{
+					v1.ResourceCPU:     *resource.NewMilliQuantity(5, resource.DecimalSI),
+					v1.ResourceMemory:  *resource.NewQuantity(6*(1024*1024), resource.DecimalSI),
+					v1.ResourceStorage: *resource.NewQuantity(7*(1024*1024), resource.DecimalSI),
+				},
+			},
+		},
+	}
+	nodes := &v1.NodeList{
+		ListMeta: metav1.ListMeta{
+			ResourceVersion: "15",
+		},
+		Items: []v1.Node{
+			{
+				ObjectMeta: metav1.ObjectMeta{Name: "node1", ResourceVersion: "10"},
+				Status: v1.NodeStatus{
+					Allocatable: v1.ResourceList{
+						v1.ResourceCPU:     *resource.NewMilliQuantity(10, resource.DecimalSI),
+						v1.ResourceMemory:  *resource.NewQuantity(20*(1024*1024), resource.DecimalSI),
+						v1.ResourceStorage: *resource.NewQuantity(30*(1024*1024), resource.DecimalSI),
+					},
+				},
+			},
+			{
+				ObjectMeta: metav1.ObjectMeta{Name: "node2", ResourceVersion: "11"},
+				Status: v1.NodeStatus{
+					Allocatable: v1.ResourceList{
+						v1.ResourceCPU:     *resource.NewMilliQuantity(50, resource.DecimalSI),
+						v1.ResourceMemory:  *resource.NewQuantity(60*(1024*1024), resource.DecimalSI),
+						v1.ResourceStorage: *resource.NewQuantity(70*(1024*1024), resource.DecimalSI),
+					},
+				},
+			},
+		},
+	}
+	return metrics, nodes
+}

pkg/kubectl/cmd/util/BUILD

@@ -81,6 +81,7 @@ go_library(
         "//vendor/k8s.io/client-go/scale:go_default_library",
         "//vendor/k8s.io/client-go/tools/clientcmd:go_default_library",
         "//vendor/k8s.io/client-go/util/homedir:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/client/clientset_generated/clientset:go_default_library",
         "//vendor/k8s.io/utils/exec:go_default_library",
     ],
 )

pkg/kubectl/cmd/util/clientcache.go

@@ -27,6 +27,7 @@ import (
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 	oldclient "k8s.io/kubernetes/pkg/client/unversioned"
 	"k8s.io/kubernetes/pkg/version"
+	metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
 )
 
 func NewClientCache(loader clientcmd.ClientConfig, discoveryClientFactory DiscoveryClientFactory) *ClientCache {
@@ -58,6 +59,7 @@ type ClientCache struct {
 	discoveryClient        discovery.DiscoveryInterface
 
 	kubernetesClientCache kubernetesClientCache
+	metricsClientCache    metricsClientCache
 }
 
 // kubernetesClientCache creates a new kubernetes.Clientset one time
@@ -71,6 +73,17 @@ type kubernetesClientCache struct {
 	err error
 }
 
+// metricsClientCache creates a new metricsclientset.Clientset one time
+// and then returns the result for all future requests
+type metricsClientCache struct {
+	// once makes sure the client is only initialized once
+	once sync.Once
+	// client is the cached client value
+	client *metricsclientset.Clientset
+	// err is the cached error value
+	err error
+}
+
 // KubernetesClientSetForVersion returns a new kubernetes.Clientset.  It will cache the value
 // the first time it is called and return the cached value on subsequent calls.
 // If an error is encountered the first time KubernetesClientSetForVersion is called,
@@ -87,6 +100,22 @@ func (c *ClientCache) KubernetesClientSetForVersion(requiredVersion *schema.Grou
 	return c.kubernetesClientCache.client, c.kubernetesClientCache.err
 }
 
+// MetricsClientSetForVersion returns a new kubernetes.Clientset.  It will cache the value
+// the first time it is called and return the cached value on subsequent calls.
+// If an error is encountered the first time MetircsClientSetForVersion is called,
+// the error will be cached.
+func (c *ClientCache) MetricsClientSetForVersion(requiredVersion *schema.GroupVersion) (*metricsclientset.Clientset, error) {
+	c.metricsClientCache.once.Do(func() {
+		config, err := c.ClientConfigForVersion(requiredVersion)
+		if err != nil {
+			c.kubernetesClientCache.err = err
+			return
+		}
+		c.metricsClientCache.client, c.metricsClientCache.err = metricsclientset.NewForConfig(config)
+	})
+	return c.metricsClientCache.client, c.metricsClientCache.err
+}
+
 // also looks up the discovery client.  We can't do this during init because the flags won't have been set
 // because this is constructed pre-command execution before the command tree is
 // even set up. Requires the lock to already be acquired

pkg/kubectl/cmd/util/factory.go

@@ -48,6 +48,7 @@ import (
 	"k8s.io/kubernetes/pkg/kubectl/resource"
 	"k8s.io/kubernetes/pkg/kubectl/validation"
 	"k8s.io/kubernetes/pkg/printers"
+	metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
 )
 
 const (
@@ -95,6 +96,9 @@ type ClientAccessFactory interface {
 	// KubernetesClientSet gives you back an external clientset
 	KubernetesClientSet() (*kubernetes.Clientset, error)
 
+	// MetricsClientSet gives you back an external clientset for the metrics API
+	MetricsClientSet() (metricsclientset.Interface, error)
+
 	// Returns a RESTClient for accessing Kubernetes resources or an error.
 	RESTClient() (*restclient.RESTClient, error)
 	// Returns a client.Config for accessing the Kubernetes server.

pkg/kubectl/cmd/util/factory_client_access.go

@@ -31,6 +31,7 @@ import (
 	"time"
 
 	"k8s.io/api/core/v1"
+	metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
@@ -201,6 +202,10 @@ func (f *ring0Factory) KubernetesClientSet() (*kubernetes.Clientset, error) {
 	return f.clientCache.KubernetesClientSetForVersion(nil)
 }
 
+func (f *ring0Factory) MetricsClientSet() (metricsclientset.Interface, error) {
+	return f.clientCache.MetricsClientSetForVersion(nil)
+}
+
 func (f *ring0Factory) ClientSet() (internalclientset.Interface, error) {
 	return f.clientCache.ClientSetForVersion(nil)
 }

pkg/kubectl/metricsutil/BUILD

@@ -23,6 +23,7 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes/typed/core/v1:go_default_library",
+        "//vendor/k8s.io/metrics/pkg/apis/metrics:go_default_library",
         "//vendor/k8s.io/metrics/pkg/apis/metrics/v1alpha1:go_default_library",
     ],
 )

pkg/kubectl/metricsutil/metrics_client.go

@@ -26,7 +26,8 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/kubernetes/pkg/apis/core/validation"
-	metricsapi "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
+	metricsapi "k8s.io/metrics/pkg/apis/metrics"
+	metricsv1alpha1api "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
 )
 
 const (
@@ -97,67 +98,73 @@ func nodeMetricsUrl(name string) (string, error) {
 	return fmt.Sprintf("%s/nodes/%s", metricsRoot, name), nil
 }
 
-func (cli *HeapsterMetricsClient) GetNodeMetrics(nodeName string, selector string) ([]metricsapi.NodeMetrics, error) {
+func (cli *HeapsterMetricsClient) GetNodeMetrics(nodeName string, selector string) (*metricsapi.NodeMetricsList, error) {
 	params := map[string]string{"labelSelector": selector}
 	path, err := nodeMetricsUrl(nodeName)
 	if err != nil {
-		return []metricsapi.NodeMetrics{}, err
+		return nil, err
 	}
 	resultRaw, err := GetHeapsterMetrics(cli, path, params)
 	if err != nil {
-		return []metricsapi.NodeMetrics{}, err
+		return nil, err
 	}
-	metrics := make([]metricsapi.NodeMetrics, 0)
+	versionedMetrics := metricsv1alpha1api.NodeMetricsList{}
 	if len(nodeName) == 0 {
-		metricsList := metricsapi.NodeMetricsList{}
-		err = json.Unmarshal(resultRaw, &metricsList)
+		err = json.Unmarshal(resultRaw, &versionedMetrics)
 		if err != nil {
-			return []metricsapi.NodeMetrics{}, fmt.Errorf("failed to unmarshall heapster response: %v", err)
+			return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err)
 		}
-		metrics = append(metrics, metricsList.Items...)
 	} else {
-		var singleMetric metricsapi.NodeMetrics
+		var singleMetric metricsv1alpha1api.NodeMetrics
 		err = json.Unmarshal(resultRaw, &singleMetric)
 		if err != nil {
-			return []metricsapi.NodeMetrics{}, fmt.Errorf("failed to unmarshall heapster response: %v", err)
+			return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err)
 		}
-		metrics = append(metrics, singleMetric)
+		versionedMetrics.Items = []metricsv1alpha1api.NodeMetrics{singleMetric}
+	}
+	metrics := &metricsapi.NodeMetricsList{}
+	err = metricsv1alpha1api.Convert_v1alpha1_NodeMetricsList_To_metrics_NodeMetricsList(&versionedMetrics, metrics, nil)
+	if err != nil {
+		return nil, err
 	}
 	return metrics, nil
 }
 
-func (cli *HeapsterMetricsClient) GetPodMetrics(namespace string, podName string, allNamespaces bool, selector labels.Selector) ([]metricsapi.PodMetrics, error) {
+func (cli *HeapsterMetricsClient) GetPodMetrics(namespace string, podName string, allNamespaces bool, selector labels.Selector) (*metricsapi.PodMetricsList, error) {
 	if allNamespaces {
 		namespace = metav1.NamespaceAll
 	}
 	path, err := podMetricsUrl(namespace, podName)
 	if err != nil {
-		return []metricsapi.PodMetrics{}, err
+		return nil, err
 	}
 
 	params := map[string]string{"labelSelector": selector.String()}
-	allMetrics := make([]metricsapi.PodMetrics, 0)
+	versionedMetrics := metricsv1alpha1api.PodMetricsList{}
 
 	resultRaw, err := GetHeapsterMetrics(cli, path, params)
 	if err != nil {
-		return []metricsapi.PodMetrics{}, err
+		return nil, err
 	}
 	if len(podName) == 0 {
-		metrics := metricsapi.PodMetricsList{}
-		err = json.Unmarshal(resultRaw, &metrics)
+		err = json.Unmarshal(resultRaw, &versionedMetrics)
 		if err != nil {
-			return []metricsapi.PodMetrics{}, fmt.Errorf("failed to unmarshall heapster response: %v", err)
+			return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err)
 		}
-		allMetrics = append(allMetrics, metrics.Items...)
 	} else {
-		var singleMetric metricsapi.PodMetrics
+		var singleMetric metricsv1alpha1api.PodMetrics
 		err = json.Unmarshal(resultRaw, &singleMetric)
 		if err != nil {
-			return []metricsapi.PodMetrics{}, fmt.Errorf("failed to unmarshall heapster response: %v", err)
+			return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err)
 		}
-		allMetrics = append(allMetrics, singleMetric)
+		versionedMetrics.Items = []metricsv1alpha1api.PodMetrics{singleMetric}
 	}
-	return allMetrics, nil
+	metrics := &metricsapi.PodMetricsList{}
+	err = metricsv1alpha1api.Convert_v1alpha1_PodMetricsList_To_metrics_PodMetricsList(&versionedMetrics, metrics, nil)
+	if err != nil {
+		return nil, err
+	}
+	return metrics, nil
 }
 
 func GetHeapsterMetrics(cli *HeapsterMetricsClient, path string, params map[string]string) ([]byte, error) {

pkg/kubectl/metricsutil/metrics_printer.go

@@ -25,7 +25,7 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	"k8s.io/kubernetes/pkg/printers"
-	metricsapi "k8s.io/metrics/pkg/apis/metrics/v1alpha1"
+	metricsapi "k8s.io/metrics/pkg/apis/metrics"
 )
 
 var (