Make ResourceQuota admission and controller work generically

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

@@ -60,6 +60,7 @@ import (
 	servicecontroller "k8s.io/kubernetes/pkg/controller/service"
 	serviceaccountcontroller "k8s.io/kubernetes/pkg/controller/serviceaccount"
 	"k8s.io/kubernetes/pkg/healthz"
+	quotainstall "k8s.io/kubernetes/pkg/quota/install"
 	"k8s.io/kubernetes/pkg/serviceaccount"
 	"k8s.io/kubernetes/pkg/util"
 	"k8s.io/kubernetes/pkg/util/wait"
@@ -220,9 +221,23 @@ func StartControllers(s *options.CMServer, kubeClient *client.Client, kubeconfig
 		glog.Infof("allocate-node-cidrs set to %v, node controller not creating routes", s.AllocateNodeCIDRs)
 	}
 
-	go resourcequotacontroller.NewResourceQuotaController(
-		clientset.NewForConfigOrDie(client.AddUserAgent(kubeconfig, "resourcequota-controller")),
-		controller.StaticResyncPeriodFunc(s.ResourceQuotaSyncPeriod.Duration)).Run(s.ConcurrentResourceQuotaSyncs, wait.NeverStop)
+	resourceQuotaControllerClient := clientset.NewForConfigOrDie(client.AddUserAgent(kubeconfig, "resourcequota-controller"))
+	resourceQuotaRegistry := quotainstall.NewRegistry(resourceQuotaControllerClient)
+	groupKindsToReplenish := []unversioned.GroupKind{
+		api.Kind("Pod"),
+		api.Kind("Service"),
+		api.Kind("ReplicationController"),
+		api.Kind("PersistentVolumeClaim"),
+		api.Kind("Secret"),
+	}
+	resourceQuotaControllerOptions := &resourcequotacontroller.ResourceQuotaControllerOptions{
+		KubeClient:            resourceQuotaControllerClient,
+		ResyncPeriod:          controller.StaticResyncPeriodFunc(s.ResourceQuotaSyncPeriod.Duration),
+		Registry:              resourceQuotaRegistry,
+		GroupKindsToReplenish: groupKindsToReplenish,
+		ControllerFactory:     resourcequotacontroller.NewReplenishmentControllerFactory(resourceQuotaControllerClient),
+	}
+	go resourcequotacontroller.NewResourceQuotaController(resourceQuotaControllerOptions).Run(s.ConcurrentResourceQuotaSyncs, wait.NeverStop)
 
 	// If apiserver is not running we should wait for some time and fail only then. This is particularly
 	// important when we start apiserver and controller manager at the same time.

contrib/mesos/pkg/controllermanager/controllermanager.go

@@ -28,6 +28,7 @@ import (
 	kubecontrollermanager "k8s.io/kubernetes/cmd/kube-controller-manager/app"
 	"k8s.io/kubernetes/cmd/kube-controller-manager/app/options"
 	"k8s.io/kubernetes/contrib/mesos/pkg/node"
+	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/unversioned"
 	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 	client "k8s.io/kubernetes/pkg/client/unversioned"
@@ -53,6 +54,7 @@ import (
 	servicecontroller "k8s.io/kubernetes/pkg/controller/service"
 	serviceaccountcontroller "k8s.io/kubernetes/pkg/controller/serviceaccount"
 	"k8s.io/kubernetes/pkg/healthz"
+	quotainstall "k8s.io/kubernetes/pkg/quota/install"
 	"k8s.io/kubernetes/pkg/serviceaccount"
 	"k8s.io/kubernetes/pkg/util"
 	"k8s.io/kubernetes/pkg/util/wait"
@@ -173,8 +175,23 @@ func (s *CMServer) Run(_ []string) error {
 		routeController.Run(s.NodeSyncPeriod.Duration)
 	}
 
-	go resourcequotacontroller.NewResourceQuotaController(
-		clientset.NewForConfigOrDie(client.AddUserAgent(kubeconfig, "resource-quota-controller")), controller.StaticResyncPeriodFunc(s.ResourceQuotaSyncPeriod.Duration)).Run(s.ConcurrentResourceQuotaSyncs, wait.NeverStop)
+	resourceQuotaControllerClient := clientset.NewForConfigOrDie(client.AddUserAgent(kubeconfig, "resource-quota-controller"))
+	resourceQuotaRegistry := quotainstall.NewRegistry(resourceQuotaControllerClient)
+	groupKindsToReplenish := []unversioned.GroupKind{
+		api.Kind("Pod"),
+		api.Kind("Service"),
+		api.Kind("ReplicationController"),
+		api.Kind("PersistentVolumeClaim"),
+		api.Kind("Secret"),
+	}
+	resourceQuotaControllerOptions := &resourcequotacontroller.ResourceQuotaControllerOptions{
+		KubeClient:            resourceQuotaControllerClient,
+		ResyncPeriod:          controller.StaticResyncPeriodFunc(s.ResourceQuotaSyncPeriod.Duration),
+		Registry:              resourceQuotaRegistry,
+		GroupKindsToReplenish: groupKindsToReplenish,
+		ControllerFactory:     resourcequotacontroller.NewReplenishmentControllerFactory(resourceQuotaControllerClient),
+	}
+	go resourcequotacontroller.NewResourceQuotaController(resourceQuotaControllerOptions).Run(s.ConcurrentResourceQuotaSyncs, wait.NeverStop)
 
 	// If apiserver is not running we should wait for some time and fail only then. This is particularly
 	// important when we start apiserver and controller manager at the same time.

contrib/mesos/pkg/scheduler/resources/resource_test.go

@@ -22,7 +22,6 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/controller/resourcequota"
 )
 
 type resources struct {
@@ -81,7 +80,6 @@ func TestResources(tst *testing.T) {
 		}
 
 		tst.Logf("Testing resource computation for %v => request=%v limit=%v", t, pod.Spec.Containers[0].Resources.Requests, pod.Spec.Containers[0].Resources.Limits)
-		tst.Logf("hasRequests: cpu => %v, mem => %v", resourcequota.PodHasRequests(pod, api.ResourceCPU), resourcequota.PodHasRequests(pod, api.ResourceMemory))
 
 		beforeCpuR, beforeCpuL, _, err := LimitedCPUForPod(pod, DefaultDefaultContainerCPULimit)
 		assert.NoError(err, "CPUForPod should not return an error")

pkg/controller/resourcequota/replenishment_controller.go

@@ -0,0 +1,194 @@
+/*
+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 resourcequota
+
+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/client/cache"
+	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
+	"k8s.io/kubernetes/pkg/controller"
+	"k8s.io/kubernetes/pkg/controller/framework"
+	"k8s.io/kubernetes/pkg/quota/evaluator/core"
+	"k8s.io/kubernetes/pkg/runtime"
+	utilruntime "k8s.io/kubernetes/pkg/util/runtime"
+	"k8s.io/kubernetes/pkg/watch"
+)
+
+// ReplenishmentFunc is a function that is invoked when controller sees a change
+// that may require a quota to be replenished (i.e. object deletion, or object moved to terminal state)
+type ReplenishmentFunc func(groupKind unversioned.GroupKind, namespace string, object runtime.Object)
+
+// ReplenishmentControllerOptions is an options struct that tells a factory
+// how to configure a controller that can inform the quota system it should
+// replenish quota
+type ReplenishmentControllerOptions struct {
+	// The kind monitored for replenishment
+	GroupKind unversioned.GroupKind
+	// The period that should be used to re-sync the monitored resource
+	ResyncPeriod controller.ResyncPeriodFunc
+	// The function to invoke when a change is observed that should trigger
+	// replenishment
+	ReplenishmentFunc ReplenishmentFunc
+}
+
+// PodReplenishmentUpdateFunc will replenish if the old pod was quota tracked but the new is not
+func PodReplenishmentUpdateFunc(options *ReplenishmentControllerOptions) func(oldObj, newObj interface{}) {
+	return func(oldObj, newObj interface{}) {
+		oldPod := oldObj.(*api.Pod)
+		newPod := newObj.(*api.Pod)
+		if core.QuotaPod(oldPod) && !core.QuotaPod(newPod) {
+			options.ReplenishmentFunc(options.GroupKind, newPod.Namespace, newPod)
+		}
+	}
+}
+
+// ObjectReplenenishmentDeleteFunc will replenish on every delete
+func ObjectReplenishmentDeleteFunc(options *ReplenishmentControllerOptions) func(obj interface{}) {
+	return func(obj interface{}) {
+		metaObject, err := meta.Accessor(obj)
+		if err != nil {
+			tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
+			if !ok {
+				glog.Errorf("replenishment controller could not get object from tombstone %+v, could take up to %v before quota is replenished", obj, options.ResyncPeriod())
+				utilruntime.HandleError(err)
+				return
+			}
+			metaObject, err = meta.Accessor(tombstone.Obj)
+			if err != nil {
+				glog.Errorf("replenishment controller tombstone contained object that is not a meta %+v, could take up to %v before quota is replenished", tombstone.Obj, options.ResyncPeriod())
+				utilruntime.HandleError(err)
+				return
+			}
+		}
+		options.ReplenishmentFunc(options.GroupKind, metaObject.GetNamespace(), nil)
+	}
+}
+
+// ReplenishmentControllerFactory knows how to build replenishment controllers
+type ReplenishmentControllerFactory interface {
+	// NewController returns a controller configured with the specified options
+	NewController(options *ReplenishmentControllerOptions) (*framework.Controller, error)
+}
+
+// replenishmentControllerFactory implements ReplenishmentControllerFactory
+type replenishmentControllerFactory struct {
+	kubeClient clientset.Interface
+}
+
+// NewReplenishmentControllerFactory returns a factory that knows how to build controllers
+// to replenish resources when updated or deleted
+func NewReplenishmentControllerFactory(kubeClient clientset.Interface) ReplenishmentControllerFactory {
+	return &replenishmentControllerFactory{
+		kubeClient: kubeClient,
+	}
+}
+
+func (r *replenishmentControllerFactory) NewController(options *ReplenishmentControllerOptions) (*framework.Controller, error) {
+	var result *framework.Controller
+	switch options.GroupKind {
+	case api.Kind("Pod"):
+		_, result = framework.NewInformer(
+			&cache.ListWatch{
+				ListFunc: func(options api.ListOptions) (runtime.Object, error) {
+					return r.kubeClient.Core().Pods(api.NamespaceAll).List(options)
+				},
+				WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
+					return r.kubeClient.Core().Pods(api.NamespaceAll).Watch(options)
+				},
+			},
+			&api.Pod{},
+			options.ResyncPeriod(),
+			framework.ResourceEventHandlerFuncs{
+				UpdateFunc: PodReplenishmentUpdateFunc(options),
+				DeleteFunc: ObjectReplenishmentDeleteFunc(options),
+			},
+		)
+	case api.Kind("Service"):
+		_, result = framework.NewInformer(
+			&cache.ListWatch{
+				ListFunc: func(options api.ListOptions) (runtime.Object, error) {
+					return r.kubeClient.Core().Services(api.NamespaceAll).List(options)
+				},
+				WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
+					return r.kubeClient.Core().Services(api.NamespaceAll).Watch(options)
+				},
+			},
+			&api.Service{},
+			options.ResyncPeriod(),
+			framework.ResourceEventHandlerFuncs{
+				DeleteFunc: ObjectReplenishmentDeleteFunc(options),
+			},
+		)
+	case api.Kind("ReplicationController"):
+		_, result = framework.NewInformer(
+			&cache.ListWatch{
+				ListFunc: func(options api.ListOptions) (runtime.Object, error) {
+					return r.kubeClient.Core().ReplicationControllers(api.NamespaceAll).List(options)
+				},
+				WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
+					return r.kubeClient.Core().ReplicationControllers(api.NamespaceAll).Watch(options)
+				},
+			},
+			&api.ReplicationController{},
+			options.ResyncPeriod(),
+			framework.ResourceEventHandlerFuncs{
+				DeleteFunc: ObjectReplenishmentDeleteFunc(options),
+			},
+		)
+	case api.Kind("PersistentVolumeClaim"):
+		_, result = framework.NewInformer(
+			&cache.ListWatch{
+				ListFunc: func(options api.ListOptions) (runtime.Object, error) {
+					return r.kubeClient.Core().PersistentVolumeClaims(api.NamespaceAll).List(options)
+				},
+				WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
+					return r.kubeClient.Core().PersistentVolumeClaims(api.NamespaceAll).Watch(options)
+				},
+			},
+			&api.PersistentVolumeClaim{},
+			options.ResyncPeriod(),
+			framework.ResourceEventHandlerFuncs{
+				DeleteFunc: ObjectReplenishmentDeleteFunc(options),
+			},
+		)
+	case api.Kind("Secret"):
+		_, result = framework.NewInformer(
+			&cache.ListWatch{
+				ListFunc: func(options api.ListOptions) (runtime.Object, error) {
+					return r.kubeClient.Core().Secrets(api.NamespaceAll).List(options)
+				},
+				WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
+					return r.kubeClient.Core().Secrets(api.NamespaceAll).Watch(options)
+				},
+			},
+			&api.PersistentVolumeClaim{},
+			options.ResyncPeriod(),
+			framework.ResourceEventHandlerFuncs{
+				DeleteFunc: ObjectReplenishmentDeleteFunc(options),
+			},
+		)
+	default:
+		return nil, fmt.Errorf("no replenishment controller available for %s", options.GroupKind)
+	}
+	return result, nil
+}

pkg/controller/resourcequota/replenishment_controller_test.go

@@ -0,0 +1,84 @@
+/*
+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 resourcequota
+
+import (
+	"testing"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/controller"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+// testReplenishment lets us test replenishment functions are invoked
+type testReplenishment struct {
+	groupKind unversioned.GroupKind
+	namespace string
+}
+
+// mock function that holds onto the last kind that was replenished
+func (t *testReplenishment) Replenish(groupKind unversioned.GroupKind, namespace string, object runtime.Object) {
+	t.groupKind = groupKind
+	t.namespace = namespace
+}
+
+func TestPodReplenishmentUpdateFunc(t *testing.T) {
+	mockReplenish := &testReplenishment{}
+	options := ReplenishmentControllerOptions{
+		GroupKind:         api.Kind("Pod"),
+		ReplenishmentFunc: mockReplenish.Replenish,
+		ResyncPeriod:      controller.NoResyncPeriodFunc,
+	}
+	oldPod := &api.Pod{
+		ObjectMeta: api.ObjectMeta{Namespace: "test", Name: "pod"},
+		Status:     api.PodStatus{Phase: api.PodRunning},
+	}
+	newPod := &api.Pod{
+		ObjectMeta: api.ObjectMeta{Namespace: "test", Name: "pod"},
+		Status:     api.PodStatus{Phase: api.PodFailed},
+	}
+	updateFunc := PodReplenishmentUpdateFunc(&options)
+	updateFunc(oldPod, newPod)
+	if mockReplenish.groupKind != api.Kind("Pod") {
+		t.Errorf("Unexpected group kind %v", mockReplenish.groupKind)
+	}
+	if mockReplenish.namespace != oldPod.Namespace {
+		t.Errorf("Unexpected namespace %v", mockReplenish.namespace)
+	}
+}
+
+func TestObjectReplenishmentDeleteFunc(t *testing.T) {
+	mockReplenish := &testReplenishment{}
+	options := ReplenishmentControllerOptions{
+		GroupKind:         api.Kind("Pod"),
+		ReplenishmentFunc: mockReplenish.Replenish,
+		ResyncPeriod:      controller.NoResyncPeriodFunc,
+	}
+	oldPod := &api.Pod{
+		ObjectMeta: api.ObjectMeta{Namespace: "test", Name: "pod"},
+		Status:     api.PodStatus{Phase: api.PodRunning},
+	}
+	deleteFunc := ObjectReplenishmentDeleteFunc(&options)
+	deleteFunc(oldPod)
+	if mockReplenish.groupKind != api.Kind("Pod") {
+		t.Errorf("Unexpected group kind %v", mockReplenish.groupKind)
+	}
+	if mockReplenish.namespace != oldPod.Namespace {
+		t.Errorf("Unexpected namespace %v", mockReplenish.namespace)
+	}
+}

pkg/controller/resourcequota/resource_quota_controller.go

@@ -17,16 +17,17 @@ limitations under the License.
 package resourcequota
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/golang/glog"
+
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/api/resource"
+	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/client/cache"
 	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 	"k8s.io/kubernetes/pkg/controller"
 	"k8s.io/kubernetes/pkg/controller/framework"
+	"k8s.io/kubernetes/pkg/quota"
 	"k8s.io/kubernetes/pkg/runtime"
 	utilruntime "k8s.io/kubernetes/pkg/util/runtime"
 	"k8s.io/kubernetes/pkg/util/wait"
@@ -34,6 +35,21 @@ import (
 	"k8s.io/kubernetes/pkg/watch"
 )
 
+// ResourceQuotaControllerOptions holds options for creating a quota controller
+type ResourceQuotaControllerOptions struct {
+	// Must have authority to list all quotas, and update quota status
+	KubeClient clientset.Interface
+	// Controls full recalculation of quota usage
+	ResyncPeriod controller.ResyncPeriodFunc
+	// Knows how to calculate usage
+	Registry quota.Registry
+	// Knows how to build controllers that notify replenishment events
+	ControllerFactory ReplenishmentControllerFactory
+	// List of GroupKind objects that should be monitored for replenishment at
+	// a faster frequency than the quota controller recalculation interval
+	GroupKindsToReplenish []unversioned.GroupKind
+}
+
 // ResourceQuotaController is responsible for tracking quota usage status in the system
 type ResourceQuotaController struct {
 	// Must have authority to list all resources in the system, and update quota status
@@ -42,27 +58,32 @@ type ResourceQuotaController struct {
 	rqIndexer cache.Indexer
 	// Watches changes to all resource quota
 	rqController *framework.Controller
-	// A store of pods, populated by the podController
-	podStore cache.StoreToPodLister
-	// Watches changes to all pods (so we can optimize release of compute resources)
-	podController *framework.Controller
 	// ResourceQuota objects that need to be synchronized
 	queue *workqueue.Type
 	// To allow injection of syncUsage for testing.
 	syncHandler func(key string) error
 	// function that controls full recalculation of quota usage
 	resyncPeriod controller.ResyncPeriodFunc
+	// knows how to calculate usage
+	registry quota.Registry
+	// controllers monitoring to notify for replenishment
+	replenishmentControllers []*framework.Controller
 }
 
-// NewResourceQuotaController creates a new ResourceQuotaController
-func NewResourceQuotaController(kubeClient clientset.Interface, resyncPeriod controller.ResyncPeriodFunc) *ResourceQuotaController {
-
+func NewResourceQuotaController(options *ResourceQuotaControllerOptions) *ResourceQuotaController {
+	// build the resource quota controller
 	rq := &ResourceQuotaController{
-		kubeClient:   kubeClient,
+		kubeClient:               options.KubeClient,
 		queue:                    workqueue.New(),
-		resyncPeriod: resyncPeriod,
+		resyncPeriod:             options.ResyncPeriod,
+		registry:                 options.Registry,
+		replenishmentControllers: []*framework.Controller{},
 	}
 
+	// set the synchronization handler
+	rq.syncHandler = rq.syncResourceQuotaFromKey
+
+	// build the controller that observes quota
 	rq.rqIndexer, rq.rqController = framework.NewIndexerInformer(
 		&cache.ListWatch{
 			ListFunc: func(options api.ListOptions) (runtime.Object, error) {
@@ -73,7 +94,7 @@ func NewResourceQuotaController(kubeClient clientset.Interface, resyncPeriod con
 			},
 		},
 		&api.ResourceQuota{},
-		resyncPeriod(),
+		rq.resyncPeriod(),
 		framework.ResourceEventHandlerFuncs{
 			AddFunc: rq.enqueueResourceQuota,
 			UpdateFunc: func(old, cur interface{}) {
@@ -87,10 +108,9 @@ func NewResourceQuotaController(kubeClient clientset.Interface, resyncPeriod con
 				// responsible for enqueue of all resource quotas when doing a full resync (enqueueAll)
 				oldResourceQuota := old.(*api.ResourceQuota)
 				curResourceQuota := cur.(*api.ResourceQuota)
-				if api.Semantic.DeepEqual(oldResourceQuota.Spec.Hard, curResourceQuota.Status.Hard) {
+				if quota.Equals(curResourceQuota.Spec.Hard, oldResourceQuota.Spec.Hard) {
 					return
 				}
-				glog.V(4).Infof("Observed updated quota spec for %v/%v", curResourceQuota.Namespace, curResourceQuota.Name)
 				rq.enqueueResourceQuota(curResourceQuota)
 			},
 			// This will enter the sync loop and no-op, because the controller has been deleted from the store.
@@ -101,26 +121,19 @@ func NewResourceQuotaController(kubeClient clientset.Interface, resyncPeriod con
 		cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc},
 	)
 
-	// We use this pod controller to rapidly observe when a pod deletion occurs in order to
-	// release compute resources from any associated quota.
-	rq.podStore.Store, rq.podController = framework.NewInformer(
-		&cache.ListWatch{
-			ListFunc: func(options api.ListOptions) (runtime.Object, error) {
-				return rq.kubeClient.Core().Pods(api.NamespaceAll).List(options)
-			},
-			WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
-				return rq.kubeClient.Core().Pods(api.NamespaceAll).Watch(options)
-			},
-		},
-		&api.Pod{},
-		resyncPeriod(),
-		framework.ResourceEventHandlerFuncs{
-			DeleteFunc: rq.deletePod,
-		},
-	)
-
-	// set the synchronization handler
-	rq.syncHandler = rq.syncResourceQuotaFromKey
+	for _, groupKindToReplenish := range options.GroupKindsToReplenish {
+		controllerOptions := &ReplenishmentControllerOptions{
+			GroupKind:         groupKindToReplenish,
+			ResyncPeriod:      options.ResyncPeriod,
+			ReplenishmentFunc: rq.replenishQuota,
+		}
+		replenishmentController, err := options.ControllerFactory.NewController(controllerOptions)
+		if err != nil {
+			glog.Warningf("quota controller unable to replenish %s due to %v, changes only accounted during full resync", groupKindToReplenish, err)
+		} else {
+			rq.replenishmentControllers = append(rq.replenishmentControllers, replenishmentController)
+		}
+	}
 	return rq
 }
 
@@ -155,6 +168,7 @@ func (rq *ResourceQuotaController) worker() {
 			err := rq.syncHandler(key.(string))
 			if err != nil {
 				utilruntime.HandleError(err)
+				rq.queue.Add(key)
 			}
 		}()
 	}
@@ -164,45 +178,21 @@ func (rq *ResourceQuotaController) worker() {
 func (rq *ResourceQuotaController) Run(workers int, stopCh <-chan struct{}) {
 	defer utilruntime.HandleCrash()
 	go rq.rqController.Run(stopCh)
-	go rq.podController.Run(stopCh)
+	// the controllers that replenish other resources to respond rapidly to state changes
+	for _, replenishmentController := range rq.replenishmentControllers {
+		go replenishmentController.Run(stopCh)
+	}
+	// the workers that chug through the quota calculation backlog
 	for i := 0; i < workers; i++ {
 		go wait.Until(rq.worker, time.Second, stopCh)
 	}
+	// the timer for how often we do a full recalculation across all quotas
 	go wait.Until(func() { rq.enqueueAll() }, rq.resyncPeriod(), stopCh)
 	<-stopCh
 	glog.Infof("Shutting down ResourceQuotaController")
 	rq.queue.ShutDown()
 }
 
-// FilterQuotaPods eliminates pods that no longer have a cost against the quota
-// pods that have a restart policy of always are always returned
-// pods that are in a failed state, but have a restart policy of on failure are always returned
-// pods that are not in a success state or a failure state are included in quota
-func FilterQuotaPods(pods []api.Pod) []*api.Pod {
-	var result []*api.Pod
-	for i := range pods {
-		value := &pods[i]
-		// a pod that has a restart policy always no matter its state counts against usage
-		if value.Spec.RestartPolicy == api.RestartPolicyAlways {
-			result = append(result, value)
-			continue
-		}
-		// a failed pod with a restart policy of on failure will count against usage
-		if api.PodFailed == value.Status.Phase &&
-			value.Spec.RestartPolicy == api.RestartPolicyOnFailure {
-			result = append(result, value)
-			continue
-		}
-		// if the pod is not succeeded or failed, then we count it against quota
-		if api.PodSucceeded != value.Status.Phase &&
-			api.PodFailed != value.Status.Phase {
-			result = append(result, value)
-			continue
-		}
-	}
-	return result
-}
-
 // syncResourceQuotaFromKey syncs a quota key
 func (rq *ResourceQuotaController) syncResourceQuotaFromKey(key string) (err error) {
 	startTime := time.Now()
@@ -224,115 +214,68 @@ func (rq *ResourceQuotaController) syncResourceQuotaFromKey(key string) (err err
 	return rq.syncResourceQuota(quota)
 }
 
-// syncResourceQuota runs a complete sync of current status
-func (rq *ResourceQuotaController) syncResourceQuota(quota api.ResourceQuota) (err error) {
-
+// syncResourceQuota runs a complete sync of resource quota status across all known kinds
+func (rq *ResourceQuotaController) syncResourceQuota(resourceQuota api.ResourceQuota) (err error) {
 	// quota is dirty if any part of spec hard limits differs from the status hard limits
-	dirty := !api.Semantic.DeepEqual(quota.Spec.Hard, quota.Status.Hard)
+	dirty := !api.Semantic.DeepEqual(resourceQuota.Spec.Hard, resourceQuota.Status.Hard)
 
 	// dirty tracks if the usage status differs from the previous sync,
 	// if so, we send a new usage with latest status
 	// if this is our first sync, it will be dirty by default, since we need track usage
-	dirty = dirty || (quota.Status.Hard == nil || quota.Status.Used == nil)
+	dirty = dirty || (resourceQuota.Status.Hard == nil || resourceQuota.Status.Used == nil)
 
-	// Create a usage object that is based on the quota resource version
+	// Create a usage object that is based on the quota resource version that will handle updates
+	// by default, we preserve the past usage observation, and set hard to the current spec
+	previousUsed := api.ResourceList{}
+	if resourceQuota.Status.Used != nil {
+		previousUsed = quota.Add(api.ResourceList{}, resourceQuota.Status.Used)
+	}
 	usage := api.ResourceQuota{
 		ObjectMeta: api.ObjectMeta{
-			Name:            quota.Name,
-			Namespace:       quota.Namespace,
-			ResourceVersion: quota.ResourceVersion,
-			Labels:          quota.Labels,
-			Annotations:     quota.Annotations},
+			Name:            resourceQuota.Name,
+			Namespace:       resourceQuota.Namespace,
+			ResourceVersion: resourceQuota.ResourceVersion,
+			Labels:          resourceQuota.Labels,
+			Annotations:     resourceQuota.Annotations},
 		Status: api.ResourceQuotaStatus{
-			Hard: api.ResourceList{},
-			Used: api.ResourceList{},
+			Hard: quota.Add(api.ResourceList{}, resourceQuota.Spec.Hard),
+			Used: previousUsed,
 		},
 	}
 
-	// set the hard values supported on the quota
-	for k, v := range quota.Spec.Hard {
-		usage.Status.Hard[k] = *v.Copy()
-	}
-	// set any last known observed status values for usage
-	for k, v := range quota.Status.Used {
-		usage.Status.Used[k] = *v.Copy()
+	// find the intersection between the hard resources on the quota
+	// and the resources this controller can track to know what we can
+	// look to measure updated usage stats for
+	hardResources := quota.ResourceNames(usage.Status.Hard)
+	potentialResources := []api.ResourceName{}
+	evaluators := rq.registry.Evaluators()
+	for _, evaluator := range evaluators {
+		potentialResources = append(potentialResources, evaluator.MatchesResources()...)
 	}
+	matchedResources := quota.Intersection(hardResources, potentialResources)
 
-	set := map[api.ResourceName]bool{}
-	for k := range usage.Status.Hard {
-		set[k] = true
-	}
-
-	pods := &api.PodList{}
-	if set[api.ResourcePods] || set[api.ResourceMemory] || set[api.ResourceCPU] {
-		pods, err = rq.kubeClient.Core().Pods(usage.Namespace).List(api.ListOptions{})
+	// sum the observed usage from each evaluator
+	newUsage := api.ResourceList{}
+	usageStatsOptions := quota.UsageStatsOptions{Namespace: resourceQuota.Namespace, Scopes: resourceQuota.Spec.Scopes}
+	for _, evaluator := range evaluators {
+		stats, err := evaluator.UsageStats(usageStatsOptions)
 		if err != nil {
 			return err
 		}
+		newUsage = quota.Add(newUsage, stats.Used)
 	}
 
-	filteredPods := FilterQuotaPods(pods.Items)
-
-	// iterate over each resource, and update observation
-	for k := range usage.Status.Hard {
-
-		// look if there is a used value, if none, we are definitely dirty
-		prevQuantity, found := usage.Status.Used[k]
-		if !found {
-			dirty = true
+	// mask the observed usage to only the set of resources tracked by this quota
+	// merge our observed usage with the quota usage status
+	// if the new usage is different than the last usage, we will need to do an update
+	newUsage = quota.Mask(newUsage, matchedResources)
+	for key, value := range newUsage {
+		usage.Status.Used[key] = value
 	}
 
-		var value *resource.Quantity
+	dirty = dirty || !quota.Equals(usage.Status.Used, resourceQuota.Status.Used)
 
-		switch k {
-		case api.ResourcePods:
-			value = resource.NewQuantity(int64(len(filteredPods)), resource.DecimalSI)
-		case api.ResourceServices:
-			items, err := rq.kubeClient.Core().Services(usage.Namespace).List(api.ListOptions{})
-			if err != nil {
-				return err
-			}
-			value = resource.NewQuantity(int64(len(items.Items)), resource.DecimalSI)
-		case api.ResourceReplicationControllers:
-			items, err := rq.kubeClient.Core().ReplicationControllers(usage.Namespace).List(api.ListOptions{})
-			if err != nil {
-				return err
-			}
-			value = resource.NewQuantity(int64(len(items.Items)), resource.DecimalSI)
-		case api.ResourceQuotas:
-			items, err := rq.kubeClient.Core().ResourceQuotas(usage.Namespace).List(api.ListOptions{})
-			if err != nil {
-				return err
-			}
-			value = resource.NewQuantity(int64(len(items.Items)), resource.DecimalSI)
-		case api.ResourceSecrets:
-			items, err := rq.kubeClient.Core().Secrets(usage.Namespace).List(api.ListOptions{})
-			if err != nil {
-				return err
-			}
-			value = resource.NewQuantity(int64(len(items.Items)), resource.DecimalSI)
-		case api.ResourcePersistentVolumeClaims:
-			items, err := rq.kubeClient.Core().PersistentVolumeClaims(usage.Namespace).List(api.ListOptions{})
-			if err != nil {
-				return err
-			}
-			value = resource.NewQuantity(int64(len(items.Items)), resource.DecimalSI)
-		case api.ResourceMemory:
-			value = PodsRequests(filteredPods, api.ResourceMemory)
-		case api.ResourceCPU:
-			value = PodsRequests(filteredPods, api.ResourceCPU)
-		}
-
-		// ignore fields we do not understand (assume another controller is tracking it)
-		if value != nil {
-			// see if the value has changed
-			dirty = dirty || (value.Value() != prevQuantity.Value())
-			// just update the value
-			usage.Status.Used[k] = *value
-		}
-	}
-
-	// update the usage only if it changed
+	// there was a change observed by this controller that requires we update quota
 	if dirty {
 		_, err = rq.kubeClient.Core().ResourceQuotas(usage.Namespace).UpdateStatus(&usage)
 		return err
@@ -340,102 +283,20 @@ func (rq *ResourceQuotaController) syncResourceQuota(quota api.ResourceQuota) (e
 	return nil
 }
 
-// PodsRequests returns sum of each resource request for each pod in list
-// If a given pod in the list does not have a request for the named resource, we log the error
-// but still attempt to get the most representative count
-func PodsRequests(pods []*api.Pod, resourceName api.ResourceName) *resource.Quantity {
-	var sum *resource.Quantity
-	for i := range pods {
-		pod := pods[i]
-		podQuantity, err := PodRequests(pod, resourceName)
+// replenishQuota is a replenishment function invoked by a controller to notify that a quota should be recalculated
+func (rq *ResourceQuotaController) replenishQuota(groupKind unversioned.GroupKind, namespace string, object runtime.Object) {
+	// TODO: make this support targeted replenishment to a specific kind, right now it does a full replenish
+	indexKey := &api.ResourceQuota{}
+	indexKey.Namespace = namespace
+	resourceQuotas, err := rq.rqIndexer.Index("namespace", indexKey)
 	if err != nil {
-			// log the error, but try to keep the most accurate count possible in log
-			// rationale here is that you may have had pods in a namespace that did not have
-			// explicit requests prior to adding the quota
-			glog.Infof("No explicit request for resource, pod %s/%s, %s", pod.Namespace, pod.Name, resourceName)
-		} else {
-			if sum == nil {
-				sum = podQuantity
-			} else {
-				sum.Add(*podQuantity)
+		glog.Errorf("quota controller could not find ResourceQuota associated with namespace: %s, could take up to %v before a quota replenishes", namespace, rq.resyncPeriod())
 	}
-		}
-	}
-	// if list is empty
-	if sum == nil {
-		q := resource.MustParse("0")
-		sum = &q
-	}
-	return sum
-}
-
-// PodRequests returns sum of each resource request across all containers in pod
-func PodRequests(pod *api.Pod, resourceName api.ResourceName) (*resource.Quantity, error) {
-	if !PodHasRequests(pod, resourceName) {
-		return nil, fmt.Errorf("Each container in pod %s/%s does not have an explicit request for resource %s.", pod.Namespace, pod.Name, resourceName)
-	}
-	var sum *resource.Quantity
-	for j := range pod.Spec.Containers {
-		value, _ := pod.Spec.Containers[j].Resources.Requests[resourceName]
-		if sum == nil {
-			sum = value.Copy()
-		} else {
-			err := sum.Add(value)
-			if err != nil {
-				return sum, err
-			}
-		}
-	}
-	// if list is empty
-	if sum == nil {
-		q := resource.MustParse("0")
-		sum = &q
-	}
-	return sum, nil
-}
-
-// PodHasRequests verifies that each container in the pod has an explicit request that is non-zero for a named resource
-func PodHasRequests(pod *api.Pod, resourceName api.ResourceName) bool {
-	for j := range pod.Spec.Containers {
-		value, valueSet := pod.Spec.Containers[j].Resources.Requests[resourceName]
-		if !valueSet || value.Value() == int64(0) {
-			return false
-		}
-	}
-	return true
-}
-
-// When a pod is deleted, enqueue the quota that manages the pod and update its expectations.
-// obj could be an *api.Pod, or a DeletionFinalStateUnknown marker item.
-func (rq *ResourceQuotaController) deletePod(obj interface{}) {
-	pod, ok := obj.(*api.Pod)
-	// When a delete is dropped, the relist will notice a pod in the store not
-	// in the list, leading to the insertion of a tombstone object which contains
-	// the deleted key/value. Note that this value might be stale. If the pod
-	// changed labels the new rc will not be woken up till the periodic resync.
-	if !ok {
-		tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
-		if !ok {
-			glog.Errorf("Couldn't get object from tombstone %+v, could take up to %v before a quota records the deletion", obj, rq.resyncPeriod())
+	if len(resourceQuotas) == 0 {
 		return
 	}
-		pod, ok = tombstone.Obj.(*api.Pod)
-		if !ok {
-			glog.Errorf("Tombstone contained object that is not a pod %+v, could take up to %v before quota records the deletion", obj, rq.resyncPeriod())
-			return
-		}
-	}
-
-	quotas, err := rq.rqIndexer.Index("namespace", pod)
-	if err != nil {
-		glog.Errorf("Couldn't find resource quota associated with pod %+v, could take up to %v before a quota records the deletion", obj, rq.resyncPeriod())
-	}
-	if len(quotas) == 0 {
-		glog.V(4).Infof("No resource quota associated with namespace %q", pod.Namespace)
-		return
-	}
-	for i := range quotas {
-		quota := quotas[i].(*api.ResourceQuota)
-		rq.enqueueResourceQuota(quota)
+	for i := range resourceQuotas {
+		resourceQuota := resourceQuotas[i].(*api.ResourceQuota)
+		rq.enqueueResourceQuota(resourceQuota)
 	}
 }

pkg/controller/resourcequota/resource_quota_controller_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2014 The Kubernetes Authors All rights reserved.
+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.
@@ -17,15 +17,16 @@ limitations under the License.
 package resourcequota
 
 import (
-	"strconv"
+	"strings"
 	"testing"
-	"time"
 
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/resource"
+	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
 	"k8s.io/kubernetes/pkg/client/unversioned/testclient"
 	"k8s.io/kubernetes/pkg/controller"
+	"k8s.io/kubernetes/pkg/quota/install"
 	"k8s.io/kubernetes/pkg/util/sets"
 )
 
@@ -47,85 +48,11 @@ func getResourceRequirements(requests, limits api.ResourceList) api.ResourceRequ
 	return res
 }
 
-func validPod(name string, numContainers int, resources api.ResourceRequirements) *api.Pod {
-	pod := &api.Pod{
-		ObjectMeta: api.ObjectMeta{Name: name, Namespace: "test"},
-		Spec:       api.PodSpec{},
-	}
-	pod.Spec.Containers = make([]api.Container, 0, numContainers)
-	for i := 0; i < numContainers; i++ {
-		pod.Spec.Containers = append(pod.Spec.Containers, api.Container{
-			Image:     "foo:V" + strconv.Itoa(i),
-			Resources: resources,
-		})
-	}
-	return pod
-}
-
-func TestFilterQuotaPods(t *testing.T) {
-	pods := []api.Pod{
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-running"},
-			Status:     api.PodStatus{Phase: api.PodRunning},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-pending"},
-			Status:     api.PodStatus{Phase: api.PodPending},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-succeeded"},
-			Status:     api.PodStatus{Phase: api.PodSucceeded},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-unknown"},
-			Status:     api.PodStatus{Phase: api.PodUnknown},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-failed"},
-			Status:     api.PodStatus{Phase: api.PodFailed},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-failed-with-restart-always"},
-			Spec: api.PodSpec{
-				RestartPolicy: api.RestartPolicyAlways,
-			},
-			Status: api.PodStatus{Phase: api.PodFailed},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-failed-with-restart-on-failure"},
-			Spec: api.PodSpec{
-				RestartPolicy: api.RestartPolicyOnFailure,
-			},
-			Status: api.PodStatus{Phase: api.PodFailed},
-		},
-		{
-			ObjectMeta: api.ObjectMeta{Name: "pod-failed-with-restart-never"},
-			Spec: api.PodSpec{
-				RestartPolicy: api.RestartPolicyNever,
-			},
-			Status: api.PodStatus{Phase: api.PodFailed},
-		},
-	}
-	expectedResults := sets.NewString("pod-running",
-		"pod-pending", "pod-unknown", "pod-failed-with-restart-always",
-		"pod-failed-with-restart-on-failure")
-
-	actualResults := sets.String{}
-	result := FilterQuotaPods(pods)
-	for i := range result {
-		actualResults.Insert(result[i].Name)
-	}
-
-	if len(expectedResults) != len(actualResults) || !actualResults.HasAll(expectedResults.List()...) {
-		t.Errorf("Expected results %v, Actual results %v", expectedResults, actualResults)
-	}
-}
-
 func TestSyncResourceQuota(t *testing.T) {
 	podList := api.PodList{
 		Items: []api.Pod{
 			{
-				ObjectMeta: api.ObjectMeta{Name: "pod-running"},
+				ObjectMeta: api.ObjectMeta{Name: "pod-running", Namespace: "testing"},
 				Status:     api.PodStatus{Phase: api.PodRunning},
 				Spec: api.PodSpec{
 					Volumes:    []api.Volume{{Name: "vol"}},
@@ -133,7 +60,7 @@ func TestSyncResourceQuota(t *testing.T) {
 				},
 			},
 			{
-				ObjectMeta: api.ObjectMeta{Name: "pod-running-2"},
+				ObjectMeta: api.ObjectMeta{Name: "pod-running-2", Namespace: "testing"},
 				Status:     api.PodStatus{Phase: api.PodRunning},
 				Spec: api.PodSpec{
 					Volumes:    []api.Volume{{Name: "vol"}},
@@ -141,7 +68,7 @@ func TestSyncResourceQuota(t *testing.T) {
 				},
 			},
 			{
-				ObjectMeta: api.ObjectMeta{Name: "pod-failed"},
+				ObjectMeta: api.ObjectMeta{Name: "pod-failed", Namespace: "testing"},
 				Status:     api.PodStatus{Phase: api.PodFailed},
 				Spec: api.PodSpec{
 					Volumes:    []api.Volume{{Name: "vol"}},
@@ -150,7 +77,8 @@ func TestSyncResourceQuota(t *testing.T) {
 			},
 		},
 	}
-	quota := api.ResourceQuota{
+	resourceQuota := api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota", Namespace: "testing"},
 		Spec: api.ResourceQuotaSpec{
 			Hard: api.ResourceList{
 				api.ResourceCPU:    resource.MustParse("3"),
@@ -174,15 +102,43 @@ func TestSyncResourceQuota(t *testing.T) {
 		},
 	}
 
-	kubeClient := fake.NewSimpleClientset(&podList, &quota)
-
-	ResourceQuotaController := NewResourceQuotaController(kubeClient, controller.StaticResyncPeriodFunc(time.Second))
-	err := ResourceQuotaController.syncResourceQuota(quota)
+	kubeClient := fake.NewSimpleClientset(&podList, &resourceQuota)
+	resourceQuotaControllerOptions := &ResourceQuotaControllerOptions{
+		KubeClient:   kubeClient,
+		ResyncPeriod: controller.NoResyncPeriodFunc,
+		Registry:     install.NewRegistry(kubeClient),
+		GroupKindsToReplenish: []unversioned.GroupKind{
+			api.Kind("Pod"),
+			api.Kind("Service"),
+			api.Kind("ReplicationController"),
+			api.Kind("PersistentVolumeClaim"),
+		},
+		ControllerFactory: NewReplenishmentControllerFactory(kubeClient),
+	}
+	quotaController := NewResourceQuotaController(resourceQuotaControllerOptions)
+	err := quotaController.syncResourceQuota(resourceQuota)
 	if err != nil {
 		t.Fatalf("Unexpected error %v", err)
 	}
+	expectedActionSet := sets.NewString(
+		strings.Join([]string{"list", "replicationcontrollers", ""}, "-"),
+		strings.Join([]string{"list", "services", ""}, "-"),
+		strings.Join([]string{"list", "pods", ""}, "-"),
+		strings.Join([]string{"list", "resourcequotas", ""}, "-"),
+		strings.Join([]string{"list", "secrets", ""}, "-"),
+		strings.Join([]string{"list", "persistentvolumeclaims", ""}, "-"),
+		strings.Join([]string{"update", "resourcequotas", "status"}, "-"),
+	)
+	actionSet := sets.NewString()
+	for _, action := range kubeClient.Actions() {
+		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
+	}
+	if !actionSet.HasAll(expectedActionSet.List()...) {
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
+	}
 
-	usage := kubeClient.Actions()[1].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
+	lastActionIndex := len(kubeClient.Actions()) - 1
+	usage := kubeClient.Actions()[lastActionIndex].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
 
 	// ensure hard and used limits are what we expected
 	for k, v := range expectedUsage.Status.Hard {
@@ -204,7 +160,7 @@ func TestSyncResourceQuota(t *testing.T) {
 }
 
 func TestSyncResourceQuotaSpecChange(t *testing.T) {
-	quota := api.ResourceQuota{
+	resourceQuota := api.ResourceQuota{
 		Spec: api.ResourceQuotaSpec{
 			Hard: api.ResourceList{
 				api.ResourceCPU: resource.MustParse("4"),
@@ -231,15 +187,44 @@ func TestSyncResourceQuotaSpecChange(t *testing.T) {
 		},
 	}
 
-	kubeClient := fake.NewSimpleClientset(&quota)
-
-	ResourceQuotaController := NewResourceQuotaController(kubeClient, controller.StaticResyncPeriodFunc(time.Second))
-	err := ResourceQuotaController.syncResourceQuota(quota)
+	kubeClient := fake.NewSimpleClientset(&resourceQuota)
+	resourceQuotaControllerOptions := &ResourceQuotaControllerOptions{
+		KubeClient:   kubeClient,
+		ResyncPeriod: controller.NoResyncPeriodFunc,
+		Registry:     install.NewRegistry(kubeClient),
+		GroupKindsToReplenish: []unversioned.GroupKind{
+			api.Kind("Pod"),
+			api.Kind("Service"),
+			api.Kind("ReplicationController"),
+			api.Kind("PersistentVolumeClaim"),
+		},
+		ControllerFactory: NewReplenishmentControllerFactory(kubeClient),
+	}
+	quotaController := NewResourceQuotaController(resourceQuotaControllerOptions)
+	err := quotaController.syncResourceQuota(resourceQuota)
 	if err != nil {
 		t.Fatalf("Unexpected error %v", err)
 	}
 
-	usage := kubeClient.Actions()[1].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
+	expectedActionSet := sets.NewString(
+		strings.Join([]string{"list", "replicationcontrollers", ""}, "-"),
+		strings.Join([]string{"list", "services", ""}, "-"),
+		strings.Join([]string{"list", "pods", ""}, "-"),
+		strings.Join([]string{"list", "resourcequotas", ""}, "-"),
+		strings.Join([]string{"list", "secrets", ""}, "-"),
+		strings.Join([]string{"list", "persistentvolumeclaims", ""}, "-"),
+		strings.Join([]string{"update", "resourcequotas", "status"}, "-"),
+	)
+	actionSet := sets.NewString()
+	for _, action := range kubeClient.Actions() {
+		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
+	}
+	if !actionSet.HasAll(expectedActionSet.List()...) {
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
+	}
+
+	lastActionIndex := len(kubeClient.Actions()) - 1
+	usage := kubeClient.Actions()[lastActionIndex].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
 
 	// ensure hard and used limits are what we expected
 	for k, v := range expectedUsage.Status.Hard {
@@ -262,7 +247,7 @@ func TestSyncResourceQuotaSpecChange(t *testing.T) {
 }
 
 func TestSyncResourceQuotaNoChange(t *testing.T) {
-	quota := api.ResourceQuota{
+	resourceQuota := api.ResourceQuota{
 		Spec: api.ResourceQuotaSpec{
 			Hard: api.ResourceList{
 				api.ResourceCPU: resource.MustParse("4"),
@@ -278,165 +263,37 @@ func TestSyncResourceQuotaNoChange(t *testing.T) {
 		},
 	}
 
-	kubeClient := fake.NewSimpleClientset(&api.PodList{}, &quota)
-
-	ResourceQuotaController := NewResourceQuotaController(kubeClient, controller.StaticResyncPeriodFunc(time.Second))
-	err := ResourceQuotaController.syncResourceQuota(quota)
+	kubeClient := fake.NewSimpleClientset(&api.PodList{}, &resourceQuota)
+	resourceQuotaControllerOptions := &ResourceQuotaControllerOptions{
+		KubeClient:   kubeClient,
+		ResyncPeriod: controller.NoResyncPeriodFunc,
+		Registry:     install.NewRegistry(kubeClient),
+		GroupKindsToReplenish: []unversioned.GroupKind{
+			api.Kind("Pod"),
+			api.Kind("Service"),
+			api.Kind("ReplicationController"),
+			api.Kind("PersistentVolumeClaim"),
+		},
+		ControllerFactory: NewReplenishmentControllerFactory(kubeClient),
+	}
+	quotaController := NewResourceQuotaController(resourceQuotaControllerOptions)
+	err := quotaController.syncResourceQuota(resourceQuota)
 	if err != nil {
 		t.Fatalf("Unexpected error %v", err)
 	}
-
-	actions := kubeClient.Actions()
-	if len(actions) != 1 && !actions[0].Matches("list", "pods") {
-		t.Errorf("SyncResourceQuota made an unexpected client action when state was not dirty: %v", kubeClient.Actions)
-	}
-}
-
-func TestPodHasRequests(t *testing.T) {
-	type testCase struct {
-		pod            *api.Pod
-		resourceName   api.ResourceName
-		expectedResult bool
-	}
-	testCases := []testCase{
-		{
-			pod:            validPod("request-cpu", 2, getResourceRequirements(getResourceList("100m", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceCPU,
-			expectedResult: true,
-		},
-		{
-			pod:            validPod("no-request-cpu", 2, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceCPU,
-			expectedResult: false,
-		},
-		{
-			pod:            validPod("request-zero-cpu", 2, getResourceRequirements(getResourceList("0", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceCPU,
-			expectedResult: false,
-		},
-		{
-			pod:            validPod("request-memory", 2, getResourceRequirements(getResourceList("", "2Mi"), getResourceList("", ""))),
-			resourceName:   api.ResourceMemory,
-			expectedResult: true,
-		},
-		{
-			pod:            validPod("no-request-memory", 2, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceMemory,
-			expectedResult: false,
-		},
-		{
-			pod:            validPod("request-zero-memory", 2, getResourceRequirements(getResourceList("", "0"), getResourceList("", ""))),
-			resourceName:   api.ResourceMemory,
-			expectedResult: false,
-		},
-	}
-	for _, item := range testCases {
-		if actual := PodHasRequests(item.pod, item.resourceName); item.expectedResult != actual {
-			t.Errorf("Pod %s for resource %s expected %v actual %v", item.pod.Name, item.resourceName, item.expectedResult, actual)
-		}
-	}
-}
-
-func TestPodRequests(t *testing.T) {
-	type testCase struct {
-		pod            *api.Pod
-		resourceName   api.ResourceName
-		expectedResult string
-		expectedError  bool
-	}
-	testCases := []testCase{
-		{
-			pod:            validPod("request-cpu", 2, getResourceRequirements(getResourceList("100m", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceCPU,
-			expectedResult: "200m",
-			expectedError:  false,
-		},
-		{
-			pod:            validPod("no-request-cpu", 2, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceCPU,
-			expectedResult: "",
-			expectedError:  true,
-		},
-		{
-			pod:            validPod("request-zero-cpu", 2, getResourceRequirements(getResourceList("0", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceCPU,
-			expectedResult: "",
-			expectedError:  true,
-		},
-		{
-			pod:            validPod("request-memory", 2, getResourceRequirements(getResourceList("", "500Mi"), getResourceList("", ""))),
-			resourceName:   api.ResourceMemory,
-			expectedResult: "1000Mi",
-			expectedError:  false,
-		},
-		{
-			pod:            validPod("no-request-memory", 2, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			resourceName:   api.ResourceMemory,
-			expectedResult: "",
-			expectedError:  true,
-		},
-		{
-			pod:            validPod("request-zero-memory", 2, getResourceRequirements(getResourceList("", "0"), getResourceList("", ""))),
-			resourceName:   api.ResourceMemory,
-			expectedResult: "",
-			expectedError:  true,
-		},
-	}
-	for _, item := range testCases {
-		actual, err := PodRequests(item.pod, item.resourceName)
-		if item.expectedError != (err != nil) {
-			t.Errorf("Unexpected error result for pod %s for resource %s expected error %v got %v", item.pod.Name, item.resourceName, item.expectedError, err)
-		}
-		if item.expectedResult != "" && (item.expectedResult != actual.String()) {
-			t.Errorf("Expected %s, Actual %s, pod %s for resource %s", item.expectedResult, actual.String(), item.pod.Name, item.resourceName)
-		}
-	}
-}
-
-func TestPodsRequests(t *testing.T) {
-	type testCase struct {
-		pods           []*api.Pod
-		resourceName   api.ResourceName
-		expectedResult string
-	}
-	testCases := []testCase{
-		{
-			pods: []*api.Pod{
-				validPod("request-cpu-1", 1, getResourceRequirements(getResourceList("100m", ""), getResourceList("", ""))),
-				validPod("request-cpu-2", 1, getResourceRequirements(getResourceList("1", ""), getResourceList("", ""))),
-			},
-			resourceName:   api.ResourceCPU,
-			expectedResult: "1100m",
-		},
-		{
-			pods: []*api.Pod{
-				validPod("no-request-cpu-1", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-				validPod("no-request-cpu-2", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			},
-			resourceName:   api.ResourceCPU,
-			expectedResult: "",
-		},
-		{
-			pods: []*api.Pod{
-				validPod("request-zero-cpu-1", 1, getResourceRequirements(getResourceList("0", ""), getResourceList("", ""))),
-				validPod("request-zero-cpu-1", 1, getResourceRequirements(getResourceList("0", ""), getResourceList("", ""))),
-			},
-			resourceName:   api.ResourceCPU,
-			expectedResult: "",
-		},
-		{
-			pods: []*api.Pod{
-				validPod("request-memory-1", 1, getResourceRequirements(getResourceList("", "500Mi"), getResourceList("", ""))),
-				validPod("request-memory-2", 1, getResourceRequirements(getResourceList("", "1Gi"), getResourceList("", ""))),
-			},
-			resourceName:   api.ResourceMemory,
-			expectedResult: "1524Mi",
-		},
-	}
-	for _, item := range testCases {
-		actual := PodsRequests(item.pods, item.resourceName)
-		if item.expectedResult != "" && (item.expectedResult != actual.String()) {
-			t.Errorf("Expected %s, Actual %s, pod %s for resource %s", item.expectedResult, actual.String(), item.pods[0].Name, item.resourceName)
-		}
+	expectedActionSet := sets.NewString(
+		strings.Join([]string{"list", "replicationcontrollers", ""}, "-"),
+		strings.Join([]string{"list", "services", ""}, "-"),
+		strings.Join([]string{"list", "pods", ""}, "-"),
+		strings.Join([]string{"list", "resourcequotas", ""}, "-"),
+		strings.Join([]string{"list", "secrets", ""}, "-"),
+		strings.Join([]string{"list", "persistentvolumeclaims", ""}, "-"),
+	)
+	actionSet := sets.NewString()
+	for _, action := range kubeClient.Actions() {
+		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
+	}
+	if !actionSet.HasAll(expectedActionSet.List()...) {
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
 	}
 }

plugin/pkg/admission/resourcequota/admission.go

@@ -20,35 +20,61 @@ import (
 	"fmt"
 	"io"
 	"math/rand"
+	"strings"
 	"time"
 
+	"github.com/hashicorp/golang-lru"
+
 	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 
 	"k8s.io/kubernetes/pkg/admission"
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/api/resource"
-	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/api/errors"
 	"k8s.io/kubernetes/pkg/client/cache"
-	resourcequotacontroller "k8s.io/kubernetes/pkg/controller/resourcequota"
+	"k8s.io/kubernetes/pkg/quota"
+	"k8s.io/kubernetes/pkg/quota/install"
 	"k8s.io/kubernetes/pkg/runtime"
-	utilerrors "k8s.io/kubernetes/pkg/util/errors"
 	"k8s.io/kubernetes/pkg/watch"
 )
 
 func init() {
-	admission.RegisterPlugin("ResourceQuota", func(client clientset.Interface, config io.Reader) (admission.Interface, error) {
-		return NewResourceQuota(client), nil
+	admission.RegisterPlugin("ResourceQuota",
+		func(client clientset.Interface, config io.Reader) (admission.Interface, error) {
+			registry := install.NewRegistry(client)
+			return NewResourceQuota(client, registry)
 		})
 }
 
-type quota struct {
+// quotaAdmission implements an admission controller that can enforce quota constraints
+type quotaAdmission struct {
 	*admission.Handler
+	// must be able to read/write ResourceQuota
 	client clientset.Interface
+	// indexer that holds quota objects by namespace
 	indexer cache.Indexer
+	// registry that knows how to measure usage for objects
+	registry quota.Registry
+
+	// liveLookups holds the last few live lookups we've done to help ammortize cost on repeated lookup failures.
+	// This let's us handle the case of latent caches, by looking up actual results for a namespace on cache miss/no results.
+	// We track the lookup result here so that for repeated requests, we don't look it up very often.
+	liveLookupCache *lru.Cache
+	liveTTL         time.Duration
 }
 
-// NewResourceQuota creates a new resource quota admission control handler
-func NewResourceQuota(client clientset.Interface) admission.Interface {
+type liveLookupEntry struct {
+	expiry time.Time
+	items  []*api.ResourceQuota
+}
+
+// NewResourceQuota configures an admission controller that can enforce quota constraints
+// using the provided registry.  The registry must have the capability to handle group/kinds that
+// are persisted by the server this admission controller is intercepting
+func NewResourceQuota(client clientset.Interface, registry quota.Registry) (admission.Interface, error) {
+	liveLookupCache, err := lru.New(100)
+	if err != nil {
+		return nil, err
+	}
 	lw := &cache.ListWatch{
 		ListFunc: func(options api.ListOptions) (runtime.Object, error) {
 			return client.Core().ResourceQuotas(api.NamespaceAll).List(options)
@@ -59,213 +85,214 @@ func NewResourceQuota(client clientset.Interface) admission.Interface {
 	}
 	indexer, reflector := cache.NewNamespaceKeyedIndexerAndReflector(lw, &api.ResourceQuota{}, 0)
 	reflector.Run()
-	return createResourceQuota(client, indexer)
-}
-
-func createResourceQuota(client clientset.Interface, indexer cache.Indexer) admission.Interface {
-	return &quota{
+	return &quotaAdmission{
 		Handler:         admission.NewHandler(admission.Create, admission.Update),
 		client:          client,
 		indexer:         indexer,
-	}
+		registry:        registry,
+		liveLookupCache: liveLookupCache,
+		liveTTL:         time.Duration(30 * time.Second),
+	}, nil
 }
 
-var resourceToResourceName = map[unversioned.GroupResource]api.ResourceName{
-	api.Resource("pods"):                   api.ResourcePods,
-	api.Resource("services"):               api.ResourceServices,
-	api.Resource("replicationcontrollers"): api.ResourceReplicationControllers,
-	api.Resource("resourcequotas"):         api.ResourceQuotas,
-	api.Resource("secrets"):                api.ResourceSecrets,
-	api.Resource("persistentvolumeclaims"): api.ResourcePersistentVolumeClaims,
-}
-
-func (q *quota) Admit(a admission.Attributes) (err error) {
+// Admit makes admission decisions while enforcing quota
+func (q *quotaAdmission) Admit(a admission.Attributes) (err error) {
+	// ignore all operations that correspond to sub-resource actions
 	if a.GetSubresource() != "" {
 		return nil
 	}
 
-	if a.GetOperation() == "DELETE" {
+	// if we do not know how to evaluate use for this kind, just ignore
+	evaluators := q.registry.Evaluators()
+	evaluator, found := evaluators[a.GetKind()]
+	if !found {
 		return nil
 	}
 
-	key := &api.ResourceQuota{
-		ObjectMeta: api.ObjectMeta{
-			Namespace: a.GetNamespace(),
-			Name:      "",
-		},
+	// for this kind, check if the operation could mutate any quota resources
+	// if no resources tracked by quota are impacted, then just return
+	op := a.GetOperation()
+	operationResources := evaluator.OperationResources(op)
+	if len(operationResources) == 0 {
+		return nil
 	}
 
-	// concurrent operations that modify quota tracked resources can cause a conflict when incrementing usage
-	// as a result, we will attempt to increment quota usage per request up to numRetries limit
-	// we fuzz each retry with an interval period to attempt to improve end-user experience during concurrent operations
-	numRetries := 10
-	interval := time.Duration(rand.Int63n(90)+int64(10)) * time.Millisecond
-
-	items, err := q.indexer.Index("namespace", key)
+	// determine if there are any quotas in this namespace
+	// if there are no quotas, we don't need to do anything
+	namespace, name := a.GetNamespace(), a.GetName()
+	items, err := q.indexer.Index("namespace", &api.ResourceQuota{ObjectMeta: api.ObjectMeta{Namespace: namespace, Name: ""}})
 	if err != nil {
-		return admission.NewForbidden(a, fmt.Errorf("unable to %s %s at this time because there was an error enforcing quota", a.GetOperation(), a.GetResource()))
+		return admission.NewForbidden(a, fmt.Errorf("Error resolving quota."))
 	}
+	// if there are no items held in our indexer, check our live-lookup LRU, if that misses, do the live lookup to prime it.
+	if len(items) == 0 {
+		lruItemObj, ok := q.liveLookupCache.Get(a.GetNamespace())
+		if !ok || lruItemObj.(liveLookupEntry).expiry.Before(time.Now()) {
+			liveList, err := q.client.Core().ResourceQuotas(namespace).List(api.ListOptions{})
+			if err != nil {
+				return admission.NewForbidden(a, err)
+			}
+			newEntry := liveLookupEntry{expiry: time.Now().Add(q.liveTTL)}
+			for i := range liveList.Items {
+				newEntry.items = append(newEntry.items, &liveList.Items[i])
+			}
+			q.liveLookupCache.Add(a.GetNamespace(), newEntry)
+			lruItemObj = newEntry
+		}
+		lruEntry := lruItemObj.(liveLookupEntry)
+		for i := range lruEntry.items {
+			items = append(items, lruEntry.items[i])
+		}
+	}
+	// if there are still no items, we can return
 	if len(items) == 0 {
 		return nil
 	}
 
+	// find the set of quotas that are pertinent to this request
+	// reject if we match the quota, but usage is not calculated yet
+	// reject if the input object does not satisfy quota constraints
+	// if there are no pertinent quotas, we can just return
+	inputObject := a.GetObject()
+	resourceQuotas := []*api.ResourceQuota{}
 	for i := range items {
-
-		quota := items[i].(*api.ResourceQuota)
-
-		for retry := 1; retry <= numRetries; retry++ {
-
-			// we cannot modify the value directly in the cache, so we copy
-			status := &api.ResourceQuotaStatus{
-				Hard: api.ResourceList{},
-				Used: api.ResourceList{},
+		resourceQuota := items[i].(*api.ResourceQuota)
+		match := evaluator.Matches(resourceQuota, inputObject)
+		if !match {
+			continue
 		}
-			for k, v := range quota.Status.Hard {
-				status.Hard[k] = *v.Copy()
-			}
-			for k, v := range quota.Status.Used {
-				status.Used[k] = *v.Copy()
-			}
-
-			dirty, err := IncrementUsage(a, status, q.client)
+		hardResources := quota.ResourceNames(resourceQuota.Status.Hard)
+		evaluatorResources := evaluator.MatchesResources()
+		requiredResources := quota.Intersection(hardResources, evaluatorResources)
+		err := evaluator.Constraints(requiredResources, inputObject)
 		if err != nil {
-				return admission.NewForbidden(a, err)
+			return admission.NewForbidden(a, fmt.Errorf("Failed quota: %s: %v", resourceQuota.Name, err))
+		}
+		if !hasUsageStats(resourceQuota) {
+			return admission.NewForbidden(a, fmt.Errorf("Status unknown for quota: %s", resourceQuota.Name))
+		}
+		resourceQuotas = append(resourceQuotas, resourceQuota)
+	}
+	if len(resourceQuotas) == 0 {
+		return nil
 	}
 
-			if dirty {
-				// construct a usage record
-				usage := api.ResourceQuota{
-					ObjectMeta: api.ObjectMeta{
-						Name:            quota.Name,
-						Namespace:       quota.Namespace,
-						ResourceVersion: quota.ResourceVersion,
-						Labels:          quota.Labels,
-						Annotations:     quota.Annotations},
+	// there is at least one quota that definitely matches our object
+	// as a result, we need to measure the usage of this object for quota
+	// on updates, we need to subtract the previous measured usage
+	// if usage shows no change, just return since it has no impact on quota
+	deltaUsage := evaluator.Usage(inputObject)
+	if admission.Update == op {
+		prevItem, err := evaluator.Get(namespace, name)
+		if err != nil {
+			return admission.NewForbidden(a, fmt.Errorf("Unable to get previous: %v", err))
 		}
-				usage.Status = *status
-				_, err = q.client.Core().ResourceQuotas(usage.Namespace).UpdateStatus(&usage)
-				if err == nil {
-					break
+		prevUsage := evaluator.Usage(prevItem)
+		deltaUsage = quota.Subtract(deltaUsage, prevUsage)
+	}
+	if quota.IsZero(deltaUsage) {
+		return nil
+	}
+
+	// TODO: Move to a bucketing work queue
+	// If we guaranteed that we processed the request in order it was received to server, we would reduce quota conflicts.
+	// Until we have the bucketing work queue, we jitter requests and retry on conflict.
+	numRetries := 10
+	interval := time.Duration(rand.Int63n(90)+int64(10)) * time.Millisecond
+
+	// seed the retry loop with the initial set of quotas to process (should reduce each iteration)
+	resourceQuotasToProcess := resourceQuotas
+	for retry := 1; retry <= numRetries; retry++ {
+		// the list of quotas we will try again if there is a version conflict
+		tryAgain := []*api.ResourceQuota{}
+
+		// check that we pass all remaining quotas so we do not prematurely charge
+		// for each quota, mask the usage to the set of resources tracked by the quota
+		// if request + used < hard, return an error describing the failure
+		updatedUsage := map[string]api.ResourceList{}
+		for _, resourceQuota := range resourceQuotasToProcess {
+			hardResources := quota.ResourceNames(resourceQuota.Status.Hard)
+			requestedUsage := quota.Mask(deltaUsage, hardResources)
+			newUsage := quota.Add(resourceQuota.Status.Used, requestedUsage)
+			if allowed, exceeded := quota.LessThanOrEqual(newUsage, resourceQuota.Status.Hard); !allowed {
+				failedRequestedUsage := quota.Mask(requestedUsage, exceeded)
+				failedUsed := quota.Mask(resourceQuota.Status.Used, exceeded)
+				failedHard := quota.Mask(resourceQuota.Status.Hard, exceeded)
+				return admission.NewForbidden(a,
+					fmt.Errorf("Exceeded quota: %s, requested: %s, used: %s, limited: %s",
+						resourceQuota.Name,
+						prettyPrint(failedRequestedUsage),
+						prettyPrint(failedUsed),
+						prettyPrint(failedHard)))
+			}
+			updatedUsage[resourceQuota.Name] = newUsage
+		}
+
+		// update the status for each quota with its new usage
+		// if we get a conflict, get updated quota, and enqueue
+		for _, resourceQuota := range resourceQuotasToProcess {
+			newUsage := updatedUsage[resourceQuota.Name]
+			quotaToUpdate := &api.ResourceQuota{
+				ObjectMeta: api.ObjectMeta{
+					Name:            resourceQuota.Name,
+					Namespace:       resourceQuota.Namespace,
+					ResourceVersion: resourceQuota.ResourceVersion,
+				},
+				Status: api.ResourceQuotaStatus{
+					Hard: quota.Add(api.ResourceList{}, resourceQuota.Status.Hard),
+					Used: newUsage,
+				},
+			}
+			_, err = q.client.Core().ResourceQuotas(quotaToUpdate.Namespace).UpdateStatus(quotaToUpdate)
+			if err != nil {
+				if !errors.IsConflict(err) {
+					return admission.NewForbidden(a, fmt.Errorf("Unable to update quota status: %s %v", resourceQuota.Name, err))
+				}
+				latestQuota, err := q.client.Core().ResourceQuotas(namespace).Get(resourceQuota.Name)
+				if err != nil {
+					return admission.NewForbidden(a, fmt.Errorf("Unable to get quota: %s %v", resourceQuota.Name, err))
+				}
+				tryAgain = append(tryAgain, latestQuota)
+			}
+		}
+
+		// all quotas were updated, so we can return
+		if len(tryAgain) == 0 {
+			return nil
 		}
 
 		// we have concurrent requests to update quota, so look to retry if needed
+		// next iteration, we need to process the items that have to try again
+		// pause the specified interval to encourage jitter
 		if retry == numRetries {
-					return admission.NewForbidden(a, fmt.Errorf("unable to %s %s at this time because there are too many concurrent requests to increment quota", a.GetOperation(), a.GetResource()))
+			names := []string{}
+			for _, quota := range tryAgain {
+				names = append(names, quota.Name)
 			}
+			return admission.NewForbidden(a, fmt.Errorf("Unable to update status for quota: %s, ", strings.Join(names, ",")))
+		}
+		resourceQuotasToProcess = tryAgain
 		time.Sleep(interval)
-				// manually get the latest quota
-				quota, err = q.client.Core().ResourceQuotas(usage.Namespace).Get(quota.Name)
-				if err != nil {
-					return admission.NewForbidden(a, err)
-				}
-			}
-		}
 	}
 	return nil
 }
 
-// IncrementUsage updates the supplied ResourceQuotaStatus object based on the incoming operation
-// Return true if the usage must be recorded prior to admitting the new resource
-// Return an error if the operation should not pass admission control
-func IncrementUsage(a admission.Attributes, status *api.ResourceQuotaStatus, client clientset.Interface) (bool, error) {
-	// on update, the only resource that can modify the value of a quota is pods
-	// so if your not a pod, we exit quickly
-	if a.GetOperation() == admission.Update && a.GetResource() != api.Resource("pods") {
-		return false, nil
+// prettyPrint formats a resource list for usage in errors
+func prettyPrint(item api.ResourceList) string {
+	parts := []string{}
+	for key, value := range item {
+		constraint := string(key) + "=" + value.String()
+		parts = append(parts, constraint)
 	}
-
-	var errs []error
-	dirty := true
-	set := map[api.ResourceName]bool{}
-	for k := range status.Hard {
-		set[k] = true
-	}
-	obj := a.GetObject()
-	// handle max counts for each kind of resource (pods, services, replicationControllers, etc.)
-	if a.GetOperation() == admission.Create {
-		resourceName := resourceToResourceName[a.GetResource()]
-		hard, hardFound := status.Hard[resourceName]
-		if hardFound {
-			used, usedFound := status.Used[resourceName]
-			if !usedFound {
-				return false, fmt.Errorf("quota usage stats are not yet known, unable to admit resource until an accurate count is completed.")
-			}
-			if used.Value() >= hard.Value() {
-				errs = append(errs, fmt.Errorf("limited to %s %s", hard.String(), resourceName))
-				dirty = false
-			} else {
-				status.Used[resourceName] = *resource.NewQuantity(used.Value()+int64(1), resource.DecimalSI)
-			}
-		}
-	}
-
-	if a.GetResource() == api.Resource("pods") {
-		for _, resourceName := range []api.ResourceName{api.ResourceMemory, api.ResourceCPU} {
-
-			// ignore tracking the resource if it's not in the quota document
-			if !set[resourceName] {
-				continue
-			}
-
-			hard, hardFound := status.Hard[resourceName]
-			if !hardFound {
-				continue
-			}
-
-			// if we do not yet know how much of the current resource is used, we cannot accept any request
-			used, usedFound := status.Used[resourceName]
-			if !usedFound {
-				return false, fmt.Errorf("unable to admit pod until quota usage stats are calculated.")
-			}
-
-			// the amount of resource being requested, or an error if it does not make a request that is tracked
-			pod := obj.(*api.Pod)
-			delta, err := resourcequotacontroller.PodRequests(pod, resourceName)
-
-			if err != nil {
-				return false, fmt.Errorf("%s is limited by quota, must make explicit request.", resourceName)
-			}
-
-			// if this operation is an update, we need to find the delta usage from the previous state
-			if a.GetOperation() == admission.Update {
-				oldPod, err := client.Core().Pods(a.GetNamespace()).Get(pod.Name)
-				if err != nil {
-					return false, err
-				}
-
-				// if the previous version of the resource made a resource request, we need to subtract the old request
-				// from the current to get the actual resource request delta.  if the previous version of the pod
-				// made no request on the resource, then we get an err value.  we ignore the err value, and delta
-				// will just be equal to the total resource request on the pod since there is nothing to subtract.
-				oldRequest, err := resourcequotacontroller.PodRequests(oldPod, resourceName)
-				if err == nil {
-					err = delta.Sub(*oldRequest)
-					if err != nil {
-						return false, err
-					}
-				}
-			}
-
-			newUsage := used.Copy()
-			newUsage.Add(*delta)
-
-			// make the most precise comparison possible
-			newUsageValue := newUsage.Value()
-			hardUsageValue := hard.Value()
-			if newUsageValue <= resource.MaxMilliValue && hardUsageValue <= resource.MaxMilliValue {
-				newUsageValue = newUsage.MilliValue()
-				hardUsageValue = hard.MilliValue()
-			}
-
-			if newUsageValue > hardUsageValue {
-				errs = append(errs, fmt.Errorf("%s quota is %s, current usage is %s, requesting %s.", resourceName, hard.String(), used.String(), delta.String()))
-				dirty = false
-			} else {
-				status.Used[resourceName] = *newUsage
-			}
-
-		}
-	}
-
-	return dirty, utilerrors.NewAggregate(errs)
+	return strings.Join(parts, ",")
+}
+
+// hasUsageStats returns true if for each hard constraint there is a value for its current usage
+func hasUsageStats(resourceQuota *api.ResourceQuota) bool {
+	for resourceName := range resourceQuota.Status.Hard {
+		if _, found := resourceQuota.Status.Used[resourceName]; !found {
+			return false
+		}
+	}
+	return true
 }

plugin/pkg/admission/resourcequota/admission_test.go

@@ -18,16 +18,20 @@ package resourcequota
 
 import (
 	"strconv"
+	"strings"
 	"testing"
+	"time"
+
+	"github.com/hashicorp/golang-lru"
 
 	"k8s.io/kubernetes/pkg/admission"
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/resource"
-	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/client/cache"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
-	resourcequotacontroller "k8s.io/kubernetes/pkg/controller/resourcequota"
-	"k8s.io/kubernetes/pkg/runtime"
+	"k8s.io/kubernetes/pkg/client/unversioned/testclient"
+	"k8s.io/kubernetes/pkg/quota/install"
+	"k8s.io/kubernetes/pkg/util/sets"
 )
 
 func getResourceList(cpu, memory string) api.ResourceList {
@@ -63,386 +67,502 @@ func validPod(name string, numContainers int, resources api.ResourceRequirements
 	return pod
 }
 
+// TestAdmissionIgnoresDelete verifies that the admission controller ignores delete operations
 func TestAdmissionIgnoresDelete(t *testing.T) {
+	kubeClient := fake.NewSimpleClientset()
+	handler, err := NewResourceQuota(kubeClient, install.NewRegistry(kubeClient))
+	if err != nil {
+		t.Errorf("Unexpected error %v", err)
+	}
 	namespace := "default"
-	handler := createResourceQuota(&fake.Clientset{}, nil)
-	err := handler.Admit(admission.NewAttributesRecord(nil, api.Kind("Pod"), namespace, "name", api.Resource("pods"), "", admission.Delete, nil))
+	err = handler.Admit(admission.NewAttributesRecord(nil, api.Kind("Pod"), namespace, "name", api.Resource("pods"), "", admission.Delete, nil))
 	if err != nil {
 		t.Errorf("ResourceQuota should admit all deletes: %v", err)
 	}
 }
 
+// TestAdmissionIgnoresSubresources verifies that the admission controller ignores subresources
+// It verifies that creation of a pod that would have exceeded quota is properly failed
+// It verifies that create operations to a subresource that would have exceeded quota would succeed
 func TestAdmissionIgnoresSubresources(t *testing.T) {
-	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
-	handler := createResourceQuota(&fake.Clientset{}, indexer)
-
-	quota := &api.ResourceQuota{}
-	quota.Name = "quota"
-	quota.Namespace = "test"
-	quota.Status = api.ResourceQuotaStatus{
+	resourceQuota := &api.ResourceQuota{}
+	resourceQuota.Name = "quota"
+	resourceQuota.Namespace = "test"
+	resourceQuota.Status = api.ResourceQuotaStatus{
 		Hard: api.ResourceList{},
 		Used: api.ResourceList{},
 	}
-	quota.Status.Hard[api.ResourceMemory] = resource.MustParse("2Gi")
-	quota.Status.Used[api.ResourceMemory] = resource.MustParse("1Gi")
-
-	indexer.Add(quota)
-
+	resourceQuota.Status.Hard[api.ResourceMemory] = resource.MustParse("2Gi")
+	resourceQuota.Status.Used[api.ResourceMemory] = resource.MustParse("1Gi")
+	kubeClient := fake.NewSimpleClientset(resourceQuota)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
+	}
+	handler.indexer.Add(resourceQuota)
 	newPod := validPod("123", 1, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("", "")))
 	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
 	if err == nil {
 		t.Errorf("Expected an error because the pod exceeded allowed quota")
 	}
-
 	err = handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "subresource", admission.Create, nil))
 	if err != nil {
 		t.Errorf("Did not expect an error because the action went to a subresource: %v", err)
 	}
-
 }
 
-func TestIncrementUsagePodResources(t *testing.T) {
-	type testCase struct {
-		testName      string
-		existing      *api.Pod
-		input         *api.Pod
-		resourceName  api.ResourceName
-		hard          resource.Quantity
-		expectedUsage resource.Quantity
-		expectedError bool
-	}
-	testCases := []testCase{
-		{
-			testName:      "memory-allowed",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("", "100Mi"), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("", "100Mi"), getResourceList("", ""))),
-			resourceName:  api.ResourceMemory,
-			hard:          resource.MustParse("500Mi"),
-			expectedUsage: resource.MustParse("200Mi"),
-			expectedError: false,
+// TestAdmitBelowQuotaLimit verifies that a pod when created has its usage reflected on the quota
+func TestAdmitBelowQuotaLimit(t *testing.T) {
+	resourceQuota := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota", Namespace: "test", ResourceVersion: "124"},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("3"),
+				api.ResourceMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:   resource.MustParse("5"),
 			},
-		{
-			testName:      "memory-not-allowed",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("", "100Mi"), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("", "450Mi"), getResourceList("", ""))),
-			resourceName:  api.ResourceMemory,
-			hard:          resource.MustParse("500Mi"),
-			expectedError: true,
+			Used: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("1"),
+				api.ResourceMemory: resource.MustParse("50Gi"),
+				api.ResourcePods:   resource.MustParse("3"),
 			},
-		{
-			testName:      "memory-not-allowed-with-different-format",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("", "100M"), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("", "450Mi"), getResourceList("", ""))),
-			resourceName:  api.ResourceMemory,
-			hard:          resource.MustParse("500Mi"),
-			expectedError: true,
-		},
-		{
-			testName:      "memory-no-request",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("", "100Mi"), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			resourceName:  api.ResourceMemory,
-			hard:          resource.MustParse("500Mi"),
-			expectedError: true,
-		},
-		{
-			testName:      "cpu-allowed",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("1", ""), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("1", ""), getResourceList("", ""))),
-			resourceName:  api.ResourceCPU,
-			hard:          resource.MustParse("2"),
-			expectedUsage: resource.MustParse("2"),
-			expectedError: false,
-		},
-		{
-			testName:      "cpu-not-allowed",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("1", ""), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("600m", ""), getResourceList("", ""))),
-			resourceName:  api.ResourceCPU,
-			hard:          resource.MustParse("1500m"),
-			expectedError: true,
-		},
-		{
-			testName:      "cpu-no-request",
-			existing:      validPod("a", 1, getResourceRequirements(getResourceList("1", ""), getResourceList("", ""))),
-			input:         validPod("b", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", ""))),
-			resourceName:  api.ResourceCPU,
-			hard:          resource.MustParse("1500m"),
-			expectedError: true,
 		},
 	}
-	for _, item := range testCases {
-		podList := &api.PodList{Items: []api.Pod{*item.existing}}
-		client := fake.NewSimpleClientset(podList)
-		status := &api.ResourceQuotaStatus{
-			Hard: api.ResourceList{},
-			Used: api.ResourceList{},
+	kubeClient := fake.NewSimpleClientset(resourceQuota)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
 	}
-		used, err := resourcequotacontroller.PodRequests(item.existing, item.resourceName)
-		if err != nil {
-			t.Errorf("Test %s, unexpected error %v", item.testName, err)
-		}
-		status.Hard[item.resourceName] = item.hard
-		status.Used[item.resourceName] = *used
-
-		dirty, err := IncrementUsage(admission.NewAttributesRecord(item.input, api.Kind("Pod"), item.input.Namespace, item.input.Name, api.Resource("pods"), "", admission.Create, nil), status, client)
-		if err == nil && item.expectedError {
-			t.Errorf("Test %s, expected error", item.testName)
-		}
-		if err != nil && !item.expectedError {
-			t.Errorf("Test %s, unexpected error", err)
-		}
-		if !item.expectedError {
-			if !dirty {
-				t.Errorf("Test %s, expected the quota to be dirty", item.testName)
-			}
-			quantity := status.Used[item.resourceName]
-			if quantity.String() != item.expectedUsage.String() {
-				t.Errorf("Test %s, expected usage %s, actual usage %s", item.testName, item.expectedUsage.String(), quantity.String())
-			}
-		}
-	}
-}
-
-func TestIncrementUsagePods(t *testing.T) {
-	pod := validPod("123", 1, getResourceRequirements(getResourceList("100m", "1Gi"), getResourceList("", "")))
-	podList := &api.PodList{Items: []api.Pod{*pod}}
-	client := fake.NewSimpleClientset(podList)
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
-	}
-	r := api.ResourcePods
-	status.Hard[r] = resource.MustParse("2")
-	status.Used[r] = resource.MustParse("1")
-	dirty, err := IncrementUsage(admission.NewAttributesRecord(&api.Pod{}, api.Kind("Pod"), pod.Namespace, "new-pod", api.Resource("pods"), "", admission.Create, nil), status, client)
+	handler.indexer.Add(resourceQuota)
+	newPod := validPod("allowed-pod", 1, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("", "")))
+	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
 	if err != nil {
 		t.Errorf("Unexpected error: %v", err)
 	}
-	if !dirty {
-		t.Errorf("Expected the status to get incremented, therefore should have been dirty")
+	if len(kubeClient.Actions()) == 0 {
+		t.Errorf("Expected a client action")
+	}
+
+	expectedActionSet := sets.NewString(
+		strings.Join([]string{"update", "resourcequotas", "status"}, "-"),
+	)
+	actionSet := sets.NewString()
+	for _, action := range kubeClient.Actions() {
+		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
+	}
+	if !actionSet.HasAll(expectedActionSet.List()...) {
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
+	}
+
+	lastActionIndex := len(kubeClient.Actions()) - 1
+	usage := kubeClient.Actions()[lastActionIndex].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
+	expectedUsage := api.ResourceQuota{
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("3"),
+				api.ResourceMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:   resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("1100m"),
+				api.ResourceMemory: resource.MustParse("52Gi"),
+				api.ResourcePods:   resource.MustParse("4"),
+			},
+		},
+	}
+	for k, v := range expectedUsage.Status.Used {
+		actual := usage.Status.Used[k]
+		actualValue := actual.String()
+		expectedValue := v.String()
+		if expectedValue != actualValue {
+			t.Errorf("Usage Used: Key: %v, Expected: %v, Actual: %v", k, expectedValue, actualValue)
 		}
-	quantity := status.Used[r]
-	if quantity.Value() != int64(2) {
-		t.Errorf("Expected new item count to be 2, but was %s", quantity.String())
 	}
 }
 
-func TestExceedUsagePods(t *testing.T) {
-	pod := validPod("123", 1, getResourceRequirements(getResourceList("100m", "1Gi"), getResourceList("", "")))
-	podList := &api.PodList{Items: []api.Pod{*pod}}
-	client := fake.NewSimpleClientset(podList)
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
+// TestAdmitExceedQuotaLimit verifies that if a pod exceeded allowed usage that its rejected during admission.
+func TestAdmitExceedQuotaLimit(t *testing.T) {
+	resourceQuota := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota", Namespace: "test", ResourceVersion: "124"},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("3"),
+				api.ResourceMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:   resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("1"),
+				api.ResourceMemory: resource.MustParse("50Gi"),
+				api.ResourcePods:   resource.MustParse("3"),
+			},
+		},
 	}
-	r := api.ResourcePods
-	status.Hard[r] = resource.MustParse("1")
-	status.Used[r] = resource.MustParse("1")
-	_, err := IncrementUsage(admission.NewAttributesRecord(&api.Pod{}, api.Kind("Pod"), pod.Namespace, "name", api.Resource("pods"), "", admission.Create, nil), status, client)
+	kubeClient := fake.NewSimpleClientset(resourceQuota)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
+	}
+	handler.indexer.Add(resourceQuota)
+	newPod := validPod("not-allowed-pod", 1, getResourceRequirements(getResourceList("3", "2Gi"), getResourceList("", "")))
+	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
 	if err == nil {
-		t.Errorf("Expected error because this would exceed your quota")
+		t.Errorf("Expected an error exceeding quota")
 	}
 }
 
-func TestIncrementUsageServices(t *testing.T) {
-	namespace := "default"
-	client := fake.NewSimpleClientset(&api.ServiceList{
-		Items: []api.Service{
-			{
-				ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
+// TestAdmitEnforceQuotaConstraints verifies that if a quota tracks a particular resource that that resource is
+// specified on the pod.  In this case, we create a quota that tracks cpu request, memory request, and memory limit.
+// We ensure that a pod that does not specify a memory limit that it fails in admission.
+func TestAdmitEnforceQuotaConstraints(t *testing.T) {
+	resourceQuota := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota", Namespace: "test", ResourceVersion: "124"},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:          resource.MustParse("3"),
+				api.ResourceMemory:       resource.MustParse("100Gi"),
+				api.ResourceLimitsMemory: resource.MustParse("200Gi"),
+				api.ResourcePods:         resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:          resource.MustParse("1"),
+				api.ResourceMemory:       resource.MustParse("50Gi"),
+				api.ResourceLimitsMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:         resource.MustParse("3"),
 			},
 		},
-	})
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
 	}
-	r := api.ResourceServices
-	status.Hard[r] = resource.MustParse("2")
-	status.Used[r] = resource.MustParse("1")
-	dirty, err := IncrementUsage(admission.NewAttributesRecord(&api.Service{}, api.Kind("Service"), namespace, "name", api.Resource("services"), "", admission.Create, nil), status, client)
+	kubeClient := fake.NewSimpleClientset(resourceQuota)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
+	}
+	handler.indexer.Add(resourceQuota)
+	newPod := validPod("not-allowed-pod", 1, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("200m", "")))
+	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
+	if err == nil {
+		t.Errorf("Expected an error because the pod does not specify a memory limit")
+	}
+}
+
+// TestAdmitPodInNamespaceWithoutQuota ensures that if a namespace has no quota, that a pod can get in
+func TestAdmitPodInNamespaceWithoutQuota(t *testing.T) {
+	resourceQuota := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota", Namespace: "other", ResourceVersion: "124"},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:          resource.MustParse("3"),
+				api.ResourceMemory:       resource.MustParse("100Gi"),
+				api.ResourceLimitsMemory: resource.MustParse("200Gi"),
+				api.ResourcePods:         resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:          resource.MustParse("1"),
+				api.ResourceMemory:       resource.MustParse("50Gi"),
+				api.ResourceLimitsMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:         resource.MustParse("3"),
+			},
+		},
+	}
+	kubeClient := fake.NewSimpleClientset(resourceQuota)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	liveLookupCache, err := lru.New(100)
+	if err != nil {
+		t.Fatal(err)
+	}
+	handler := &quotaAdmission{
+		Handler:         admission.NewHandler(admission.Create, admission.Update),
+		client:          kubeClient,
+		indexer:         indexer,
+		registry:        install.NewRegistry(kubeClient),
+		liveLookupCache: liveLookupCache,
+	}
+	// Add to the index
+	handler.indexer.Add(resourceQuota)
+	newPod := validPod("not-allowed-pod", 1, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("200m", "")))
+	// Add to the lru cache so we do not do a live client lookup
+	liveLookupCache.Add(newPod.Namespace, liveLookupEntry{expiry: time.Now().Add(time.Duration(30 * time.Second)), items: []*api.ResourceQuota{}})
+	err = handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
+	if err != nil {
+		t.Errorf("Did not expect an error because the pod is in a different namespace than the quota")
+	}
+}
+
+// TestAdmitBelowTerminatingQuotaLimit ensures that terminating pods are charged to the right quota.
+// It creates a terminating and non-terminating quota, and creates a terminating pod.
+// It ensures that the terminating quota is incremented, and the non-terminating quota is not.
+func TestAdmitBelowTerminatingQuotaLimit(t *testing.T) {
+	resourceQuotaNonTerminating := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota-non-terminating", Namespace: "test", ResourceVersion: "124"},
+		Spec: api.ResourceQuotaSpec{
+			Scopes: []api.ResourceQuotaScope{api.ResourceQuotaScopeNotTerminating},
+		},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("3"),
+				api.ResourceMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:   resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("1"),
+				api.ResourceMemory: resource.MustParse("50Gi"),
+				api.ResourcePods:   resource.MustParse("3"),
+			},
+		},
+	}
+	resourceQuotaTerminating := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota-terminating", Namespace: "test", ResourceVersion: "124"},
+		Spec: api.ResourceQuotaSpec{
+			Scopes: []api.ResourceQuotaScope{api.ResourceQuotaScopeTerminating},
+		},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("3"),
+				api.ResourceMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:   resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("1"),
+				api.ResourceMemory: resource.MustParse("50Gi"),
+				api.ResourcePods:   resource.MustParse("3"),
+			},
+		},
+	}
+	kubeClient := fake.NewSimpleClientset(resourceQuotaTerminating, resourceQuotaNonTerminating)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
+	}
+	handler.indexer.Add(resourceQuotaNonTerminating)
+	handler.indexer.Add(resourceQuotaTerminating)
+
+	// create a pod that has an active deadline
+	newPod := validPod("allowed-pod", 1, getResourceRequirements(getResourceList("100m", "2Gi"), getResourceList("", "")))
+	activeDeadlineSeconds := int64(30)
+	newPod.Spec.ActiveDeadlineSeconds = &activeDeadlineSeconds
+	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
 	if err != nil {
 		t.Errorf("Unexpected error: %v", err)
 	}
-	if !dirty {
-		t.Errorf("Expected the status to get incremented, therefore should have been dirty")
+	if len(kubeClient.Actions()) == 0 {
+		t.Errorf("Expected a client action")
+	}
+
+	expectedActionSet := sets.NewString(
+		strings.Join([]string{"update", "resourcequotas", "status"}, "-"),
+	)
+	actionSet := sets.NewString()
+	for _, action := range kubeClient.Actions() {
+		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
+	}
+	if !actionSet.HasAll(expectedActionSet.List()...) {
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
+	}
+
+	lastActionIndex := len(kubeClient.Actions()) - 1
+	usage := kubeClient.Actions()[lastActionIndex].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
+
+	// ensure only the quota-terminating was updated
+	if usage.Name != resourceQuotaTerminating.Name {
+		t.Errorf("Incremented the wrong quota, expected %v, actual %v", resourceQuotaTerminating.Name, usage.Name)
+	}
+
+	expectedUsage := api.ResourceQuota{
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("3"),
+				api.ResourceMemory: resource.MustParse("100Gi"),
+				api.ResourcePods:   resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourceCPU:    resource.MustParse("1100m"),
+				api.ResourceMemory: resource.MustParse("52Gi"),
+				api.ResourcePods:   resource.MustParse("4"),
+			},
+		},
+	}
+	for k, v := range expectedUsage.Status.Used {
+		actual := usage.Status.Used[k]
+		actualValue := actual.String()
+		expectedValue := v.String()
+		if expectedValue != actualValue {
+			t.Errorf("Usage Used: Key: %v, Expected: %v, Actual: %v", k, expectedValue, actualValue)
 		}
-	quantity := status.Used[r]
-	if quantity.Value() != int64(2) {
-		t.Errorf("Expected new item count to be 2, but was %s", quantity.String())
 	}
 }
 
-func TestExceedUsageServices(t *testing.T) {
-	namespace := "default"
-	client := fake.NewSimpleClientset(&api.ServiceList{
-		Items: []api.Service{
-			{
-				ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
+// TestAdmitBelowBestEffortQuotaLimit creates a best effort and non-best effort quota.
+// It verifies that best effort pods are properly scoped to the best effort quota document.
+func TestAdmitBelowBestEffortQuotaLimit(t *testing.T) {
+	resourceQuotaBestEffort := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota-besteffort", Namespace: "test", ResourceVersion: "124"},
+		Spec: api.ResourceQuotaSpec{
+			Scopes: []api.ResourceQuotaScope{api.ResourceQuotaScopeBestEffort},
+		},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourcePods: resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourcePods: resource.MustParse("3"),
 			},
 		},
-	})
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
 	}
-	r := api.ResourceServices
-	status.Hard[r] = resource.MustParse("1")
-	status.Used[r] = resource.MustParse("1")
-	_, err := IncrementUsage(admission.NewAttributesRecord(&api.Service{}, api.Kind("Service"), namespace, "name", api.Resource("services"), "", admission.Create, nil), status, client)
-	if err == nil {
-		t.Errorf("Expected error because this would exceed usage")
+	resourceQuotaNotBestEffort := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota-not-besteffort", Namespace: "test", ResourceVersion: "124"},
+		Spec: api.ResourceQuotaSpec{
+			Scopes: []api.ResourceQuotaScope{api.ResourceQuotaScopeNotBestEffort},
+		},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourcePods: resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourcePods: resource.MustParse("3"),
+			},
+		},
 	}
-}
+	kubeClient := fake.NewSimpleClientset(resourceQuotaBestEffort, resourceQuotaNotBestEffort)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
+	}
+	handler.indexer.Add(resourceQuotaBestEffort)
+	handler.indexer.Add(resourceQuotaNotBestEffort)
 
-func TestIncrementUsageReplicationControllers(t *testing.T) {
-	namespace := "default"
-	client := fake.NewSimpleClientset(&api.ReplicationControllerList{
-		Items: []api.ReplicationController{
-			{
-				ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
-			},
-		},
-	})
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
-	}
-	r := api.ResourceReplicationControllers
-	status.Hard[r] = resource.MustParse("2")
-	status.Used[r] = resource.MustParse("1")
-	dirty, err := IncrementUsage(admission.NewAttributesRecord(&api.ReplicationController{}, api.Kind("ReplicationController"), namespace, "name", api.Resource("replicationcontrollers"), "", admission.Create, nil), status, client)
+	// create a pod that is best effort because it does not make a request for anything
+	newPod := validPod("allowed-pod", 1, getResourceRequirements(getResourceList("", ""), getResourceList("", "")))
+	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
 	if err != nil {
 		t.Errorf("Unexpected error: %v", err)
 	}
-	if !dirty {
-		t.Errorf("Expected the status to get incremented, therefore should have been dirty")
+	expectedActionSet := sets.NewString(
+		strings.Join([]string{"update", "resourcequotas", "status"}, "-"),
+	)
+	actionSet := sets.NewString()
+	for _, action := range kubeClient.Actions() {
+		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
+	}
+	if !actionSet.HasAll(expectedActionSet.List()...) {
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
+	}
+	lastActionIndex := len(kubeClient.Actions()) - 1
+	usage := kubeClient.Actions()[lastActionIndex].(testclient.UpdateAction).GetObject().(*api.ResourceQuota)
+
+	if usage.Name != resourceQuotaBestEffort.Name {
+		t.Errorf("Incremented the wrong quota, expected %v, actual %v", resourceQuotaBestEffort.Name, usage.Name)
+	}
+
+	expectedUsage := api.ResourceQuota{
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourcePods: resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourcePods: resource.MustParse("4"),
+			},
+		},
+	}
+	for k, v := range expectedUsage.Status.Used {
+		actual := usage.Status.Used[k]
+		actualValue := actual.String()
+		expectedValue := v.String()
+		if expectedValue != actualValue {
+			t.Errorf("Usage Used: Key: %v, Expected: %v, Actual: %v", k, expectedValue, actualValue)
 		}
-	quantity := status.Used[r]
-	if quantity.Value() != int64(2) {
-		t.Errorf("Expected new item count to be 2, but was %s", quantity.String())
 	}
 }
 
-func TestExceedUsageReplicationControllers(t *testing.T) {
-	namespace := "default"
-	client := fake.NewSimpleClientset(&api.ReplicationControllerList{
-		Items: []api.ReplicationController{
-			{
-				ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
+// TestAdmitBestEffortQuotaLimitIgnoresBurstable validates that a besteffort quota does not match a resource
+// guaranteed pod.
+func TestAdmitBestEffortQuotaLimitIgnoresBurstable(t *testing.T) {
+	resourceQuota := &api.ResourceQuota{
+		ObjectMeta: api.ObjectMeta{Name: "quota-besteffort", Namespace: "test", ResourceVersion: "124"},
+		Spec: api.ResourceQuotaSpec{
+			Scopes: []api.ResourceQuotaScope{api.ResourceQuotaScopeBestEffort},
+		},
+		Status: api.ResourceQuotaStatus{
+			Hard: api.ResourceList{
+				api.ResourcePods: resource.MustParse("5"),
+			},
+			Used: api.ResourceList{
+				api.ResourcePods: resource.MustParse("3"),
 			},
 		},
-	})
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
 	}
-	r := api.ResourceReplicationControllers
-	status.Hard[r] = resource.MustParse("1")
-	status.Used[r] = resource.MustParse("1")
-	_, err := IncrementUsage(admission.NewAttributesRecord(&api.ReplicationController{}, api.Kind("ReplicationController"), namespace, "name", api.Resource("replicationcontrollers"), "", admission.Create, nil), status, client)
-	if err == nil {
-		t.Errorf("Expected error for exceeding hard limits")
+	kubeClient := fake.NewSimpleClientset(resourceQuota)
+	indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
+	handler := &quotaAdmission{
+		Handler:  admission.NewHandler(admission.Create, admission.Update),
+		client:   kubeClient,
+		indexer:  indexer,
+		registry: install.NewRegistry(kubeClient),
+	}
+	handler.indexer.Add(resourceQuota)
+	newPod := validPod("allowed-pod", 1, getResourceRequirements(getResourceList("100m", "1Gi"), getResourceList("", "")))
+	err := handler.Admit(admission.NewAttributesRecord(newPod, api.Kind("Pod"), newPod.Namespace, newPod.Name, api.Resource("pods"), "", admission.Create, nil))
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if len(kubeClient.Actions()) != 0 {
+		t.Errorf("Expected no client actions because the incoming pod did not match best effort quota")
 	}
 }
 
-func TestExceedUsageSecrets(t *testing.T) {
-	namespace := "default"
-	client := fake.NewSimpleClientset(&api.SecretList{
-		Items: []api.Secret{
-			{
-				ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
-			},
-		},
-	})
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
-	}
-	r := api.ResourceSecrets
-	status.Hard[r] = resource.MustParse("1")
-	status.Used[r] = resource.MustParse("1")
-	_, err := IncrementUsage(admission.NewAttributesRecord(&api.Secret{}, api.Kind("Secret"), namespace, "name", api.Resource("secrets"), "", admission.Create, nil), status, client)
-	if err == nil {
-		t.Errorf("Expected error for exceeding hard limits")
-	}
-}
-
-func TestExceedUsagePersistentVolumeClaims(t *testing.T) {
-	namespace := "default"
-	client := fake.NewSimpleClientset(&api.PersistentVolumeClaimList{
-		Items: []api.PersistentVolumeClaim{
-			{
-				ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
-			},
-		},
-	})
-	status := &api.ResourceQuotaStatus{
-		Hard: api.ResourceList{},
-		Used: api.ResourceList{},
-	}
-	r := api.ResourcePersistentVolumeClaims
-	status.Hard[r] = resource.MustParse("1")
-	status.Used[r] = resource.MustParse("1")
-	_, err := IncrementUsage(admission.NewAttributesRecord(&api.PersistentVolumeClaim{}, api.Kind("PersistentVolumeClaim"), namespace, "name", api.Resource("persistentvolumeclaims"), "", admission.Create, nil), status, client)
-	if err == nil {
-		t.Errorf("Expected error for exceeding hard limits")
-	}
-}
-
-func TestIncrementUsageOnUpdateIgnoresNonPodResources(t *testing.T) {
-	testCase := []struct {
-		kind        unversioned.GroupKind
-		resource    unversioned.GroupResource
-		subresource string
-		object      runtime.Object
+func TestHasUsageStats(t *testing.T) {
+	testCases := map[string]struct {
+		a        api.ResourceQuota
+		expected bool
 	}{
-		{
-			kind:     api.Kind("Service"),
-			resource: api.Resource("services"),
-			object:   &api.Service{},
+		"empty": {
+			a:        api.ResourceQuota{Status: api.ResourceQuotaStatus{Hard: api.ResourceList{}}},
+			expected: true,
 		},
-		{
-			kind:     api.Kind("ReplicationController"),
-			resource: api.Resource("replicationcontrollers"),
-			object:   &api.ReplicationController{},
+		"hard-only": {
+			a: api.ResourceQuota{
+				Status: api.ResourceQuotaStatus{
+					Hard: api.ResourceList{
+						api.ResourceMemory: resource.MustParse("1Gi"),
 					},
-		{
-			kind:     api.Kind("ResourceQuota"),
-			resource: api.Resource("resourcequotas"),
-			object:   &api.ResourceQuota{},
-		},
-		{
-			kind:     api.Kind("Secret"),
-			resource: api.Resource("secrets"),
-			object:   &api.Secret{},
-		},
-		{
-			kind:     api.Kind("PersistentVolumeClaim"),
-			resource: api.Resource("persistentvolumeclaims"),
-			object:   &api.PersistentVolumeClaim{},
-		},
-	}
-
-	for _, testCase := range testCase {
-		client := fake.NewSimpleClientset()
-		status := &api.ResourceQuotaStatus{
-			Hard: api.ResourceList{},
 					Used: api.ResourceList{},
+				},
+			},
+			expected: false,
+		},
+		"hard-used": {
+			a: api.ResourceQuota{
+				Status: api.ResourceQuotaStatus{
+					Hard: api.ResourceList{
+						api.ResourceMemory: resource.MustParse("1Gi"),
+					},
+					Used: api.ResourceList{
+						api.ResourceMemory: resource.MustParse("500Mi"),
+					},
+				},
+			},
+			expected: true,
+		},
 	}
-		r := resourceToResourceName[testCase.resource]
-		status.Hard[r] = resource.MustParse("2")
-		status.Used[r] = resource.MustParse("1")
-
-		attributesRecord := admission.NewAttributesRecord(testCase.object, testCase.kind, "my-ns", "new-thing",
-			testCase.resource, testCase.subresource, admission.Update, nil)
-		dirty, err := IncrementUsage(attributesRecord, status, client)
-		if err != nil {
-			t.Errorf("Increment usage of resource %v had unexpected error: %v", testCase.resource, err)
-		}
-		if dirty {
-			t.Errorf("Increment usage of resource %v should not result in a dirty quota on update", testCase.resource)
+	for testName, testCase := range testCases {
+		if result := hasUsageStats(&testCase.a); result != testCase.expected {
+			t.Errorf("%s expected: %v, actual: %v", testName, testCase.expected, result)
 		}
 	}
 }