Merge pull request kubesphere#4718 from f10atin9/snapshot

Add "snapshot-count" annotation for volumesnapshotClass

pkg/models/resources/v1alpha3/volumesnapshotclass/volumesnapshotclass.go

@@ -17,8 +17,11 @@ limitations under the License.
 package volumesnapshotclass
 
 import (
+	"strconv"
 	"strings"
 
+	"k8s.io/apimachinery/pkg/labels"
+
 	v1 "github.com/kubernetes-csi/external-snapshotter/client/v4/apis/volumesnapshot/v1"
 	"github.com/kubernetes-csi/external-snapshotter/client/v4/informers/externalversions"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -53,6 +56,12 @@ func (v *volumeSnapshotClassGetter) List(namespace string, query *query.Query) (
 
 	var result []runtime.Object
 	for _, snapshotClass := range all {
+		snapshotClass = snapshotClass.DeepCopy()
+		count := v.countVolumeSnapshots(snapshotClass.Name)
+		if snapshotClass.Annotations == nil {
+			snapshotClass.Annotations = make(map[string]string)
+		}
+		snapshotClass.Annotations["kubesphere.io/snapshot-count"] = strconv.Itoa(count)
 		result = append(result, snapshotClass)
 	}
 
@@ -86,3 +95,18 @@ func (v *volumeSnapshotClassGetter) filter(object runtime.Object, filter query.F
 		return v1alpha3.DefaultObjectMetaFilter(snapshotClass.ObjectMeta, filter)
 	}
 }
+
+func (v *volumeSnapshotClassGetter) countVolumeSnapshots(name string) int {
+	snapshots, err := v.informers.Snapshot().V1().VolumeSnapshots().Lister().List(labels.Everything())
+	if err != nil {
+		return 0
+	}
+	var count int
+
+	for _, snapshot := range snapshots {
+		if snapshot.Spec.VolumeSnapshotClassName != nil && *snapshot.Spec.VolumeSnapshotClassName == name {
+			count++
+		}
+	}
+	return count
+}

pkg/models/resources/v1alpha3/volumesnapshotclass/volumesnapshotclass_test.go

@@ -72,6 +72,18 @@ func TestListVolumeSnapshotClass(t *testing.T) {
 	snapshotClass3.CreationTimestamp = v1.NewTime(snapshotClass1.CreationTimestamp.Add(time.Hour * 3))
 	snapshotClass3.DeletionPolicy = snapshotv1.VolumeSnapshotContentRetain
 
+	sc1Expected := snapshotClass1.DeepCopy()
+	sc1Expected.Annotations = make(map[string]string)
+	sc1Expected.Annotations["kubesphere.io/snapshot-count"] = "0"
+
+	sc2Expected := snapshotClass2.DeepCopy()
+	sc2Expected.Annotations = make(map[string]string)
+	sc2Expected.Annotations["kubesphere.io/snapshot-count"] = "0"
+
+	sc3Expected := snapshotClass3.DeepCopy()
+	sc3Expected.Annotations = make(map[string]string)
+	sc3Expected.Annotations["kubesphere.io/snapshot-count"] = "0"
+
 	volumeSnapshotClasses := []interface{}{snapshotClass1, snapshotClass2, snapshotClass3}
 
 	for _, s := range volumeSnapshotClasses {
@@ -86,7 +98,7 @@ func TestListVolumeSnapshotClass(t *testing.T) {
 			snapshotClassList, err := getter.List("", query1)
 			Expect(err).To(BeNil())
 			Expect(snapshotClassList.TotalItems).To(Equal(1))
-			Expect(snapshotClassList.Items[0]).To(Equal(snapshotClass1))
+			Expect(snapshotClassList.Items[0]).To(Equal(sc1Expected))
 		})
 
 		It("match driver", func() {
@@ -95,7 +107,7 @@ func TestListVolumeSnapshotClass(t *testing.T) {
 			snapshotClassList, err := getter.List("", query1)
 			Expect(err).To(BeNil())
 			Expect(snapshotClassList.TotalItems).To(Equal(1))
-			Expect(snapshotClassList.Items[0]).To(Equal(snapshotClass2))
+			Expect(snapshotClassList.Items[0]).To(Equal(sc2Expected))
 		})
 
 		It("match deletionPolicy", func() {
@@ -104,7 +116,7 @@ func TestListVolumeSnapshotClass(t *testing.T) {
 			snapshotClassList, err := getter.List("", query1)
 			Expect(err).To(BeNil())
 			Expect(snapshotClassList.TotalItems).To(Equal(1))
-			Expect(snapshotClassList.Items[0]).To(Equal(snapshotClass3))
+			Expect(snapshotClassList.Items[0]).To(Equal(sc3Expected))
 		})
 
 	})