Dynamically enable controllers based on what resources the server has.

Dynamically delete namespaces based on what resources the server has.

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

@@ -32,6 +32,7 @@ import (
 	"strconv"
 	"time"
 
+	"k8s.io/kubernetes/pkg/api"
 	client "k8s.io/kubernetes/pkg/client/unversioned"
 	"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
 	clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
@@ -95,7 +96,6 @@ type CMServer struct {
 	ClusterCIDR       net.IPNet
 	AllocateNodeCIDRs bool
 	EnableProfiling   bool
-	EnableExperimental bool
 
 	Master       string
 	Kubeconfig   string
@@ -196,7 +196,6 @@ func (s *CMServer) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&s.Master, "master", s.Master, "The address of the Kubernetes API server (overrides any value in kubeconfig)")
 	fs.StringVar(&s.Kubeconfig, "kubeconfig", s.Kubeconfig, "Path to kubeconfig file with authorization and master location information.")
 	fs.StringVar(&s.RootCAFile, "root-ca-file", s.RootCAFile, "If set, this root certificate authority will be included in service account's token secret. This must be a valid PEM-encoded CA bundle.")
-	fs.BoolVar(&s.EnableExperimental, "enable-experimental", s.EnableExperimental, "Enables experimental controllers (requires enabling experimental API on apiserver).")
 	fs.Float32Var(&s.KubeApiQps, "kube-api-qps", s.KubeApiQps, "QPS to use while talking with kubernetes apiserver")
 	fs.IntVar(&s.KubeApiBurst, "kube-api-burst", s.KubeApiBurst, "Burst to use while talking with kubernetes apiserver")
 }
@@ -287,21 +286,48 @@ func (s *CMServer) Run(_ []string) error {
 
 	resourcequotacontroller.NewResourceQuotaController(kubeClient).Run(s.ResourceQuotaSyncPeriod)
 
-	namespacecontroller.NewNamespaceController(kubeClient, s.EnableExperimental, s.NamespaceSyncPeriod).Run()
+	versionStrings, err := client.ServerAPIVersions(kubeconfig)
+	if err != nil {
+		glog.Fatalf("Failed to get api versions from server: %v", err)
+	}
+	versions := &api.APIVersions{Versions: versionStrings}
 
-	if s.EnableExperimental {
+	resourceMap, err := kubeClient.SupportedResources()
-		go daemon.NewDaemonSetsController(kubeClient, s.resyncPeriod).
+	if err != nil {
-			Run(s.ConcurrentDSCSyncs, util.NeverStop)
+		glog.Fatalf("Failed to get supported resources from server: %v", err)
+	}
 
-		go job.NewJobController(kubeClient, s.resyncPeriod).
+	namespacecontroller.NewNamespaceController(kubeClient, versions, s.NamespaceSyncPeriod).Run()
-			Run(s.ConcurrentJobSyncs, util.NeverStop)
 
+	groupVersion := "extensions/v1beta1"
+	resources, found := resourceMap[groupVersion]
+	// TODO: this needs to be dynamic so users don't have to restart their controller manager if they change the apiserver
+	if containsVersion(versions, groupVersion) && found {
+		glog.Infof("Starting %s apis", groupVersion)
+		if containsResource(resources, "horizontalpodautoscalers") {
+			glog.Infof("Starting horizontal pod controller.")
 			podautoscaler.NewHorizontalController(kubeClient, metrics.NewHeapsterMetricsClient(kubeClient)).
 				Run(s.HorizontalPodAutoscalerSyncPeriod)
+		}
 
+		if containsResource(resources, "daemonsets") {
+			glog.Infof("Starting daemon set controller")
+			go daemon.NewDaemonSetsController(kubeClient, s.resyncPeriod).
+				Run(s.ConcurrentDSCSyncs, util.NeverStop)
+		}
+
+		if containsResource(resources, "jobs") {
+			glog.Infof("Starting job controller")
+			go job.NewJobController(kubeClient, s.resyncPeriod).
+				Run(s.ConcurrentJobSyncs, util.NeverStop)
+		}
+
+		if containsResource(resources, "deployments") {
+			glog.Infof("Starting deployment controller")
 			deployment.New(kubeClient).
 				Run(s.DeploymentControllerSyncPeriod)
 		}
+	}
 
 	pvclaimBinder := persistentvolumecontroller.NewPersistentVolumeClaimBinder(kubeClient, s.PVClaimBinderSyncPeriod)
 	pvclaimBinder.Run()
@@ -348,3 +374,22 @@ func (s *CMServer) Run(_ []string) error {
 
 	select {}
 }
+
+func containsVersion(versions *api.APIVersions, version string) bool {
+	for ix := range versions.Versions {
+		if versions.Versions[ix] == version {
+			return true
+		}
+	}
+	return false
+}
+
+func containsResource(resources *api.APIResourceList, resourceName string) bool {
+	for ix := range resources.APIResources {
+		resource := resources.APIResources[ix]
+		if resource.Name == resourceName {
+			return true
+		}
+	}
+	return false
+}

hack/verify-flags/known-flags.txt

@@ -71,7 +71,6 @@ duration-sec
 e2e-verify-service-account
 e2e-output-dir
 enable-debugging-handlers
-enable-experimental
 enable-server
 etcd-config
 etcd-prefix

pkg/controller/namespace/namespace_controller.go

@@ -43,7 +43,7 @@ type NamespaceController struct {
 }
 
 // NewNamespaceController creates a new NamespaceController
-func NewNamespaceController(kubeClient client.Interface, experimentalMode bool, resyncPeriod time.Duration) *NamespaceController {
+func NewNamespaceController(kubeClient client.Interface, versions *api.APIVersions, resyncPeriod time.Duration) *NamespaceController {
 	var controller *framework.Controller
 	_, controller = framework.NewInformer(
 		&cache.ListWatch{
@@ -60,7 +60,7 @@ func NewNamespaceController(kubeClient client.Interface, experimentalMode bool,
 		framework.ResourceEventHandlerFuncs{
 			AddFunc: func(obj interface{}) {
 				namespace := obj.(*api.Namespace)
-				if err := syncNamespace(kubeClient, experimentalMode, namespace); err != nil {
+				if err := syncNamespace(kubeClient, versions, namespace); err != nil {
 					if estimate, ok := err.(*contentRemainingError); ok {
 						go func() {
 							// Estimate is the aggregate total of TerminationGracePeriodSeconds, which defaults to 30s
@@ -82,7 +82,7 @@ func NewNamespaceController(kubeClient client.Interface, experimentalMode bool,
 			},
 			UpdateFunc: func(oldObj, newObj interface{}) {
 				namespace := newObj.(*api.Namespace)
-				if err := syncNamespace(kubeClient, experimentalMode, namespace); err != nil {
+				if err := syncNamespace(kubeClient, versions, namespace); err != nil {
 					if estimate, ok := err.(*contentRemainingError); ok {
 						go func() {
 							t := estimate.Estimate/2 + 1
@@ -155,7 +155,7 @@ func (e *contentRemainingError) Error() string {
 // deleteAllContent will delete all content known to the system in a namespace. It returns an estimate
 // of the time remaining before the remaining resources are deleted. If estimate > 0 not all resources
 // are guaranteed to be gone.
-func deleteAllContent(kubeClient client.Interface, experimentalMode bool, namespace string, before unversioned.Time) (estimate int64, err error) {
+func deleteAllContent(kubeClient client.Interface, versions *api.APIVersions, namespace string, before unversioned.Time) (estimate int64, err error) {
 	err = deleteServiceAccounts(kubeClient, namespace)
 	if err != nil {
 		return estimate, err
@@ -193,26 +193,41 @@ func deleteAllContent(kubeClient client.Interface, experimentalMode bool, namesp
 		return estimate, err
 	}
 	// If experimental mode, delete all experimental resources for the namespace.
-	if experimentalMode {
+	if containsVersion(versions, "extensions/v1beta1") {
+		resources, err := kubeClient.SupportedResourcesForGroupVersion("extensions/v1beta1")
+		glog.Errorf("%v", resources)
+		if err != nil {
+			return estimate, err
+		}
+		if containsResource(resources, "horizontalpodautoscalers") {
 			err = deleteHorizontalPodAutoscalers(kubeClient.Extensions(), namespace)
 			if err != nil {
 				return estimate, err
 			}
+		}
+		if containsResource(resources, "ingress") {
+			err = deleteIngress(kubeClient.Extensions(), namespace)
+			if err != nil {
+				return estimate, err
+			}
+		}
+		if containsResource(resources, "daemonsets") {
 			err = deleteDaemonSets(kubeClient.Extensions(), namespace)
 			if err != nil {
 				return estimate, err
 			}
+		}
+		if containsResource(resources, "jobs") {
 			err = deleteJobs(kubeClient.Extensions(), namespace)
 			if err != nil {
 				return estimate, err
 			}
+		}
+		if containsResource(resources, "deployments") {
 			err = deleteDeployments(kubeClient.Extensions(), namespace)
 			if err != nil {
 				return estimate, err
 			}
-		err = deleteIngress(kubeClient.Extensions(), namespace)
-		if err != nil {
-			return estimate, err
 		}
 	}
 	return estimate, nil
@@ -254,7 +269,7 @@ func updateNamespaceStatusFunc(kubeClient client.Interface, namespace *api.Names
 }
 
 // syncNamespace orchestrates deletion of a Namespace and its associated content.
-func syncNamespace(kubeClient client.Interface, experimentalMode bool, namespace *api.Namespace) (err error) {
+func syncNamespace(kubeClient client.Interface, versions *api.APIVersions, namespace *api.Namespace) (err error) {
 	if namespace.DeletionTimestamp == nil {
 		return nil
 	}
@@ -280,7 +295,7 @@ func syncNamespace(kubeClient client.Interface, experimentalMode bool, namespace
 	}
 
 	// there may still be content for us to remove
-	estimate, err := deleteAllContent(kubeClient, experimentalMode, namespace.Name, *namespace.DeletionTimestamp)
+	estimate, err := deleteAllContent(kubeClient, versions, namespace.Name, *namespace.DeletionTimestamp)
 	if err != nil {
 		return err
 	}
@@ -515,3 +530,27 @@ func deleteIngress(expClient client.ExtensionsInterface, ns string) error {
 	}
 	return nil
 }
+
+// TODO: this is duplicated logic.  Move it somewhere central?
+func containsVersion(versions *api.APIVersions, version string) bool {
+	for ix := range versions.Versions {
+		if versions.Versions[ix] == version {
+			return true
+		}
+	}
+	return false
+}
+
+// TODO: this is duplicated logic.  Move it somewhere central?
+func containsResource(resources *api.APIResourceList, resourceName string) bool {
+	if resources == nil {
+		return false
+	}
+	for ix := range resources.APIResources {
+		resource := resources.APIResources[ix]
+		if resource.Name == resourceName {
+			return true
+		}
+	}
+	return false
+}

pkg/controller/namespace/namespace_controller_test.go

@@ -73,7 +73,7 @@ func TestFinalizeNamespaceFunc(t *testing.T) {
 	}
 }
 
-func testSyncNamespaceThatIsTerminating(t *testing.T, experimentalMode bool) {
+func testSyncNamespaceThatIsTerminating(t *testing.T, versions *api.APIVersions) {
 	mockClient := &testclient.Fake{}
 	now := unversioned.Now()
 	testNamespace := &api.Namespace{
@@ -89,7 +89,21 @@ func testSyncNamespaceThatIsTerminating(t *testing.T, experimentalMode bool) {
 			Phase: api.NamespaceTerminating,
 		},
 	}
-	err := syncNamespace(mockClient, experimentalMode, testNamespace)
+
+	if containsVersion(versions, "extensions/v1beta1") {
+		resources := []api.APIResource{}
+		for _, resource := range []string{"daemonsets", "deployments", "jobs", "horizontalpodautoscalers", "ingress"} {
+			resources = append(resources, api.APIResource{Name: resource})
+		}
+		mockClient.Resources = []api.APIResourceList{
+			{
+				GroupVersion: "extensions/v1beta1",
+				APIResources: resources,
+			},
+		}
+	}
+
+	err := syncNamespace(mockClient, versions, testNamespace)
 	if err != nil {
 		t.Errorf("Unexpected error when synching namespace %v", err)
 	}
@@ -108,13 +122,14 @@ func testSyncNamespaceThatIsTerminating(t *testing.T, experimentalMode bool) {
 		strings.Join([]string{"delete", "namespaces", ""}, "-"),
 	)
 
-	if experimentalMode {
+	if containsVersion(versions, "extensions/v1beta1") {
 		expectedActionSet.Insert(
-			strings.Join([]string{"list", "horizontalpodautoscalers", ""}, "-"),
 			strings.Join([]string{"list", "daemonsets", ""}, "-"),
 			strings.Join([]string{"list", "deployments", ""}, "-"),
 			strings.Join([]string{"list", "jobs", ""}, "-"),
+			strings.Join([]string{"list", "horizontalpodautoscalers", ""}, "-"),
 			strings.Join([]string{"list", "ingress", ""}, "-"),
+			strings.Join([]string{"get", "resource", ""}, "-"),
 		)
 	}
 
@@ -123,10 +138,10 @@ func testSyncNamespaceThatIsTerminating(t *testing.T, experimentalMode bool) {
 		actionSet.Insert(strings.Join([]string{action.GetVerb(), action.GetResource(), action.GetSubresource()}, "-"))
 	}
 	if !actionSet.HasAll(expectedActionSet.List()...) {
-		t.Errorf("Expected actions: %v, but got: %v", expectedActionSet, actionSet)
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, expectedActionSet.Difference(actionSet))
 	}
 	if !expectedActionSet.HasAll(actionSet.List()...) {
-		t.Errorf("Expected actions: %v, but got: %v", expectedActionSet, actionSet)
+		t.Errorf("Expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet, actionSet, actionSet.Difference(expectedActionSet))
 	}
 }
 
@@ -151,11 +166,11 @@ func TestRetryOnConflictError(t *testing.T) {
 }
 
 func TestSyncNamespaceThatIsTerminatingNonExperimental(t *testing.T) {
-	testSyncNamespaceThatIsTerminating(t, false)
+	testSyncNamespaceThatIsTerminating(t, &api.APIVersions{})
 }
 
-func TestSyncNamespaceThatIsTerminatingExperimental(t *testing.T) {
+func TestSyncNamespaceThatIsTerminatingV1Beta1(t *testing.T) {
-	testSyncNamespaceThatIsTerminating(t, true)
+	testSyncNamespaceThatIsTerminating(t, &api.APIVersions{Versions: []string{"extensions/v1beta1"}})
 }
 
 func TestSyncNamespaceThatIsActive(t *testing.T) {
@@ -172,7 +187,7 @@ func TestSyncNamespaceThatIsActive(t *testing.T) {
 			Phase: api.NamespaceActive,
 		},
 	}
-	err := syncNamespace(mockClient, false, testNamespace)
+	err := syncNamespace(mockClient, &api.APIVersions{}, testNamespace)
 	if err != nil {
 		t.Errorf("Unexpected error when synching namespace %v", err)
 	}
@@ -183,7 +198,8 @@ func TestSyncNamespaceThatIsActive(t *testing.T) {
 
 func TestRunStop(t *testing.T) {
 	mockClient := &testclient.Fake{}
-	nsController := NewNamespaceController(mockClient, false, 1*time.Second)
+
+	nsController := NewNamespaceController(mockClient, &api.APIVersions{}, 1*time.Second)
 
 	if nsController.StopEverything != nil {
 		t.Errorf("Non-running manager should not have a stop channel.  Got %v", nsController.StopEverything)