diff --git a/pkg/cluster/spec/alertmanager.go b/pkg/cluster/spec/alertmanager.go
index 722d91952d..a220715494 100644
--- a/pkg/cluster/spec/alertmanager.go
+++ b/pkg/cluster/spec/alertmanager.go
@@ -91,6 +91,7 @@ func (c *AlertManagerComponent) Instances() []Instance {
 	ins := make([]Instance, 0, len(alertmanagers))
 
 	for _, s := range alertmanagers {
+		s := s
 		ins = append(ins, &AlertManagerInstance{
 			BaseInstance: BaseInstance{
 				InstanceSpec: s,
diff --git a/pkg/cluster/spec/grafana.go b/pkg/cluster/spec/grafana.go
index 6158dd0eb6..53a9dfe8e2 100644
--- a/pkg/cluster/spec/grafana.go
+++ b/pkg/cluster/spec/grafana.go
@@ -99,6 +99,7 @@ func (c *GrafanaComponent) Instances() []Instance {
 	ins := make([]Instance, 0, len(servers))
 
 	for _, s := range servers {
+		s := s
 		ins = append(ins, &GrafanaInstance{
 			BaseInstance: BaseInstance{
 				InstanceSpec: s,
diff --git a/pkg/cluster/spec/monitoring.go b/pkg/cluster/spec/monitoring.go
index da01b25c44..9f0de67fcc 100644
--- a/pkg/cluster/spec/monitoring.go
+++ b/pkg/cluster/spec/monitoring.go
@@ -112,6 +112,7 @@ func (c *MonitorComponent) Instances() []Instance {
 	ins := make([]Instance, 0, len(servers))
 
 	for _, s := range servers {
+		s := s
 		mi := &MonitorInstance{BaseInstance{
 			InstanceSpec: s,
 			Name:         c.Name(),
diff --git a/pkg/cluster/spec/tispark.go b/pkg/cluster/spec/tispark.go
index eb16fa550d..bc9199d77d 100644
--- a/pkg/cluster/spec/tispark.go
+++ b/pkg/cluster/spec/tispark.go
@@ -135,6 +135,7 @@ func (c *TiSparkMasterComponent) Role() string {
 func (c *TiSparkMasterComponent) Instances() []Instance {
 	ins := make([]Instance, 0, len(c.Topology.TiSparkMasters))
 	for _, s := range c.Topology.TiSparkMasters {
+		s := s
 		ins = append(ins, &TiSparkMasterInstance{
 			BaseInstance: BaseInstance{
 				InstanceSpec: s,