switch from golang-lru to the one in k8s.io/utils

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

Kubernetes-commit: 79d0c6cdc10293c9bfe644ce31dc186a936579b0

pkg/admission/plugin/resourcequota/resource_access.go

@@ -21,14 +21,13 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/hashicorp/golang-lru"
-
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apiserver/pkg/storage/etcd3"
 	"k8s.io/client-go/kubernetes"
 	corev1listers "k8s.io/client-go/listers/core/v1"
+	"k8s.io/utils/lru"
 )
 
 // QuotaAccessor abstracts the get/set logic from the rest of the Evaluator.  This could be a test stub, a straight passthrough,
@@ -61,14 +60,8 @@ type quotaAccessor struct {
 
 // newQuotaAccessor creates an object that conforms to the QuotaAccessor interface to be used to retrieve quota objects.
 func newQuotaAccessor() (*quotaAccessor, error) {
-	liveLookupCache, err := lru.New(100)
-	if err != nil {
-		return nil, err
-	}
-	updatedCache, err := lru.New(100)
-	if err != nil {
-		return nil, err
-	}
+	liveLookupCache := lru.New(100)
+	updatedCache := lru.New(100)
 
 	// client and lister will be set when SetInternalKubeClientSet and SetInternalKubeInformerFactory are invoked
 	return &quotaAccessor{

pkg/admission/plugin/resourcequota/resource_access_test.go

@@ -24,10 +24,10 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 
-	lru "github.com/hashicorp/golang-lru"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
+	"k8s.io/utils/lru"
 )
 
 func TestLRUCacheLookup(t *testing.T) {
@@ -86,10 +86,7 @@ func TestLRUCacheLookup(t *testing.T) {
 
 	for _, tc := range testcases {
 		t.Run(tc.description, func(t *testing.T) {
-			liveLookupCache, err := lru.New(1)
-			if err != nil {
-				t.Fatal(err)
-			}
+			liveLookupCache := lru.New(1)
 			kubeClient := fake.NewSimpleClientset(tc.clientInput...)
 			informerFactory := informers.NewSharedInformerFactory(kubeClient, 0)
 

pkg/storage/value/encrypt/envelope/envelope.go

@@ -26,8 +26,8 @@ import (
 	"time"
 
 	"k8s.io/apiserver/pkg/storage/value"
+	"k8s.io/utils/lru"
 
-	lru "github.com/hashicorp/golang-lru"
 	"golang.org/x/crypto/cryptobyte"
 )
 
@@ -64,14 +64,10 @@ type envelopeTransformer struct {
 func NewEnvelopeTransformer(envelopeService Service, cacheSize int, baseTransformerFunc func(cipher.Block) value.Transformer) (value.Transformer, error) {
 	var (
 		cache *lru.Cache
-		err   error
 	)
 
 	if cacheSize > 0 {
-		cache, err = lru.New(cacheSize)
-		if err != nil {
-			return nil, err
-		}
+		cache = lru.New(cacheSize)
 	}
 	return &envelopeTransformer{
 		envelopeService:     envelopeService,

pkg/util/webhook/client.go

@@ -25,13 +25,13 @@ import (
 	"net/url"
 	"strconv"
 
-	"github.com/hashicorp/golang-lru"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/apimachinery/pkg/runtime/serializer"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apiserver/pkg/util/x509metrics"
 	"k8s.io/client-go/rest"
+	"k8s.io/utils/lru"
 )
 
 const (
@@ -65,10 +65,7 @@ type ClientManager struct {
 
 // NewClientManager creates a clientManager.
 func NewClientManager(gvs []schema.GroupVersion, addToSchemaFuncs ...func(s *runtime.Scheme) error) (ClientManager, error) {
-	cache, err := lru.New(defaultCacheSize)
-	if err != nil {
-		return ClientManager{}, err
-	}
+	cache := lru.New(defaultCacheSize)
 	hookScheme := runtime.NewScheme()
 	for _, addToSchemaFunc := range addToSchemaFuncs {
 		if err := addToSchemaFunc(hookScheme); err != nil {