apiserver add --lease-reuse-duration-seconds to config lease reuse du…

…ration

Signed-off-by: Ling Samuel <lingsamuelgrace@gmail.com>

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

@@ -155,12 +155,13 @@ func TestAddFlags(t *testing.T) {
 					TrustedCAFile: "/var/run/kubernetes/etcdca.crt",
 					CertFile:      "/var/run/kubernetes/etcdce.crt",
 				},
-				Paging:                true,
-				Prefix:                "/registry",
-				CompactionInterval:    storagebackend.DefaultCompactInterval,
-				CountMetricPollPeriod: time.Minute,
-				DBMetricPollInterval:  storagebackend.DefaultDBMetricPollInterval,
-				HealthcheckTimeout:    storagebackend.DefaultHealthcheckTimeout,
+				Paging:                    true,
+				Prefix:                    "/registry",
+				CompactionInterval:        storagebackend.DefaultCompactInterval,
+				CountMetricPollPeriod:     time.Minute,
+				DBMetricPollInterval:      storagebackend.DefaultDBMetricPollInterval,
+				HealthcheckTimeout:        storagebackend.DefaultHealthcheckTimeout,
+				LeaseReuseDurationSeconds: storagebackend.DefaultLeaseReuseDurationSeconds,
 			},
 			DefaultStorageMediaType: "application/vnd.kubernetes.protobuf",
 			DeleteCollectionWorkers: 1,

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

@@ -183,6 +183,9 @@ func (s *EtcdOptions) AddFlags(fs *pflag.FlagSet) {
 
 	fs.DurationVar(&s.StorageConfig.HealthcheckTimeout, "etcd-healthcheck-timeout", s.StorageConfig.HealthcheckTimeout,
 		"The timeout to use when checking etcd health.")
+
+	fs.Int64Var(&s.StorageConfig.LeaseReuseDurationSeconds, "lease-reuse-duration-seconds", s.StorageConfig.LeaseReuseDurationSeconds,
+		"The time in seconds that each lease is reused. A lower value could avoid large number of objects reusing the same lease. Notice that a too small value may cause performance problems at storage layer.")
 }
 
 func (s *EtcdOptions) ApplyTo(c *server.Config) error {

staging/src/k8s.io/apiserver/pkg/storage/etcd3/BUILD

@@ -35,6 +35,7 @@ go_test(
         "//staging/src/k8s.io/apiserver/pkg/apis/example/v1:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/features:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/storage/storagebackend:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage/testing:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage/value:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",

staging/src/k8s.io/apiserver/pkg/storage/etcd3/lease_manager.go

@@ -42,8 +42,8 @@ type leaseManager struct {
 }
 
 // newDefaultLeaseManager creates a new lease manager using default setting.
-func newDefaultLeaseManager(client *clientv3.Client) *leaseManager {
-	return newLeaseManager(client, 60, 0.05)
+func newDefaultLeaseManager(client *clientv3.Client, leaseReuseDurationSeconds int64) *leaseManager {
+	return newLeaseManager(client, leaseReuseDurationSeconds, 0.05)
 }
 
 // newLeaseManager creates a new lease manager with the number of buffered
@@ -57,14 +57,6 @@ func newLeaseManager(client *clientv3.Client, leaseReuseDurationSeconds int64, l
 	}
 }
 
-// setLeaseReuseDurationSeconds is used for testing purpose. It is used to
-// reduce the extra lease duration to avoid unnecessary timeout in testing.
-func (l *leaseManager) setLeaseReuseDurationSeconds(duration int64) {
-	l.leaseMu.Lock()
-	defer l.leaseMu.Unlock()
-	l.leaseReuseDurationSeconds = duration
-}
-
 // GetLease returns a lease based on requested ttl: if the cached previous
 // lease can be reused, reuse it; otherwise request a new one from etcd.
 func (l *leaseManager) GetLease(ctx context.Context, ttl int64) (clientv3.LeaseID, error) {

staging/src/k8s.io/apiserver/pkg/storage/etcd3/lease_manager_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package etcd3
 
 import (
+	"k8s.io/apiserver/pkg/storage/storagebackend"
 	"testing"
 )
 
@@ -34,7 +35,7 @@ func TestGetReuseDurationSeconds(t *testing.T) {
 			duration: 50,
 		},
 	}
-	lm := newDefaultLeaseManager(nil)
+	lm := newDefaultLeaseManager(nil, storagebackend.DefaultLeaseReuseDurationSeconds)
 	for i := 0; i < len(testCases); i++ {
 		dur := lm.getReuseDurationSecondsLocked(testCases[i].ttl)
 		if dur != testCases[i].duration {

staging/src/k8s.io/apiserver/pkg/storage/etcd3/store.go

@@ -83,11 +83,11 @@ type objState struct {
 }
 
 // New returns an etcd3 implementation of storage.Interface.
-func New(c *clientv3.Client, codec runtime.Codec, newFunc func() runtime.Object, prefix string, transformer value.Transformer, pagingEnabled bool) storage.Interface {
-	return newStore(c, newFunc, pagingEnabled, codec, prefix, transformer)
+func New(c *clientv3.Client, codec runtime.Codec, newFunc func() runtime.Object, prefix string, transformer value.Transformer, pagingEnabled bool, leaseReuseDurationSeconds int64) storage.Interface {
+	return newStore(c, newFunc, pagingEnabled, leaseReuseDurationSeconds, codec, prefix, transformer)
 }
 
-func newStore(c *clientv3.Client, newFunc func() runtime.Object, pagingEnabled bool, codec runtime.Codec, prefix string, transformer value.Transformer) *store {
+func newStore(c *clientv3.Client, newFunc func() runtime.Object, pagingEnabled bool, leaseReuseDurationSeconds int64, codec runtime.Codec, prefix string, transformer value.Transformer) *store {
 	versioner := APIObjectVersioner{}
 	result := &store{
 		client:        c,
@@ -100,7 +100,7 @@ func newStore(c *clientv3.Client, newFunc func() runtime.Object, pagingEnabled b
 		// keeps compatibility with etcd2 impl for custom prefixes that don't start with '/'
 		pathPrefix:   path.Join("/", prefix),
 		watcher:      newWatcher(c, codec, newFunc, versioner, transformer),
-		leaseManager: newDefaultLeaseManager(c),
+		leaseManager: newDefaultLeaseManager(c, leaseReuseDurationSeconds),
 	}
 	return result
 }

staging/src/k8s.io/apiserver/pkg/storage/etcd3/store_test.go

@@ -47,6 +47,7 @@ import (
 	examplev1 "k8s.io/apiserver/pkg/apis/example/v1"
 	"k8s.io/apiserver/pkg/features"
 	"k8s.io/apiserver/pkg/storage"
+	"k8s.io/apiserver/pkg/storage/storagebackend"
 	storagetesting "k8s.io/apiserver/pkg/storage/testing"
 	"k8s.io/apiserver/pkg/storage/value"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -823,7 +824,7 @@ func TestTransformationFailure(t *testing.T) {
 	codec := apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion)
 	cluster := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
 	defer cluster.Terminate(t)
-	store := newStore(cluster.RandClient(), newPod, false, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
+	store := newStore(cluster.RandClient(), newPod, false, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
 	ctx := context.Background()
 
 	preset := []struct {
@@ -900,8 +901,8 @@ func TestList(t *testing.T) {
 	codec := apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion)
 	cluster := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
 	defer cluster.Terminate(t)
-	store := newStore(cluster.RandClient(), newPod, true, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
-	disablePagingStore := newStore(cluster.RandClient(), newPod, false, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
+	store := newStore(cluster.RandClient(), newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
+	disablePagingStore := newStore(cluster.RandClient(), newPod, false, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
 	ctx := context.Background()
 
 	// Setup storage with the following structure:
@@ -1399,7 +1400,7 @@ func TestListContinuation(t *testing.T) {
 	etcdClient := cluster.RandClient()
 	recorder := &clientRecorder{KV: etcdClient.KV}
 	etcdClient.KV = recorder
-	store := newStore(etcdClient, newPod, true, codec, "", transformer)
+	store := newStore(etcdClient, newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", transformer)
 	ctx := context.Background()
 
 	// Setup storage with the following structure:
@@ -1561,7 +1562,7 @@ func TestListContinuationWithFilter(t *testing.T) {
 	etcdClient := cluster.RandClient()
 	recorder := &clientRecorder{KV: etcdClient.KV}
 	etcdClient.KV = recorder
-	store := newStore(etcdClient, newPod, true, codec, "", transformer)
+	store := newStore(etcdClient, newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", transformer)
 	ctx := context.Background()
 
 	preset := []struct {
@@ -1664,7 +1665,7 @@ func TestListInconsistentContinuation(t *testing.T) {
 	codec := apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion)
 	cluster := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
 	defer cluster.Terminate(t)
-	store := newStore(cluster.RandClient(), newPod, true, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
+	store := newStore(cluster.RandClient(), newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
 	ctx := context.Background()
 
 	// Setup storage with the following structure:
@@ -1809,12 +1810,11 @@ func TestListInconsistentContinuation(t *testing.T) {
 func testSetup(t *testing.T) (context.Context, *store, *integration.ClusterV3) {
 	codec := apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion)
 	cluster := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
-	store := newStore(cluster.RandClient(), newPod, true, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
-	ctx := context.Background()
 	// As 30s is the default timeout for testing in glboal configuration,
 	// we cannot wait longer than that in a single time: change it to 10
 	// for testing purposes. See apimachinery/pkg/util/wait/wait.go
-	store.leaseManager.setLeaseReuseDurationSeconds(1)
+	store := newStore(cluster.RandClient(), newPod, true, 1, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
+	ctx := context.Background()
 	return ctx, store, cluster
 }
 
@@ -1855,7 +1855,7 @@ func TestPrefix(t *testing.T) {
 		"/registry":         "/registry",
 	}
 	for configuredPrefix, effectivePrefix := range testcases {
-		store := newStore(cluster.RandClient(), nil, true, codec, configuredPrefix, transformer)
+		store := newStore(cluster.RandClient(), nil, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, configuredPrefix, transformer)
 		if store.pathPrefix != effectivePrefix {
 			t.Errorf("configured prefix of %s, expected effective prefix of %s, got %s", configuredPrefix, effectivePrefix, store.pathPrefix)
 		}
@@ -2022,7 +2022,7 @@ func TestConsistentList(t *testing.T) {
 	transformer := &fancyTransformer{
 		transformer: &prefixTransformer{prefix: []byte(defaultTestPrefix)},
 	}
-	store := newStore(cluster.RandClient(), newPod, true, codec, "", transformer)
+	store := newStore(cluster.RandClient(), newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", transformer)
 	transformer.store = store
 
 	for i := 0; i < 5; i++ {

staging/src/k8s.io/apiserver/pkg/storage/etcd3/watcher_test.go

@@ -38,6 +38,7 @@ import (
 	"k8s.io/apiserver/pkg/apis/example"
 	examplev1 "k8s.io/apiserver/pkg/apis/example/v1"
 	"k8s.io/apiserver/pkg/storage"
+	"k8s.io/apiserver/pkg/storage/storagebackend"
 )
 
 func TestWatch(t *testing.T) {
@@ -225,13 +226,13 @@ func TestWatchError(t *testing.T) {
 	codec := &testCodec{apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion)}
 	cluster := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 1})
 	defer cluster.Terminate(t)
-	invalidStore := newStore(cluster.RandClient(), newPod, true, codec, "", &prefixTransformer{prefix: []byte("test!")})
+	invalidStore := newStore(cluster.RandClient(), newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte("test!")})
 	ctx := context.Background()
 	w, err := invalidStore.Watch(ctx, "/abc", storage.ListOptions{ResourceVersion: "0", Predicate: storage.Everything})
 	if err != nil {
 		t.Fatalf("Watch failed: %v", err)
 	}
-	validStore := newStore(cluster.RandClient(), newPod, true, codec, "", &prefixTransformer{prefix: []byte("test!")})
+	validStore := newStore(cluster.RandClient(), newPod, true, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte("test!")})
 	validStore.GuaranteedUpdate(ctx, "/abc", &example.Pod{}, true, nil, storage.SimpleUpdate(
 		func(runtime.Object) (runtime.Object, error) {
 			return &example.Pod{ObjectMeta: metav1.ObjectMeta{Name: "foo"}}, nil
@@ -322,7 +323,7 @@ func TestProgressNotify(t *testing.T) {
 	}
 	cluster := integration.NewClusterV3(t, clusterConfig)
 	defer cluster.Terminate(t)
-	store := newStore(cluster.RandClient(), newPod, false, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
+	store := newStore(cluster.RandClient(), newPod, false, storagebackend.DefaultLeaseReuseDurationSeconds, codec, "", &prefixTransformer{prefix: []byte(defaultTestPrefix)})
 	ctx := context.Background()
 
 	key := "/somekey"

staging/src/k8s.io/apiserver/pkg/storage/storagebackend/config.go

@@ -28,9 +28,10 @@ const (
 	StorageTypeUnset = ""
 	StorageTypeETCD3 = "etcd3"
 
-	DefaultCompactInterval      = 5 * time.Minute
-	DefaultDBMetricPollInterval = 30 * time.Second
-	DefaultHealthcheckTimeout   = 2 * time.Second
+	DefaultCompactInterval           = 5 * time.Minute
+	DefaultDBMetricPollInterval      = 30 * time.Second
+	DefaultHealthcheckTimeout        = 2 * time.Second
+	DefaultLeaseReuseDurationSeconds = 60
 )
 
 // TransportConfig holds all connection related info,  i.e. equal TransportConfig means equal servers we talk to.
@@ -77,15 +78,18 @@ type Config struct {
 	DBMetricPollInterval time.Duration
 	// HealthcheckTimeout specifies the timeout used when checking health
 	HealthcheckTimeout time.Duration
+	// LeaseReuseDurationSeconds specifies time in seconds that each lease is reused. See pkg/storage/etcd3/lease_manager.go
+	LeaseReuseDurationSeconds int64
 }
 
 func NewDefaultConfig(prefix string, codec runtime.Codec) *Config {
 	return &Config{
-		Paging:               true,
-		Prefix:               prefix,
-		Codec:                codec,
-		CompactionInterval:   DefaultCompactInterval,
-		DBMetricPollInterval: DefaultDBMetricPollInterval,
-		HealthcheckTimeout:   DefaultHealthcheckTimeout,
+		Paging:                    true,
+		Prefix:                    prefix,
+		Codec:                     codec,
+		CompactionInterval:        DefaultCompactInterval,
+		DBMetricPollInterval:      DefaultDBMetricPollInterval,
+		HealthcheckTimeout:        DefaultHealthcheckTimeout,
+		LeaseReuseDurationSeconds: DefaultLeaseReuseDurationSeconds,
 	}
 }

staging/src/k8s.io/apiserver/pkg/storage/storagebackend/factory/etcd3.go

@@ -254,7 +254,7 @@ func newETCD3Storage(c storagebackend.Config, newFunc func() runtime.Object) (st
 	if transformer == nil {
 		transformer = value.IdentityTransformer
 	}
-	return etcd3.New(client, c.Codec, newFunc, c.Prefix, transformer, c.Paging), destroyFunc, nil
+	return etcd3.New(client, c.Codec, newFunc, c.Prefix, transformer, c.Paging, c.LeaseReuseDurationSeconds), destroyFunc, nil
 }
 
 // startDBSizeMonitorPerEndpoint starts a loop to monitor etcd database size and update the

staging/src/k8s.io/apiserver/pkg/storage/tests/BUILD

@@ -27,6 +27,7 @@ go_test(
         "//staging/src/k8s.io/apiserver/pkg/storage/cacher:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage/etcd3:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage/etcd3/testing:go_default_library",
+        "//staging/src/k8s.io/apiserver/pkg/storage/storagebackend:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage/testing:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/storage/value:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",

staging/src/k8s.io/apiserver/pkg/storage/tests/cacher_test.go

@@ -47,6 +47,7 @@ import (
 	cacherstorage "k8s.io/apiserver/pkg/storage/cacher"
 	"k8s.io/apiserver/pkg/storage/etcd3"
 	etcd3testing "k8s.io/apiserver/pkg/storage/etcd3/testing"
+	"k8s.io/apiserver/pkg/storage/storagebackend"
 	storagetesting "k8s.io/apiserver/pkg/storage/testing"
 	"k8s.io/apiserver/pkg/storage/value"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -105,7 +106,7 @@ func newPodList() runtime.Object { return &example.PodList{} }
 
 func newEtcdTestStorage(t *testing.T, prefix string) (*etcd3testing.EtcdTestServer, storage.Interface) {
 	server, _ := etcd3testing.NewUnsecuredEtcd3TestClientServer(t)
-	storage := etcd3.New(server.V3Client, apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion), newPod, prefix, value.IdentityTransformer, true)
+	storage := etcd3.New(server.V3Client, apitesting.TestCodec(codecs, examplev1.SchemeGroupVersion), newPod, prefix, value.IdentityTransformer, true, storagebackend.DefaultLeaseReuseDurationSeconds)
 	return server, storage
 }