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

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

plugin/pkg/admission/eventratelimit/cache.go

@@ -17,9 +17,8 @@ limitations under the License.
 package eventratelimit
 
 import (
-	"github.com/hashicorp/golang-lru"
-
 	"k8s.io/client-go/util/flowcontrol"
+	"k8s.io/utils/lru"
 )
 
 // cache is an interface for caching the limits of a particular type

plugin/pkg/admission/eventratelimit/cache_test.go

@@ -19,9 +19,8 @@ package eventratelimit
 import (
 	"testing"
 
-	"github.com/hashicorp/golang-lru"
-
 	"k8s.io/client-go/util/flowcontrol"
+	"k8s.io/utils/lru"
 )
 
 func TestSingleCache(t *testing.T) {
@@ -51,10 +50,7 @@ func TestLRUCache(t *testing.T) {
 		nextRateLimiter++
 		return rateLimiter
 	}
-	underlyingCache, err := lru.New(2)
-	if err != nil {
-		t.Fatalf("Could not create LRU cache: %v", err)
-	}
+	underlyingCache := lru.New(2)
 	cache := lruCache{
 		rateLimiterFactory: rateLimiterFactory,
 		cache:              underlyingCache,

plugin/pkg/admission/eventratelimit/limitenforcer.go

@@ -20,12 +20,11 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/hashicorp/golang-lru"
-
 	"k8s.io/apiserver/pkg/admission"
 	"k8s.io/client-go/util/flowcontrol"
 	api "k8s.io/kubernetes/pkg/apis/core"
 	eventratelimitapi "k8s.io/kubernetes/plugin/pkg/admission/eventratelimit/apis/eventratelimit"
+	"k8s.io/utils/lru"
 )
 
 const (
@@ -62,10 +61,7 @@ func newLimitEnforcer(config eventratelimitapi.Limit, clock flowcontrol.Clock) (
 	if cacheSize == 0 {
 		cacheSize = defaultCacheSize
 	}
-	underlyingCache, err := lru.New(cacheSize)
-	if err != nil {
-		return nil, fmt.Errorf("could not create lru cache: %v", err)
-	}
+	underlyingCache := lru.New(cacheSize)
 	cache := &lruCache{
 		rateLimiterFactory: rateLimiterFactory,
 		cache:              underlyingCache,

plugin/pkg/admission/limitranger/admission.go

@@ -24,8 +24,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/hashicorp/golang-lru"
-
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/api/resource"
@@ -39,6 +37,7 @@ import (
 	"k8s.io/client-go/kubernetes"
 	corev1listers "k8s.io/client-go/listers/core/v1"
 	api "k8s.io/kubernetes/pkg/apis/core"
+	"k8s.io/utils/lru"
 )
 
 const (
@@ -191,10 +190,7 @@ func (l *LimitRanger) GetLimitRanges(a admission.Attributes) ([]*corev1.LimitRan
 
 // NewLimitRanger returns an object that enforces limits based on the supplied limit function
 func NewLimitRanger(actions LimitRangerActions) (*LimitRanger, error) {
-	liveLookupCache, err := lru.New(10000)
-	if err != nil {
-		return nil, err
-	}
+	liveLookupCache := lru.New(10000)
 
 	if actions == nil {
 		actions = &DefaultLimitRangerActions{}