Federated Ingress: unify UID's across Cluster Ingress Controllers

federation/pkg/federation-controller/util/delaying_deliverer.go

@@ -162,7 +162,7 @@ func (d *DelayingDeliverer) DeliverAfter(key string, value interface{}, delay ti
 	d.DeliverAt(key, value, time.Now().Add(delay))
 }
 
-// Gets target chanel of the deliverer.
+// Gets target channel of the deliverer.
 func (d *DelayingDeliverer) GetTargetChannel() chan *DelayingDelivererItem {
 	return d.targetChannel
 }

federation/pkg/federation-controller/util/federated_informer.go

@@ -85,9 +85,9 @@ type FederationView interface {
 	ClustersSynced() bool
 }
 
-// A structure that combines an informer running agains federated api server and listening for cluster updates
+// A structure that combines an informer running against federated api server and listening for cluster updates
 // with multiple Kubernetes API informers (called target informers) running against federation members. Whenever a new
-// cluster is added to the federation an informer is created for it using TargetInformerFactory. Infomrers are stoped
+// cluster is added to the federation an informer is created for it using TargetInformerFactory. Informers are stopped
 // when a cluster is either put offline of deleted. It is assumed that some controller keeps an eye on the cluster list
 // and thus the clusters in ETCD are up to date.
 type FederatedInformer interface {
@@ -186,18 +186,22 @@ func NewFederatedInformer(
 					if clusterLifecycle.ClusterAvailable != nil {
 						clusterLifecycle.ClusterAvailable(curCluster)
 					}
+				} else {
+					glog.Errorf("Cluster %v not added.  Not of correct type, or cluster not ready.", cur)
 				}
 			},
 			UpdateFunc: func(old, cur interface{}) {
 				oldCluster, ok := old.(*federation_api.Cluster)
 				if !ok {
+					glog.Errorf("Internal error: Cluster %v not updated.  Old cluster not of correct type.", old)
 					return
 				}
 				curCluster, ok := cur.(*federation_api.Cluster)
 				if !ok {
+					glog.Errorf("Internal error: Cluster %v not updated.  New cluster not of correct type.", cur)
 					return
 				}
-				if isClusterReady(oldCluster) != isClusterReady(curCluster) || !reflect.DeepEqual(oldCluster.Spec, curCluster.Spec) {
+				if isClusterReady(oldCluster) != isClusterReady(curCluster) || !reflect.DeepEqual(oldCluster.Spec, curCluster.Spec) || !reflect.DeepEqual(oldCluster.ObjectMeta.Annotations, curCluster.ObjectMeta.Annotations) {
 					var data []interface{}
 					if clusterLifecycle.ClusterUnavailable != nil {
 						data = getClusterData(oldCluster.Name)
@@ -213,6 +217,8 @@ func NewFederatedInformer(
 							clusterLifecycle.ClusterAvailable(curCluster)
 						}
 					}
+				} else {
+					glog.V(4).Infof("Cluster %v not updated to %v as ready status and specs are identical", oldCluster, curCluster)
 				}
 			},
 		},
@@ -258,11 +264,14 @@ type federatedStoreImpl struct {
 }
 
 func (f *federatedInformerImpl) Stop() {
+	glog.V(4).Infof("Stopping federated informer.")
 	f.Lock()
 	defer f.Unlock()
 
+	glog.V(4).Infof("... Closing cluster informer channel.")
 	close(f.clusterInformer.stopChan)
-	for _, informer := range f.targetInformers {
+	for key, informer := range f.targetInformers {
+		glog.V(4).Infof("... Closing informer channel for %q.", key)
 		close(informer.stopChan)
 	}
 }
@@ -291,14 +300,16 @@ func (f *federatedInformerImpl) GetClientsetForCluster(clusterName string) (kube
 
 func (f *federatedInformerImpl) getClientsetForClusterUnlocked(clusterName string) (kube_release_1_4.Interface, error) {
 	// No locking needed. Will happen in f.GetCluster.
+	glog.V(4).Infof("Getting clientset for cluster %q", clusterName)
 	if cluster, found, err := f.getReadyClusterUnlocked(clusterName); found && err == nil {
+		glog.V(4).Infof("Got clientset for cluster %q", clusterName)
 		return f.clientFactory(cluster)
 	} else {
 		if err != nil {
 			return nil, err
 		}
 	}
-	return nil, fmt.Errorf("cluster %s not found", clusterName)
+	return nil, fmt.Errorf("cluster %q not found", clusterName)
 }
 
 // GetReadyClusers returns all clusters for which the sub-informers are run.
@@ -441,7 +452,7 @@ func (fs *federatedStoreImpl) GetFromAllClusters(key string) ([]FederatedObject,
 	return result, nil
 }
 
-// GetKey for returns the key under which the item would be put in the store.
+// GetKeyFor returns the key under which the item would be put in the store.
 func (fs *federatedStoreImpl) GetKeyFor(item interface{}) string {
 	// TODO: support other keying functions.
 	key, _ := framework.DeletionHandlingMetaNamespaceKeyFunc(item)

federation/pkg/federation-controller/util/test/test_helper.go

@@ -64,10 +64,14 @@ func (wd *WatcherDispatcher) Add(obj runtime.Object) {
 func (wd *WatcherDispatcher) Modify(obj runtime.Object) {
 	wd.Lock()
 	defer wd.Unlock()
+	glog.V(4).Infof("->WatcherDispatcher.Modify(%v)", obj)
 	wd.eventsSoFar = append(wd.eventsSoFar, &watch.Event{Type: watch.Modified, Object: obj})
-	for _, watcher := range wd.watchers {
+	for i, watcher := range wd.watchers {
 		if !watcher.IsStopped() {
+			glog.V(4).Infof("->Watcher(%d).Modify(%v)", i, obj)
 			watcher.Modify(obj)
+		} else {
+			glog.V(4).Infof("->Watcher(%d) is stopped.  Not calling Modify(%v)", i, obj)
 		}
 	}
 }
@@ -173,7 +177,7 @@ func GetObjectFromChan(c chan runtime.Object) runtime.Object {
 	select {
 	case obj := <-c:
 		return obj
-	case <-time.After(10 * time.Second):
+	case <-time.After(20 * time.Second):
 		pprof.Lookup("goroutine").WriteTo(os.Stderr, 1)
 		return nil
 	}

federation/pkg/federation-controller/util/util.go

-/*
-Copyright 2016 The Kubernetes Authors.
-
-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 util
-
-import (
-	"reflect"
-
-	"k8s.io/kubernetes/pkg/api/v1"
-)
-
-/*
-ObjectMetaIsEquivalent determines whether two ObjectMeta's (typically one from a federated API object,
-and the other from a cluster object) are equivalent.
-*/
-func ObjectMetaIsEquivalent(m1, m2 v1.ObjectMeta) bool {
-	// First make all of the read-only fields equal, then perform a deep equality comparison
-	m1.SelfLink = m2.SelfLink                   // Might be different in different cluster contexts.
-	m1.UID = m2.UID                             // Definitely different in different cluster contexts
-	m1.ResourceVersion = m2.ResourceVersion     // Definitely different in different cluster contexts
-	m1.Generation = m2.Generation               // Might be different in different cluster contexts.
-	m1.CreationTimestamp = m2.CreationTimestamp // Definitely different in different cluster contexts.
-	m1.DeletionTimestamp = m2.DeletionTimestamp // Might be different in different cluster contexts.
-	m1.OwnerReferences = nil                    // Might be different in different cluster contexts.
-	m2.OwnerReferences = nil
-	m1.Finalizers = nil // Might be different in different cluster contexts.
-	m2.Finalizers = nil
-
-	return reflect.DeepEqual(m1, m2)
-}

pkg/watch/watch.go

@@ -20,6 +20,8 @@ import (
 	"sync"
 
 	"k8s.io/kubernetes/pkg/runtime"
+
+	"github.com/golang/glog"
 )
 
 // Interface can be implemented by anything that knows how to watch and report changes.
@@ -100,6 +102,7 @@ func (f *FakeWatcher) Stop() {
 	f.Lock()
 	defer f.Unlock()
 	if !f.Stopped {
+		glog.V(4).Infof("Stopping fake watcher.")
 		close(f.result)
 		f.Stopped = true
 	}