fix index slice append

src/modules/index/cache/indexdb.go

@@ -244,7 +244,7 @@ func IndexList() []*model.Instance {
 		return []*model.Instance{}
 	}
 
-	instances := make([]*model.Instance, len(activeIndexes))
+	var instances []*model.Instance
 	for _, instance := range activeIndexes {
 		if instance.Identity != identity.Identity {
 			instances = append(instances, instance)

src/modules/index/cache/metric_map.go

@@ -107,7 +107,7 @@ func (m *MetricIndexMap) GetMetrics() []string {
 	m.RLock()
 	defer m.RUnlock()
 
-	metrics := make([]string, len(m.Data))
+	var metrics []string
 	for k := range m.Data {
 		metrics = append(metrics, k)
 	}

src/modules/index/cache/tag_map.go

@@ -30,9 +30,9 @@ func (t *TagkvIndex) GetTagkv() []*TagPair {
 	t.RLock()
 	defer t.RUnlock()
 
-	tagkvs := make([]*TagPair, len(t.Tagkv))
+	var tagkvs []*TagPair
 	for k, vm := range t.Tagkv {
-		vs := make([]string, len(vm))
+		var vs []string
 		for v := range vm {
 			vs = append(vs, v)
 		}
@@ -52,7 +52,7 @@ func (t *TagkvIndex) GetTagkvMap() map[string][]string {
 
 	tagkvs := make(map[string][]string)
 	for k, vm := range t.Tagkv {
-		vs := make([]string, len(vm))
+		var vs []string
 		for v := range vm {
 			vs = append(vs, v)
 		}

src/modules/index/http/routes/index_router.go

@@ -123,7 +123,7 @@ func GetTagPairs(c *gin.Context) {
 		}
 
 		for tagk, tagvFilter := range tagkvFilter {
-			tagvs := make([]string, len(tagvFilter))
+			var tagvs []string
 			for v := range tagvFilter {
 				tagvs = append(tagvs, v)
 			}

src/modules/index/index.go

@@ -58,8 +58,8 @@ func main() {
 	tlogger.Init(cfg.Logger)
 	go stats.Init("n9e.index")
 
-	cache.InitDB(cfg.Cache)
 	identity.Init(cfg.Identity)
+	cache.InitDB(cfg.Cache)
 
 	go report.Init(cfg.Report, "monapi")
 	go rpc.Start()