acknowledge that creation of a restmapper can fail and that we cannot have a default

pkg/kubectl/cmd/apply_set_last_applied.go

@@ -46,7 +46,6 @@ type SetLastAppliedOptions struct {
 	FilenameOptions resource.FilenameOptions
 
 	infoList                     []*resource.Info
-	mapper                       meta.RESTMapper
 	namespace                    string
 	enforceNamespace             bool
 	dryRun                       bool
@@ -117,7 +116,6 @@ func (o *SetLastAppliedOptions) Complete(f cmdutil.Factory, cmd *cobra.Command)
 	o.output = cmdutil.GetFlagString(cmd, "output")
 	o.shortOutput = o.output == "name"
 
-	o.mapper = f.RESTMapper()
 	var err error
 	o.namespace, o.enforceNamespace, err = f.DefaultNamespace()
 	if err != nil {

pkg/kubectl/cmd/auth/cani.go

@@ -127,7 +127,10 @@ func (o *CanIOptions) Complete(f cmdutil.Factory, args []string) error {
 			break
 		}
 		resourceTokens := strings.SplitN(args[1], "/", 2)
-		restMapper := f.RESTMapper()
+		restMapper, err := f.RESTMapper()
+		if err != nil {
+			return err
+		}
 		o.Resource = o.resourceFor(restMapper, resourceTokens[0])
 		if len(resourceTokens) > 1 {
 			o.ResourceName = resourceTokens[1]

pkg/kubectl/cmd/autoscale.go

@@ -127,16 +127,20 @@ func NewCmdAutoscale(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *
 }
 
 func (o *AutoscaleOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
+	var err error
 	o.dryRun = cmdutil.GetFlagBool(cmd, "dry-run")
 	o.createAnnotation = cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag)
 	o.builder = f.NewBuilder()
 	o.canBeAutoscaled = f.CanBeAutoscaled
-	o.mapper = f.RESTMapper()
+	o.mapper, err = f.RESTMapper()
+	if err != nil {
+		return err
+	}
+
 	o.clientForMapping = f.ClientForMapping
 	o.args = args
 	o.RecordFlags.Complete(f.Command(cmd, false))
 
-	var err error
 	o.Recorder, err = o.RecordFlags.ToRecorder()
 	if err != nil {
 		return err

pkg/kubectl/cmd/create/create.go

@@ -389,7 +389,10 @@ func RunCreateSubcommand(f cmdutil.Factory, options *CreateSubcommandOptions) er
 	if err != nil {
 		return err
 	}
-	mapper := f.RESTMapper()
+	mapper, err := f.RESTMapper()
+	if err != nil {
+		return err
+	}
 	if !options.DryRun {
 		// create subcommands have compiled knowledge of things they create, so type them directly
 		gvks, _, err := legacyscheme.Scheme.ObjectKinds(obj)

pkg/kubectl/cmd/create/create_clusterrole_test.go

@@ -437,8 +437,12 @@ func TestClusterRoleValidate(t *testing.T) {
 
 	for name, test := range tests {
 		t.Run(name, func(t *testing.T) {
-			test.clusterRoleOptions.Mapper = tf.RESTMapper()
+			var err error
-			err := test.clusterRoleOptions.Validate()
+			test.clusterRoleOptions.Mapper, err = tf.RESTMapper()
+			if err != nil {
+				t.Fatal(err)
+			}
+			err = test.clusterRoleOptions.Validate()
 			if test.expectErr && err == nil {
 				t.Errorf("%s: expect error happens, but validate passes.", name)
 			}

pkg/kubectl/cmd/create/create_role.go

@@ -205,7 +205,10 @@ func (o *CreateRoleOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args
 	o.ResourceNames = resourceNames
 
 	// Complete other options for Run.
-	o.Mapper = f.RESTMapper()
+	o.Mapper, err = f.RESTMapper()
+	if err != nil {
+		return err
+	}
 
 	o.DryRun = cmdutil.GetDryRunFlag(cmd)
 	o.OutputFormat = cmdutil.GetFlagString(cmd, "output")

pkg/kubectl/cmd/create/create_role_test.go

@@ -339,8 +339,12 @@ func TestValidate(t *testing.T) {
 	}
 
 	for name, test := range tests {
-		test.roleOptions.Mapper = tf.RESTMapper()
+		var err error
-		err := test.roleOptions.Validate()
+		test.roleOptions.Mapper, err = tf.RESTMapper()
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = test.roleOptions.Validate()
 		if test.expectErr && err == nil {
 			t.Errorf("%s: expect error happens but validate passes.", name)
 		}

pkg/kubectl/cmd/drain.go

@@ -29,7 +29,6 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	policyv1beta1 "k8s.io/api/policy/v1beta1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
-	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/labels"
@@ -68,7 +67,6 @@ type DrainOptions struct {
 	DeleteLocalData    bool
 	Selector           string
 	PodSelector        string
-	mapper             meta.RESTMapper
 	nodeInfos          []*resource.Info
 	typer              runtime.ObjectTyper
 

pkg/kubectl/cmd/drain_test.go

@@ -836,7 +836,6 @@ func TestDeletePods(t *testing.T) {
 			o := DrainOptions{
 				PrintFlags: printers.NewPrintFlags("drained"),
 			}
-			o.mapper = tf.RESTMapper()
 			o.Out = os.Stdout
 
 			o.ToPrinter = func(operation string) (printers.ResourcePrinterFunc, error) {

pkg/kubectl/cmd/explain.go

@@ -91,12 +91,16 @@ func NewCmdExplain(parent string, f cmdutil.Factory, streams genericclioptions.I
 }
 
 func (o *ExplainOptions) Complete(f cmdutil.Factory, cmd *cobra.Command) error {
+	var err error
+
 	o.Recursive = cmdutil.GetFlagBool(cmd, "recursive")
 	o.ApiVersion = cmdutil.GetFlagString(cmd, "api-version")
 
-	o.Mapper = f.RESTMapper()
+	o.Mapper, err = f.RESTMapper()
+	if err != nil {
+		return err
+	}
 
-	var err error
 	o.Schema, err = f.OpenAPISchema()
 	if err != nil {
 		return err

pkg/kubectl/cmd/expose.go

@@ -187,7 +187,10 @@ func (o *ExposeServiceOptions) Complete(f cmdutil.Factory, cmd *cobra.Command) e
 	o.MapBasedSelectorForObject = f.MapBasedSelectorForObject
 	o.PortsForObject = f.PortsForObject
 	o.ProtocolsForObject = f.ProtocolsForObject
-	o.Mapper = f.RESTMapper()
+	o.Mapper, err = f.RESTMapper()
+	if err != nil {
+		return err
+	}
 	o.LabelsForObject = f.LabelsForObject
 
 	o.Namespace, o.EnforceNamespace, err = f.DefaultNamespace()

pkg/kubectl/cmd/rollout/rollout_pause.go

@@ -21,7 +21,6 @@ import (
 
 	"github.com/spf13/cobra"
 
-	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/types"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
@@ -43,7 +42,6 @@ type PauseConfig struct {
 	ToPrinter  func(string) (printers.ResourcePrinterFunc, error)
 
 	Pauser func(info *resource.Info) ([]byte, error)
-	Mapper meta.RESTMapper
 	Infos  []*resource.Info
 
 	genericclioptions.IOStreams
@@ -105,8 +103,6 @@ func (o *PauseConfig) CompletePause(f cmdutil.Factory, cmd *cobra.Command, args
 		return cmdutil.UsageErrorf(cmd, "%s", cmd.Use)
 	}
 
-	o.Mapper = f.RESTMapper()
-
 	o.Pauser = f.Pauser
 
 	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()

pkg/kubectl/cmd/rollout/rollout_resume.go

@@ -21,7 +21,6 @@ import (
 
 	"github.com/spf13/cobra"
 
-	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/types"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
@@ -43,7 +42,6 @@ type ResumeConfig struct {
 	ToPrinter  func(string) (printers.ResourcePrinterFunc, error)
 
 	Resumer func(object *resource.Info) ([]byte, error)
-	Mapper  meta.RESTMapper
 	Infos   []*resource.Info
 
 	genericclioptions.IOStreams
@@ -103,8 +101,6 @@ func (o *ResumeConfig) CompleteResume(f cmdutil.Factory, cmd *cobra.Command, arg
 		return cmdutil.UsageErrorf(cmd, "%s", cmd.Use)
 	}
 
-	o.Mapper = f.RESTMapper()
-
 	o.Resumer = f.Resumer
 
 	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()

pkg/kubectl/cmd/rollout/rollout_undo.go

@@ -19,7 +19,6 @@ package rollout
 import (
 	"io"
 
-	"k8s.io/apimachinery/pkg/api/meta"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	"k8s.io/kubernetes/pkg/kubectl"
@@ -41,7 +40,6 @@ type UndoOptions struct {
 	ToPrinter  func(string) (printers.ResourcePrinterFunc, error)
 
 	Rollbackers []kubectl.Rollbacker
-	Mapper      meta.RESTMapper
 	Infos       []*resource.Info
 	ToRevision  int64
 	DryRun      bool
@@ -107,7 +105,6 @@ func (o *UndoOptions) CompleteUndo(f cmdutil.Factory, cmd *cobra.Command, out io
 	}
 
 	o.ToRevision = cmdutil.GetFlagInt64(cmd, "to-revision")
-	o.Mapper = f.RESTMapper()
 	o.Out = out
 	o.DryRun = cmdutil.GetDryRunFlag(cmd)
 

pkg/kubectl/cmd/run.go

@@ -643,7 +643,10 @@ func (o *RunOptions) createGeneratedObject(f cmdutil.Factory, cmd *cobra.Command
 		return nil, err
 	}
 
-	mapper := f.RESTMapper()
+	mapper, err := f.RESTMapper()
+	if err != nil {
+		return nil, err
+	}
 	// run has compiled knowledge of the thing is is creating
 	groupVersionKinds, _, err := legacyscheme.Scheme.ObjectKinds(obj)
 	if err != nil {

pkg/kubectl/cmd/set/set_selector.go

@@ -59,7 +59,6 @@ type SetSelectorOptions struct {
 	Recorder genericclioptions.Recorder
 
 	builder *resource.Builder
-	mapper  meta.RESTMapper
 
 	genericclioptions.IOStreams
 }
@@ -140,9 +139,6 @@ func (o *SetSelectorOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, arg
 		return err
 	}
 
-	mapper := f.RESTMapper()
-	o.mapper = mapper
-
 	o.resources, o.selector, err = getResourcesAndSelector(args)
 	if err != nil {
 		return err

pkg/kubectl/cmd/testing/fake.go

@@ -338,7 +338,7 @@ func (f *TestFactory) Command(*cobra.Command, bool) string {
 }
 
 func (f *TestFactory) NewBuilder() *resource.Builder {
-	mapper := f.RESTMapper()
+	mapper, err := f.RESTMapper()
 
 	return resource.NewBuilder(
 		&resource.Mapper{
@@ -352,7 +352,7 @@ func (f *TestFactory) NewBuilder() *resource.Builder {
 			Decoder:      unstructured.UnstructuredJSONScheme,
 		},
 		f.CategoryExpander(),
-	)
+	).AddError(err)
 }
 
 func (f *TestFactory) KubernetesClientSet() (*kubernetes.Clientset, error) {
@@ -426,7 +426,7 @@ func (f *TestFactory) ClientSetForVersion(requiredVersion *schema.GroupVersion)
 	return f.ClientSet()
 }
 
-func (f *TestFactory) RESTMapper() meta.RESTMapper {
+func (f *TestFactory) RESTMapper() (meta.RESTMapper, error) {
 	groupResources := testDynamicResources()
 	mapper := discovery.NewRESTMapper(groupResources)
 	// for backwards compatibility with existing tests, allow rest mappings from the scheme to show up
@@ -441,7 +441,7 @@ func (f *TestFactory) RESTMapper() meta.RESTMapper {
 	// TODO: should probably be the external scheme
 	fakeDs := &fakeCachedDiscoveryClient{}
 	expander := cmdutil.NewShortcutExpander(mapper, fakeDs)
-	return expander
+	return expander, nil
 }
 
 func (f *TestFactory) LogsForObject(object, options runtime.Object, timeout time.Duration) (*restclient.Request, error) {

pkg/kubectl/cmd/util/factory.go

@@ -164,7 +164,7 @@ type ClientAccessFactory interface {
 // Generally they provide object typing and functions that build requests based on the negotiated clients.
 type ObjectMappingFactory interface {
 	// Returns interfaces for dealing with arbitrary runtime.Objects.
-	RESTMapper() meta.RESTMapper
+	RESTMapper() (meta.RESTMapper, error)
 	// Returns interface for expanding categories like `all`.
 	CategoryExpander() categories.CategoryExpander
 	// Returns a RESTClient for working with the specified RESTMapping or an error. This is intended

pkg/kubectl/cmd/util/factory_builder.go

@@ -47,7 +47,7 @@ func NewBuilderFactory(clientAccessFactory ClientAccessFactory, objectMappingFac
 // NewBuilder returns a new resource builder for structured api objects.
 func (f *ring2Factory) NewBuilder() *resource.Builder {
 	clientMapperFunc := resource.ClientMapperFunc(f.objectMappingFactory.ClientForMapping)
-	mapper := f.objectMappingFactory.RESTMapper()
+	mapper, mapperErr := f.objectMappingFactory.RESTMapper()
 
 	unstructuredClientMapperFunc := resource.ClientMapperFunc(f.objectMappingFactory.UnstructuredClientForMapping)
 
@@ -65,7 +65,7 @@ func (f *ring2Factory) NewBuilder() *resource.Builder {
 			Decoder:      unstructured.UnstructuredJSONScheme,
 		},
 		categoryExpander,
-	)
+	).AddError(mapperErr)
 }
 
 // PluginLoader loads plugins from a path set by the KUBECTL_PLUGINS_PATH env var.
@@ -97,7 +97,11 @@ func (f *ring2Factory) ScaleClient() (scaleclient.ScalesGetter, error) {
 		return nil, err
 	}
 	resolver := scaleclient.NewDiscoveryScaleKindResolver(discoClient)
-	mapper := f.objectMappingFactory.RESTMapper()
+	mapper, err := f.objectMappingFactory.RESTMapper()
+	if err != nil {
+		return nil, err
+	}
+
 	return scaleclient.New(restClient, mapper, dynamic.LegacyAPIPathResolverFunc, resolver), nil
 }
 

pkg/kubectl/cmd/util/factory_object_mapping.go

@@ -69,11 +69,8 @@ func NewObjectMappingFactory(clientAccessFactory ClientAccessFactory) ObjectMapp
 	return f
 }
 
-// objectLoader attempts to perform discovery against the server, and will fall back to
+// RESTMapper returns a mapper.
-// the built in mapper if necessary. It supports unstructured objects either way, since
+func (f *ring1Factory) RESTMapper() (meta.RESTMapper, error) {
-// the underlying Scheme supports Unstructured. The mapper will return converters that can
-// convert versioned types to unstructured and back.
-func (f *ring1Factory) restMapper() (meta.RESTMapper, error) {
 	discoveryClient, err := f.clientAccessFactory.DiscoveryClient()
 	if err != nil {
 		return nil, err
@@ -83,11 +80,7 @@ func (f *ring1Factory) restMapper() (meta.RESTMapper, error) {
 	mapper := discovery.NewDeferredDiscoveryRESTMapper(discoveryClient)
 	// TODO: should this also indicate it recognizes typed objects?
 	expander := NewShortcutExpander(mapper, discoveryClient)
-	return expander, err
+	return expander, nil
-}
-
-func (f *ring1Factory) RESTMapper() meta.RESTMapper {
-	return meta.NewLazyRESTMapperLoader(f.restMapper)
 }
 
 func (f *ring1Factory) CategoryExpander() categories.CategoryExpander {

pkg/kubectl/cmd/util/factory_test.go

@@ -35,6 +35,7 @@ import (
 	"k8s.io/apimachinery/pkg/watch"
 	manualfake "k8s.io/client-go/rest/fake"
 	testcore "k8s.io/client-go/testing"
+	"k8s.io/kubernetes/pkg/api/legacyscheme"
 	"k8s.io/kubernetes/pkg/api/testapi"
 	api "k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"

pkg/kubectl/resource/builder.go

@@ -56,6 +56,9 @@ type Builder struct {
 	// it does not ever need to rely upon discovery.
 	objectTyper runtime.ObjectTyper
 
+	// local indicates that we cannot make server calls
+	local bool
+
 	errs []error
 
 	paths  []Visitor
@@ -142,6 +145,14 @@ func (b *Builder) Schema(schema validation.Schema) *Builder {
 	return b
 }
 
+func (b *Builder) AddError(err error) *Builder {
+	if err == nil {
+		return b
+	}
+	b.errs = append(b.errs, err)
+	return b
+}
+
 // FilenameParam groups input in two categories: URLs and files (files, directories, STDIN)
 // If enforceNamespace is false, namespaces in the specs will be allowed to
 // override the default namespace. If it is true, namespaces that don't match
@@ -192,6 +203,7 @@ func (b *Builder) Unstructured() *Builder {
 		return b
 	}
 	b.mapper = b.unstructured
+	b.mapper.localFn = b.isLocal
 
 	b.objectTyper = unstructuredscheme.NewUnstructuredObjectTyper()
 	return b
@@ -212,6 +224,7 @@ func (b *Builder) Internal(typer runtime.ObjectTyper) *Builder {
 		return b
 	}
 	b.mapper = b.internal
+	b.mapper.localFn = b.isLocal
 
 	b.objectTyper = typer
 	return b
@@ -227,12 +240,17 @@ func (b *Builder) LocalParam(local bool) *Builder {
 
 // Local will avoid asking the server for results.
 func (b *Builder) Local() *Builder {
+	b.local = true
 	mapper := *b.mapper
 	mapper.ClientMapper = DisabledClientForMapping{ClientMapper: mapper.ClientMapper}
 	b.mapper = &mapper
 	return b
 }
 
+func (b *Builder) isLocal() bool {
+	return b.local
+}
+
 // Mapper returns a copy of the current mapper.
 func (b *Builder) Mapper() *Mapper {
 	mapper := *b.mapper

pkg/kubectl/resource/interfaces.go

@@ -22,6 +22,8 @@ import (
 	client "k8s.io/client-go/rest"
 )
 
+type RESTMapperFunc func() (meta.RESTMapper, error)
+
 // RESTClient is a client helper for dealing with RESTful resources
 // in a generic way.
 type RESTClient interface {

pkg/kubectl/resource/mapper.go

@@ -28,6 +28,9 @@ import (
 // Mapper is a convenience struct for holding references to the interfaces
 // needed to create Info for arbitrary objects.
 type Mapper struct {
+	// localFn indicates the call can't make server requests
+	localFn func() bool
+
 	RESTMapper   meta.RESTMapper
 	ClientMapper ClientMapper
 	Decoder      runtime.Decoder
@@ -42,31 +45,34 @@ func (m *Mapper) InfoForData(data []byte, source string) (*Info, error) {
 		return nil, fmt.Errorf("unable to decode %q: %v", source, err)
 	}
 
-	mapping, err := m.RESTMapper.RESTMapping(gvk.GroupKind(), gvk.Version)
-	if err != nil {
-		return nil, fmt.Errorf("unable to recognize %q: %v", source, err)
-	}
-
-	client, err := m.ClientMapper.ClientForMapping(mapping)
-	if err != nil {
-		return nil, fmt.Errorf("unable to connect to a server to handle %q: %v", mapping.Resource, err)
-	}
-
 	name, _ := metadataAccessor.Name(obj)
 	namespace, _ := metadataAccessor.Namespace(obj)
 	resourceVersion, _ := metadataAccessor.ResourceVersion(obj)
 
-	return &Info{
+	ret := &Info{
-		Client:  client,
-		Mapping: mapping,
-
 		Source:          source,
 		Namespace:       namespace,
 		Name:            name,
 		ResourceVersion: resourceVersion,
 
 		Object: obj,
-	}, nil
+	}
+
+	if m.localFn == nil || !m.localFn() {
+		mapping, err := m.RESTMapper.RESTMapping(gvk.GroupKind(), gvk.Version)
+		if err != nil {
+			return nil, fmt.Errorf("unable to recognize %q: %v", source, err)
+		}
+		ret.Mapping = mapping
+
+		client, err := m.ClientMapper.ClientForMapping(mapping)
+		if err != nil {
+			return nil, fmt.Errorf("unable to connect to a server to handle %q: %v", mapping.Resource, err)
+		}
+		ret.Client = client
+	}
+
+	return ret, nil
 }
 
 // InfoForObject creates an Info object for the given Object. An error is returned
@@ -78,33 +84,37 @@ func (m *Mapper) InfoForObject(obj runtime.Object, typer runtime.ObjectTyper, pr
 		return nil, fmt.Errorf("unable to get type info from the object %q: %v", reflect.TypeOf(obj), err)
 	}
 
-	groupVersionKind := groupVersionKinds[0]
+	gvk := groupVersionKinds[0]
 	if len(groupVersionKinds) > 1 && len(preferredGVKs) > 0 {
-		groupVersionKind = preferredObjectKind(groupVersionKinds, preferredGVKs)
+		gvk = preferredObjectKind(groupVersionKinds, preferredGVKs)
 	}
 
-	mapping, err := m.RESTMapper.RESTMapping(groupVersionKind.GroupKind(), groupVersionKind.Version)
-	if err != nil {
-		return nil, fmt.Errorf("unable to recognize %v: %v", groupVersionKind, err)
-	}
-
-	client, err := m.ClientMapper.ClientForMapping(mapping)
-	if err != nil {
-		return nil, fmt.Errorf("unable to connect to a server to handle %q: %v", mapping.Resource, err)
-	}
 	name, _ := metadataAccessor.Name(obj)
 	namespace, _ := metadataAccessor.Namespace(obj)
 	resourceVersion, _ := metadataAccessor.ResourceVersion(obj)
-	return &Info{
+	ret := &Info{
-		Client:  client,
-		Mapping: mapping,
-
 		Namespace:       namespace,
 		Name:            name,
 		ResourceVersion: resourceVersion,
 
 		Object: obj,
-	}, nil
+	}
+
+	if m.localFn == nil || !m.localFn() {
+		mapping, err := m.RESTMapper.RESTMapping(gvk.GroupKind(), gvk.Version)
+		if err != nil {
+			return nil, fmt.Errorf("unable to recognize %v", err)
+		}
+		ret.Mapping = mapping
+
+		client, err := m.ClientMapper.ClientForMapping(mapping)
+		if err != nil {
+			return nil, fmt.Errorf("unable to connect to a server to handle %q: %v", mapping.Resource, err)
+		}
+		ret.Client = client
+	}
+
+	return ret, nil
 }
 
 // preferredObjectKind picks the possibility that most closely matches the priority list in this order:

test/integration/apiserver/print_test.go

@@ -147,8 +147,11 @@ func TestServerSidePrint(t *testing.T) {
 	printer := newFakePrinter(printersinternal.AddHandlers)
 
 	factory := util.NewFactory(clientcmd.NewDefaultClientConfig(*createKubeConfig(s.URL), &clientcmd.ConfigOverrides{}))
-	mapper := factory.RESTMapper()
+	mapper, err := factory.RESTMapper()
-
+	if err != nil {
+		t.Errorf("unexpected error getting mapper: %v", err)
+		return
+	}
 	for gvk, apiType := range legacyscheme.Scheme.AllKnownTypes() {
 		// we do not care about internal objects or lists // TODO make sure this is always true
 		if gvk.Version == runtime.APIVersionInternal || strings.HasSuffix(apiType.Name(), "List") {

test/integration/etcd/etcd_storage_path_test.go

@@ -811,7 +811,10 @@ func startRealMasterOrDie(t *testing.T, certDir string) (*allClient, clientv3.KV
 		t.Fatal(err)
 	}
 
-	mapper := util.NewFactory(clientcmd.NewDefaultClientConfig(*clientcmdapi.NewConfig(), &clientcmd.ConfigOverrides{})).RESTMapper()
+	mapper, err := util.NewFactory(clientcmd.NewDefaultClientConfig(*clientcmdapi.NewConfig(), &clientcmd.ConfigOverrides{})).RESTMapper()
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	return client, kvClient, mapper
 }