Merge pull request #16621 from timstclair/metrics-lite

cmd/genconversion/conversion.go

@@ -31,6 +31,8 @@ import (
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/v1alpha1"
 	_ "k8s.io/kubernetes/pkg/apis/extensions"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	_ "k8s.io/kubernetes/pkg/apis/metrics"
+	_ "k8s.io/kubernetes/pkg/apis/metrics/v1alpha1"
 	kruntime "k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util/sets"
 

cmd/gendeepcopy/deep_copy.go

@@ -31,6 +31,8 @@ import (
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/v1alpha1"
 	_ "k8s.io/kubernetes/pkg/apis/extensions"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	_ "k8s.io/kubernetes/pkg/apis/metrics"
+	_ "k8s.io/kubernetes/pkg/apis/metrics/v1alpha1"
 	kruntime "k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util/sets"
 

cmd/kube-version-change/import_known_versions.go

@@ -21,4 +21,5 @@ import (
 	_ "k8s.io/kubernetes/pkg/api/install"
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/install"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
+	_ "k8s.io/kubernetes/pkg/apis/metrics/install"
 )

hack/after-build/update-generated-conversions.sh

@@ -43,7 +43,7 @@ EOF
 }
 
 # TODO(lavalamp): get this list by listing the pkg/apis/ directory?
-DEFAULT_GROUP_VERSIONS="v1 extensions/v1beta1 componentconfig/v1alpha1"
+DEFAULT_GROUP_VERSIONS="v1 extensions/v1beta1 componentconfig/v1alpha1 metrics/v1alpha1"
 VERSIONS=${VERSIONS:-$DEFAULT_GROUP_VERSIONS}
 for ver in $VERSIONS; do
   # Ensure that the version being processed is registered by setting

hack/after-build/update-generated-deep-copies.sh

@@ -49,7 +49,7 @@ function generate_deep_copies() {
   for ver in ${group_versions}; do
     # Ensure that the version being processed is registered by setting
     # KUBE_API_VERSIONS.
-    if [ -z ${ver##*/} ]; then 
+    if [ -z ${ver##*/} ]; then
         apiVersions=""
     fi
     KUBE_API_VERSIONS="${apiVersions}" generate_version "${ver}"
@@ -57,6 +57,6 @@ function generate_deep_copies() {
 }
 
 # v1 is in the group ""
-DEFAULT_VERSIONS="/ v1 extensions/ extensions/v1beta1 componentconfig/ componentconfig/v1alpha1"
+DEFAULT_VERSIONS="/ v1 extensions/ extensions/v1beta1 componentconfig/ componentconfig/v1alpha1 metrics/ metrics/v1alpha1"
 VERSIONS=${VERSIONS:-$DEFAULT_VERSIONS}
 generate_deep_copies "$VERSIONS"

hack/after-build/verify-generated-conversions.sh

@@ -23,7 +23,7 @@ source "${KUBE_ROOT}/hack/lib/init.sh"
 
 kube::golang::setup_env
 
-APIROOTS=${APIROOTS:-pkg/api pkg/apis/extensions}
+APIROOTS=${APIROOTS:-pkg/api pkg/apis/extensions pkg/apis/metrics}
 _tmp="${KUBE_ROOT}/_tmp"
 
 cleanup() {

hack/after-build/verify-generated-deep-copies.sh

@@ -25,7 +25,7 @@ kube::golang::setup_env
 
 gendeepcopy=$(kube::util::find-binary "gendeepcopy")
 
-APIROOTS=${APIROOTS:-pkg/api pkg/apis/extensions}
+APIROOTS=${APIROOTS:-pkg/api pkg/apis/extensions pkg/apis/metrics}
 _tmp="${KUBE_ROOT}/_tmp"
 
 cleanup() {

hack/test-go.sh

@@ -56,9 +56,7 @@ KUBE_GOVERALLS_BIN=${KUBE_GOVERALLS_BIN:-}
 # Lists of API Versions of each groups that should be tested, groups are
 # separated by comma, lists are separated by semicolon. e.g.,
 # "v1,compute/v1alpha1,experimental/v1alpha2;v1,compute/v2,experimental/v1alpha3"
-# TODO: It's going to be:
-# KUBE_TEST_API_VERSIONS=${KUBE_TEST_API_VERSIONS:-"v1,extensions/v1beta1"}
-KUBE_TEST_API_VERSIONS=${KUBE_TEST_API_VERSIONS:-"v1,extensions/v1beta1"}
+KUBE_TEST_API_VERSIONS=${KUBE_TEST_API_VERSIONS:-"v1,extensions/v1beta1,metrics/v1alpha1"}
 # once we have multiple group supports
 # Run tests with the standard (registry) and a custom etcd prefix
 # (kubernetes.io/registry).
@@ -315,7 +313,7 @@ for (( i=0, j=0; ; )); do
   # KUBE_TEST_API sets the version of each group to be tested. KUBE_API_VERSIONS
   # register the groups/versions as supported by k8s. So KUBE_API_VERSIONS
   # needs to be the superset of KUBE_TEST_API.
-  KUBE_TEST_API="${apiVersion}" KUBE_API_VERSIONS="v1,extensions/v1beta1,componentconfig/v1alpha1" ETCD_PREFIX=${etcdPrefix} runTests "$@"
+  KUBE_TEST_API="${apiVersion}" KUBE_API_VERSIONS="v1,extensions/v1beta1,componentconfig/v1alpha1,metrics/v1alpha1" ETCD_PREFIX=${etcdPrefix} runTests "$@"
   i=${i}+1
   j=${j}+1
   if [[ i -eq ${apiVersionsCount} ]] && [[ j -eq ${etcdPrefixesCount} ]]; then

pkg/api/registered/registered.go

@@ -35,6 +35,7 @@ func init() {
 		"v1":                       true,
 		"extensions/v1beta1":       true,
 		"componentconfig/v1alpha1": true,
+		"metrics/v1alpha1":         true,
 	}
 
 	// The default list of supported api versions, in order of most preferred to the least.

pkg/api/testapi/testapi.go

@@ -25,6 +25,7 @@ import (
 	"k8s.io/kubernetes/pkg/api"
 	_ "k8s.io/kubernetes/pkg/api/install"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
+	_ "k8s.io/kubernetes/pkg/apis/metrics/install"
 
 	"k8s.io/kubernetes/pkg/api/latest"
 	"k8s.io/kubernetes/pkg/api/meta"
@@ -90,21 +91,11 @@ func (g TestGroup) GroupAndVersion() string {
 // KUBE_TEST_API env var.
 func (g TestGroup) Codec() runtime.Codec {
 	// TODO: caesarxuchao: Restructure the body once we have a central `latest`.
-	if g.Group == "" {
-		interfaces, err := latest.GroupOrDie("").InterfacesFor(g.GroupVersionUnderTest)
-		if err != nil {
-			panic(err)
-		}
-		return interfaces.Codec
-	}
-	if g.Group == "extensions" {
-		interfaces, err := latest.GroupOrDie("extensions").InterfacesFor(g.GroupVersionUnderTest)
-		if err != nil {
-			panic(err)
-		}
-		return interfaces.Codec
+	interfaces, err := latest.GroupOrDie(g.Group).InterfacesFor(g.GroupVersionUnderTest)
+	if err != nil {
+		panic(err)
 	}
-	panic(fmt.Errorf("cannot test group %s", g.Group))
+	return interfaces.Codec
 }
 
 // Converter returns the api.Scheme for the API version to test against, as set by the

pkg/apis/metrics/deep_copy_generated.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// DO NOT EDIT. THIS FILE IS AUTO-GENERATED BY $KUBEROOT/hack/update-generated-deep-copies.sh.
+
+package metrics
+
+import (
+	api "k8s.io/kubernetes/pkg/api"
+	unversioned "k8s.io/kubernetes/pkg/api/unversioned"
+	conversion "k8s.io/kubernetes/pkg/conversion"
+)
+
+func deepCopy_unversioned_TypeMeta(in unversioned.TypeMeta, out *unversioned.TypeMeta, c *conversion.Cloner) error {
+	out.Kind = in.Kind
+	out.APIVersion = in.APIVersion
+	return nil
+}
+
+func deepCopy_metrics_RawNode(in RawNode, out *RawNode, c *conversion.Cloner) error {
+	if err := deepCopy_unversioned_TypeMeta(in.TypeMeta, &out.TypeMeta, c); err != nil {
+		return err
+	}
+	return nil
+}
+
+func deepCopy_metrics_RawPod(in RawPod, out *RawPod, c *conversion.Cloner) error {
+	if err := deepCopy_unversioned_TypeMeta(in.TypeMeta, &out.TypeMeta, c); err != nil {
+		return err
+	}
+	return nil
+}
+
+func init() {
+	err := api.Scheme.AddGeneratedDeepCopyFuncs(
+		deepCopy_unversioned_TypeMeta,
+		deepCopy_metrics_RawNode,
+		deepCopy_metrics_RawPod,
+	)
+	if err != nil {
+		// if one of the deep copy functions is malformed, detect it immediately.
+		panic(err)
+	}
+}

pkg/apis/metrics/install/install.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package install installs the metrics API group, making it available as
+// an option to all of the API encoding/decoding machinery.
+package install
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/latest"
+	"k8s.io/kubernetes/pkg/api/meta"
+	"k8s.io/kubernetes/pkg/api/registered"
+	apiutil "k8s.io/kubernetes/pkg/api/util"
+	_ "k8s.io/kubernetes/pkg/apis/metrics"
+	"k8s.io/kubernetes/pkg/apis/metrics/v1alpha1"
+	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/util/sets"
+)
+
+const importPrefix = "k8s.io/kubernetes/pkg/apis/metrics"
+
+var accessor = meta.NewAccessor()
+
+func init() {
+	groupMeta, err := latest.RegisterGroup("metrics")
+	if err != nil {
+		glog.V(4).Infof("%v", err)
+		return
+	}
+	registeredGroupVersions := registered.GroupVersionsForGroup("metrics")
+	groupVersion := registeredGroupVersions[0]
+	*groupMeta = latest.GroupMeta{
+		GroupVersion: groupVersion,
+		Group:        apiutil.GetGroup(groupVersion),
+		Version:      apiutil.GetVersion(groupVersion),
+		Codec:        runtime.CodecFor(api.Scheme, groupVersion),
+	}
+	var versions []string
+	var groupVersions []string
+	for i := len(registeredGroupVersions) - 1; i >= 0; i-- {
+		versions = append(versions, apiutil.GetVersion(registeredGroupVersions[i]))
+		groupVersions = append(groupVersions, registeredGroupVersions[i])
+	}
+	groupMeta.Versions = versions
+	groupMeta.GroupVersions = groupVersions
+
+	groupMeta.SelfLinker = runtime.SelfLinker(accessor)
+
+	// the list of kinds that are scoped at the root of the api hierarchy
+	// if a kind is not enumerated here, it is assumed to have a namespace scope
+	rootScoped := sets.NewString()
+
+	ignoredKinds := sets.NewString()
+
+	groupMeta.RESTMapper = api.NewDefaultRESTMapper("metrics", groupVersions, interfacesFor, importPrefix, ignoredKinds, rootScoped)
+	api.RegisterRESTMapper(groupMeta.RESTMapper)
+	groupMeta.InterfacesFor = interfacesFor
+}
+
+// InterfacesFor returns the default Codec and ResourceVersioner for a given version
+// string, or an error if the version is not known.
+func interfacesFor(version string) (*meta.VersionInterfaces, error) {
+	switch version {
+	case "metrics/v1alpha1":
+		return &meta.VersionInterfaces{
+			Codec:            v1alpha1.Codec,
+			ObjectConvertor:  api.Scheme,
+			MetadataAccessor: accessor,
+		}, nil
+	default:
+		g, _ := latest.Group("metrics")
+		return nil, fmt.Errorf("unsupported storage version: %s (valid: %s)", version, strings.Join(g.Versions, ", "))
+	}
+}

pkg/apis/metrics/register.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package metrics
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+)
+
+func init() {
+	// Register the API.
+	addKnownTypes()
+}
+
+// Adds the list of known types to api.Scheme.
+func addKnownTypes() {
+	api.Scheme.AddKnownTypes("",
+		&RawNode{},
+		&RawPod{},
+	)
+}
+
+func (*RawNode) IsAnAPIObject() {}
+func (*RawPod) IsAnAPIObject()  {}

pkg/apis/metrics/types.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package metrics
+
+import "k8s.io/kubernetes/pkg/api/unversioned"
+
+// Placeholder top-level node resource metrics.
+type RawNode struct {
+	unversioned.TypeMeta `json:",inline"`
+}
+
+// Placeholder top-level pod resource metrics.
+type RawPod struct {
+	unversioned.TypeMeta `json:",inline"`
+}

pkg/apis/metrics/v1alpha1/conversion_generated.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// DO NOT EDIT. THIS FILE IS AUTO-GENERATED BY $KUBEROOT/hack/update-generated-conversions.sh
+
+package v1alpha1
+
+import (
+	reflect "reflect"
+
+	api "k8s.io/kubernetes/pkg/api"
+	metrics "k8s.io/kubernetes/pkg/apis/metrics"
+	conversion "k8s.io/kubernetes/pkg/conversion"
+)
+
+func autoconvert_metrics_RawNode_To_v1alpha1_RawNode(in *metrics.RawNode, out *RawNode, s conversion.Scope) error {
+	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
+		defaulting.(func(*metrics.RawNode))(in)
+	}
+	if err := s.Convert(&in.TypeMeta, &out.TypeMeta, 0); err != nil {
+		return err
+	}
+	return nil
+}
+
+func convert_metrics_RawNode_To_v1alpha1_RawNode(in *metrics.RawNode, out *RawNode, s conversion.Scope) error {
+	return autoconvert_metrics_RawNode_To_v1alpha1_RawNode(in, out, s)
+}
+
+func autoconvert_metrics_RawPod_To_v1alpha1_RawPod(in *metrics.RawPod, out *RawPod, s conversion.Scope) error {
+	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
+		defaulting.(func(*metrics.RawPod))(in)
+	}
+	if err := s.Convert(&in.TypeMeta, &out.TypeMeta, 0); err != nil {
+		return err
+	}
+	return nil
+}
+
+func convert_metrics_RawPod_To_v1alpha1_RawPod(in *metrics.RawPod, out *RawPod, s conversion.Scope) error {
+	return autoconvert_metrics_RawPod_To_v1alpha1_RawPod(in, out, s)
+}
+
+func autoconvert_v1alpha1_RawNode_To_metrics_RawNode(in *RawNode, out *metrics.RawNode, s conversion.Scope) error {
+	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
+		defaulting.(func(*RawNode))(in)
+	}
+	if err := s.Convert(&in.TypeMeta, &out.TypeMeta, 0); err != nil {
+		return err
+	}
+	return nil
+}
+
+func convert_v1alpha1_RawNode_To_metrics_RawNode(in *RawNode, out *metrics.RawNode, s conversion.Scope) error {
+	return autoconvert_v1alpha1_RawNode_To_metrics_RawNode(in, out, s)
+}
+
+func autoconvert_v1alpha1_RawPod_To_metrics_RawPod(in *RawPod, out *metrics.RawPod, s conversion.Scope) error {
+	if defaulting, found := s.DefaultingInterface(reflect.TypeOf(*in)); found {
+		defaulting.(func(*RawPod))(in)
+	}
+	if err := s.Convert(&in.TypeMeta, &out.TypeMeta, 0); err != nil {
+		return err
+	}
+	return nil
+}
+
+func convert_v1alpha1_RawPod_To_metrics_RawPod(in *RawPod, out *metrics.RawPod, s conversion.Scope) error {
+	return autoconvert_v1alpha1_RawPod_To_metrics_RawPod(in, out, s)
+}
+
+func init() {
+	err := api.Scheme.AddGeneratedConversionFuncs(
+		autoconvert_metrics_RawNode_To_v1alpha1_RawNode,
+		autoconvert_metrics_RawPod_To_v1alpha1_RawPod,
+		autoconvert_v1alpha1_RawNode_To_metrics_RawNode,
+		autoconvert_v1alpha1_RawPod_To_metrics_RawPod,
+	)
+	if err != nil {
+		// If one of the conversion functions is malformed, detect it immediately.
+		panic(err)
+	}
+}

pkg/apis/metrics/v1alpha1/deep_copy_generated.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// DO NOT EDIT. THIS FILE IS AUTO-GENERATED BY $KUBEROOT/hack/update-generated-deep-copies.sh.
+
+package v1alpha1
+
+import (
+	api "k8s.io/kubernetes/pkg/api"
+	unversioned "k8s.io/kubernetes/pkg/api/unversioned"
+	conversion "k8s.io/kubernetes/pkg/conversion"
+)
+
+func deepCopy_unversioned_TypeMeta(in unversioned.TypeMeta, out *unversioned.TypeMeta, c *conversion.Cloner) error {
+	out.Kind = in.Kind
+	out.APIVersion = in.APIVersion
+	return nil
+}
+
+func deepCopy_v1alpha1_RawNode(in RawNode, out *RawNode, c *conversion.Cloner) error {
+	if err := deepCopy_unversioned_TypeMeta(in.TypeMeta, &out.TypeMeta, c); err != nil {
+		return err
+	}
+	return nil
+}
+
+func deepCopy_v1alpha1_RawPod(in RawPod, out *RawPod, c *conversion.Cloner) error {
+	if err := deepCopy_unversioned_TypeMeta(in.TypeMeta, &out.TypeMeta, c); err != nil {
+		return err
+	}
+	return nil
+}
+
+func init() {
+	err := api.Scheme.AddGeneratedDeepCopyFuncs(
+		deepCopy_unversioned_TypeMeta,
+		deepCopy_v1alpha1_RawNode,
+		deepCopy_v1alpha1_RawPod,
+	)
+	if err != nil {
+		// if one of the deep copy functions is malformed, detect it immediately.
+		panic(err)
+	}
+}

pkg/apis/metrics/v1alpha1/register.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+var Codec = runtime.CodecFor(api.Scheme, "metrics/v1alpha1")
+
+func init() {
+	// Register the API.
+	addKnownTypes()
+}
+
+// Adds the list of known types to api.Scheme.
+func addKnownTypes() {
+	api.Scheme.AddKnownTypes("metrics/v1alpha1",
+		&RawNode{},
+		&RawPod{},
+	)
+}
+
+func (*RawNode) IsAnAPIObject() {}
+func (*RawPod) IsAnAPIObject()  {}

pkg/apis/metrics/v1alpha1/types.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import "k8s.io/kubernetes/pkg/api/unversioned"
+
+// Placeholder top-level node resource metrics.
+type RawNode struct {
+	unversioned.TypeMeta `json:",inline"`
+}
+
+// Placeholder top-level pod resource metrics.
+type RawPod struct {
+	unversioned.TypeMeta `json:",inline"`
+}

pkg/client/unversioned/import_known_versions.go

@@ -21,4 +21,5 @@ import (
 	_ "k8s.io/kubernetes/pkg/api/install"
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/install"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
+	_ "k8s.io/kubernetes/pkg/apis/metrics/install"
 )