fix RC lister

pkg/client/cache/listers.go

@@ -32,6 +32,7 @@ import (
 	"k8s.io/kubernetes/pkg/labels"
 )
 
+// AppendFunc is used to add a matching item to whatever list the caller is using
 type AppendFunc func(interface{})
 
 func ListAll(store Store, selector labels.Selector, appendFn AppendFunc) error {
@@ -136,116 +137,6 @@ func (s storeToNodeConditionLister) List() (nodes []*api.Node, err error) {
 	return
 }
 
-// StoreToReplicationControllerLister gives a store List and Exists methods. The store must contain only ReplicationControllers.
-type StoreToReplicationControllerLister struct {
-	Indexer
-}
-
-// Exists checks if the given rc exists in the store.
-func (s *StoreToReplicationControllerLister) Exists(controller *api.ReplicationController) (bool, error) {
-	_, exists, err := s.Indexer.Get(controller)
-	if err != nil {
-		return false, err
-	}
-	return exists, nil
-}
-
-// StoreToReplicationControllerLister lists all controllers in the store.
-// TODO: converge on the interface in pkg/client
-func (s *StoreToReplicationControllerLister) List() (controllers []api.ReplicationController, err error) {
-	for _, c := range s.Indexer.List() {
-		controllers = append(controllers, *(c.(*api.ReplicationController)))
-	}
-	return controllers, nil
-}
-
-func (s *StoreToReplicationControllerLister) ReplicationControllers(namespace string) storeReplicationControllersNamespacer {
-	return storeReplicationControllersNamespacer{s.Indexer, namespace}
-}
-
-type storeReplicationControllersNamespacer struct {
-	indexer   Indexer
-	namespace string
-}
-
-func (s storeReplicationControllersNamespacer) List(selector labels.Selector) ([]api.ReplicationController, error) {
-	controllers := []api.ReplicationController{}
-
-	if s.namespace == api.NamespaceAll {
-		for _, m := range s.indexer.List() {
-			rc := *(m.(*api.ReplicationController))
-			if selector.Matches(labels.Set(rc.Labels)) {
-				controllers = append(controllers, rc)
-			}
-		}
-		return controllers, nil
-	}
-
-	key := &api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: s.namespace}}
-	items, err := s.indexer.Index(NamespaceIndex, key)
-	if err != nil {
-		// Ignore error; do slow search without index.
-		glog.Warningf("can not retrieve list of objects using index : %v", err)
-		for _, m := range s.indexer.List() {
-			rc := *(m.(*api.ReplicationController))
-			if s.namespace == rc.Namespace && selector.Matches(labels.Set(rc.Labels)) {
-				controllers = append(controllers, rc)
-			}
-		}
-		return controllers, nil
-	}
-	for _, m := range items {
-		rc := *(m.(*api.ReplicationController))
-		if selector.Matches(labels.Set(rc.Labels)) {
-			controllers = append(controllers, rc)
-		}
-	}
-	return controllers, nil
-}
-
-func (s storeReplicationControllersNamespacer) Get(name string) (*api.ReplicationController, error) {
-	obj, exists, err := s.indexer.GetByKey(s.namespace + "/" + name)
-	if err != nil {
-		return nil, err
-	}
-	if !exists {
-		return nil, errors.NewNotFound(api.Resource("replicationcontroller"), name)
-	}
-	return obj.(*api.ReplicationController), nil
-}
-
-// GetPodControllers returns a list of replication controllers managing a pod. Returns an error only if no matching controllers are found.
-func (s *StoreToReplicationControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
-	var selector labels.Selector
-	var rc api.ReplicationController
-
-	if len(pod.Labels) == 0 {
-		err = fmt.Errorf("no controllers found for pod %v because it has no labels", pod.Name)
-		return
-	}
-
-	key := &api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: pod.Namespace}}
-	items, err := s.Indexer.Index(NamespaceIndex, key)
-	if err != nil {
-		return
-	}
-
-	for _, m := range items {
-		rc = *m.(*api.ReplicationController)
-		selector = labels.Set(rc.Spec.Selector).AsSelectorPreValidated()
-
-		// If an rc with a nil or empty selector creeps in, it should match nothing, not everything.
-		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
-			continue
-		}
-		controllers = append(controllers, rc)
-	}
-	if len(controllers) == 0 {
-		err = fmt.Errorf("could not find controller for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
-	}
-	return
-}
-
 // StoreToDeploymentLister gives a store List and Exists methods. The store must contain only Deployments.
 type StoreToDeploymentLister struct {
 	Indexer

pkg/client/cache/listers_core.go

@@ -17,6 +17,8 @@ limitations under the License.
 package cache
 
 import (
+	"fmt"
+
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/errors"
 	"k8s.io/kubernetes/pkg/labels"
@@ -25,24 +27,24 @@ import (
 //  TODO: generate these classes and methods for all resources of interest using
 // a script.  Can use "go generate" once 1.4 is supported by all users.
 
-// StoreToPodLister makes a Store have the List method of the client.PodInterface
+// Lister makes an Index have the List method.  The Stores must contain only the expected type
-// The Store must contain (only) Pods.
-//
 // Example:
 // s := cache.NewStore()
 // lw := cache.ListWatch{Client: c, FieldSelector: sel, Resource: "pods"}
 // r := cache.NewReflector(lw, &api.Pod{}, s).Run()
 // l := StoreToPodLister{s}
 // l.List()
+
+// StoreToPodLister helps list pods
 type StoreToPodLister struct {
 	Indexer Indexer
 }
 
-func (s *StoreToPodLister) List(selector labels.Selector) (pods []*api.Pod, err error) {
+func (s *StoreToPodLister) List(selector labels.Selector) (ret []*api.Pod, err error) {
 	err = ListAll(s.Indexer, selector, func(m interface{}) {
-		pods = append(pods, m.(*api.Pod))
+		ret = append(ret, m.(*api.Pod))
 	})
-	return pods, err
+	return ret, err
 }
 
 func (s *StoreToPodLister) Pods(namespace string) storePodsNamespacer {
@@ -54,11 +56,11 @@ type storePodsNamespacer struct {
 	namespace string
 }
 
-func (s storePodsNamespacer) List(selector labels.Selector) (pods []*api.Pod, err error) {
+func (s storePodsNamespacer) List(selector labels.Selector) (ret []*api.Pod, err error) {
 	err = ListAllByNamespace(s.Indexer, s.namespace, selector, func(m interface{}) {
-		pods = append(pods, m.(*api.Pod))
+		ret = append(ret, m.(*api.Pod))
 	})
-	return pods, err
+	return ret, err
 }
 
 func (s storePodsNamespacer) Get(name string) (*api.Pod, error) {
@@ -133,3 +135,71 @@ func (s *StoreToServiceLister) GetPodServices(pod *api.Pod) (services []*api.Ser
 
 	return services, nil
 }
+
+// StoreToReplicationControllerLister helps list rcs
+type StoreToReplicationControllerLister struct {
+	Indexer Indexer
+}
+
+func (s *StoreToReplicationControllerLister) List(selector labels.Selector) (ret []*api.ReplicationController, err error) {
+	err = ListAll(s.Indexer, selector, func(m interface{}) {
+		ret = append(ret, m.(*api.ReplicationController))
+	})
+	return ret, err
+}
+
+func (s *StoreToReplicationControllerLister) ReplicationControllers(namespace string) storeReplicationControllersNamespacer {
+	return storeReplicationControllersNamespacer{s.Indexer, namespace}
+}
+
+type storeReplicationControllersNamespacer struct {
+	indexer   Indexer
+	namespace string
+}
+
+func (s storeReplicationControllersNamespacer) List(selector labels.Selector) (ret []*api.ReplicationController, err error) {
+	err = ListAllByNamespace(s.indexer, s.namespace, selector, func(m interface{}) {
+		ret = append(ret, m.(*api.ReplicationController))
+	})
+	return ret, err
+}
+
+func (s storeReplicationControllersNamespacer) Get(name string) (*api.ReplicationController, error) {
+	obj, exists, err := s.indexer.GetByKey(s.namespace + "/" + name)
+	if err != nil {
+		return nil, err
+	}
+	if !exists {
+		return nil, errors.NewNotFound(api.Resource("replicationcontroller"), name)
+	}
+	return obj.(*api.ReplicationController), nil
+}
+
+// GetPodControllers returns a list of replication controllers managing a pod. Returns an error only if no matching controllers are found.
+func (s *StoreToReplicationControllerLister) GetPodControllers(pod *api.Pod) (controllers []*api.ReplicationController, err error) {
+	if len(pod.Labels) == 0 {
+		err = fmt.Errorf("no controllers found for pod %v because it has no labels", pod.Name)
+		return
+	}
+
+	key := &api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: pod.Namespace}}
+	items, err := s.Indexer.Index(NamespaceIndex, key)
+	if err != nil {
+		return
+	}
+
+	for _, m := range items {
+		rc := m.(*api.ReplicationController)
+		selector := labels.Set(rc.Spec.Selector).AsSelectorPreValidated()
+
+		// If an rc with a nil or empty selector creeps in, it should match nothing, not everything.
+		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
+			continue
+		}
+		controllers = append(controllers, rc)
+	}
+	if len(controllers) == 0 {
+		err = fmt.Errorf("could not find controller for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
+	}
+	return
+}

pkg/client/cache/listers_test.go

@@ -128,7 +128,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 	testCases := []struct {
 		description              string
 		inRCs                    []*api.ReplicationController
-		list                     func(StoreToReplicationControllerLister) ([]api.ReplicationController, error)
+		list                     func(StoreToReplicationControllerLister) ([]*api.ReplicationController, error)
 		outRCNames               sets.String
 		expectErr                bool
 		onlyIfIndexedByNamespace bool
@@ -143,7 +143,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 					ObjectMeta: api.ObjectMeta{Name: "hmm", Namespace: "hmm"},
 				},
 			},
-			list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
+			list: func(lister StoreToReplicationControllerLister) ([]*api.ReplicationController, error) {
 				return lister.ReplicationControllers(api.NamespaceAll).List(labels.Set{}.AsSelectorPreValidated())
 			},
 			outRCNames: sets.NewString("hmm", "foo"),
@@ -158,7 +158,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 					ObjectMeta: api.ObjectMeta{Name: "hmm", Namespace: "hmm"},
 				},
 			},
-			list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
+			list: func(lister StoreToReplicationControllerLister) ([]*api.ReplicationController, error) {
 				return lister.ReplicationControllers("hmm").List(labels.Set{}.AsSelectorPreValidated())
 			},
 			outRCNames: sets.NewString("hmm"),
@@ -168,8 +168,8 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 			inRCs: []*api.ReplicationController{
 				{ObjectMeta: api.ObjectMeta{Name: "basic"}},
 			},
-			list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
+			list: func(lister StoreToReplicationControllerLister) ([]*api.ReplicationController, error) {
-				return lister.List()
+				return lister.List(labels.Everything())
 			},
 			outRCNames: sets.NewString("basic"),
 		},
@@ -183,7 +183,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 					},
 				},
 			},
-			list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
+			list: func(lister StoreToReplicationControllerLister) ([]*api.ReplicationController, error) {
 				pod := &api.Pod{
 					ObjectMeta: api.ObjectMeta{Name: "pod1", Namespace: "ns"},
 				}
@@ -199,7 +199,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 					ObjectMeta: api.ObjectMeta{Name: "basic", Namespace: "ns"},
 				},
 			},
-			list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
+			list: func(lister StoreToReplicationControllerLister) ([]*api.ReplicationController, error) {
 				pod := &api.Pod{
 					ObjectMeta: api.ObjectMeta{
 						Name:      "pod1",
@@ -228,7 +228,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
 					},
 				},
 			},
-			list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
+			list: func(lister StoreToReplicationControllerLister) ([]*api.ReplicationController, error) {
 				pod := &api.Pod{
 					ObjectMeta: api.ObjectMeta{
 						Name:      "pod1",

pkg/controller/replication/replication_controller.go

@@ -269,16 +269,16 @@ func (rm *ReplicationManager) getPodController(pod *api.Pod) *api.ReplicationCon
 	}
 
 	// update lookup cache
-	rm.lookupCache.Update(pod, &controllers[0])
+	rm.lookupCache.Update(pod, controllers[0])
 
-	return &controllers[0]
+	return controllers[0]
 }
 
 // isCacheValid check if the cache is valid
 func (rm *ReplicationManager) isCacheValid(pod *api.Pod, cachedRC *api.ReplicationController) bool {
-	exists, err := rm.rcStore.Exists(cachedRC)
+	_, err := rm.rcStore.ReplicationControllers(cachedRC.Namespace).Get(cachedRC.Name)
 	// rc has been deleted or updated, cache is invalid
-	if err != nil || !exists || !isControllerMatch(pod, cachedRC) {
+	if err != nil || !isControllerMatch(pod, cachedRC) {
 		return false
 	}
 	return true

pkg/controller/replication/replication_controller_utils.go

@@ -71,7 +71,7 @@ func updateReplicaCount(rcClient unversionedcore.ReplicationControllerInterface,
 }
 
 // OverlappingControllers sorts a list of controllers by creation timestamp, using their names as a tie breaker.
-type OverlappingControllers []api.ReplicationController
+type OverlappingControllers []*api.ReplicationController
 
 func (o OverlappingControllers) Len() int      { return len(o) }
 func (o OverlappingControllers) Swap(i, j int) { o[i], o[j] = o[j], o[i] }

plugin/pkg/scheduler/algorithm/listers.go

@@ -101,37 +101,38 @@ func (f FakeServiceLister) GetPodServices(pod *api.Pod) (services []*api.Service
 // ControllerLister interface represents anything that can produce a list of ReplicationController; the list is consumed by a scheduler.
 type ControllerLister interface {
 	// Lists all the replication controllers
-	List() ([]api.ReplicationController, error)
+	List(labels.Selector) ([]*api.ReplicationController, error)
 	// Gets the services for the given pod
-	GetPodControllers(*api.Pod) ([]api.ReplicationController, error)
+	GetPodControllers(*api.Pod) ([]*api.ReplicationController, error)
 }
 
 // EmptyControllerLister implements ControllerLister on []api.ReplicationController returning empty data
 type EmptyControllerLister struct{}
 
 // List returns nil
-func (f EmptyControllerLister) List() ([]api.ReplicationController, error) {
+func (f EmptyControllerLister) List(labels.Selector) ([]*api.ReplicationController, error) {
 	return nil, nil
 }
 
 // GetPodControllers returns nil
-func (f EmptyControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
+func (f EmptyControllerLister) GetPodControllers(pod *api.Pod) (controllers []*api.ReplicationController, err error) {
 	return nil, nil
 }
 
 // FakeControllerLister implements ControllerLister on []api.ReplicationController for test purposes.
-type FakeControllerLister []api.ReplicationController
+type FakeControllerLister []*api.ReplicationController
 
 // List returns []api.ReplicationController, the list of all ReplicationControllers.
-func (f FakeControllerLister) List() ([]api.ReplicationController, error) {
+func (f FakeControllerLister) List(labels.Selector) ([]*api.ReplicationController, error) {
 	return f, nil
 }
 
 // GetPodControllers gets the ReplicationControllers that have the selector that match the labels on the given pod
-func (f FakeControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
+func (f FakeControllerLister) GetPodControllers(pod *api.Pod) (controllers []*api.ReplicationController, err error) {
 	var selector labels.Selector
 
-	for _, controller := range f {
+	for i := range f {
+		controller := f[i]
 		if controller.Namespace != pod.Namespace {
 			continue
 		}

plugin/pkg/scheduler/algorithm/priorities/selector_spreading_test.go

@@ -57,7 +57,7 @@ func TestSelectorSpreadPriority(t *testing.T) {
 		pod          *api.Pod
 		pods         []*api.Pod
 		nodes        []string
-		rcs          []api.ReplicationController
+		rcs          []*api.ReplicationController
 		rss          []extensions.ReplicaSet
 		services     []*api.Service
 		expectedList schedulerapi.HostPriorityList
@@ -181,7 +181,7 @@ func TestSelectorSpreadPriority(t *testing.T) {
 				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
 			},
 			nodes:    []string{"machine1", "machine2"},
-			rcs:      []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
+			rcs:      []*api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
 			services: []*api.Service{{Spec: api.ServiceSpec{Selector: map[string]string{"baz": "blah"}}}},
 			// "baz=blah" matches both labels1 and labels2, and "foo=bar" matches only labels 1. This means that we assume that we want to
 			// do spreading between all pods. The result should be exactly as above.
@@ -210,7 +210,7 @@ func TestSelectorSpreadPriority(t *testing.T) {
 				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
 			},
 			nodes:    []string{"machine1", "machine2"},
-			rcs:      []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
+			rcs:      []*api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
 			services: []*api.Service{{Spec: api.ServiceSpec{Selector: map[string]string{"bar": "foo"}}}},
 			// Taken together Service and Replication Controller should match all Pods, hence result should be equal to one above.
 			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
@@ -238,7 +238,7 @@ func TestSelectorSpreadPriority(t *testing.T) {
 				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
 			},
 			nodes: []string{"machine1", "machine2"},
-			rcs:   []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
+			rcs:   []*api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"foo": "bar"}}}},
 			// Both Nodes have one pod from the given RC, hence both get 0 score.
 			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}},
 			test:         "Replication controller with partial pod label matches",
@@ -264,7 +264,7 @@ func TestSelectorSpreadPriority(t *testing.T) {
 				{Spec: zone2Spec, ObjectMeta: api.ObjectMeta{Labels: labels1, OwnerReferences: controllerRef("ReplicationController", "name", "abc123")}},
 			},
 			nodes:        []string{"machine1", "machine2"},
-			rcs:          []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"baz": "blah"}}}},
+			rcs:          []*api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: map[string]string{"baz": "blah"}}}},
 			expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 5}},
 			test:         "Another replication controller with partial pod label matches",
 		},
@@ -344,7 +344,7 @@ func TestZoneSelectorSpreadPriority(t *testing.T) {
 		pod          *api.Pod
 		pods         []*api.Pod
 		nodes        []string
-		rcs          []api.ReplicationController
+		rcs          []*api.ReplicationController
 		rss          []extensions.ReplicaSet
 		services     []*api.Service
 		expectedList schedulerapi.HostPriorityList
@@ -471,7 +471,7 @@ func TestZoneSelectorSpreadPriority(t *testing.T) {
 				buildPod(nodeMachine1Zone2, labels1, controllerRef("ReplicationController", "name", "abc123")),
 				buildPod(nodeMachine1Zone3, labels1, controllerRef("ReplicationController", "name", "abc123")),
 			},
-			rcs: []api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: labels1}}},
+			rcs: []*api.ReplicationController{{Spec: api.ReplicationControllerSpec{Selector: labels1}}},
 			expectedList: []schedulerapi.HostPriority{
 				// Note that because we put two pods on the same node (nodeMachine1Zone3),
 				// the values here are questionable for zone2, in particular for nodeMachine1Zone2.

plugin/pkg/scheduler/generic_scheduler_test.go

@@ -494,7 +494,7 @@ func TestZeroRequest(t *testing.T) {
 				Function: algorithmpriorities.NewSelectorSpreadPriority(
 					algorithm.FakePodLister(test.pods),
 					algorithm.FakeServiceLister([]*api.Service{}),
-					algorithm.FakeControllerLister([]api.ReplicationController{}),
+					algorithm.FakeControllerLister([]*api.ReplicationController{}),
 					algorithm.FakeReplicaSetLister([]extensions.ReplicaSet{})),
 				Weight: 1,
 			},