move initializer to the generic apiserver

move k8s.io/kubernetes/plugin/pkg/admission/initialization to
k8s.io/apiserver/pkg/admission/plugin/initialization/initialization.go;
move k8s.io/kubernetes/pkg/kubeapiserver/admission/configuration to
k8s.io/apiserver/pkg/admission/configuration.

cmd/kube-apiserver/app/options/options_test.go

@@ -103,7 +103,8 @@ func TestAddFlags(t *testing.T) {
 			MinRequestTimeout:           1800,
 		},
 		Admission: &apiserveroptions.AdmissionOptions{
-			RecommendedPluginOrder: []string{"NamespaceLifecycle"},
+			RecommendedPluginOrder: []string{"NamespaceLifecycle", "Initializers"},
+			DefaultOffPlugins:      []string{"Initializers"},
 			PluginNames:            []string{"AlwaysDeny"},
 			ConfigFile:             "/admission-control-config",
 			Plugins:                s.Admission.Plugins,

cmd/kube-apiserver/app/options/plugins.go

@@ -34,7 +34,6 @@ import (
 	"k8s.io/kubernetes/plugin/pkg/admission/exec"
 	"k8s.io/kubernetes/plugin/pkg/admission/gc"
 	"k8s.io/kubernetes/plugin/pkg/admission/imagepolicy"
-	"k8s.io/kubernetes/plugin/pkg/admission/initialization"
 	"k8s.io/kubernetes/plugin/pkg/admission/initialresources"
 	"k8s.io/kubernetes/plugin/pkg/admission/limitranger"
 	"k8s.io/kubernetes/plugin/pkg/admission/namespace/autoprovision"
@@ -65,7 +64,6 @@ func RegisterAllAdmissionPlugins(plugins *admission.Plugins) {
 	exec.Register(plugins)
 	gc.Register(plugins)
 	imagepolicy.Register(plugins)
-	initialization.Register(plugins)
 	initialresources.Register(plugins)
 	limitranger.Register(plugins)
 	autoprovision.Register(plugins)

federation/cmd/federation-apiserver/app/plugins.go

@@ -29,7 +29,6 @@ import (
 	"k8s.io/kubernetes/plugin/pkg/admission/admit"
 	"k8s.io/kubernetes/plugin/pkg/admission/deny"
 	"k8s.io/kubernetes/plugin/pkg/admission/gc"
-	"k8s.io/kubernetes/plugin/pkg/admission/initialization"
 )
 
 // RegisterAllAdmissionPlugins registers all admission plugins
@@ -37,6 +36,5 @@ func RegisterAllAdmissionPlugins(plugins *admission.Plugins) {
 	admit.Register(plugins)
 	deny.Register(plugins)
 	gc.Register(plugins)
-	initialization.Register(plugins)
 	schedulingpolicy.Register(plugins)
 }

plugin/pkg/admission/webhook/admission.go

@@ -38,13 +38,13 @@ import (
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/apiserver/pkg/admission/configuration"
 	genericadmissioninit "k8s.io/apiserver/pkg/admission/initializer"
 	clientset "k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	"k8s.io/kubernetes/pkg/api"
 	admissionv1alpha1helper "k8s.io/kubernetes/pkg/apis/admission/v1alpha1"
 	admissioninit "k8s.io/kubernetes/pkg/kubeapiserver/admission"
-	"k8s.io/kubernetes/pkg/kubeapiserver/admission/configuration"
 
 	// install the clientgo admission API for use with api registry
 	_ "k8s.io/kubernetes/pkg/apis/admission/install"

staging/src/k8s.io/apiserver/pkg/admission/plugin/initialization/initialization.go

@@ -24,6 +24,7 @@ import (
 	"github.com/golang/glog"
 
 	"k8s.io/api/admissionregistration/v1alpha1"
+	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/api/validation"
@@ -32,17 +33,21 @@ import (
 	"k8s.io/apimachinery/pkg/util/validation/field"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/apiserver/pkg/admission/configuration"
 	"k8s.io/apiserver/pkg/authorization/authorizer"
 	"k8s.io/apiserver/pkg/features"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	clientset "k8s.io/client-go/kubernetes"
-	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/kubeapiserver/admission/configuration"
+)
+
+const (
+	// Name of admission plug-in
+	PluginName = "Initializers"
 )
 
 // Register registers a plugin
 func Register(plugins *admission.Plugins) {
-	plugins.Register("Initializers", func(config io.Reader) (admission.Interface, error) {
+	plugins.Register(PluginName, func(config io.Reader) (admission.Interface, error) {
 		return NewInitializer(), nil
 	})
 }
@@ -183,8 +188,13 @@ func (i *initializer) Admit(a admission.Attributes) (err error) {
 			// Mirror pods are exempt from initialization because they are created and initialized
 			// on the Kubelet before they appear in the API.
 			// TODO: once this moves to REST storage layer, this becomes a pod specific concern
-			if pod, ok := a.GetObject().(*api.Pod); ok && pod != nil {
-				if _, isMirror := pod.Annotations[api.MirrorPodAnnotationKey]; isMirror {
+			if a.GetKind().GroupKind() == v1.SchemeGroupVersion.WithKind("Pod").GroupKind() {
+				accessor, err := meta.Accessor(a.GetObject())
+				if err != nil {
+					return err
+				}
+				annotations := accessor.GetAnnotations()
+				if _, isMirror := annotations[v1.MirrorPodAnnotationKey]; isMirror {
 					return nil
 				}
 			}

staging/src/k8s.io/apiserver/pkg/server/options/admission.go

@@ -23,6 +23,7 @@ import (
 	"github.com/spf13/pflag"
 	"k8s.io/apiserver/pkg/admission"
 	"k8s.io/apiserver/pkg/admission/initializer"
+	"k8s.io/apiserver/pkg/admission/plugin/initialization"
 	"k8s.io/apiserver/pkg/admission/plugin/namespace/lifecycle"
 	"k8s.io/apiserver/pkg/server"
 	"k8s.io/client-go/informers"
@@ -53,7 +54,8 @@ func NewAdmissionOptions() *AdmissionOptions {
 	options := &AdmissionOptions{
 		Plugins:                &admission.Plugins{},
 		PluginNames:            []string{},
-		RecommendedPluginOrder: []string{lifecycle.PluginName},
+		RecommendedPluginOrder: []string{lifecycle.PluginName, initialization.PluginName},
+		DefaultOffPlugins:      []string{initialization.PluginName},
 	}
 	server.RegisterAllAdmissionPlugins(options.Plugins)
 	return options

staging/src/k8s.io/apiserver/pkg/server/options/admission_test.go

@@ -56,7 +56,7 @@ func TestEnabledPluginNamesMethod(t *testing.T) {
 			actualPluginNames := target.enabledPluginNames()
 
 			if len(actualPluginNames) != len(scenario.expectedPluginNames) {
-				t.Errorf("incorrect number of items, got %d, expected = %d", len(actualPluginNames), len(scenario.expectedPluginNames))
+				t.Fatalf("incorrect number of items, got %d, expected = %d", len(actualPluginNames), len(scenario.expectedPluginNames))
 			}
 			for i := range actualPluginNames {
 				if scenario.expectedPluginNames[i] != actualPluginNames[i] {

staging/src/k8s.io/apiserver/pkg/server/plugins.go

@@ -19,10 +19,12 @@ package server
 // This file exists to force the desired plugin implementations to be linked into genericapi pkg.
 import (
 	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/apiserver/pkg/admission/plugin/initialization"
 	"k8s.io/apiserver/pkg/admission/plugin/namespace/lifecycle"
 )
 
 // RegisterAllAdmissionPlugins registers all admission plugins
 func RegisterAllAdmissionPlugins(plugins *admission.Plugins) {
 	lifecycle.Register(plugins)
+	initialization.Register(plugins)
 }