diff --git a/pkg/util/annotation.go b/pkg/util/annotation.go
index 8f6ddcb..87ade3c 100644
--- a/pkg/util/annotation.go
+++ b/pkg/util/annotation.go
@@ -27,18 +27,19 @@ func GetZone(labels map[string]string) (string, bool) {
 func GetInstanceType(labels map[string]string) (string, bool) {
 	if _, ok := labels[v1.LabelInstanceType]; ok {
 		return labels[v1.LabelInstanceType], true
-	} else if _, ok := labels["node.kubernetes.io/instance-type"]; ok {
-		return labels["node.kubernetes.io/instance-type"], true
+	} else if _, ok := labels[v1.LabelInstanceTypeStable]; ok {
+		return labels[v1.LabelInstanceTypeStable], true
 	} else {
 		return "", false
 	}
 }
 
 func GetOperatingSystem(labels map[string]string) (string, bool) {
+	betaLabel := "beta.kubernetes.io/os"
 	if _, ok := labels[v1.LabelOSStable]; ok {
 		return labels[v1.LabelOSStable], true
-	} else if _, ok := labels["beta.kubernetes.io/os"]; ok {
-		return labels["beta.kubernetes.io/os"], true
+	} else if _, ok := lables[betaLabel]; ok {
+		return lables[betaLabel], true
 	} else {
 		return "", false
 	}
diff --git a/pkg/util/annotation_test.go b/pkg/util/annotation_test.go
new file mode 100644
index 0000000..b53160b
--- /dev/null
+++ b/pkg/util/annotation_test.go
@@ -0,0 +1,360 @@
+package util
+
+import (
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+)
+
+func TestGetRegion(t *testing.T) {
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelTopologyRegion: v1.LabelTopologyRegion,
+			},
+			want:  v1.LabelTopologyRegion,
+			want1: true,
+		},
+		{
+			name: "LabelZoneRegion",
+			labels: map[string]string{
+				v1.LabelZoneRegion: v1.LabelZoneRegion,
+			},
+			want:  v1.LabelZoneRegion,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetRegion(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetRegion() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetRegion() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func TestGetZone(t *testing.T) {
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelTopologyZone: v1.LabelTopologyZone,
+			},
+			want:  v1.LabelTopologyZone,
+			want1: true,
+		},
+		{
+			name: "LabelZoneFailureDomain",
+			labels: map[string]string{
+				v1.LabelZoneFailureDomain: v1.LabelZoneFailureDomain,
+			},
+			want:  v1.LabelZoneFailureDomain,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetZone(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetZone() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetZone() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func TestGetInstanceType(t *testing.T) {
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelInstanceType: v1.LabelInstanceType,
+			},
+			want:  v1.LabelInstanceType,
+			want1: true,
+		},
+		{
+			name: "LabelInstanceTypeStable",
+			labels: map[string]string{
+				v1.LabelInstanceTypeStable: v1.LabelInstanceTypeStable,
+			},
+			want:  v1.LabelInstanceTypeStable,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetInstanceType(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetInstanceType() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetInstanceType() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func TestGetOperatingSystem(t *testing.T) {
+	betaLabel := "beta.kubernetes.io/os"
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelOSStable: v1.LabelOSStable,
+			},
+			want:  v1.LabelOSStable,
+			want1: true,
+		},
+		{
+			name: "betaLabel",
+			labels: map[string]string{
+				betaLabel: betaLabel,
+			},
+			want:  betaLabel,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetOperatingSystem(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetOperatingSystem() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetOperatingSystem() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+
+import (
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+)
+
+func TestGetRegion(t *testing.T) {
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelTopologyRegion: v1.LabelTopologyRegion,
+			},
+			want:  v1.LabelTopologyRegion,
+			want1: true,
+		},
+		{
+			name: "LabelZoneRegion",
+			labels: map[string]string{
+				v1.LabelZoneRegion: v1.LabelZoneRegion,
+			},
+			want:  v1.LabelZoneRegion,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetRegion(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetRegion() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetRegion() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func TestGetZone(t *testing.T) {
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelTopologyZone: v1.LabelTopologyZone,
+			},
+			want:  v1.LabelTopologyZone,
+			want1: true,
+		},
+		{
+			name: "LabelZoneFailureDomain",
+			labels: map[string]string{
+				v1.LabelZoneFailureDomain: v1.LabelZoneFailureDomain,
+			},
+			want:  v1.LabelZoneFailureDomain,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetZone(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetZone() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetZone() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func TestGetInstanceType(t *testing.T) {
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelInstanceType: v1.LabelInstanceType,
+			},
+			want:  v1.LabelInstanceType,
+			want1: true,
+		},
+		{
+			name: "LabelInstanceTypeStable",
+			labels: map[string]string{
+				v1.LabelInstanceTypeStable: v1.LabelInstanceTypeStable,
+			},
+			want:  v1.LabelInstanceTypeStable,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetInstanceType(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetInstanceType() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetInstanceType() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func TestGetOperatingSystem(t *testing.T) {
+	betaLabel := "beta.kubernetes.io/os"
+	tests := []struct {
+		name   string
+		labels map[string]string
+		want   string
+		want1  bool
+	}{
+		{
+			name: "base",
+			labels: map[string]string{
+				v1.LabelOSStable: v1.LabelOSStable,
+			},
+			want:  v1.LabelOSStable,
+			want1: true,
+		},
+		{
+			name: "betaLabel",
+			labels: map[string]string{
+				betaLabel: betaLabel,
+			},
+			want:  betaLabel,
+			want1: true,
+		},
+		{
+			name:   "not found",
+			labels: map[string]string{},
+			want:   "",
+			want1:  false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, got1 := GetOperatingSystem(tt.labels)
+			if got != tt.want {
+				t.Errorf("GetOperatingSystem() got = %v, want %v", got, tt.want)
+			}
+			if got1 != tt.want1 {
+				t.Errorf("GetOperatingSystem() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}