diff --git a/weed/filer/elastic/v7/elastic_store.go b/weed/filer/elastic/v7/elastic_store.go
index 8f2af25da..ec88e10a5 100644
--- a/weed/filer/elastic/v7/elastic_store.go
+++ b/weed/filer/elastic/v7/elastic_store.go
@@ -15,10 +15,10 @@ import (
 )
 
 var (
-	indexType           = "_doc"
-	indexPrefix         = ".seaweedfs_"
-	indexKV             = ".seaweedfs_kv_entries"
-	mappingWithoutQuery = ` {
+	indexType   = "_doc"
+	indexPrefix = ".seaweedfs_"
+	indexKV     = ".seaweedfs_kv_entries"
+	kvMappings  = ` {
 		     "mappings": {
 		   	"enabled": false,
 		       "properties": {
@@ -53,21 +53,7 @@ func (store *ElasticStore) GetName() string {
 }
 
 func (store *ElasticStore) Initialize(configuration weed_util.Configuration, prefix string) (err error) {
-	options := store.initialize(configuration, prefix)
-	store.client, err = elastic.NewClient(options...)
-	if err != nil {
-		return fmt.Errorf("init elastic %v.", err)
-	}
-	if ok, err := store.client.IndexExists(indexKV).Do(context.Background()); err == nil && !ok {
-		_, err = store.client.CreateIndex(indexKV).Body(mappingWithoutQuery).Do(context.Background())
-		if err != nil {
-			return fmt.Errorf("create index(%s) %v.", indexKV, err)
-		}
-	}
-	return nil
-}
-
-func (store *ElasticStore) initialize(configuration weed_util.Configuration, prefix string) (options []elastic.ClientOptionFunc) {
+	options := []elastic.ClientOptionFunc{}
 	servers := configuration.GetStringSlice(prefix + "servers")
 	options = append(options, elastic.SetURL(servers...))
 	username := configuration.GetString(prefix + "username")
@@ -82,7 +68,22 @@ func (store *ElasticStore) initialize(configuration weed_util.Configuration, pre
 		store.maxPageSize = 10000
 	}
 	glog.Infof("filer store elastic endpoints: %v.", servers)
-	return options
+	return store.initialize(options)
+}
+
+func (store *ElasticStore) initialize(options []elastic.ClientOptionFunc) (err error) {
+	ctx := context.Background()
+	store.client, err = elastic.NewClient(options...)
+	if err != nil {
+		return fmt.Errorf("init elastic %v.", err)
+	}
+	if ok, err := store.client.IndexExists(indexKV).Do(ctx); err == nil && !ok {
+		_, err = store.client.CreateIndex(indexKV).Body(kvMappings).Do(ctx)
+		if err != nil {
+			return fmt.Errorf("create index(%s) %v.", indexKV, err)
+		}
+	}
+	return nil
 }
 
 func (store *ElasticStore) BeginTransaction(ctx context.Context) (context.Context, error) {