Created autoscaling API group and copied HPA there

cmd/genconversion/conversion.go

@@ -27,6 +27,7 @@ import (
 	"k8s.io/kubernetes/pkg/api"
 	_ "k8s.io/kubernetes/pkg/api/install"
 	"k8s.io/kubernetes/pkg/api/unversioned"
+	_ "k8s.io/kubernetes/pkg/apis/autoscaling/install"
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/install"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
 	_ "k8s.io/kubernetes/pkg/apis/metrics/install"

cmd/gendeepcopy/deep_copy.go

@@ -28,6 +28,7 @@ import (
 	"k8s.io/kubernetes/pkg/api"
 	_ "k8s.io/kubernetes/pkg/api/install"
 	"k8s.io/kubernetes/pkg/api/unversioned"
+	_ "k8s.io/kubernetes/pkg/apis/autoscaling/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 authorization/v1beta1 extensions/v1beta1 componentconfig/v1alpha1 metrics/v1alpha1"
+DEFAULT_GROUP_VERSIONS="v1 authorization/v1beta1 autoscaling/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

@@ -62,6 +62,6 @@ function generate_deep_copies() {
 # Currently pkg/api/deep_copy_generated.go is generated by the new go2idl generator.
 # All others (mentioned above) are still generated by the old reflection-based generator.
 # TODO: Migrate these to the new generator.
-DEFAULT_VERSIONS="v1 authorization/__internal authorization/v1beta1 extensions/__internal extensions/v1beta1 componentconfig/__internal componentconfig/v1alpha1 metrics/__internal metrics/v1alpha1"
+DEFAULT_VERSIONS="v1 authorization/__internal authorization/v1beta1 autoscaling/__internal autoscaling/v1 extensions/__internal extensions/v1beta1 componentconfig/__internal componentconfig/v1alpha1 metrics/__internal metrics/v1alpha1"
 VERSIONS=${VERSIONS:-$DEFAULT_VERSIONS}
 generate_deep_copies "$VERSIONS"

hack/after-build/update-swagger-spec.sh

@@ -50,7 +50,7 @@ kube::etcd::start
 
 # Start kube-apiserver
 kube::log::status "Starting kube-apiserver"
-KUBE_API_VERSIONS="v1,extensions/v1beta1" "${KUBE_OUTPUT_HOSTBIN}/kube-apiserver" \
+KUBE_API_VERSIONS="v1,autoscaling/v1,extensions/v1beta1" "${KUBE_OUTPUT_HOSTBIN}/kube-apiserver" \
   --address="127.0.0.1" \
   --public-address-override="127.0.0.1" \
   --port="${API_PORT}" \
@@ -64,7 +64,7 @@ APISERVER_PID=$!
 kube::util::wait_for_url "http://127.0.0.1:${API_PORT}/healthz" "apiserver: "
 
 SWAGGER_API_PATH="http://127.0.0.1:${API_PORT}/swaggerapi/"
-DEFAULT_GROUP_VERSIONS="v1 extensions/v1beta1"
+DEFAULT_GROUP_VERSIONS="v1 autoscaling/v1 extensions/v1beta1"
 VERSIONS=${VERSIONS:-$DEFAULT_GROUP_VERSIONS}
 
 kube::log::status "Updating " ${SWAGGER_ROOT_DIR}

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

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

hack/update-generated-swagger-docs.sh

@@ -56,7 +56,7 @@ EOF
   mv "$TMPFILE" "pkg/$(kube::util::group-version-to-pkg-path "${group_version}")/types_swagger_doc_generated.go"
 }
 
-GROUP_VERSIONS=(unversioned v1 authorization/v1beta1 extensions/v1beta1)
+GROUP_VERSIONS=(unversioned v1 authorization/v1beta1 autoscaling/v1 extensions/v1beta1)
 # To avoid compile errors, remove the currently existing files.
 for group_version in "${GROUP_VERSIONS[@]}"; do
   rm -f "pkg/$(kube::util::group-version-to-pkg-path "${group_version}")/types_swagger_doc_generated.go"

pkg/apis/autoscaling/install/install.go

@@ -0,0 +1,129 @@
+/*
+Copyright 2016 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 experimental API group, making it available as
+// an option to all of the API encoding/decoding machinery.
+package install
+
+import (
+	"fmt"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/meta"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/apimachinery"
+	"k8s.io/kubernetes/pkg/apimachinery/registered"
+	"k8s.io/kubernetes/pkg/apis/autoscaling"
+	"k8s.io/kubernetes/pkg/apis/autoscaling/v1"
+	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/util/sets"
+)
+
+const importPrefix = "k8s.io/kubernetes/pkg/apis/autoscaling"
+
+var accessor = meta.NewAccessor()
+
+// availableVersions lists all known external versions for this group from most preferred to least preferred
+var availableVersions = []unversioned.GroupVersion{v1.SchemeGroupVersion}
+
+func init() {
+	registered.RegisterVersions(availableVersions)
+	externalVersions := []unversioned.GroupVersion{}
+	for _, v := range availableVersions {
+		if registered.IsAllowedVersion(v) {
+			externalVersions = append(externalVersions, v)
+		}
+	}
+	if len(externalVersions) == 0 {
+		glog.V(4).Infof("No version is registered for group %v", autoscaling.GroupName)
+		return
+	}
+
+	if err := registered.EnableVersions(externalVersions...); err != nil {
+		glog.V(4).Infof("%v", err)
+		return
+	}
+	if err := enableVersions(externalVersions); err != nil {
+		glog.V(4).Infof("%v", err)
+		return
+	}
+}
+
+// TODO: enableVersions should be centralized rather than spread in each API
+// group.
+// We can combine registered.RegisterVersions, registered.EnableVersions and
+// registered.RegisterGroup once we have moved enableVersions there.
+func enableVersions(externalVersions []unversioned.GroupVersion) error {
+	addVersionsToScheme(externalVersions...)
+	preferredExternalVersion := externalVersions[0]
+
+	groupMeta := apimachinery.GroupMeta{
+		GroupVersion:  preferredExternalVersion,
+		GroupVersions: externalVersions,
+		RESTMapper:    newRESTMapper(externalVersions),
+		SelfLinker:    runtime.SelfLinker(accessor),
+		InterfacesFor: interfacesFor,
+	}
+
+	if err := registered.RegisterGroup(groupMeta); err != nil {
+		return err
+	}
+	api.RegisterRESTMapper(groupMeta.RESTMapper)
+	return nil
+}
+
+func newRESTMapper(externalVersions []unversioned.GroupVersion) meta.RESTMapper {
+	// 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()
+
+	return api.NewDefaultRESTMapper(externalVersions, interfacesFor, importPrefix, ignoredKinds, rootScoped)
+}
+
+// interfacesFor returns the default Codec and ResourceVersioner for a given version
+// string, or an error if the version is not known.
+func interfacesFor(version unversioned.GroupVersion) (*meta.VersionInterfaces, error) {
+	switch version {
+	case v1.SchemeGroupVersion:
+		return &meta.VersionInterfaces{
+			ObjectConvertor:  api.Scheme,
+			MetadataAccessor: accessor,
+		}, nil
+	default:
+		g, _ := registered.Group(autoscaling.GroupName)
+		return nil, fmt.Errorf("unsupported storage version: %s (valid: %v)", version, g.GroupVersions)
+	}
+}
+
+func addVersionsToScheme(externalVersions ...unversioned.GroupVersion) {
+	// add the internal version to Scheme
+	autoscaling.AddToScheme(api.Scheme)
+	// add the enabled external versions to Scheme
+	for _, v := range externalVersions {
+		if !registered.IsEnabledVersion(v) {
+			glog.Errorf("Version %s is not enabled, so it will not be added to the Scheme.", v)
+			continue
+		}
+		switch v {
+		case v1.SchemeGroupVersion:
+			v1.AddToScheme(api.Scheme)
+		}
+	}
+}

pkg/apis/autoscaling/register.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2016 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 autoscaling
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/apis/extensions"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// GroupName is the group name use in this package
+const GroupName = "autoscaling"
+
+// SchemeGroupVersion is group version used to register these objects
+var SchemeGroupVersion = unversioned.GroupVersion{Group: GroupName, Version: runtime.APIVersionInternal}
+
+// Kind takes an unqualified kind and returns back a Group qualified GroupKind
+func Kind(kind string) unversioned.GroupKind {
+	return SchemeGroupVersion.WithKind(kind).GroupKind()
+}
+
+// Resource takes an unqualified resource and returns back a Group qualified GroupResource
+func Resource(resource string) unversioned.GroupResource {
+	return SchemeGroupVersion.WithResource(resource).GroupResource()
+}
+
+func AddToScheme(scheme *runtime.Scheme) {
+	// Add the API to Scheme.
+	addKnownTypes(scheme)
+}
+
+// Adds the list of known types to api.Scheme.
+func addKnownTypes(scheme *runtime.Scheme) {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&extensions.HorizontalPodAutoscaler{},
+		&extensions.HorizontalPodAutoscalerList{},
+		&api.ListOptions{},
+	)
+}

pkg/apis/autoscaling/v1/defaults.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2016 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 v1
+
+import (
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+func addDefaultingFuncs(scheme *runtime.Scheme) {
+	scheme.AddDefaultingFuncs(
+		func(obj *HorizontalPodAutoscaler) {
+			if obj.Spec.MinReplicas == nil {
+				minReplicas := int32(1)
+				obj.Spec.MinReplicas = &minReplicas
+			}
+			if obj.Spec.CPUUtilization == nil {
+				obj.Spec.CPUUtilization = &CPUTargetUtilization{TargetPercentage: 80}
+			}
+		},
+	)
+}

pkg/apis/autoscaling/v1/register.go

@@ -0,0 +1,46 @@
+/*
+Copyright 2016 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 v1
+
+import (
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/api/v1"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// GroupName is the group name use in this package
+const GroupName = "autoscaling"
+
+// SchemeGroupVersion is group version used to register these objects
+var SchemeGroupVersion = unversioned.GroupVersion{Group: GroupName, Version: "v1"}
+
+func AddToScheme(scheme *runtime.Scheme) {
+	addKnownTypes(scheme)
+	addDefaultingFuncs(scheme)
+}
+
+// Adds the list of known types to api.Scheme.
+func addKnownTypes(scheme *runtime.Scheme) {
+	scheme.AddKnownTypes(SchemeGroupVersion,
+		&HorizontalPodAutoscaler{},
+		&HorizontalPodAutoscalerList{},
+		&v1.ListOptions{},
+	)
+}
+
+func (obj *HorizontalPodAutoscaler) GetObjectKind() unversioned.ObjectKind     { return &obj.TypeMeta }
+func (obj *HorizontalPodAutoscalerList) GetObjectKind() unversioned.ObjectKind { return &obj.TypeMeta }

pkg/apis/autoscaling/v1/types.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2016 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 v1
+
+import (
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/api/v1"
+)
+
+// SubresourceReference contains enough information to let you inspect or modify the referred subresource.
+type SubresourceReference struct {
+	// Kind of the referent; More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#types-kinds"
+	Kind string `json:"kind,omitempty"`
+	// Name of the referent; More info: http://releases.k8s.io/HEAD/docs/user-guide/identifiers.md#names
+	Name string `json:"name,omitempty"`
+	// API version of the referent
+	APIVersion string `json:"apiVersion,omitempty"`
+	// Subresource name of the referent
+	Subresource string `json:"subresource,omitempty"`
+}
+
+type CPUTargetUtilization struct {
+	// fraction of the requested CPU that should be utilized/used,
+	// e.g. 70 means that 70% of the requested CPU should be in use.
+	TargetPercentage int32 `json:"targetPercentage"`
+}
+
+// specification of a horizontal pod autoscaler.
+type HorizontalPodAutoscalerSpec struct {
+	// reference to Scale subresource; horizontal pod autoscaler will learn the current resource consumption from its status,
+	// and will set the desired number of pods by modifying its spec.
+	ScaleRef SubresourceReference `json:"scaleRef"`
+	// lower limit for the number of pods that can be set by the autoscaler, default 1.
+	MinReplicas *int32 `json:"minReplicas,omitempty"`
+	// upper limit for the number of pods that can be set by the autoscaler; cannot be smaller than MinReplicas.
+	MaxReplicas int32 `json:"maxReplicas"`
+	// target average CPU utilization (represented as a percentage of requested CPU) over all the pods;
+	// if not specified it defaults to the target CPU utilization at 80% of the requested resources.
+	CPUUtilization *CPUTargetUtilization `json:"cpuUtilization,omitempty"`
+}
+
+// current status of a horizontal pod autoscaler
+type HorizontalPodAutoscalerStatus struct {
+	// most recent generation observed by this autoscaler.
+	ObservedGeneration *int64 `json:"observedGeneration,omitempty"`
+
+	// last time the HorizontalPodAutoscaler scaled the number of pods;
+	// used by the autoscaler to control how often the number of pods is changed.
+	LastScaleTime *unversioned.Time `json:"lastScaleTime,omitempty"`
+
+	// current number of replicas of pods managed by this autoscaler.
+	CurrentReplicas int32 `json:"currentReplicas"`
+
+	// desired number of replicas of pods managed by this autoscaler.
+	DesiredReplicas int32 `json:"desiredReplicas"`
+
+	// current average CPU utilization over all pods, represented as a percentage of requested CPU,
+	// e.g. 70 means that an average pod is using now 70% of its requested CPU.
+	CurrentCPUUtilizationPercentage *int32 `json:"currentCPUUtilizationPercentage,omitempty"`
+}
+
+// configuration of a horizontal pod autoscaler.
+type HorizontalPodAutoscaler struct {
+	unversioned.TypeMeta `json:",inline"`
+	// Standard object metadata. More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#metadata
+	v1.ObjectMeta `json:"metadata,omitempty"`
+
+	// behaviour of autoscaler. More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#spec-and-status.
+	Spec HorizontalPodAutoscalerSpec `json:"spec,omitempty"`
+
+	// current information about the autoscaler.
+	Status HorizontalPodAutoscalerStatus `json:"status,omitempty"`
+}
+
+// list of horizontal pod autoscaler objects.
+type HorizontalPodAutoscalerList struct {
+	unversioned.TypeMeta `json:",inline"`
+	// Standard list metadata.
+	unversioned.ListMeta `json:"metadata,omitempty"`
+
+	// list of horizontal pod autoscaler objects.
+	Items []HorizontalPodAutoscaler `json:"items"`
+}

pkg/client/unversioned/import_known_versions.go

@@ -23,6 +23,7 @@ import (
 	_ "k8s.io/kubernetes/pkg/api/install"
 	"k8s.io/kubernetes/pkg/apimachinery/registered"
 	_ "k8s.io/kubernetes/pkg/apis/authorization/install"
+	_ "k8s.io/kubernetes/pkg/apis/autoscaling/install"
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/install"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
 	_ "k8s.io/kubernetes/pkg/apis/metrics/install"

pkg/master/import_known_versions.go

@@ -23,6 +23,7 @@ import (
 	_ "k8s.io/kubernetes/pkg/api/install"
 	"k8s.io/kubernetes/pkg/apimachinery/registered"
 	_ "k8s.io/kubernetes/pkg/apis/authorization/install"
+	_ "k8s.io/kubernetes/pkg/apis/autoscaling/install"
 	_ "k8s.io/kubernetes/pkg/apis/componentconfig/install"
 	_ "k8s.io/kubernetes/pkg/apis/extensions/install"
 )