Experimental client for horizontal pod autoscaler.

Implementation of experimental client for horizontal pod autoscaler. Placeholder implementation for controller for horizontal pod autoscaler.

cmd/kube-controller-manager/app/controllermanager.go

@@ -51,6 +51,9 @@ import (
 	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/spf13/pflag"
+
+	// TODO: Enable the code belowe when horizontal pod autoscaler controller is implemented.
+	// "k8s.io/kubernetes/pkg/controller/autoscaler"
 )
 
 // CMServer is the main context object for the controller manager.
@@ -264,5 +267,13 @@ func (s *CMServer) Run(_ []string) error {
 		serviceaccount.DefaultServiceAccountsControllerOptions(),
 	).Run()
 
+	// TODO: Enable the code belowe when horizontal pod autoscaler controller is implemented.
+	// expClient, err := client.NewExperimental(kubeconfig)
+	// if err != nil {
+	// 	glog.Fatalf("Invalid API configuration: %v", err)
+	// }
+	// horizontalPodAutoscalerController := autoscalercontroller.New(expClient)
+	// horizontalPodAutoscalerController.Run(s.NodeSyncPeriod)
+
 	select {}
 }

pkg/client/unversioned/client_test.go

@@ -54,6 +54,7 @@ type Response struct {
 
 type testClient struct {
 	*Client
+	*ExperimentalClient
 	Request  testRequest
 	Response Response
 	Error    bool
@@ -86,6 +87,16 @@ func (c *testClient) Setup() *testClient {
 			Version: version,
 		})
 	}
+	if c.ExperimentalClient == nil {
+		version := c.Version
+		if len(version) == 0 {
+			version = testapi.Version()
+		}
+		c.ExperimentalClient = NewExperimentalOrDie(&Config{
+			Host:    c.server.URL,
+			Version: version,
+		})
+	}
 	c.QueryValidator = map[string]func(string, string) bool{}
 	return c
 }

pkg/client/unversioned/experimental.go

@@ -32,6 +32,7 @@ import (
 // incompatible ways at any time.
 type ExperimentalInterface interface {
 	VersionInterface
+	HorizontalPodAutoscalersNamespacer
 }
 
 // ExperimentalClient is used to interact with experimental Kubernetes features.
@@ -70,6 +71,10 @@ func (c *ExperimentalClient) ServerAPIVersions() (*api.APIVersions, error) {
 	return &v, nil
 }
 
+func (c *ExperimentalClient) HorizontalPodAutoscalers(namespace string) HorizontalPodAutoscalerInterface {
+	return newHorizontalPodAutoscalers(c, namespace)
+}
+
 // NewExperimental creates a new ExperimentalClient for the given config. This client
 // provides access to experimental Kubernetes features.
 // Experimental features are not supported and may be changed or removed in

pkg/client/unversioned/horizontalpodautoscaler.go

@@ -0,0 +1,107 @@
+/*
+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 unversioned
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/expapi"
+	"k8s.io/kubernetes/pkg/fields"
+	"k8s.io/kubernetes/pkg/labels"
+	"k8s.io/kubernetes/pkg/watch"
+)
+
+// HorizontalPodAutoscalersNamespacer has methods to work with HorizontalPodAutoscaler resources in a namespace
+type HorizontalPodAutoscalersNamespacer interface {
+	HorizontalPodAutoscalers(namespace string) HorizontalPodAutoscalerInterface
+}
+
+// HorizontalPodAutoscalerInterface has methods to work with HorizontalPodAutoscaler resources.
+type HorizontalPodAutoscalerInterface interface {
+	List(label labels.Selector, field fields.Selector) (*expapi.HorizontalPodAutoscalerList, error)
+	Get(name string) (*expapi.HorizontalPodAutoscaler, error)
+	Delete(name string, options *api.DeleteOptions) error
+	Create(horizontalPodAutoscaler *expapi.HorizontalPodAutoscaler) (*expapi.HorizontalPodAutoscaler, error)
+	Update(horizontalPodAutoscaler *expapi.HorizontalPodAutoscaler) (*expapi.HorizontalPodAutoscaler, error)
+	Watch(label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error)
+}
+
+// horizontalPodAutoscalers implements HorizontalPodAutoscalersNamespacer interface
+type horizontalPodAutoscalers struct {
+	client *ExperimentalClient
+	ns     string
+}
+
+// newHorizontalPodAutoscalers returns a horizontalPodAutoscalers
+func newHorizontalPodAutoscalers(c *ExperimentalClient, namespace string) *horizontalPodAutoscalers {
+	return &horizontalPodAutoscalers{
+		client: c,
+		ns:     namespace,
+	}
+}
+
+// List takes label and field selectors, and returns the list of horizontalPodAutoscalers that match those selectors.
+func (c *horizontalPodAutoscalers) List(label labels.Selector, field fields.Selector) (result *expapi.HorizontalPodAutoscalerList, err error) {
+	result = &expapi.HorizontalPodAutoscalerList{}
+	err = c.client.Get().Namespace(c.ns).Resource("horizontalPodAutoscalers").LabelsSelectorParam(label).FieldsSelectorParam(field).Do().Into(result)
+	return
+}
+
+// Get takes the name of the horizontalPodAutoscaler, and returns the corresponding HorizontalPodAutoscaler object, and an error if it occurs
+func (c *horizontalPodAutoscalers) Get(name string) (result *expapi.HorizontalPodAutoscaler, err error) {
+	result = &expapi.HorizontalPodAutoscaler{}
+	err = c.client.Get().Namespace(c.ns).Resource("horizontalPodAutoscalers").Name(name).Do().Into(result)
+	return
+}
+
+// Delete takes the name of the horizontalPodAutoscaler and deletes it.  Returns an error if one occurs.
+func (c *horizontalPodAutoscalers) Delete(name string, options *api.DeleteOptions) error {
+	// TODO: to make this reusable in other client libraries
+	if options == nil {
+		return c.client.Delete().Namespace(c.ns).Resource("horizontalPodAutoscalers").Name(name).Do().Error()
+	}
+	body, err := api.Scheme.EncodeToVersion(options, c.client.APIVersion())
+	if err != nil {
+		return err
+	}
+	return c.client.Delete().Namespace(c.ns).Resource("horizontalPodAutoscalers").Name(name).Body(body).Do().Error()
+}
+
+// Create takes the representation of a horizontalPodAutoscaler and creates it.  Returns the server's representation of the horizontalPodAutoscaler, and an error, if it occurs.
+func (c *horizontalPodAutoscalers) Create(horizontalPodAutoscaler *expapi.HorizontalPodAutoscaler) (result *expapi.HorizontalPodAutoscaler, err error) {
+	result = &expapi.HorizontalPodAutoscaler{}
+	err = c.client.Post().Namespace(c.ns).Resource("horizontalPodAutoscalers").Body(horizontalPodAutoscaler).Do().Into(result)
+	return
+}
+
+// Update takes the representation of a horizontalPodAutoscaler and updates it.  Returns the server's representation of the horizontalPodAutoscaler, and an error, if it occurs.
+func (c *horizontalPodAutoscalers) Update(horizontalPodAutoscaler *expapi.HorizontalPodAutoscaler) (result *expapi.HorizontalPodAutoscaler, err error) {
+	result = &expapi.HorizontalPodAutoscaler{}
+	err = c.client.Put().Namespace(c.ns).Resource("horizontalPodAutoscalers").Name(horizontalPodAutoscaler.Name).Body(horizontalPodAutoscaler).Do().Into(result)
+	return
+}
+
+// Watch returns a watch.Interface that watches the requested horizontalPodAutoscalers.
+func (c *horizontalPodAutoscalers) Watch(label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
+	return c.client.Get().
+		Prefix("watch").
+		Namespace(c.ns).
+		Resource("horizontalPodAutoscalers").
+		Param("resourceVersion", resourceVersion).
+		LabelsSelectorParam(label).
+		FieldsSelectorParam(field).
+		Watch()
+}

pkg/client/unversioned/horizontalpodautoscaler_test.go

@@ -0,0 +1,143 @@
+/*
+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 unversioned
+
+import (
+	"net/url"
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/expapi"
+	"k8s.io/kubernetes/pkg/expapi/testapi"
+	"k8s.io/kubernetes/pkg/fields"
+	"k8s.io/kubernetes/pkg/labels"
+)
+
+func getHorizontalPodAutoscalersResoureName() string {
+	return "horizontalpodautoscalers"
+}
+
+func TestHorizontalPodAutoscalerCreate(t *testing.T) {
+	ns := api.NamespaceDefault
+	horizontalPodAutoscaler := expapi.HorizontalPodAutoscaler{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "abc",
+			Namespace: ns,
+		},
+	}
+	c := &testClient{
+		Request: testRequest{
+			Method: "POST",
+			Path:   testapi.ResourcePath(getHorizontalPodAutoscalersResoureName(), ns, ""),
+			Query:  buildQueryValues(nil),
+			Body:   &horizontalPodAutoscaler,
+		},
+		Response: Response{StatusCode: 200, Body: &horizontalPodAutoscaler},
+	}
+
+	response, err := c.Setup().HorizontalPodAutoscalers(ns).Create(&horizontalPodAutoscaler)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	c.Validate(t, response, err)
+}
+
+func TestHorizontalPodAutoscalerGet(t *testing.T) {
+	ns := api.NamespaceDefault
+	horizontalPodAutoscaler := &expapi.HorizontalPodAutoscaler{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "abc",
+			Namespace: ns,
+		},
+	}
+	c := &testClient{
+		Request: testRequest{
+			Method: "GET",
+			Path:   testapi.ResourcePath(getHorizontalPodAutoscalersResoureName(), ns, "abc"),
+			Query:  buildQueryValues(nil),
+			Body:   nil,
+		},
+		Response: Response{StatusCode: 200, Body: horizontalPodAutoscaler},
+	}
+
+	response, err := c.Setup().HorizontalPodAutoscalers(ns).Get("abc")
+	c.Validate(t, response, err)
+}
+
+func TestHorizontalPodAutoscalerList(t *testing.T) {
+	ns := api.NamespaceDefault
+	horizontalPodAutoscalerList := &expapi.HorizontalPodAutoscalerList{
+		Items: []expapi.HorizontalPodAutoscaler{
+			{
+				ObjectMeta: api.ObjectMeta{
+					Name:      "foo",
+					Namespace: ns,
+				},
+			},
+		},
+	}
+	c := &testClient{
+		Request: testRequest{
+			Method: "GET",
+			Path:   testapi.ResourcePath(getHorizontalPodAutoscalersResoureName(), ns, ""),
+			Query:  buildQueryValues(nil),
+			Body:   nil,
+		},
+		Response: Response{StatusCode: 200, Body: horizontalPodAutoscalerList},
+	}
+	response, err := c.Setup().HorizontalPodAutoscalers(ns).List(labels.Everything(), fields.Everything())
+	c.Validate(t, response, err)
+}
+
+func TestHorizontalPodAutoscalerUpdate(t *testing.T) {
+	ns := api.NamespaceDefault
+	horizontalPodAutoscaler := &expapi.HorizontalPodAutoscaler{
+		ObjectMeta: api.ObjectMeta{
+			Name:            "abc",
+			Namespace:       ns,
+			ResourceVersion: "1",
+		},
+	}
+	c := &testClient{
+		Request:  testRequest{Method: "PUT", Path: testapi.ResourcePath(getHorizontalPodAutoscalersResoureName(), ns, "abc"), Query: buildQueryValues(nil)},
+		Response: Response{StatusCode: 200, Body: horizontalPodAutoscaler},
+	}
+	response, err := c.Setup().HorizontalPodAutoscalers(ns).Update(horizontalPodAutoscaler)
+	c.Validate(t, response, err)
+}
+
+func TestHorizontalPodAutoscalerDelete(t *testing.T) {
+	ns := api.NamespaceDefault
+	c := &testClient{
+		Request:  testRequest{Method: "DELETE", Path: testapi.ResourcePath(getHorizontalPodAutoscalersResoureName(), ns, "foo"), Query: buildQueryValues(nil)},
+		Response: Response{StatusCode: 200},
+	}
+	err := c.Setup().HorizontalPodAutoscalers(ns).Delete("foo", nil)
+	c.Validate(t, nil, err)
+}
+
+func TestHorizontalPodAutoscalerWatch(t *testing.T) {
+	c := &testClient{
+		Request: testRequest{
+			Method: "GET",
+			Path:   testapi.ResourcePathWithPrefix("watch", getHorizontalPodAutoscalersResoureName(), "", ""),
+			Query:  url.Values{"resourceVersion": []string{}}},
+		Response: Response{StatusCode: 200},
+	}
+	_, err := c.Setup().HorizontalPodAutoscalers(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), "")
+	c.Validate(t, nil, err)
+}

pkg/controller/autoscaler/horizontalpodautoscaler_controller.go

@@ -0,0 +1,58 @@
+/*
+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 autoscalercontroller
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/client/unversioned"
+	"k8s.io/kubernetes/pkg/fields"
+	"k8s.io/kubernetes/pkg/labels"
+	"k8s.io/kubernetes/pkg/util"
+)
+
+type HorizontalPodAutoscalerController struct {
+	kubeClient unversioned.ExperimentalInterface
+}
+
+func New(kubeClient unversioned.ExperimentalInterface) *HorizontalPodAutoscalerController {
+	return &HorizontalPodAutoscalerController{
+		kubeClient: kubeClient,
+	}
+}
+
+func (a *HorizontalPodAutoscalerController) Run(syncPeriod time.Duration) {
+	go util.Forever(func() {
+		if err := a.reconcileAutoscalers(); err != nil {
+			glog.Errorf("Couldn't reconcile horizontal pod autoscalers: %v", err)
+		}
+	}, syncPeriod)
+}
+
+func (a *HorizontalPodAutoscalerController) reconcileAutoscalers() error {
+	ns := api.NamespaceAll
+	list, err := a.kubeClient.HorizontalPodAutoscalers(ns).List(labels.Everything(), fields.Everything())
+	if err != nil {
+		return fmt.Errorf("error listing nodes: %v", err)
+	}
+	// TODO: implement!
+	glog.Info("autoscalers: %v", list)
+	return nil
+}

pkg/expapi/testapi/testapi.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2014 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 testapi
+
+import (
+	"strings"
+
+	"k8s.io/kubernetes/pkg/expapi/latest"
+)
+
+// Returns the appropriate path for the given prefix (watch, proxy, redirect, etc), resource, namespace and name.
+// For example, this is of the form:
+// /experimental/v1/watch/namespaces/foo/pods/pod0 for v1.
+func ResourcePathWithPrefix(prefix, resource, namespace, name string) string {
+	path := "/experimental/" + latest.Version
+	if prefix != "" {
+		path = path + "/" + prefix
+	}
+	if namespace != "" {
+		path = path + "/namespaces/" + namespace
+	}
+	// Resource names are lower case.
+	resource = strings.ToLower(resource)
+	if resource != "" {
+		path = path + "/" + resource
+	}
+	if name != "" {
+		path = path + "/" + name
+	}
+	return path
+}
+
+// Returns the appropriate path for the given resource, namespace and name.
+// For example, this is of the form:
+// /experimental/v1/namespaces/foo/pods/pod0 for v1.
+func ResourcePath(resource, namespace, name string) string {
+	return ResourcePathWithPrefix("", resource, namespace, name)
+}